Merge pull request #47 from truewhile/main

拉齐代码

.github/workflows/ci.yml

@@ -40,6 +40,39 @@ jobs:
       - name: go test
         run: go test ./...
 
+  database-compatibility:
+    name: SQLite / PostgreSQL ${{ matrix.postgres }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        postgres: [16, 17]
+    services:
+      postgres:
+        image: postgres:${{ matrix.postgres }}-alpine
+        env:
+          POSTGRES_USER: mebox
+          POSTGRES_PASSWORD: mebox-test-only
+          POSTGRES_DB: mebox_test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd "pg_isready -U mebox -d mebox_test"
+          --health-interval 5s
+          --health-timeout 5s
+          --health-retries 10
+    env:
+      MEBOX_TEST_POSTGRES_DSN: postgres://mebox:mebox-test-only@127.0.0.1:5432/mebox_test?sslmode=disable
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.26'
+          cache: true
+
+      - name: Database regression tests
+        run: go test ./internal/database ./internal/repository -count=1
+
   frontend:
     name: Frontend (Node)
     runs-on: ubuntu-latest
@@ -78,7 +111,7 @@ jobs:
   ci-success:
     name: CI Success
     runs-on: ubuntu-latest
-    needs: [backend, frontend, smoke]
+    needs: [backend, frontend, database-compatibility, smoke]
     if: success()
     steps:
       - run: echo "CI passed, ready for release"

CONTRIBUTING.md

@@ -84,6 +84,15 @@ go test ./internal/service -run "TestOrganize|TestSubscription|TestMTeam" -count
 go test ./cmd/server -count=1
 ```
 
+数据库兼容测试默认覆盖 SQLite。连接专用测试 PostgreSQL 后可运行真实的双数据库回归：
+
+```bash
+MEBOX_TEST_POSTGRES_DSN='postgres://mebox:test-password@127.0.0.1:5432/mebox_test?sslmode=disable' \
+  go test ./internal/database ./internal/repository -count=1
+```
+
+测试账号需要创建、删除 schema 的权限；每个用例使用独立的临时 schema。CI 会分别在 PostgreSQL 16、17 上执行这些检查。
+
 ### 代码要求
 
 - Go 代码使用 `gofmt`。

Dockerfile

@@ -84,12 +84,15 @@ ENV MEBOX_APP_PORT=8080 \
 
 EXPOSE 8080
 
-HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
-    CMD busybox wget -q --spider http://127.0.0.1:8080/api/health || exit 1
+# 探测协议不能写死：开启 HTTPS 后 8080 只接受 TLS。脚本按数据目录里的
+# .http_scheme 选择协议并在失败时回退，无需用户改配置。
+HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
+    CMD ["/usr/local/bin/mebox-healthcheck"]
 
 # Tiny entrypoint that lets us run as a NAS host UID/GID via PUID/PGID without
 # rewriting /etc/passwd or /etc/group on every container start.
 COPY docker-entrypoint.sh /entrypoint.sh
-RUN chmod +x /entrypoint.sh
+COPY docker-healthcheck.sh /usr/local/bin/mebox-healthcheck
+RUN chmod +x /entrypoint.sh /usr/local/bin/mebox-healthcheck
 
 CMD ["/entrypoint.sh"]

cmd/server/application.go

@@ -88,7 +88,7 @@ func (a *application) start() error {
 		a.logger.Error("database not ready", zap.Error(err))
 		return fmt.Errorf("database not ready: %w", err)
 	}
-	if err := database.AutoMigrate(db); err != nil {
+	if err := database.AutoMigrateWithConfig(db, a.cfg, a.logger); err != nil {
 		a.logger.Error("auto-migrate failed", zap.Error(err))
 		return fmt.Errorf("auto-migrate failed: %w", err)
 	}

cmd/server/protocol_mux.go

@@ -0,0 +1,129 @@
+package main
+
+import (
+	"bufio"
+	"net"
+	"sync"
+	"time"
+)
+
+// 开启 HTTPS 后，同一个端口会同时面对两类连接：
+//
+//   - TLS 客户端（浏览器、播放器）——正常提供 HTTPS 服务；
+//   - 明确访问 http:// 的客户端——以前只会撞出一句
+//     "Client sent an HTTP request to an HTTPS server."，用户看不懂。
+//
+// 一个端口上只有 TLS 监听时无法区分两者，所以在 Accept 之后先偷看第一个字节：
+// TLS 握手的记录类型固定是 0x16（handshake），而 HTTP 请求行必然是可见字符。
+// 据此把连接分流成两路，明文那一路交给只做跳转的 http.Server，于是 http:// 会被
+// 自动重定向到 https://（见 server_manager.go 的 httpsRedirectHandler）。
+const tlsRecordHandshake = 0x16
+
+// defaultPeekTimeout 限制"偷看首字节"阶段的等待，避免只连不发的半开连接长期占住
+// goroutine。分流器按实例持有该值，便于测试用更短的超时。
+const defaultPeekTimeout = 10 * time.Second
+
+// splitListener 是监听分流器：Accept 到底层连接后按首字节投递给对应的一路。
+type splitListener struct {
+	ln      net.Listener
+	tlsCh   chan net.Conn
+	plainCh chan net.Conn
+	quit    chan struct{}
+	once    sync.Once
+	peek    time.Duration
+}
+
+func newSplitListener(ln net.Listener) *splitListener {
+	return newSplitListenerWithTimeout(ln, defaultPeekTimeout)
+}
+
+func newSplitListenerWithTimeout(ln net.Listener, peek time.Duration) *splitListener {
+	s := &splitListener{
+		ln:      ln,
+		tlsCh:   make(chan net.Conn),
+		plainCh: make(chan net.Conn),
+		quit:    make(chan struct{}),
+		peek:    peek,
+	}
+	go s.acceptLoop()
+	return s
+}
+
+// tlsListener 返回只收到 TLS 连接的 listener。
+func (s *splitListener) tlsListener() net.Listener {
+	return &channelListener{addr: s.ln.Addr(), conns: s.tlsCh, quit: s.quit}
+}
+
+// plainListener 返回只收到明文 HTTP 连接的 listener。
+func (s *splitListener) plainListener() net.Listener {
+	return &channelListener{addr: s.ln.Addr(), conns: s.plainCh, quit: s.quit}
+}
+
+func (s *splitListener) acceptLoop() {
+	for {
+		conn, err := s.ln.Accept()
+		if err != nil {
+			// 底层监听关闭（换证、关停）后两路 Accept 一起返回 net.ErrClosed，
+			// 由持有它们的 http.Server 自行收尾。
+			s.stop()
+			return
+		}
+		go s.dispatch(conn)
+	}
+}
+
+func (s *splitListener) dispatch(conn net.Conn) {
+	br := bufio.NewReader(conn)
+	_ = conn.SetReadDeadline(time.Now().Add(s.peek))
+	first, err := br.Peek(1)
+	_ = conn.SetReadDeadline(time.Time{})
+	if err != nil {
+		_ = conn.Close()
+		return
+	}
+
+	peeked := &peekedConn{Conn: conn, r: br}
+	ch := s.plainCh
+	if first[0] == tlsRecordHandshake {
+		ch = s.tlsCh
+	}
+	select {
+	case ch <- peeked: // 交给对应的 http.Server，由它负责读写与关闭
+	case <-s.quit:
+		_ = conn.Close()
+	}
+}
+
+func (s *splitListener) stop() {
+	s.once.Do(func() { close(s.quit) })
+}
+
+// channelListener 把一路 channel 包装成 net.Listener，供 http.Server.Serve 使用。
+type channelListener struct {
+	addr  net.Addr
+	conns <-chan net.Conn
+	quit  <-chan struct{}
+}
+
+func (l *channelListener) Accept() (net.Conn, error) {
+	select {
+	case conn := <-l.conns:
+		return conn, nil
+	case <-l.quit:
+		return nil, net.ErrClosed
+	}
+}
+
+// Close 是空实现：真正要释放的端口在 splitListener 的底层监听上，它一旦关闭，
+// 这里的 Accept 就会返回 net.ErrClosed，http.Server 随之退出。
+func (l *channelListener) Close() error { return nil }
+
+func (l *channelListener) Addr() net.Addr { return l.addr }
+
+// peekedConn 把已经读进 bufio 缓冲的首字节还给上层读取者。
+type peekedConn struct {
+	net.Conn
+	r *bufio.Reader
+}
+
+func (c *peekedConn) Read(p []byte) (int, error) { return c.r.Read(p) }

cmd/server/protocol_mux_test.go

@@ -0,0 +1,140 @@
+package main
+
+import (
+	"io"
+	"net"
+	"net/http"
+	"testing"
+	"time"
+)
+
+func TestSplitListenerRoutesByFirstByte(t *testing.T) {
+	raw, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	split := newSplitListener(raw)
+	addr := raw.Addr().String()
+
+	// TLS：首字节 0x16。分流器偷看过的字节必须还能被上层读到，否则握手会失败。
+	handshake := []byte{0x16, 0x03, 0x01, 0x00, 0x2c}
+	tlsClient, err := net.Dial("tcp", addr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = tlsClient.Close() }()
+	if _, err := tlsClient.Write(handshake); err != nil {
+		t.Fatal(err)
+	}
+	tlsConn := <-split.tlsCh
+	defer func() { _ = tlsConn.Close() }()
+	got := make([]byte, len(handshake))
+	if _, err := io.ReadFull(tlsConn, got); err != nil {
+		t.Fatalf("read peeked tls bytes: %v", err)
+	}
+	if string(got) != string(handshake) {
+		t.Fatalf("tls bytes = %v, want %v", got, handshake)
+	}
+
+	// 明文 HTTP：请求行走另一路，同样要读到偷看过的首字节。
+	request := "GET /api/health HTTP/1.1\r\nHost: example.com\r\n\r\n"
+	plainClient, err := net.Dial("tcp", addr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = plainClient.Close() }()
+	if _, err := plainClient.Write([]byte(request)); err != nil {
+		t.Fatal(err)
+	}
+	plainConn := <-split.plainCh
+	defer func() { _ = plainConn.Close() }()
+	head := make([]byte, len("GET /"))
+	if _, err := io.ReadFull(plainConn, head); err != nil {
+		t.Fatalf("read peeked plain bytes: %v", err)
+	}
+	if string(head) != request[:len(head)] {
+		t.Fatalf("plain bytes = %q, want prefix of %q", head, request)
+	}
+
+	// 底层监听关闭后两路 Accept 都要返回 net.ErrClosed，http.Server 才能收尾。
+	_ = raw.Close()
+	for _, ln := range []net.Listener{split.tlsListener(), split.plainListener()} {
+		deadline := time.Now().Add(3 * time.Second)
+		for {
+			_, err := ln.Accept()
+			if err == net.ErrClosed {
+				break
+			}
+			if time.Now().After(deadline) {
+				t.Fatalf("Accept after close = %v, want net.ErrClosed", err)
+			}
+			time.Sleep(10 * time.Millisecond)
+		}
+	}
+}
+
+// 只连不发的半开连接不应被分给任何一路，而应在偷看超时后被丢弃。
+func TestSplitListenerDropsIdleConnection(t *testing.T) {
+	raw, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = raw.Close() }()
+	split := newSplitListenerWithTimeout(raw, 200*time.Millisecond)
+
+	conn, err := net.Dial("tcp", raw.Addr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = conn.Close() }()
+
+	select {
+	case c := <-split.plainCh:
+		_ = c.Close()
+		t.Fatal("idle connection should not be dispatched")
+	case c := <-split.tlsCh:
+		_ = c.Close()
+		t.Fatal("idle connection should not be dispatched")
+	case <-time.After(time.Second):
+	}
+}
+
+func TestHTTPSRedirectTarget(t *testing.T) {
+	cases := []struct {
+		name    string
+		host    string
+		rawURL  string
+		want    string
+		wantErr bool
+	}{
+		{name: "keeps host port path and query", host: "10.0.0.2:8080", rawURL: "/library?tab=1&q=a%20b", want: "https://10.0.0.2:8080/library?tab=1&q=a%20b"},
+		{name: "root path", host: "nas.local:18080", rawURL: "/", want: "https://nas.local:18080/"},
+		{name: "keeps escaping of user input", host: "10.0.0.2", rawURL: "/a%2Fb", want: "https://10.0.0.2/a%2Fb"},
+		{name: "absolute form request line", host: "10.0.0.2:8080", rawURL: "http://10.0.0.2:8080/api/x?y=1", want: "https://10.0.0.2:8080/api/x?y=1"},
+		{name: "rejects empty host", host: "", rawURL: "/", wantErr: true},
+		{name: "rejects host with slash", host: "evil.com/path", rawURL: "/", wantErr: true},
+		{name: "rejects userinfo host", host: "user@evil.com", rawURL: "/", wantErr: true},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			req, err := http.NewRequest(http.MethodGet, tc.rawURL, nil)
+			if err != nil {
+				t.Fatal(err)
+			}
+			req.Host = tc.host
+
+			if host := redirectHostHeader(req); host == "" {
+				if !tc.wantErr {
+					t.Fatalf("redirectHostHeader(%q) rejected, want accepted", tc.host)
+				}
+				return
+			}
+			if tc.wantErr {
+				t.Fatalf("redirectHostHeader(%q) accepted, want rejected", tc.host)
+			}
+			if got := httpsRedirectURL(tc.host, req); got != tc.want {
+				t.Fatalf("redirect target = %q, want %q", got, tc.want)
+			}
+		})
+	}
+}

cmd/server/server_manager.go

@@ -7,6 +7,8 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"os"
+	"path/filepath"
 	"strings"
 	"sync"
 	"time"
@@ -17,6 +19,14 @@ import (
 	"github.com/truewhile/MeBox/internal/service"
 )
 
+// httpSchemeFileName 是数据目录下记录当前监听协议的小文件（内容为 http 或 https）。
+//
+// 容器健康检查无法读取后台保存的 HTTPS 设置（它存在数据库里），而同一端口在开启
+// HTTPS 后只接受 TLS。若健康检查固定用 http:// 探测，每轮都会撞出
+// "client sent an HTTP request to an HTTPS server"，既刷日志又让容器永远 unhealthy。
+// 因此由服务进程在每次成功绑定监听后写下真实协议，供 docker-healthcheck.sh 选择。
+const httpSchemeFileName = ".http_scheme"
+
 // tlsPair 记录当前正在服务的证书，用于判断是否需要重新绑定监听。
 type tlsPair struct {
 	cert    tls.Certificate
@@ -35,6 +45,9 @@ type tlsPair struct {
 //   - 旧服务器随后优雅退出，正在进行的播放/请求不会被立刻掐断。
 //
 // 任何校验失败都会中止切换并保留旧监听，保证用户不会被锁在服务外面。
+//
+// 开启 HTTPS 时端口上会同时接两类连接：TLS 走主服务器，明文 HTTP 走
+// redirectSrv 并跳转到 HTTPS（见 protocol_mux.go）。
 type serverManager struct {
 	cfg     *config.Config
 	log     *zap.Logger
@@ -43,6 +56,7 @@ type serverManager struct {
 
 	mu                sync.Mutex
 	srv               *http.Server
+	redirectSrv       *http.Server
 	ln                net.Listener
 	pair              *tlsPair
 	stopCh            chan struct{}
@@ -92,11 +106,11 @@ func (m *serverManager) Reload() error {
 		return nil
 	}
 
-	oldSrv, oldLn, oldPair := m.srv, m.ln, m.pair
+	oldSrv, oldRedirect, oldLn, oldPair := m.srv, m.redirectSrv, m.ln, m.pair
 	if oldLn != nil {
 		_ = oldLn.Close() // 释放端口后再绑定新监听
 	}
-	m.srv, m.ln, m.pair = nil, nil, nil
+	m.srv, m.redirectSrv, m.ln, m.pair = nil, nil, nil, nil
 
 	firstErr := m.bind(pair)
 	if firstErr != nil {
@@ -107,6 +121,7 @@ func (m *serverManager) Reload() error {
 	}
 	// 新监听已就绪，让旧服务器在新连接切换到新监听后优雅退出。
 	m.drain(oldSrv)
+	m.drain(oldRedirect)
 	m.logServerReady()
 	m.maybeStartAutoReloadLocked()
 	return firstErr
@@ -120,11 +135,19 @@ func (m *serverManager) Shutdown(ctx context.Context) error {
 		close(m.stopCh)
 	}
 	m.mu.Lock()
-	defer m.mu.Unlock()
-	if m.srv == nil {
-		return nil
+	targets := []*http.Server{m.srv, m.redirectSrv}
+	m.mu.Unlock()
+
+	var firstErr error
+	for _, srv := range targets {
+		if srv == nil {
+			continue
+		}
+		if err := srv.Shutdown(ctx); err != nil && firstErr == nil {
+			firstErr = err
+		}
 	}
-	return m.srv.Shutdown(ctx)
+	return firstErr
 }
 
 // desiredPair 根据当前配置计算目标监听形态：nil 表示明文 HTTP，非 nil 表示 TLS。
@@ -217,25 +240,107 @@ func (m *serverManager) pairEquals(pair *tlsPair) bool {
 	return pair.version == m.pair.version
 }
 
-// bind 创建并按需启用 TLS 的监听，异步开始服务。
+// bind 创建监听，异步开始服务。
+//
+// 未开启 HTTPS 时端口只服务明文 HTTP；开启后同一个端口两种流量都要接：TLS 连接
+// 交给主服务器，明文 HTTP 连接交给只做跳转的 redirect 服务器，让 http:// 自动
+// 跳到 https://，而不是甩给用户一句 "Client sent an HTTP request to an HTTPS
+// server."。
 func (m *serverManager) bind(pair *tlsPair) error {
 	ln, err := net.Listen("tcp", m.addr)
 	if err != nil {
 		return fmt.Errorf("listen %s: %w", m.addr, err)
 	}
-	srv := &http.Server{
-		Handler:           m.handler,
+
+	if pair == nil {
+		srv := m.newHTTPServer(m.handler)
+		m.srv, m.redirectSrv, m.ln, m.pair = srv, nil, ln, nil
+		m.writeSchemeState(nil)
+		go m.serve(srv, ln)
+		return nil
+	}
+
+	split := newSplitListener(ln)
+	srv := m.newHTTPServer(m.handler)
+	tlsLn := tls.NewListener(split.tlsListener(), &tls.Config{
+		Certificates: []tls.Certificate{pair.cert},
+		MinVersion:   tls.VersionTLS12,
+	})
+	redirect := m.newHTTPServer(m.httpsRedirectHandler())
+
+	m.srv, m.redirectSrv, m.ln, m.pair = srv, redirect, ln, pair
+	m.writeSchemeState(pair)
+	go m.serve(srv, tlsLn)
+	go m.serve(redirect, split.plainListener())
+	return nil
+}
+
+func (m *serverManager) newHTTPServer(handler http.Handler) *http.Server {
+	return &http.Server{
+		Handler:           handler,
 		ReadHeaderTimeout: 15 * time.Second,
 	}
-	if pair != nil {
-		ln = tls.NewListener(ln, &tls.Config{
-			Certificates: []tls.Certificate{pair.cert},
-			MinVersion:   tls.VersionTLS12,
-		})
+}
+
+// httpsRedirectHandler 处理"开着 HTTPS 却用 http:// 访问"的请求：跳转到同端口、
+// 同路径的 https://。
+//
+// 用 302/307 而不是 301/308：HTTPS 开关可以在后台随时改，永久跳转会被浏览器长期
+// 缓存，等用户关掉 HTTPS 之后 http 访问会被带到已经不提供 TLS 的端口上打不开。
+func (m *serverManager) httpsRedirectHandler() http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		host := redirectHostHeader(r)
+		if host == "" {
+			// 没有可用的 Host（HTTP/1.0 或畸形请求头）时宁可明说，也不跳到错的地方。
+			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprintf(w, "HTTPS is enabled; open https://<host>:%d instead.\n", m.cfg.App.Port)
+			return
+		}
+		status := http.StatusFound
+		if r.Method != http.MethodGet && r.Method != http.MethodHead {
+			status = http.StatusTemporaryRedirect // 保住方法与请求体
+		}
+		w.Header().Set("Location", httpsRedirectURL(host, r))
+		w.WriteHeader(status)
+	})
+}
+
+// httpsRedirectURL 拼出同端口同路径的 HTTPS 地址。
+func httpsRedirectURL(host string, r *http.Request) string {
+	target := "https://" + host + r.URL.EscapedPath()
+	if r.URL.RawQuery != "" {
+		target += "?" + r.URL.RawQuery
+	}
+	return target
+}
+
+// redirectHostHeader 取重定向目标主机。HTTP/1.1 里 Host 是唯一的主机来源（端口映射
+// 到容器 8080 时它同时也是 HTTPS 端口），这里只做字符过滤，避免把请求头里的怪字符
+// 带进 Location 造成任意跳转。
+func redirectHostHeader(r *http.Request) string {
+	host := strings.TrimSpace(r.Host)
+	if host == "" || strings.ContainsAny(host, " \t\r\n/\\@?#") {
+		return ""
+	}
+	return host
+}
+
+// writeSchemeState 把当前实际监听的协议写入数据目录，供容器健康检查按协议探测。
+// 写失败只降级为告警：健康检查脚本在状态文件缺失时会回退试另一种协议。
+func (m *serverManager) writeSchemeState(pair *tlsPair) {
+	dataDir := strings.TrimSpace(m.cfg.App.DataDir)
+	if dataDir == "" {
+		return
+	}
+	scheme := "http"
+	if pair != nil {
+		scheme = "https"
+	}
+	path := filepath.Join(dataDir, httpSchemeFileName)
+	if err := os.WriteFile(path, []byte(scheme+"\n"), 0o644); err != nil { // #nosec G304 -- path is DataDir + fixed filename.
+		m.log.Warn("write http scheme state failed", zap.String("path", path), zap.Error(err))
 	}
-	m.srv, m.ln, m.pair = srv, ln, pair
-	go m.serve(srv, ln)
-	return nil
 }
 
 func (m *serverManager) serve(s *http.Server, ln net.Listener) {
@@ -250,6 +355,9 @@ func (m *serverManager) drain(s *http.Server) {
 	if s == nil {
 		return
 	}
+	// Stop reusing old connections before Reload returns. Asynchronous Shutdown
+	// alone leaves a window where a client receives the previous HTTP/TLS mode.
+	s.SetKeepAlivesEnabled(false)
 	go func(s *http.Server) {
 		ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
 		defer cancel()
@@ -271,7 +379,7 @@ func (m *serverManager) logServerReady() {
 		zap.String("listen", m.addr),
 	)
 	if m.pair != nil {
-		m.log.Info("HTTPS is enabled; plain HTTP is no longer served on this port",
+		m.log.Info("HTTPS is enabled; plain HTTP requests on this port are redirected to HTTPS",
 			zap.String("addr", m.addr),
 		)
 	}

cmd/server/server_manager_test.go

@@ -1,13 +1,17 @@
 package main
 
 import (
+	"context"
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
+	"crypto/tls"
 	"crypto/x509"
 	"crypto/x509/pkix"
 	"encoding/pem"
+	"io"
 	"math/big"
+	"net"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -32,6 +36,8 @@ func makeTestPairPEM(t *testing.T) (certPEM, keyPEM string) {
 		NotBefore:    time.Now().Add(-time.Hour),
 		NotAfter:     time.Now().Add(24 * time.Hour),
 		DNSNames:     []string{"localhost"},
+		// 带上回环 IP，HTTPS 客户端就能在校验证书的前提下连 127.0.0.1:port。
+		IPAddresses: []net.IP{net.ParseIP("127.0.0.1")},
 	}
 	der, err := x509.CreateCertificate(rand.Reader, tpl, tpl, &priv.PublicKey, priv)
 	if err != nil {
@@ -105,3 +111,136 @@ func TestDesiredPairModes(t *testing.T) {
 		t.Fatal("version should change after files replaced")
 	}
 }
+
+// 健康检查依赖该文件判断该用 http 还是 https 探测，内容与当前监听协议必须一致，
+// 否则容器会一直显示 unhealthy 并刷 TLS handshake error 日志。
+func TestWriteSchemeState(t *testing.T) {
+	m := newTestServerManager(t)
+	m.cfg.App.DataDir = t.TempDir()
+	path := filepath.Join(m.cfg.App.DataDir, httpSchemeFileName)
+
+	m.writeSchemeState(nil)
+	if data, err := os.ReadFile(path); err != nil || strings.TrimSpace(string(data)) != "http" {
+		t.Fatalf("plain HTTP state: data=%q err=%v", data, err)
+	}
+
+	m.writeSchemeState(&tlsPair{})
+	if data, err := os.ReadFile(path); err != nil || strings.TrimSpace(string(data)) != "https" {
+		t.Fatalf("HTTPS state: data=%q err=%v", data, err)
+	}
+
+	// DataDir 为空时不应写到工作目录（测试/裸跑二进制时会污染仓库）。
+	m.cfg.App.DataDir = ""
+	_ = os.Remove(path)
+	m.writeSchemeState(nil)
+	if _, err := os.Stat(httpSchemeFileName); !os.IsNotExist(err) {
+		t.Fatalf("empty DataDir should not create %s in cwd: %v", httpSchemeFileName, err)
+	}
+}
+
+// 开启 HTTPS 后同一个端口要同时接 TLS 与明文 HTTP：明文请求跳到 HTTPS，而不是
+// 给用户看 "Client sent an HTTP request to an HTTPS server."。
+func TestServerManagerRedirectsPlainHTTPToHTTPS(t *testing.T) {
+	certPEM, keyPEM := makeTestPairPEM(t)
+	cfg := &config.Config{}
+	cfg.App.Port = 8080
+	cfg.App.DataDir = t.TempDir()
+	cfg.App.HTTPSEnabled = true
+	cfg.App.SSLCert, cfg.App.SSLKey = certPEM, keyPEM
+
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		_, _ = io.WriteString(w, "secure:"+r.URL.Path)
+	})
+	m := newServerManager(cfg, zap.NewNop(), handler)
+	m.addr = "127.0.0.1:0" // 端口 0 交给内核分配，测试之间不会撞端口
+	if err := m.Start(); err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = m.Shutdown(context.Background()) })
+
+	addr := m.ln.Addr().String()
+	// 端口 0 只在第一次分配时用；热切换要绑回同一个端口（生产里端口本来就是固定的）。
+	m.addr = addr
+	schemeFile := filepath.Join(cfg.App.DataDir, httpSchemeFileName)
+	if data, err := os.ReadFile(schemeFile); err != nil || strings.TrimSpace(string(data)) != "https" {
+		t.Fatalf("scheme state = %q err=%v, want https", data, err)
+	}
+
+	plain := &http.Client{
+		Timeout:       10 * time.Second,
+		CheckRedirect: func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse },
+	}
+
+	resp, err := plain.Get("http://" + addr + "/library?tab=1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = resp.Body.Close() }()
+	if resp.StatusCode != http.StatusFound {
+		t.Fatalf("plain GET status = %d, want %d", resp.StatusCode, http.StatusFound)
+	}
+	if got, want := resp.Header.Get("Location"), "https://"+addr+"/library?tab=1"; got != want {
+		t.Fatalf("Location = %q, want %q", got, want)
+	}
+
+	postResp, err := plain.Post("http://"+addr+"/api/me/login", "application/json", strings.NewReader("{}"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = postResp.Body.Close() }()
+	if postResp.StatusCode != http.StatusTemporaryRedirect {
+		t.Fatalf("plain POST status = %d, want %d", postResp.StatusCode, http.StatusTemporaryRedirect)
+	}
+	if got, want := postResp.Header.Get("Location"), "https://"+addr+"/api/me/login"; got != want {
+		t.Fatalf("POST Location = %q, want %q", got, want)
+	}
+
+	// 同一端口上的 TLS 连接照常拿到正常响应（校验证书，不做跳过校验）。
+	pool := x509.NewCertPool()
+	if !pool.AppendCertsFromPEM([]byte(certPEM)) {
+		t.Fatal("append test certificate to pool failed")
+	}
+	secure := &http.Client{
+		Timeout: 10 * time.Second,
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{RootCAs: pool, MinVersion: tls.VersionTLS12},
+		},
+	}
+	secureResp, err := secure.Get("https://" + addr + "/library")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = secureResp.Body.Close() }()
+	body, err := io.ReadAll(secureResp.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if secureResp.StatusCode != http.StatusOK || string(body) != "secure:/library" {
+		t.Fatalf("https response = %d %q, want 200 %q", secureResp.StatusCode, body, "secure:/library")
+	}
+
+	// 关掉 HTTPS 后同一端口回到纯明文服务，不再有多余的跳转服务器。
+	cfg.App.HTTPSEnabled = false
+	if err := m.Reload(); err != nil {
+		t.Fatal(err)
+	}
+	if m.redirectSrv != nil {
+		t.Fatal("redirect server should be released when HTTPS is off")
+	}
+	if data, err := os.ReadFile(schemeFile); err != nil || strings.TrimSpace(string(data)) != "http" {
+		t.Fatalf("scheme state = %q err=%v, want http", data, err)
+	}
+	plainResp, err := plain.Get("http://" + addr + "/library")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = plainResp.Body.Close() }()
+	plainBody, err := io.ReadAll(plainResp.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if plainResp.StatusCode != http.StatusOK || string(plainBody) != "secure:/library" {
+		t.Fatalf("plain response after disabling https = %d %q", plainResp.StatusCode, plainBody)
+	}
+}

docker-compose.metatube.yml

@@ -62,7 +62,7 @@ services:
       # NAS 示例：source: /vol1/1000/Media
       # Windows Docker Desktop 示例：source: D:/Media
       # create_host_path=false 可以避免路径写错时 Docker 自动创建空文件夹。
-      - ./media: /media
+      - ./media:/media
 
     environment:
       TZ: Asia/Shanghai
@@ -105,7 +105,9 @@ services:
       MEBOX_TRANSCODER_IDLE_TIMEOUT_SECONDS: "120"
 
     healthcheck:
-      test: ["CMD-SHELL", "busybox wget -qO- http://127.0.0.1:8080/api/health || exit 1"]
+      # 不能写死 http://：开启 HTTPS 后 8080 只接受 TLS，固定明文探测会
+      # 每轮刷一条 TLS handshake error 并让容器一直 unhealthy。
+      test: ["CMD", "/usr/local/bin/mebox-healthcheck"]
       interval: 30s
       timeout: 10s
       retries: 5

docker-compose.search.yml

@@ -115,7 +115,9 @@ services:
       MEBOX_TRANSCODER_IDLE_TIMEOUT_SECONDS: "120"
 
     healthcheck:
-      test: ["CMD-SHELL", "busybox wget -qO- http://127.0.0.1:8080/api/health || exit 1"]
+      # 不能写死 http://：开启 HTTPS 后 8080 只接受 TLS，固定明文探测会
+      # 每轮刷一条 TLS handshake error 并让容器一直 unhealthy。
+      test: ["CMD", "/usr/local/bin/mebox-healthcheck"]
       interval: 30s
       timeout: 10s
       retries: 5

docker-compose.simple.yml

@@ -73,7 +73,9 @@ services:
       - "host.docker.internal:host-gateway"
 
     healthcheck:
-      test: ["CMD-SHELL", "busybox wget -qO- http://127.0.0.1:8080/api/health || exit 1"]
+      # 不能写死 http://：开启 HTTPS 后 8080 只接受 TLS，固定明文探测会
+      # 每轮刷一条 TLS handshake error 并让容器一直 unhealthy。
+      test: ["CMD", "/usr/local/bin/mebox-healthcheck"]
       interval: 30s
       timeout: 10s
       retries: 5

docker-compose.standard.yml

@@ -44,7 +44,7 @@ services:
       # NAS 示例：source: /vol1/1000/Media
       # Windows Docker Desktop 示例：source: D:/Media
       # create_host_path=false 可以避免路径写错时 Docker 自动创建空文件夹。
-      - ./media: /media
+      - ./media:/media
 
     environment:
       TZ: Asia/Shanghai
@@ -87,7 +87,9 @@ services:
       MEBOX_TRANSCODER_IDLE_TIMEOUT_SECONDS: "120"
 
     healthcheck:
-      test: ["CMD-SHELL", "busybox wget -qO- http://127.0.0.1:8080/api/health || exit 1"]
+      # 不能写死 http://：开启 HTTPS 后 8080 只接受 TLS，固定明文探测会
+      # 每轮刷一条 TLS handshake error 并让容器一直 unhealthy。
+      test: ["CMD", "/usr/local/bin/mebox-healthcheck"]
       interval: 30s
       timeout: 10s
       retries: 5

docker-compose.yml

@@ -131,7 +131,9 @@ services:
       MEBOX_TRANSCODER_IDLE_TIMEOUT_SECONDS: "120"
 
     healthcheck:
-      test: ["CMD-SHELL", "busybox wget -qO- http://127.0.0.1:8080/api/health || exit 1"]
+      # 不能写死 http://：开启 HTTPS 后 8080 只接受 TLS，固定明文探测会
+      # 每轮刷一条 TLS handshake error 并让容器一直 unhealthy。
+      test: ["CMD", "/usr/local/bin/mebox-healthcheck"]
       interval: 30s
       timeout: 10s
       retries: 5

docker-healthcheck.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+# MeBox 容器健康检查。
+#
+# 背景：MeBox 只监听一个端口，且开启 HTTPS 后该端口只接受 TLS（明文 HTTP 不再
+# 服务）。健康检查若固定用 http:// 探测，每轮都会被 TLS 监听拒绝并在服务日志里
+# 留下一条 "client sent an HTTP request to an HTTPS server"，同时容器状态永远
+# 是 unhealthy。反过来固定用 https:// 探测，则在未开启 HTTPS 的部署上产生
+# "first record does not look like a TLS handshake"。
+#
+# 当前协议由服务进程写入 $MEBOX_APP_DATA_DIR/.http_scheme（见
+# cmd/server/server_manager.go 的 writeSchemeState）。脚本优先按该文件选择协议，
+# 文件缺失或该协议探测失败时再试另一种，避免状态文件过期导致误报不健康。
+set -u
+
+port="${MEBOX_APP_PORT:-8080}"
+data_dir="${MEBOX_APP_DATA_DIR:-/data}"
+
+scheme_file="$data_dir/.http_scheme"
+scheme=""
+if [ -r "$scheme_file" ]; then
+	scheme="$(tr -d '[:space:]' <"$scheme_file")"
+fi
+if [ "$scheme" = "https" ]; then
+	first="https"
+	second="http"
+else
+	first="http"
+	second="https"
+fi
+
+for proto in "$first" "$second"; do
+	# --no-check-certificate：用户常用自签证书或 IP 访问，校验域名必然会失败。
+	if busybox wget -q --spider -T 3 --no-check-certificate \
+		"$proto://127.0.0.1:$port/api/health" >/dev/null 2>&1; then
+		exit 0
+	fi
+done
+
+exit 1

docs/mobile-api/deployment.md

@@ -0,0 +1,91 @@
+# MeBox Mobile API 接入与部署说明
+
+更新日期：2026-10-17  
+适用版本：后端 `feature/android-mobile-api` 分支；App `0.1.0`（versionCode 1）。
+
+## 1. 路径与版本
+
+- 安卓契约挂载在 `/api/v1`，与既有 `/api`、Emby/Jellyfin 入口并行。
+- 健康检查：`GET /api/health`。
+- 实例身份：`GET /api/v1/server-info`（匿名，`Cache-Control: no-store`）。
+- 契约字段与错误码见同目录 `openapi.yaml`。
+
+`server-info.capabilities` 必须反映真实运行能力。当前分支只有
+`device_sessions=true`；播放会话、阅读 v1 进度、批量正文与移动端转码仍为
+`false`，App 不得据此进入对应流程。
+
+## 2. 连接与传输安全
+
+- 公网必须使用 HTTPS；App 默认使用系统信任链，不提供全局跳过证书校验。
+- 局域网 HTTP 需要用户在 App 内明确确认风险；App 只对当前配置的服务器来源
+  使用明文，不会把 MeBox `Authorization` 发往其它主机。
+- 首版只支持根路径部署。`https://host/mebox` 这类子路径会被 App 明确拒绝，
+  不会静默截断为根路径。
+- 反代需要保留 `X-Request-ID`（可选）；服务端会回传同值或新生成值，用于
+  日志对账。
+
+## 3. 反向代理检查项
+
+以下项用于媒体阶段（M3/M4）回归，当前登录闭环不依赖它们，但仍建议提前配置：
+
+| 项目 | 要求 |
+| --- | --- |
+| Range / 206 | 透传客户端 `Range`，不要缓存完整响应后改写状态码 |
+| 流式响应 | 关闭代理缓冲（如 nginx `proxy_buffering off`） |
+| HLS | `.m3u8` 与分片路径不要被改写或强制压缩 |
+| WebSocket | 升级头透传，读超时大于心跳间隔 |
+| 超时 | 登录/普通 API 30 秒内完成；转码起播超时单独配置 |
+
+目前只验证了普通 JSON 端点；上表其余项尚未在本分支验收。
+
+## 4. 认证与会话
+
+- `POST /api/v1/auth/login` 创建 `auth_sessions` 记录，访问令牌 JWT 增加 `sid`。
+- 旧 `/api` 中间件同样校验 `sid`：设备被踢出或退出后，未过期的 JWT 也会立即
+  返回 401，不能借旧入口绕过。
+- 没有 `sid` 的历史令牌继续按原逻辑访问旧 API；v1 认证端点拒绝这类令牌，
+  App 需要重新登录。
+- `POST /api/v1/auth/logout` 幂等；会话撤销会同时撤销其名下刷新令牌。
+- 设备管理中的踢出操作会同步撤销该设备认证会话。
+
+### 刷新轮换边界
+
+- 同一个刷新令牌的并发请求共享一次轮换；60 秒宽限期内重复提交返回同一结果。
+- 轮换结果仍保存在进程内。若新令牌已签发、旧令牌已撤销，但客户端没收到响应
+  且服务器随后重启，旧令牌可能无法恢复；此时 App 应要求重新登录。首版接受
+  该边界，未实现持久化幂等轮换。
+- 会话被撤销时，刷新返回 `401 SESSION_REVOKED`，优先于宽限期复用。
+
+## 5. 错误契约
+
+统一响应：
+
+```json
+{
+  "code": "SESSION_REVOKED",
+  "message": "auth session revoked or expired",
+  "request_id": "8a3bade4-cbb3-485b-8e34-2471e4940fc3",
+  "retryable": false
+}
+```
+
+- 401 由 `code` 区分 `TOKEN_EXPIRED`、`SESSION_REVOKED`、`INVALID_CREDENTIALS`。
+- 403 表示权限或账号状态，不触发刷新。
+- 429 带 `Retry-After`，客户端必须等待。
+- 5xx / `SERVICE_UNAVAILABLE` / `retryable=true` 表示可安全重试。
+
+## 6. 数据迁移与回滚
+
+- 新表 `auth_sessions` 与 `refresh_tokens.auth_session_id` 由现有 AutoMigrate
+  创建，属于增量变更，不清库。
+- SQLite 已验证；PostgreSQL 迁移需要在有实例的环境中单独执行
+  `go test ./internal/database ./internal/repository -count=1` 后才能宣称通过。
+- 回滚到旧版本不会删除新表；旧程序忽略新增字段。回滚前应先确认不需要再
+  依赖 `sid` 即时撤销能力。
+
+## 7. 已知限制
+
+- 单实例部署；未实现多副本共享会话。
+- 外部播放令牌尚未继承 `sid`（属于 M3 播放会话范围），当前不能按设备即时撤销。
+- 反代子路径、自签名证书信任、多服务器配置均未支持。
+- App 目前只开放连接、登录、会话恢复与退出；媒体与阅读入口未实现。

docs/mobile-api/openapi.yaml

@@ -0,0 +1,389 @@
+openapi: 3.0.3
+info:
+  title: MeBox Mobile API
+  version: 1.0.0
+  description: |
+    MeBox 安卓客户端的稳定接入契约。所有路径以 `/api` 为前缀挂载，
+    本文档描述 `/api/v1` 部分；既有 `/api` 与 Emby/Jellyfin 入口保持兼容。
+
+    约定：
+    - JSON 字段使用 snake_case；
+    - 时间点为 RFC 3339 UTC 字符串，播放位置与时长使用整数毫秒；
+    - 集合为空时返回 `[]`，未知字段客户端必须忽略；
+    - 错误响应统一为 `code`、`message`、`request_id`、`retryable`；
+    - 能力开关只有在接口实现且当前可运行时才为 true。
+servers:
+  - url: /api
+security:
+  - bearerAuth: []
+tags:
+  - name: server
+  - name: auth
+paths:
+  /v1/server-info:
+    get:
+      tags: [server]
+      summary: 匿名读取实例身份与移动端能力
+      security: []
+      responses:
+        '200':
+          description: 实例可连接
+          headers:
+            Cache-Control:
+              schema:
+                type: string
+              description: 固定为 no-store
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ServerInfo'
+        '503':
+          description: 暂时无法读取实例身份
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/MobileError'
+  /v1/auth/login:
+    post:
+      tags: [auth]
+      summary: 账号密码登录并创建认证会话
+      security: []
+      parameters:
+        - $ref: '#/components/parameters/RequestId'
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/LoginRequest'
+      responses:
+        '200':
+          description: 登录成功
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/AuthResponse'
+        '400':
+          $ref: '#/components/responses/InvalidArgument'
+        '401':
+          $ref: '#/components/responses/InvalidCredentials'
+        '403':
+          description: 账号被禁用或已到期
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/MobileError'
+        '429':
+          $ref: '#/components/responses/RateLimited'
+        '503':
+          $ref: '#/components/responses/ServiceUnavailable'
+  /v1/auth/refresh:
+    post:
+      tags: [auth]
+      summary: 使用刷新令牌轮换令牌对
+      security: []
+      description: |
+        刷新令牌必须由 v1 登录签发并关联认证会话。同一 refresh token 的
+        并发提交只会真正轮换一次；轮换后 60 秒内重复提交返回同一次结果。
+        会话被撤销后刷新返回 SESSION_REVOKED。
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/RefreshRequest'
+      responses:
+        '200':
+          description: 刷新成功，新令牌继续归属同一 auth_session_id
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/AuthResponse'
+        '400':
+          $ref: '#/components/responses/InvalidArgument'
+        '401':
+          description: 刷新令牌无效、过期或会话已撤销
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/MobileError'
+        '503':
+          $ref: '#/components/responses/ServiceUnavailable'
+  /v1/auth/session:
+    get:
+      tags: [auth]
+      summary: 读取当前用户与认证会话
+      responses:
+        '200':
+          description: 会话有效
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SessionResponse'
+        '401':
+          $ref: '#/components/responses/SessionInvalid'
+        '503':
+          $ref: '#/components/responses/ServiceUnavailable'
+  /v1/auth/logout:
+    post:
+      tags: [auth]
+      summary: 撤销当前认证会话
+      description: 幂等；重复退出同样返回 200。
+      responses:
+        '200':
+          description: 已退出（本机与远端）
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  status:
+                    type: string
+                    example: ok
+        '401':
+          $ref: '#/components/responses/SessionInvalid'
+        '503':
+          $ref: '#/components/responses/ServiceUnavailable'
+components:
+  securitySchemes:
+    bearerAuth:
+      type: http
+      scheme: bearer
+      bearerFormat: JWT
+  parameters:
+    RequestId:
+      name: X-Request-ID
+      in: header
+      required: false
+      description: |
+        可选的诊断 ID（8—128 位 ASCII 字母、数字或 `-_.:`）。服务器会在
+        响应头与错误体回传同一个值；非法值会被替换为新 UUID。该值不参与鉴权。
+      schema:
+        type: string
+  responses:
+    InvalidArgument:
+      description: 请求字段缺失或格式错误
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/MobileError'
+    InvalidCredentials:
+      description: 用户名或密码错误
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/MobileError'
+    SessionInvalid:
+      description: 访问令牌无效、过期或认证会话已撤销
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/MobileError'
+    RateLimited:
+      description: 请求过于频繁
+      headers:
+        Retry-After:
+          schema:
+            type: integer
+          description: 建议等待秒数
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/MobileError'
+    ServiceUnavailable:
+      description: 暂时性服务/存储错误，可安全重试
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/MobileError'
+  schemas:
+    ServerInfo:
+      type: object
+      required:
+        - name
+        - server_id
+        - server_version
+        - api_version
+        - min_supported_app_version_code
+        - capabilities
+      properties:
+        name:
+          type: string
+          example: MeBox
+        server_id:
+          type: string
+          format: uuid
+          description: 实例持久身份；备份克隆成独立实例时必须显式重置。
+        server_version:
+          type: string
+          example: MeBox-v0.1.16
+        api_version:
+          type: string
+          example: v1
+        min_supported_app_version_code:
+          type: integer
+          minimum: 1
+        capabilities:
+          $ref: '#/components/schemas/ServerCapabilities'
+    ServerCapabilities:
+      type: object
+      required:
+        - device_sessions
+        - playback_sessions
+        - reader_progress_v1
+        - reader_content_batch
+        - local_transcode
+      properties:
+        device_sessions:
+          type: boolean
+          description: M1 起为 true
+        playback_sessions:
+          type: boolean
+          description: 播放会话接口未实现前必须为 false
+        reader_progress_v1:
+          type: boolean
+          description: v1 阅读锚点/版本冲突未实现前必须为 false
+        reader_content_batch:
+          type: boolean
+          description: v1 批量正文与资源引用未实现前必须为 false
+        local_transcode:
+          type: boolean
+          description: 移动端可用的本地转码会话未实现前必须为 false
+    MobileUser:
+      type: object
+      required: [id, username, role, tier, is_active, force_password_reset]
+      properties:
+        id:
+          type: string
+        username:
+          type: string
+        nickname:
+          type: string
+        role:
+          type: string
+          enum: [admin, user]
+        tier:
+          type: string
+          example: free
+        is_active:
+          type: boolean
+        force_password_reset:
+          type: boolean
+        expires_at:
+          type: string
+          format: date-time
+          nullable: true
+    TokenPair:
+      type: object
+      required: [access_token, refresh_token, expires_in, token_type]
+      properties:
+        access_token:
+          type: string
+        refresh_token:
+          type: string
+        expires_in:
+          type: integer
+          description: 访问令牌有效秒数
+        token_type:
+          type: string
+          example: Bearer
+    LoginRequest:
+      type: object
+      required: [username, password, device_id]
+      properties:
+        username:
+          type: string
+        password:
+          type: string
+        device_id:
+          type: string
+          maxLength: 128
+          description: App 安装随机生成，不使用 IMEI/MAC 等硬件标识。
+        device_name:
+          type: string
+          maxLength: 128
+        client_name:
+          type: string
+          maxLength: 64
+          example: MeBox Android
+        client_version:
+          type: string
+          maxLength: 64
+    RefreshRequest:
+      type: object
+      required: [refresh_token]
+      properties:
+        refresh_token:
+          type: string
+    AuthResponse:
+      type: object
+      required: [auth_session_id, user, tokens]
+      properties:
+        auth_session_id:
+          type: string
+          format: uuid
+        user:
+          $ref: '#/components/schemas/MobileUser'
+        tokens:
+          $ref: '#/components/schemas/TokenPair'
+    SessionDevice:
+      type: object
+      properties:
+        device_id:
+          type: string
+        device_name:
+          type: string
+        client_name:
+          type: string
+        client_version:
+          type: string
+        last_used_at:
+          type: string
+          format: date-time
+        expires_at:
+          type: string
+          format: date-time
+    SessionResponse:
+      type: object
+      required: [auth_session_id, user]
+      properties:
+        auth_session_id:
+          type: string
+          format: uuid
+        user:
+          $ref: '#/components/schemas/MobileUser'
+        session:
+          $ref: '#/components/schemas/SessionDevice'
+    MobileError:
+      type: object
+      required: [code, message, request_id, retryable]
+      properties:
+        code:
+          type: string
+          enum:
+            - INVALID_ARGUMENT
+            - INVALID_CREDENTIALS
+            - TOKEN_EXPIRED
+            - SESSION_REVOKED
+            - ACCOUNT_DISABLED
+            - ACCOUNT_EXPIRED
+            - PERMISSION_DENIED
+            - PROFILE_PIN_REQUIRED
+            - RATE_LIMITED
+            - UPSTREAM_UNAVAILABLE
+            - TRANSCODE_BUSY
+            - PLAYBACK_SESSION_NOT_FOUND
+            - RESOURCE_EXPIRED
+            - PROGRESS_CONFLICT
+            - SERVICE_UNAVAILABLE
+        message:
+          type: string
+        request_id:
+          type: string
+        retryable:
+          type: boolean
+        retry_after_sec:
+          type: integer
+          minimum: 0
+        details:
+          description: 可选的稳定结构化细节，未定义时客户端必须忽略。

docs/reader-plan.md

@@ -38,7 +38,7 @@ web/src/
   components/reader/
 ```
 
-**基建复用**：`internal/helper/http.go`（浏览器 UA + 代理回退 HTTP 客户端）、`internal/service/runtime_cache.go`（正文/目录/搜索缓存，内存+Redis）、`internal/service/image_proxy*`（封面与漫画图片代理）、`internal/handler/ws.go` 的 WSHub（搜索进度、追更任务推送，新增 `reader:*` topic）。
+**基建复用**：`internal/helper/http.go`（浏览器 UA + 代理回退 HTTP 客户端）、`internal/service/runtime_cache.go`（影视侧 JSON/对象缓存）、`internal/service/image_proxy*`（封面与漫画图片代理）、`internal/handler/ws.go` 的 WSHub（搜索进度、追更任务推送，新增 `reader:*` topic）。
 
 **数据流**：书源 JSON 存库 → 搜索/发现时按启用的源并发抓取（errgroup + 信号量限流，超时熔断）→ 结果聚合 → 前端。正文、播放地址、图片列表由服务端组装（含 `nextContentUrl` 翻页合并）后带 TTL 缓存下发；音频流与漫画图片按需经服务端代理补 UA/Referer 头。
 
@@ -126,8 +126,31 @@ web/src/
 | P4 漫画/图片源 ✅ | 图片列表绝对化 + 经签名代理（带书源 Referer 防盗链头）+ 漫画阅读器（上下滚动/左右单页双模式、图片懒加载与加载失败占位、点击分区翻页/呼菜单、菜单进度条按图片序号、进度按图片序号记忆、下一章预取）+ imageStyle 透传 | 漫画源可看 |
 | P4.5 书源登录 ✅ | `jsLib` 一次装载（对应 legado SharedJsScope）+ `source.*` 会话方法（getVariable/setVariable/getLoginInfo/putLoginInfo/getLoginHeader/putLoginHeader/get/put）+ `cookie.*`（getCookie/setCookie/replaceCookie/removeCookie/getKey，按 eTLD+1 隔离）+ 请求自动携带 Cookie 与 loginHeader + `loginUrl`/`loginUi`（解析表单 → 按钮 action 拼在 loginUrl 后执行 → result 为表单值）+ `loginCheckJs`（会话失效自动重登/重取）+ 源变量落库 + 登录信息/Cookie 加密存储 + 服务端 toast/startBrowser 回传前端 + 登录面板与变量编辑器 | 登录类书源可登录、可留存登录态 |
 | P4.6 本地书籍 ✅ | `POST /api/reader/local/books` 上传 TXT / EPUB（上限 64MB）→ 落盘 `data/reader/local/<bookID>.<txt\|epub>` + 解析目录入 `reader_chapters` + 落库为 `origin=""`、`is_local=true` 的书架条目；TXT 自动识别 BOM/UTF-8/GBK/Big5/UTF-16 并按 legado 默认 TXT 目录规则切章（RE2 无 lookbehind，改行首锚定 + 句子启发式过滤），章定位信息存字节区间 `start:end`，读章只读该区间；EPUB 走 container.xml → OPF spine，标题优先取 NCX/NAV，正文去标签与实体；移出书架同步删落盘文件；同名重复导入覆盖更新并尽量保留进度 | 本地书可上传、可读、可删 |
+| P4.10 书源按用户独立 ✅ | 书源从全局唯一改为按用户独立：`ReaderBookSource` 增加 `user_id`，唯一键改为 `(user_id, source_url)`；导入/列表/启停/删除/搜索全部按当前用户限定；老库迁移自动删旧唯一索引、按「谁书架上有这本书」回填归属并给多引用用户复制副本、清理软删历史行；删除改为物理删除（软删会占住唯一键导致「删掉再导入」失败）；正文缓存键随之改为「书源行 ID + 书本地址」，不同用户改过规则的同名书源不再共享缓存 | 用户的启停/规则/变量/删除互不影响 |
+| P4.7 正文持久缓存 ✅ | 服务端正文持久缓存（`reader_content_cache.go`：书源侧产物 + 索引落库 + 内容落盘 `cache_dir/reader-content/`、TTL/容量 LRU、目录刷新 remap、换源/移出书架清理、读穿透 singleflight）+ 批量取正文接口 `POST /api/reader/books/:id/content-batch`（对应 CacheBook 协议）+ 前端窗口预取（默认 3 章） | 慢源连续翻章不再每章等待；重复阅读零网络 |
+| P4.8 图片/字体兼容 ✅ | `coverDecodeJs`（封面解密代理，含搜索结果未入库场景）/ `ruleContent.imageDecode`（正文图片解密）+ 图片 URL 尾部 `,{headers}` options 逐图应用（options 优先于书源 header 与 Cookie）+ `java.queryTTF` / `queryBase64TTF` / `replaceFont`（sfnt cmap 0/4/6、loca 短/长、glyf 简单+复合字形） | 加密图与字体混淆正文可读 |
+| P4.9 规则稳定性 ✅ | `@put` 回写书源变量（修复跨请求丢失）；`book.getVariable/putVariable` 真正注入书籍上下文并落库（对应 Book.upVariable）；全部书源 `regexp2` 统一 3s 匹配超时；解压输出 32MB 上限；非 UTF-8 TXT 托管副本按 UTF-8 落盘（外部引用读时解码）；换源单事务；JS `cache` 按书源命名空间隔离并落盘；HLS 双端识别（服务端 `#EXTM3U` 嗅探 + `hls` 标志下发） | 与阅读 App 行为对齐，坏源不再拖死服务 |
 | P5 体验完善 | 换源（ChangeBookSourceDialog 四档排序）、追更（定时刷新目录 + 缓存清理）、发现页（exploreUrl 标签条）、阅读器高级设置（页眉页脚提示、点击区域自定义）、书源编辑器六 Tab、备份导出 | 完整体验 |
 
+### 实施记录：书源会话状态仍是跨用户共享（下一步）
+
+书源本身已按用户独立，但 `ReaderSourceState`（Cookie / 登录信息 / loginHeader / 源变量）
+仍以 `source_url` 为唯一键、跨用户共享一份。两个用户导入同一书源时：
+
+- 一方登录后，另一方复用同一份 Cookie；一方的登出会清掉另一方的登录态。
+
+彻底隔离需要给状态表也加 `user_id`（或按书源行 ID 组织），涉及登录面板与变量读写
+的一批调用点，留作单独一轮处理。
+
+### 实施记录：关于「宽松 @put 触发 panic」的复核
+
+前期评估曾报告 `sourcerule.go` 的宽松 `@put` 回退正则含 RE2 不支持的反向引用、可能 panic。
+逐行复核后该结论**不成立**：`splitPutRule` 的下标全部由固定捕获分组数保证。
+真实缺陷是另外两个并已修复：
+
+- `AnalyzeRule.Put` 没有 `sourcePutter` 分支，`@put` 只写进一次性的 `bookVars`，跨请求丢失；
+- `applyBookContext` 的三处调用点都在传 `book=nil`，`book.getVariable/putVariable` 与 `book.name` 长期是死代码。
+
 P0–P2 是主体（约全部工作量 60–70%），P3/P4 相对独立可并行。
 
 ## 8. 风险与对策

docs/reader-ui-spec.md

@@ -34,7 +34,9 @@
 - 排序六档，对齐 legado `AppConfig.getBookSortByGroupId`：最近阅读（dur_chapter_time，默认）/ 最近更新（latest_chapter_time）/ 综合 / 按书名 / 按作者 / 手动顺序（order）。顶栏有快捷排序下拉，弹窗里也可选。
 - 显示项开关：未读章数徽标、更新时间。
 - 「更新目录」（对应 legado `menu_update_toc`）：`POST /reader/shelf/refresh-toc` 并发重抓书架内网络书籍的目录，覆盖章节缓存；末章标题变化时刷新 `latest_chapter_time`，用于「最近更新」排序与更新时间展示。本地书籍与无书源信息的书跳过。返回 `total/updated/unchanged/failed` 四档——抓到但章数没变（完结书）记 `unchanged`「已是最新」，只有抓取或写入真的失败才记 `failed`，避免把正常结果报成「更新失败」；失败会打 Warn 日志（含书名与书源）。
-- 未实现（与 legado 的差距）：书籍二级分组网格（进入分组后的封面网格）、导出/导入书架、离线下载。
+- 未实现（与 legado 的差距）：书籍二级分组网格（进入分组后的封面网格）、导出/导入书架、离线下载管理界面（服务端批量缓存接口与窗口预取已可用，见下）。
+- 章节预取：阅读页对当前章之后默认 3 章走 `POST /reader/books/:id/content-batch` 批量抓取（服务端并发 + 持久缓存），翻到后续章直接命中；单章串行预取在高延迟书源上赶不上连续翻章。
+- 书源按用户独立：书源管理（列表/导入/启停/删除）与搜索都只作用于当前用户自己的书源。同一份书源不同用户可以各导入一份，各自启停、排序、改规则与变量，互不可见；Web 端无需额外交互，接口按登录用户自动隔离。
 
 **书架分组（`/reader/book-groups`，仿影视模块的媒体库标签）**
 - 按用户存服务端：`reader_book_groups` 表每个用户一条，`groups` 列是 `[{name, book_ids}]` 的 JSON。结构、语义与影视的媒体库标签（`User.LibraryTags`）同构——组名 → 成员 ID、整份替换、一个成员只归一个组、组内顺序即展示顺序。
@@ -103,6 +105,8 @@
 - 漫画图片显示尺寸（`utils/comicImageFit.ts`，仅上下滚动模式）：legado 的漫画阅读有「缩放」，Web 版原先只有一种写死的宽度（正文列封顶 900px），桌面端放不大也缩不小，所以补上一组档位，在界面面板的「图片尺寸」一行切换。`default` 就是老样子（900px 居中），`width` 适应宽度（正文列不再封顶、铺满窗口），`height` 适应高度（一屏一页），`long` 适应长边（整页完整可见），`original` 原图（原始像素 1:1，超出部分横向滚动）。`default`/`width` 由外层列宽决定，其余三个由 `<img>` 自身约束，**所以后三种必须放开 900px 列宽上限**，否则会被列再压回去。`height`/`long` 要按「一屏多高」换算，所以量的是滚动容器本身而不是 `window.innerHeight`（正文区是 root 里的 `flex-1`，另挂上下条之后就不等于窗口高度了），并用 `ResizeObserver` 跟随；只在启用了自尺寸档位时才挂观察器，默认档位不白白重渲染整章。`settings.comicImageFit` 是设备级偏好（不同屏幕和源分辨率合适的尺寸不同），和 `comicDoublePage` 一样只存本机、不参与账号同步。翻页模式是整页缩放进视口，本来就不存在「太大/太小」，档位对它不生效、也不显示入口。`ctrl/cmd+滚轮` 依然留给浏览器缩放，本功能只用档位做粗调。
 - **文本型漫画源按图片下发**（`internal/service/reader` 的 `imageMarkersOnly`）：拷贝漫画这类书源 `bookSourceType=0`（文本），正文规则直接给 `<img>`，服务端把整行标签转成 `[img]<签名地址>` 标记行后类型仍是 `text`，前端就会走文本阅读器——分页把每张图当成一列，一屏只看得到一张，桌面端也谈不上双页铺开。现在 `GetContentForBook` / `LocalChapterContent` 在标记化之后判断「非空行全部是 `[img]` 标记」，是则把 `type` 改成 `image` 并给出 `images`，交由漫画阅读器渲染（整页缩放、双页铺开、进度按图片序号）。判定只认「全是标记」：混了正文的章节一律保持 `text`，孤立的 HTML 标签行（`<div>`/`</div>`）与空行当作无内容忽略，绝不吞掉可读文字。
 - 鼠标滚轮翻页（仅翻页模式）：向上滚=上一页，向下滚=下一页；菜单打开时也不翻页。鼠标滚轮一格一页（间隔至少 220ms，与翻页动画对齐），触控板小步长累计到阈值翻一页且一次手势只翻一页（避免惯性连翻）。`ctrl/cmd+滚轮` 保留浏览器缩放。
+- **浏览器全屏（沉浸式）**：阅读页本身已经是 `fixed inset-0` 的独立布局（`/reader/*` 不套影视 Layout），所以屏幕上的留白只剩浏览器自带的地址栏/工具栏。底部动作行加「全屏 / 还原」，对 `readerRef` 调标准 Fullscreen API（`requestFullscreen` / `exitFullscreen`），进全屏前先收起菜单。按钮只在 `document.fullscreenEnabled === true` 时出现——**iOS 上的 Safari 至今不支持元素全屏**（只有 `<video>` 能全屏），所以那里不显示按钮，而不是显示一个点了没反应的死按钮；iPhone 想彻底去掉浏览器界面只能「添加到主屏幕」。离开阅读页时卸载 effect 主动 `exitFullscreen`，否则返回书架后浏览器仍停在全屏、整站都被罩住。全屏状态由 `fullscreenchange` 事件回写，不做乐观更新（用户按 Esc / 系统手势退出时也要跟着变）。
+- **手机端双击中间区域进出全屏**（`hooks/useDoubleTap.ts` + `hooks/useIsTouchDevice.ts`）：中间区域单击本来就是呼出菜单，现在双击再切一次全屏，两个动作在同一块屏幕上，得先等一小会儿看有没有第二下。`useDoubleTap` 把这段窗口做成纯函数 `decideDoubleTap`（第一下进 `tap` 窗口等第二下；第二下到达取消单击、改判双击），**双击回调在第二次点击的事件里同步执行**——浏览器只认用户手势上下文里的 `requestFullscreen`，挪进定时器再调会被直接拒绝。只在「触摸设备（`(hover: none)`）+ 支持元素全屏」时启用：桌面端根本不装这套，单击立刻生效，点中间呼出菜单的手感与以前完全一致；iOS 也不装（它不支持元素全屏）。三条中间点击路径（翻页模式的三分区覆盖层、文本滚动模式的 `handleZoneTap`、漫画滚动模式的 `onZone`）统一走 `centerTap()`，左右分区点击会 `cancel()` 掉待判定的单击，免得点完翻页又弹出菜单。菜单打开时整屏遮罩先吃掉那次点击，遮罩在中间区域关闭菜单的同时 `arm()` 一个双击窗口，「双击中间切全屏」在菜单开着时也成立。手机端再给阅读根节点挂 `touch-action: manipulation`，关掉浏览器自带的双击缩放（纵向滚动与双指缩放不受影响），避免同一手势被浏览器抢着缩一次。
 - 目录：整屏面板（顶部返回 + 书名 + 章数，Virtuoso 虚拟列表，定位并高亮当前章，点章跳转）。**必须渲染在底部菜单之外**：菜单带 `backdrop-blur`，会成为 `fixed` 后代的包含块，放里面 `h-full` 只能拿到菜单高度；历史上它写的是 `top-0 + bottom-full`，两者同时存在时高度被算成 0，整块目录完全看不见。
 
 **本地书籍（对应 legado 本地 TXT / EPUB）**

internal/config/defaults.go

@@ -33,6 +33,7 @@ func setDefaults(v *viper.Viper) {
 	v.SetDefault("database.cache_size", -40000)
 	v.SetDefault("database.max_open_conns", defaultDatabaseMaxOpenConns)
 	v.SetDefault("database.max_idle_conns", defaultDatabaseMaxIdleConns)
+	v.SetDefault("database.postgres_trgm_index", true)
 
 	v.SetDefault("secrets.jwt_secret", "")
 
@@ -52,6 +53,9 @@ func setDefaults(v *viper.Viper) {
 	v.SetDefault("cache.redis_prefix", "mebox")
 	v.SetDefault("cache.media_ttl_seconds", 90)
 	v.SetDefault("cache.emby_latest_ttl_seconds", 300)
+	v.SetDefault("cache.reader_content_max_size_mb", 1024)
+	v.SetDefault("cache.reader_content_ttl_hours", 168)
+	v.SetDefault("cache.reader_files_ttl_hours", 720)
 
 	v.SetDefault("search.backend", "")
 	v.SetDefault("search.opensearch_url", "")

internal/config/normalize.go

@@ -62,6 +62,15 @@ func (c *Config) normalize() error {
 	if c.Cache.MediaTTLSeconds < 1 {
 		c.Cache.MediaTTLSeconds = 90
 	}
+	if c.Cache.ReaderContentMaxSizeMB < 0 {
+		c.Cache.ReaderContentMaxSizeMB = 0
+	}
+	if c.Cache.ReaderContentTTLHours < 0 {
+		c.Cache.ReaderContentTTLHours = 0
+	}
+	if c.Cache.ReaderFilesTTLHours < 0 {
+		c.Cache.ReaderFilesTTLHours = 0
+	}
 	c.Search.Backend = strings.ToLower(strings.TrimSpace(c.Search.Backend))
 	if c.Search.Index == "" {
 		c.Search.Index = "mebox_media"

internal/config/types.go

@@ -50,7 +50,8 @@ type AppConfig struct {
 	DataDir string `mapstructure:"data_dir"`
 	WebDir  string `mapstructure:"web_dir"`
 	// HTTPSEnabled 是否仅通过 HTTPS 提供访问。启用时必须同时配置
-	// SSLCert / SSLKey（或 SSLCertPath / SSLKeyPath），保存后服务会热切换到 HTTPS。
+	// SSLCert / SSLKey（或 SSLCertPath / SSLKeyPath），保存后服务会热切换到 HTTPS；
+	// 同一端口上的明文 HTTP 请求会被跳转到 HTTPS，而不是直接拒绝。
 	HTTPSEnabled bool `mapstructure:"https_enabled"`
 	// SSLCert 是 PEM 编码的 SSL 证书内容。
 	SSLCert string `mapstructure:"ssl_cert"`
@@ -86,6 +87,10 @@ type DatabaseConfig struct {
 	CacheSize    int    `mapstructure:"cache_size"`
 	MaxOpenConns int    `mapstructure:"max_open_conns"`
 	MaxIdleConns int    `mapstructure:"max_idle_conns"`
+	// PostgresTrgmIndex 决定是否用 pg_trgm 的 GIN 三元组索引替代 SQLite 的
+	// FTS5 全文索引。开启后 ILIKE '%term%' 搜索能走索引而不是整表扫描，代价是
+	// media 表写入时要多维护 4 个 GIN 索引。仅对 PostgreSQL 生效。
+	PostgresTrgmIndex bool `mapstructure:"postgres_trgm_index"`
 }
 
 // SecretsConfig 保存 JWT / 第三方 API 密钥（不要提交值）。
@@ -133,6 +138,13 @@ type CacheConfig struct {
 	// 并发），缓存过短会让这批请求同时穿透并各自重建 payload，在低配主机
 	// 上造成秒级延迟。默认 300 秒，新入库内容最迟 5 分钟后出现在最新列表。
 	EmbyLatestTTLSeconds int `mapstructure:"emby_latest_ttl_seconds"`
+	// ReaderContentMaxSizeMB 阅读正文持久缓存的总容量（MB），0 表示不限制。
+	ReaderContentMaxSizeMB int `mapstructure:"reader_content_max_size_mb"`
+	// ReaderContentTTLHours 阅读正文缓存的保留时长（小时），0 表示不过期。
+	ReaderContentTTLHours int `mapstructure:"reader_content_ttl_hours"`
+	// ReaderFilesTTLHours 书源文件缓存（java.cacheFile / downloadFile）的保留时长（小时）。
+	// 0 表示使用内置兜底值（30 天）。
+	ReaderFilesTTLHours int `mapstructure:"reader_files_ttl_hours"`
 }
 
 type SearchConfig struct {

internal/database/compatibility_test.go

@@ -0,0 +1,238 @@
+package database
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/stdlib"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// PostgreSQL tests use a disposable schema, never the caller's existing tables.
+// Set MEBOX_TEST_POSTGRES_DSN to include a real PostgreSQL server in local runs.
+func compatibilityDB(t *testing.T, dialect string) *gorm.DB {
+	t.Helper()
+	var db *gorm.DB
+	if dialect == "sqlite" {
+		cfg := &config.Config{}
+		cfg.Database.Type = dialect
+		cfg.Database.DBPath = filepath.Join(t.TempDir(), "test.db")
+		cfg.Database.WALMode = true
+		cfg.Database.BusyTimeout = 5000
+		cfg.Database.MaxOpenConns = 8
+		var err error
+		db, err = Open(cfg, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+	} else {
+		dsn := os.Getenv("MEBOX_TEST_POSTGRES_DSN")
+		if dsn == "" {
+			t.Skip("set MEBOX_TEST_POSTGRES_DSN to run PostgreSQL integration tests")
+		}
+		pgcfg, err := pgx.ParseConfig(dsn)
+		if err != nil {
+			t.Fatal("invalid PostgreSQL test configuration")
+		}
+		admin := stdlib.OpenDB(*pgcfg)
+		t.Cleanup(func() { _ = admin.Close() })
+		schemaName := "mebox_test_" + strings.ReplaceAll(uuid.NewString(), "-", "")
+		if _, err := admin.Exec("CREATE SCHEMA " + quoteIdent(schemaName)); err != nil {
+			t.Fatal(err)
+		}
+		t.Cleanup(func() {
+			if _, err := admin.Exec("DROP SCHEMA " + quoteIdent(schemaName) + " CASCADE"); err != nil {
+				t.Error(err)
+			}
+		})
+		pgcfg.RuntimeParams["search_path"] = schemaName + ",public"
+		conn := stdlib.OpenDB(*pgcfg)
+		t.Cleanup(func() { _ = conn.Close() })
+		db, err = gorm.Open(postgres.New(postgres.Config{Conn: conn}), &gorm.Config{})
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	db.Logger = logger.Default.LogMode(logger.Silent)
+	if conn, err := db.DB(); err == nil {
+		t.Cleanup(func() { _ = conn.Close() })
+	}
+	if err := AutoMigrate(db); err != nil {
+		t.Fatal(err)
+	}
+	return db
+}
+
+func TestDatabaseCompatibility(t *testing.T) {
+	for _, dialect := range []string{"sqlite", "postgres"} {
+		t.Run(dialect, func(t *testing.T) {
+			t.Run("long_paths_and_restart", func(t *testing.T) {
+				db := compatibilityDB(t, dialect)
+				// Distinct CJK characters prevent TOAST compression from hiding
+				// the PostgreSQL btree entry size limit (> 2704 bytes).
+				var path strings.Builder
+				path.WriteString("/media/")
+				for i := range 980 {
+					path.WriteRune(rune(0x4e00 + i))
+				}
+				path.WriteString(".mkv")
+				media := model.Media{Path: path.String(), Title: "Long path"}
+				if err := db.Create(&media).Error; err != nil {
+					t.Fatalf("insert long media path: %v", err)
+				}
+				if err := db.Create(&model.Media{Path: media.Path}).Error; err == nil {
+					t.Fatal("duplicate path accepted")
+				}
+				if err := AutoMigrate(db); err != nil {
+					t.Fatalf("migrate existing database: %v", err)
+				}
+				var found model.Media
+				if err := db.Where("path = ?", media.Path).First(&found).Error; err != nil {
+					t.Fatalf("lookup long path: %v", err)
+				}
+			})
+			if dialect == "postgres" {
+				t.Run("upgrade_legacy_path_indexes", func(t *testing.T) {
+					db := compatibilityDB(t, dialect)
+					for _, unique := range []string{"UNIQUE ", ""} {
+						if err := db.Exec("DROP INDEX idx_media_path").Error; err != nil {
+							t.Fatal(err)
+						}
+						if err := db.Exec("CREATE " + unique + "INDEX idx_media_path ON media(path)").Error; err != nil {
+							t.Fatal(err)
+						}
+						for range 2 {
+							if err := ensureMediaPathIndex(db); err != nil {
+								t.Fatal(err)
+							}
+						}
+						isUnique, method, found, err := postgresIndexProperties(db, "idx_media_path")
+						if err != nil || !found || isUnique || method != "hash" {
+							t.Fatalf("legacy index not upgraded: unique=%v method=%s found=%v err=%v", isUnique, method, found, err)
+						}
+					}
+				})
+			}
+			t.Run("search_ranking", func(t *testing.T) {
+				db := compatibilityDB(t, dialect)
+				// Exercise LIKE fallback in both engines.
+				if dialect == "sqlite" {
+					resetMediaSearchIndex(db)
+				}
+				for i, title := range []string{"The Alpha story", "Alpha sequel", "Alpha"} {
+					row := model.Media{Base: model.Base{ID: fmt.Sprintf("m-%d", i), CreatedAt: time.Now().Add(time.Duration(i) * time.Minute)}, Title: title, Path: fmt.Sprintf("/media/%d.mkv", i)}
+					if err := db.Create(&row).Error; err != nil {
+						t.Fatal(err)
+					}
+				}
+				items, total, err := repository.New(db).Media.SearchFilteredPage(t.Context(), "Alpha", 0, 10, repository.MediaQueryFilter{IncludeNSFW: true})
+				if err != nil {
+					t.Fatal(err)
+				}
+				if total != 3 || len(items) != 3 || items[0].Title != "Alpha" || items[1].Title != "Alpha sequel" {
+					t.Fatalf("unexpected search ranking: total=%d, items=%v", total, items)
+				}
+			})
+			t.Run("concurrent_media_upsert", func(t *testing.T) {
+				db := compatibilityDB(t, dialect)
+				repo := repository.New(db).Media
+				const workers = 8
+				// Synchronize the initial lookups to force the insert race.
+				var lookups sync.WaitGroup
+				lookups.Add(workers)
+				if dialect == "postgres" {
+					if err := db.Callback().Query().After("gorm:after_query").Register("test:insert_race", func(tx *gorm.DB) {
+						if tx.Statement.Table == "media" && tx.Error == gorm.ErrRecordNotFound {
+							lookups.Done()
+							lookups.Wait()
+						}
+					}); err != nil {
+						t.Fatal(err)
+					}
+				}
+				ctx, cancel := context.WithTimeout(t.Context(), 15*time.Second)
+				defer cancel()
+				errs := make(chan error, workers)
+				for range workers {
+					go func() { errs <- repo.Upsert(ctx, &model.Media{Path: "/media/shared.mkv", Title: "Shared"}) }()
+				}
+				for range workers {
+					if err := <-errs; err != nil {
+						t.Errorf("concurrent upsert: %v", err)
+					}
+				}
+				var count int64
+				if err := db.Model(&model.Media{}).Count(&count).Error; err != nil || count != 1 {
+					t.Fatalf("media count=%d, err=%v", count, err)
+				}
+			})
+			t.Run("search_filters", func(t *testing.T) {
+				db := compatibilityDB(t, dialect)
+				rows := []model.Media{
+					{Base: model.Base{ID: "keep"}, LibraryID: "lib-1", Genres: "Action", Year: 2020, Rating: 8},
+					{Base: model.Base{ID: "other-library"}, LibraryID: "lib-2", Genres: "Action", Year: 2020, Rating: 8},
+					{Base: model.Base{ID: "other-genre"}, LibraryID: "lib-1", Genres: "Comedy", Year: 2020, Rating: 8},
+					{Base: model.Base{ID: "too-old"}, LibraryID: "lib-1", Genres: "Action", Year: 1990, Rating: 8},
+					{Base: model.Base{ID: "too-new"}, LibraryID: "lib-1", Genres: "Action", Year: 2026, Rating: 8},
+					{Base: model.Base{ID: "low-rating"}, LibraryID: "lib-1", Genres: "Action", Year: 2020, Rating: 2},
+					{Base: model.Base{ID: "watched"}, LibraryID: "lib-1", Genres: "Action", Year: 2020, Rating: 8},
+				}
+				for i := range rows {
+					rows[i].Title = "Alpha " + rows[i].ID
+					rows[i].Path = "/media/" + rows[i].ID + ".mkv"
+					if err := db.Create(&rows[i]).Error; err != nil {
+						t.Fatal(err)
+					}
+				}
+				if err := db.Create(&model.PlaybackHistory{UserID: "viewer", MediaID: "watched", Completed: true}).Error; err != nil {
+					t.Fatal(err)
+				}
+				items, total, err := repository.New(db).Media.SearchFilteredPage(t.Context(), "alpha", 0, 10, repository.MediaQueryFilter{
+					IncludeNSFW: true, LibraryID: "lib-1", Genres: []string{"Action"}, YearMin: 2000, YearMax: 2025, RatingMin: 5,
+					UnwatchedOnly: true, UnwatchedUserID: "viewer",
+				})
+				if err != nil {
+					t.Fatal(err)
+				}
+				if total != 1 || len(items) != 1 || items[0].ID != "keep" {
+					t.Fatalf("search ignored filters: total=%d, items=%v", total, items)
+				}
+			})
+			t.Run("migration_preserves_zero_values", func(t *testing.T) {
+				src := compatibilityDB(t, "sqlite")
+				dst := compatibilityDB(t, dialect)
+				user := model.User{Username: "disabled", PasswordHash: "hash"}
+				if err := src.Create(&user).Error; err != nil {
+					t.Fatal(err)
+				}
+				if err := src.Model(&user).Updates(map[string]any{"is_active": false, "hide_adult": false, "player_volume": 0, "danmaku_enabled": false}).Error; err != nil {
+					t.Fatal(err)
+				}
+				if _, _, err := copyModelTables(src, dst, 500); err != nil {
+					t.Fatal(err)
+				}
+				var got model.User
+				if err := dst.First(&got, "id = ?", user.ID).Error; err != nil {
+					t.Fatal(err)
+				}
+				if got.IsActive || got.HideAdult || got.PlayerVolume != 0 || got.DanmakuEnabled {
+					t.Fatalf("migration replaced stored zero values: active=%v hide_adult=%v volume=%v danmaku=%v", got.IsActive, got.HideAdult, got.PlayerVolume, got.DanmakuEnabled)
+				}
+			})
+		})
+	}
+}

internal/database/database_admin.go

@@ -165,7 +165,7 @@ func MigrateCurrentToPostgres(src *gorm.DB, targetDSN string, batchSize int, log
 	}
 
 	// 1. 初始化目标库 Schema、类型与索引
-	if err := AutoMigrate(targetDB); err != nil {
+	if err := AutoMigrateWithConfig(targetDB, nil, log); err != nil {
 		return nil, fmt.Errorf("auto migrate target PostgreSQL: %w", err)
 	}
 

internal/database/persisted_rows.go

@@ -0,0 +1,50 @@
+package database
+
+import (
+	"fmt"
+	"reflect"
+
+	"gorm.io/gorm"
+)
+
+// InsertPreservingValues copies persisted model rows without applying creation
+// hooks or defaults. Struct CreateInBatches treats false, 0 and empty strings as
+// missing values, which would reactivate disabled accounts during migration or
+// restore. Column maps preserve the exact values already stored in the source.
+func InsertPreservingValues(db *gorm.DB, rows any, batchSize int) error {
+	stmt := &gorm.Statement{DB: db}
+	if err := stmt.Parse(rows); err != nil {
+		return err
+	}
+	slice := reflect.Indirect(reflect.ValueOf(rows))
+	if slice.Kind() != reflect.Slice {
+		return fmt.Errorf("persisted rows must be a slice, got %T", rows)
+	}
+	if len(stmt.Schema.DBNames) == 0 {
+		return fmt.Errorf("persisted rows have no database columns")
+	}
+	values := make([]map[string]any, 0, slice.Len())
+	for i := 0; i < slice.Len(); i++ {
+		row := make(map[string]any, len(stmt.Schema.DBNames))
+		for _, name := range stmt.Schema.DBNames {
+			field := stmt.Schema.FieldsByDBName[name]
+			if field.Creatable {
+				row[name], _ = field.ValueOf(db.Statement.Context, slice.Index(i))
+			}
+		}
+		values = append(values, row)
+	}
+	if len(values) == 0 {
+		return nil
+	}
+	// Bound batches by each engine's bind-parameter limit.
+	parameterLimit := 65535
+	if isSQLite(db) {
+		parameterLimit = 32766
+	}
+	maxBatch := parameterLimit / len(stmt.Schema.DBNames)
+	if batchSize <= 0 || batchSize > maxBatch {
+		batchSize = maxBatch
+	}
+	return db.Table(stmt.Schema.Table).CreateInBatches(values, batchSize).Error
+}

internal/database/reader_source_migration_test.go

@@ -0,0 +1,141 @@
+package database
+
+import (
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// legacyReaderSource 旧版书源结构（全局唯一，没有 user_id）。
+type legacyReaderSource struct {
+	ID             string `gorm:"primaryKey"`
+	CreatedAt      time.Time
+	UpdatedAt      time.Time
+	DeletedAt      gorm.DeletedAt `gorm:"index"`
+	Name           string
+	SourceURL      string `gorm:"type:varchar(512);uniqueIndex"`
+	RawJSON        string
+	Enabled        bool
+	EnabledExplore bool
+	Variables      string
+	Header         string
+}
+
+func (legacyReaderSource) TableName() string { return "reader_book_sources" }
+
+// 迁移路径：老库（书源全局唯一、无 user_id）升级后
+//  1. 旧唯一索引被删除，两个用户可以各持一份同 URL 的书源副本；
+//  2. 书源按「谁书架上有这本书」回填归属，多个引用者各得一份副本；
+//  3. 软删的历史书源行被清理，删除后重新导入不再撞唯一键。
+func TestReaderSourceMigrationBackfill(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(filepath.Join(t.TempDir(), "legacy.db")), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Windows 上 sqlite 文件句柄会阻塞 TempDir 清理，测试结束前先关连接。
+	t.Cleanup(func() {
+		if sqlDB, err := db.DB(); err == nil {
+			_ = sqlDB.Close()
+		}
+	})
+	// 造老结构：只有书源表（带旧唯一索引），书籍表用当前模型建。
+	if err := db.AutoMigrate(&legacyReaderSource{}, &model.ReaderBook{}); err != nil {
+		t.Fatal(err)
+	}
+	shared := &legacyReaderSource{ID: "legacy-1", Name: "共享源", SourceURL: "https://shared.example.com", Enabled: true}
+	if err := db.Create(shared).Error; err != nil {
+		t.Fatal(err)
+	}
+	softDeleted := &legacyReaderSource{ID: "legacy-2", Name: "已删源", SourceURL: "https://gone.example.com"}
+	if err := db.Create(softDeleted).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Delete(softDeleted).Error; err != nil { // 旧版 DeleteSource 的软删
+		t.Fatal(err)
+	}
+	// u1 两本、u2 一本都引用共享源；孤儿源无人引用。
+	books := []model.ReaderBook{
+		{UserID: "u1", Origin: "https://shared.example.com", BookURL: "https://shared.example.com/b/1", Name: "书1"},
+		{UserID: "u1", Origin: "https://shared.example.com", BookURL: "https://shared.example.com/b/2", Name: "书2"},
+		{UserID: "u2", Origin: "https://shared.example.com", BookURL: "https://shared.example.com/b/1", Name: "书1"},
+		{UserID: "u2", Origin: "https://orphan.example.com", BookURL: "https://orphan.example.com/b/1", Name: "孤儿"},
+	}
+	for i := range books {
+		if err := db.Create(&books[i]).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	// 迁移。
+	if err := dropLegacyReaderSourceUniqueIndex(db); err != nil {
+		t.Fatalf("删旧索引失败: %v", err)
+	}
+	if err := db.AutoMigrate(model.AllModels()...); err != nil {
+		t.Fatalf("AutoMigrate 失败: %v", err)
+	}
+	if err := backfillReaderSourceOwnership(db); err != nil {
+		t.Fatalf("回填失败: %v", err)
+	}
+
+	// 1. 旧唯一索引已删除：两个用户同 URL 各自一份。
+	var rows []model.ReaderBookSource
+	if err := db.Order("user_id ASC").Find(&rows).Error; err != nil {
+		t.Fatal(err)
+	}
+	byUser := map[string]model.ReaderBookSource{}
+	for _, r := range rows {
+		if r.SourceURL == "https://shared.example.com" {
+			byUser[r.UserID] = r
+		}
+	}
+	if len(byUser) != 2 {
+		t.Fatalf("共享源应有两份副本，实际 %d 份: %+v", len(byUser), byUser)
+	}
+	if byUser["u1"].ID == "" || byUser["u2"].ID == "" || byUser["u1"].ID == byUser["u2"].ID {
+		t.Fatalf("两份副本应有不同行 ID: u1=%q u2=%q", byUser["u1"].ID, byUser["u2"].ID)
+	}
+	if byUser["u1"].RawJSON != shared.RawJSON || byUser["u1"].Name != "共享源" {
+		t.Fatal("副本应保留原书源内容")
+	}
+	// 引用最多的用户保留原行（u1 有两本书）。
+	if byUser["u1"].ID != "legacy-1" {
+		t.Fatalf("原行应归引用最多的用户，实际 %q", byUser["u1"].ID)
+	}
+
+	// 2. 软删的历史行被清理。
+	var softLeft int64
+	if err := db.Unscoped().Model(&model.ReaderBookSource{}).
+		Where("source_url = ?", "https://gone.example.com").Count(&softLeft).Error; err != nil {
+		t.Fatal(err)
+	}
+	if softLeft != 0 {
+		t.Fatalf("软删的历史书源应被清理，剩余 %d 行", softLeft)
+	}
+
+	// 3. 无人引用的书源保持无归属（不会凭空分配给谁）。
+	var orphans int64
+	if err := db.Model(&model.ReaderBookSource{}).
+		Where("source_url = ? AND user_id <> ''", "https://orphan.example.com").Count(&orphans).Error; err != nil {
+		t.Fatal(err)
+	}
+	if orphans != 0 {
+		t.Fatal("无人引用的书源不应被分配归属")
+	}
+
+	// 4. 回填是幂等的（再次执行不产生重复副本）。
+	if err := backfillReaderSourceOwnership(db); err != nil {
+		t.Fatal(err)
+	}
+	var total int64
+	if err := db.Model(&model.ReaderBookSource{}).Where("source_url = ?", "https://shared.example.com").Count(&total).Error; err != nil {
+		t.Fatal(err)
+	}
+	if total != 2 {
+		t.Fatalf("重复回填不应新增副本，实际 %d 份", total)
+	}
+}

internal/database/schema_migration.go

@@ -1,27 +1,52 @@
 package database
 
 import (
+	"fmt"
+	"strings"
+
+	"go.uber.org/zap"
 	"gorm.io/gorm"
 
+	"github.com/truewhile/MeBox/internal/config"
 	"github.com/truewhile/MeBox/internal/model"
 )
 
 // AutoMigrate creates tables for every model registered in the model package.
 func AutoMigrate(db *gorm.DB) error {
+	return AutoMigrateWithConfig(db, nil, nil)
+}
+
+// AutoMigrateWithConfig 与 AutoMigrate 相同，另外接受配置与日志：
+// 配置用来决定可选的 PostgreSQL 搜索索引，日志用来记录耗时步骤
+// （首次在已有大库上重建索引可能需要数十秒）。两者都可以为 nil。
+func AutoMigrateWithConfig(db *gorm.DB, cfg *config.Config, log *zap.Logger) error {
 	// 必须先于 AutoMigrate：旧库中可能已有重复的 (user_id, media_id) 历史行，
 	// 不去重会导致唯一索引 uniq_user_history 创建失败。
 	if err := dedupePlaybackHistories(db); err != nil {
 		return err
 	}
+	// 书源从「全局唯一」改成「按用户独立」：先删掉 source_url 上的旧唯一索引。
+	// AutoMigrate 只会按索引名创建新索引，不会删除已改名的旧唯一索引，留着它
+	// 第二个用户导入同一书源就会撞唯一约束。
+	if err := dropLegacyReaderSourceUniqueIndex(db); err != nil {
+		return err
+	}
 	if err := db.AutoMigrate(model.AllModels()...); err != nil {
 		return err
 	}
+	// 回填书源归属：老库的书源没有 user_id，按「谁书架上有这本书」分配或复制副本。
+	if err := backfillReaderSourceOwnership(db); err != nil {
+		return err
+	}
 	if err := ensurePostgresColumnCompatibility(db); err != nil {
 		return err
 	}
 	if err := ensurePerformanceIndexes(db); err != nil {
 		return err
 	}
+	if err := ensureMediaPathIndex(db); err != nil {
+		return err
+	}
 	if err := ensureLibraryRootsCompatibility(db); err != nil {
 		return err
 	}
@@ -34,6 +59,113 @@ func AutoMigrate(db *gorm.DB) error {
 		}
 		return ensureSQLiteQueryOptimizer(db)
 	}
+	return ensurePostgresSearchIndexes(db, cfg, log)
+}
+
+// ensureMediaPathIndex 建立 media.path 的唯一约束与等值查找索引。
+//
+// 模型上不再用 gorm:"uniqueIndex"（见 model.Media.Path 的注释）：PostgreSQL 的
+// btree 单条索引项上限是 2704 字节，varchar(1024) 在中文路径下可达 3072 字节，
+// 对整列建唯一索引会让这类行插入时报
+//
+//	index row size ... exceeds btree version 4 maximum 2704
+//
+// 所以 PostgreSQL 改用 md5(path) 的表达式唯一索引（定长 32 字节，永远塞得下），
+// 同时用 hash 索引 idx_media_path 加速 path = ? 等值查找；非唯一 btree
+// 也有索引项长度限制，不能继续对完整 path 建 btree。SQLite 沿用整列唯一索引。
+func ensureMediaPathIndex(db *gorm.DB) error {
+	if db == nil || !db.Migrator().HasTable("media") {
+		return nil
+	}
+	if !isPostgres(db) {
+		return db.Exec(`CREATE UNIQUE INDEX IF NOT EXISTS idx_media_path ON media(path)`).Error
+	}
+	// 先建哈希唯一索引：此时旧索引还在，唯一性不会出现空窗。
+	if err := db.Exec(`CREATE UNIQUE INDEX IF NOT EXISTS idx_media_path_hash ON media(md5(path))`).Error; err != nil {
+		return err
+	}
+	unique, method, found, err := postgresIndexProperties(db, "idx_media_path")
+	if err != nil {
+		return err
+	}
+	if found && (unique || method != "hash") {
+		if err := db.Exec(`DROP INDEX IF EXISTS idx_media_path`).Error; err != nil {
+			return err
+		}
+	}
+	return db.Exec(`CREATE INDEX IF NOT EXISTS idx_media_path ON media USING hash(path)`).Error
+}
+
+// postgresIndexProperties 返回当前 schema 下索引的唯一性与访问方法。
+func postgresIndexProperties(db *gorm.DB, indexName string) (unique bool, method string, found bool, err error) {
+	// 用指针接 bool：没有匹配行时 Scan 不报错，nil 即代表索引不存在。
+	var row struct {
+		IsUnique *bool
+		Method   string
+	}
+	if err := db.Raw(`
+SELECT i.indisunique AS is_unique, a.amname AS method
+FROM pg_class c
+JOIN pg_index i ON i.indexrelid = c.oid
+JOIN pg_namespace n ON n.oid = c.relnamespace
+JOIN pg_am a ON a.oid = c.relam
+WHERE n.nspname = current_schema() AND c.relname = ?
+`, indexName).Scan(&row).Error; err != nil {
+		return false, "", false, err
+	}
+	if row.IsUnique == nil {
+		return false, "", false, nil
+	}
+	return *row.IsUnique, row.Method, true, nil
+}
+
+// ensurePostgresSearchIndexes 给 PostgreSQL 补上 SQLite FTS5 的替代品。
+//
+// 全文检索只在 SQLite 下存在（FTS5 虚表 + 触发器），PostgreSQL 下
+// media_search_repository 会退回 title/original_name/path/genres 的 ILIKE
+// 全表扫描。pg_trgm 的 GIN 三元组索引能让这类 '%term%' 模式（≥3 字符）走索引，
+// 把搜索从整表扫描降到索引扫描。
+//
+// 之所以可关闭：media 表写入非常频繁（每次扫描批量入库），多 4 个 GIN 索引会
+// 明显放大写入成本。默认开启以对齐 SQLite 的搜索能力，写入压力大的部署可以关掉。
+//
+// 整个过程是尽力而为：没有建扩展的权限、Postgres 版本不支持等情况下只记一条
+// 警告并继续启动，绝不让一个搜索加速项把服务挡在门外。
+func ensurePostgresSearchIndexes(db *gorm.DB, cfg *config.Config, log *zap.Logger) error {
+	if !isPostgres(db) {
+		return nil
+	}
+	if cfg != nil && !cfg.Database.PostgresTrgmIndex {
+		if log != nil {
+			log.Info("postgres trigram search index disabled; media search falls back to sequential scan")
+		}
+		return nil
+	}
+	if err := db.Exec(`CREATE EXTENSION IF NOT EXISTS pg_trgm`).Error; err != nil {
+		if log != nil {
+			log.Warn("create pg_trgm extension failed; media search falls back to sequential scan", zap.Error(err))
+		}
+		return nil
+	}
+	// 首次在已有大库上执行会重建索引（服务尚未开始接受请求），之后每次启动都因
+	// IF NOT EXISTS 直接跳过。
+	if log != nil {
+		log.Info("ensuring postgres trigram search indexes")
+	}
+	for _, stmt := range []string{
+		`CREATE INDEX IF NOT EXISTS idx_media_title_trgm ON media USING gin (title gin_trgm_ops)`,
+		`CREATE INDEX IF NOT EXISTS idx_media_original_name_trgm ON media USING gin (original_name gin_trgm_ops)`,
+		`CREATE INDEX IF NOT EXISTS idx_media_path_trgm ON media USING gin (path gin_trgm_ops)`,
+		`CREATE INDEX IF NOT EXISTS idx_media_genres_trgm ON media USING gin (genres gin_trgm_ops)`,
+	} {
+		if err := db.Exec(stmt).Error; err != nil {
+			if log != nil {
+				log.Warn("create trigram index failed; media search may fall back to sequential scan",
+					zap.String("statement", stmt), zap.Error(err))
+			}
+			return nil
+		}
+	}
 	return nil
 }
 
@@ -42,6 +174,105 @@ func ensureSQLiteQueryOptimizer(db *gorm.DB) error {
 	return db.Exec("ANALYZE").Error
 }
 
+// dropLegacyReaderSourceUniqueIndex 删除书源表上旧版 source_url 唯一索引。
+//
+// 书源改为按用户独立后唯一键是 (user_id, source_url)；SQLite 的 RenameTable 与
+// AutoMigrate 都不会删除按旧名创建的索引（实测旧唯一索引在改名后依然生效），
+// 必须显式删除，否则第二个用户导入同一书源会撞唯一约束。
+func dropLegacyReaderSourceUniqueIndex(db *gorm.DB) error {
+	if !db.Migrator().HasTable(&model.ReaderBookSource{}) {
+		return nil
+	}
+	for _, name := range []string{"idx_reader_book_sources_source_url", "reader_book_sources_source_url_key"} {
+		if db.Migrator().HasIndex(&model.ReaderBookSource{}, name) {
+			if err := db.Migrator().DropIndex(&model.ReaderBookSource{}, name); err != nil {
+				return err
+			}
+		}
+	}
+	// 旧版 DeleteSource 是软删：这些历史行会继续占用 (user_id, source_url) 唯一键，
+	// 让「删掉再导入同一书源」失败。书源是可重新导入的数据，这里一次性清掉。
+	return db.Unscoped().Where("deleted_at IS NOT NULL").Delete(&model.ReaderBookSource{}).Error
+}
+
+// backfillReaderSourceOwnership 给老库的书源补上归属用户。
+//
+// 书源原先全局唯一，现在按用户独立：按「谁的书架上有这本书」把书源分配给该用户；
+// 同一书源被多个用户引用时，给每个用户复制一份副本（各自启停/排序/改规则），
+// 这样谁都不会因为别人删源而失去书源。
+//
+// 没有 user_id 且无人引用的书源保持原样（user_id 为空）——它不再出现在任何人的
+// 列表里，但数据仍在，需要时可以人工认领。
+func backfillReaderSourceOwnership(db *gorm.DB) error {
+	if !db.Migrator().HasTable(&model.ReaderBookSource{}) {
+		return nil
+	}
+	var pending []model.ReaderBookSource
+	if err := db.Where("user_id = '' OR user_id IS NULL").Find(&pending).Error; err != nil {
+		return err
+	}
+	for i := range pending {
+		src := pending[i]
+		if err := assignOrCloneReaderSource(db, &src); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func assignOrCloneReaderSource(db *gorm.DB, src *model.ReaderBookSource) error {
+	if src == nil || src.SourceURL == "" {
+		return nil
+	}
+	// 引用该书源的书籍分布（去重到用户）。
+	type ownerCount struct {
+		UserID string
+		N      int64
+	}
+	var owners []ownerCount
+	if err := db.Model(&model.ReaderBook{}).
+		Select("user_id, COUNT(*) AS n").
+		Where("origin = ?", src.SourceURL).
+		Group("user_id").Order("n DESC").Scan(&owners).Error; err != nil {
+		return err
+	}
+	if len(owners) == 0 {
+		return nil // 无人引用：保持无归属
+	}
+	// 第一个用户（引用最多）直接接手这一行。
+	owner := owners[0].UserID
+	if owner == "" {
+		return nil
+	}
+	if err := db.Model(&model.ReaderBookSource{}).
+		Where("id = ?", src.ID).
+		Updates(map[string]any{"user_id": owner}).Error; err != nil {
+		return err
+	}
+	// 其余用户各复制一份副本（新行 ID，其余字段全量拷贝）。
+	for _, o := range owners[1:] {
+		if o.UserID == "" || o.UserID == owner {
+			continue
+		}
+		var exists int64
+		if err := db.Model(&model.ReaderBookSource{}).
+			Where("user_id = ? AND source_url = ?", o.UserID, src.SourceURL).
+			Count(&exists).Error; err != nil {
+			return err
+		}
+		if exists > 0 {
+			continue
+		}
+		clone := *src
+		clone.ID = ""
+		clone.UserID = o.UserID
+		if err := db.Create(&clone).Error; err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 // dedupePlaybackHistories removes duplicate (user_id, media_id) rows left by
 // the former read-then-write upsert, so the uniq_user_history composite unique
 // index can be created on existing databases. Keeps the most recent row per
@@ -67,16 +298,35 @@ func ensurePostgresColumnCompatibility(db *gorm.DB) error {
 	if !isPostgres(db) {
 		return nil
 	}
-	statements := []string{
-		`ALTER TABLE media ALTER COLUMN container TYPE varchar(128)`,
-		`ALTER TABLE media ALTER COLUMN genres TYPE text`,
-		`ALTER TABLE media ALTER COLUMN series_id TYPE varchar(128)`,
-		`ALTER TABLE media ALTER COLUMN duplicate_of TYPE varchar(128)`,
-		`ALTER TABLE playback_histories ALTER COLUMN media_id TYPE varchar(128)`,
-		`ALTER TABLE favorites ALTER COLUMN media_id TYPE varchar(128)`,
-		`ALTER TABLE playlist_items ALTER COLUMN media_id TYPE varchar(128)`,
+	// 只在类型确实不匹配时才 ALTER。
+	//
+	// PostgreSQL 的 ALTER COLUMN ... TYPE 只要类型声明与目标不同就会整表重写并
+	// 重建相关索引，执行期间持有 ACCESS EXCLUSIVE 锁。此前这里每次启动都无条件
+	// 发这 7 条语句：类型其实早已一致，但几十万行的 media 表仍然被反复重写，
+	// 启动会卡住数分钟，且期间这张表连读都被阻塞。
+	changes := []struct {
+		table  string
+		column string
+		target string
+	}{
+		{"media", "container", "varchar(128)"},
+		{"media", "genres", "text"},
+		{"media", "series_id", "varchar(128)"},
+		{"media", "duplicate_of", "varchar(128)"},
+		{"playback_histories", "media_id", "varchar(128)"},
+		{"favorites", "media_id", "varchar(128)"},
+		{"playlist_items", "media_id", "varchar(128)"},
 	}
-	for _, stmt := range statements {
+	for _, change := range changes {
+		current, found, err := postgresColumnType(db, change.table, change.column)
+		if err != nil {
+			return err
+		}
+		if !found || current == change.target {
+			continue
+		}
+		stmt := "ALTER TABLE " + quoteIdent(change.table) +
+			" ALTER COLUMN " + quoteIdent(change.column) + " TYPE " + change.target
 		if err := db.Exec(stmt).Error; err != nil {
 			return err
 		}
@@ -84,6 +334,35 @@ func ensurePostgresColumnCompatibility(db *gorm.DB) error {
 	return nil
 }
 
+// postgresColumnType 返回列在当前 schema 下的规范化类型描述，例如
+// "varchar(128)" / "text"。列不存在时 found 为 false。
+func postgresColumnType(db *gorm.DB, table, column string) (value string, found bool, err error) {
+	var row struct {
+		DataType  string
+		MaxLength *int64
+	}
+	if err := db.Raw(`
+SELECT data_type AS data_type, character_maximum_length AS max_length
+FROM information_schema.columns
+WHERE table_schema = current_schema() AND table_name = ? AND column_name = ?
+`, table, column).Scan(&row).Error; err != nil {
+		return "", false, fmt.Errorf("inspect postgres column %s.%s: %w", table, column, err)
+	}
+	dataType := strings.ToLower(strings.TrimSpace(row.DataType))
+	if dataType == "" {
+		return "", false, nil
+	}
+	// information_schema 用的是 SQL 标准名，映射回 GORM 标签里的写法再比较。
+	switch dataType {
+	case "character varying", "varchar":
+		dataType = "varchar"
+	}
+	if row.MaxLength != nil && *row.MaxLength > 0 {
+		dataType = fmt.Sprintf("%s(%d)", dataType, *row.MaxLength)
+	}
+	return dataType, true, nil
+}
+
 func ensurePerformanceIndexes(db *gorm.DB) error {
 	statements := []string{
 		// 完整多级排序索引：媒体库分页与首页预览的 ORDER BY

internal/database/schema_migration_path_index_test.go

@@ -0,0 +1,54 @@
+package database
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// TestAutoMigrateCreatesMediaPathUniqueIndex 守住 media.path 的唯一约束。
+//
+// 模型上不再声明 gorm:"uniqueIndex"（PostgreSQL 的 btree 单条索引项上限是
+// 2704 字节，而 varchar(1024) 在中文路径下可达 3072 字节，对整列建唯一索引会让
+// 这类行插入直接失败），改由 AutoMigrate 里的 ensureMediaPathIndex 按方言显式
+// 建立。一旦这个调用被漏掉，扫描会静默产生重复的媒体行（同一文件被入库多次）。
+func TestAutoMigrateCreatesMediaPathUniqueIndex(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(filepath.Join(t.TempDir(), "mebox.db")), &gorm.Config{
+		Logger: logger.Default.LogMode(logger.Silent),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	// 必须在 TempDir 清理之前关掉连接，否则 Windows 上删除库文件会失败。
+	// t.Cleanup 是后进先出：这里注册的关闭早于 t.TempDir 注册的删除。
+	if sqlDB, err := db.DB(); err == nil {
+		t.Cleanup(func() { _ = sqlDB.Close() })
+	}
+	if err := AutoMigrate(db); err != nil {
+		t.Fatalf("AutoMigrate: %v", err)
+	}
+
+	var definition string
+	if err := db.Raw(`SELECT COALESCE(sql, '') FROM sqlite_master WHERE type = 'index' AND name = 'idx_media_path'`).Scan(&definition).Error; err != nil {
+		t.Fatal(err)
+	}
+	if definition == "" {
+		t.Fatal("AutoMigrate did not create idx_media_path")
+	}
+	if !strings.Contains(strings.ToUpper(definition), "UNIQUE") {
+		t.Fatalf("idx_media_path is not unique: %q", definition)
+	}
+
+	if err := db.Create(&model.Media{Base: model.Base{ID: "m-1"}, Path: "/media/a.mkv"}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&model.Media{Base: model.Base{ID: "m-2"}, Path: "/media/a.mkv"}).Error; err == nil {
+		t.Fatal("a duplicate media path was accepted; the unique constraint is not enforced")
+	}
+}

internal/database/sqlite_migration_copy.go

@@ -78,7 +78,7 @@ func copyModelTables(src, target *gorm.DB, batchSize int) (map[string]int64, int
 			if filtered.Len() > 0 {
 				filteredPtr := reflect.New(filtered.Type())
 				filteredPtr.Elem().Set(filtered)
-				if err := target.Clauses(clause.OnConflict{DoNothing: true}).CreateInBatches(filteredPtr.Interface(), batchSize).Error; err != nil {
+				if err := InsertPreservingValues(target.Clauses(clause.OnConflict{DoNothing: true}), filteredPtr.Interface(), batchSize); err != nil {
 					return tableCounts, totalCopied, fmt.Errorf("copy sqlite table %s: %w", table, err)
 				}
 				copiedForTable += int64(filtered.Len())

internal/database/sqlite_runtime.go

@@ -104,19 +104,18 @@ func (g *sqliteWriteGate) Lock(ctx context.Context) (*sqliteGateHolder, error) {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	// ctx 取消时唤醒等待者（cond 无法感知 ctx，用旁路 goroutine 广播）。
-	if done := ctx.Done(); done != nil {
-		stop := make(chan struct{})
-		defer close(stop)
-		go func() {
-			select {
-			case <-done:
-				g.cond.Broadcast()
-			case <-stop:
-			}
-		}()
+	// 广播也必须持有同一把锁，否则取消可能落在检查与 Wait 之间而丢失。
+	wake := func() {
+		g.mu.Lock()
+		defer g.mu.Unlock()
+		g.cond.Broadcast()
 	}
+	stopCancel := context.AfterFunc(ctx, wake)
+	defer stopCancel()
 	for {
+		if ctx.Err() != nil {
+			return nil, ctx.Err()
+		}
 		if g.owner == nil {
 			holder := &sqliteGateHolder{
 				id:       sqliteGateHolderSeq.Add(1),
@@ -125,16 +124,17 @@ func (g *sqliteWriteGate) Lock(ctx context.Context) (*sqliteGateHolder, error) {
 			g.owner = holder
 			return holder, nil
 		}
-		if ctx.Err() != nil {
-			return nil, ctx.Err()
-		}
-		if time.Since(g.owner.acquired) > sqliteGateHoldLimit {
+		remaining := sqliteGateHoldLimit - time.Since(g.owner.acquired)
+		if remaining <= 0 {
 			// 持有者疑似 panic 泄漏（After 回调未执行）：强制回收。
 			g.owner = nil
 			g.cond.Broadcast()
 			continue
 		}
+		// 无后续写入或取消时，也要在租约到期后主动唤醒等待者。
+		timer := time.AfterFunc(remaining, wake)
 		g.cond.Wait()
+		timer.Stop()
 	}
 }
 

internal/database/sqlite_runtime_test.go

@@ -0,0 +1,79 @@
+package database
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+)
+
+func TestSQLiteWriteGateRejectsCancelledContext(t *testing.T) {
+	ctx, cancel := context.WithCancel(t.Context())
+	cancel()
+	gate := newSQLiteWriteGate()
+	holder, err := gate.Lock(ctx)
+	defer gate.Unlock(holder)
+	if !errors.Is(err, context.Canceled) {
+		t.Fatalf("Lock error=%v, want context.Canceled", err)
+	}
+}
+
+func TestSQLiteWriteGateWakesForExpiredHolder(t *testing.T) {
+	gate := newSQLiteWriteGate()
+	holder, err := gate.Lock(t.Context())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer gate.Unlock(holder)
+	// Make the lease expire shortly, without waiting a full minute.
+	gate.mu.Lock()
+	holder.acquired = time.Now().Add(-sqliteGateHoldLimit + 20*time.Millisecond)
+	gate.mu.Unlock()
+	done := make(chan *sqliteGateHolder, 1)
+	go func() {
+		next, _ := gate.Lock(t.Context())
+		done <- next
+	}()
+	select {
+	case next := <-done:
+		gate.Unlock(holder) // A stale holder must not unlock its successor.
+		gate.mu.Lock()
+		owner := gate.owner
+		gate.mu.Unlock()
+		gate.Unlock(next)
+		if next == nil || owner != next {
+			t.Fatal("expired holder released the new owner's lock")
+		}
+	case <-time.After(time.Second):
+		gate.Unlock(holder)
+		gate.Unlock(<-done)
+		t.Fatal("waiter was not woken when the holder expired")
+	}
+}
+
+func TestSQLiteWriteGateWakesForCancellation(t *testing.T) {
+	gate := newSQLiteWriteGate()
+	holder, err := gate.Lock(t.Context())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer gate.Unlock(holder)
+	ctx, cancel := context.WithCancel(t.Context())
+	done := make(chan error, 1)
+	go func() {
+		next, err := gate.Lock(ctx)
+		gate.Unlock(next)
+		done <- err
+	}()
+	cancel()
+	select {
+	case err := <-done:
+		if !errors.Is(err, context.Canceled) {
+			t.Fatalf("Lock error=%v, want context.Canceled", err)
+		}
+	case <-time.After(time.Second):
+		gate.Unlock(holder)
+		<-done
+		t.Fatal("waiter was not woken for cancellation")
+	}
+}

internal/handler/emby_mounts.go

@@ -197,6 +197,32 @@ func deleteEmbyMountHandler(svc *service.Container) gin.HandlerFunc {
 	}
 }
 
+// setEmbyMountsEnabledHandler 一键启用/停用某账号下的全部挂载。
+//
+// 远端整站不可用时（如 Cloudflare 522），管理员可以用它把该账号的挂载
+// 全部从媒体库摘掉，首页立刻只返回本地库；远端恢复后再一键启用。
+func setEmbyMountsEnabledHandler(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		var req struct {
+			Enabled *bool `json:"enabled" binding:"required"`
+		}
+		if err := c.ShouldBindJSON(&req); err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+		if svc.EmbyRemote == nil {
+			c.JSON(http.StatusServiceUnavailable, gin.H{"error": "emby remote service not available"})
+			return
+		}
+		affected, err := svc.EmbyRemote.SetMountsEnabled(c.Request.Context(), c.Param("id"), *req.Enabled)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"ok": true, "affected": affected})
+	}
+}
+
 type reorderEmbyMountsReq struct {
 	IDs []string `json:"ids" binding:"required"`
 }

internal/handler/emby_mounts_enabled_test.go

@@ -0,0 +1,108 @@
+package handler
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/glebarez/sqlite"
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/database"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+	"github.com/truewhile/MeBox/internal/service"
+)
+
+// TestSetEmbyMountsEnabledHandler 覆盖「一键停用/启用某账号下全部挂载」：
+// 只影响目标账号，且配置保留（不是删除）。
+func TestSetEmbyMountsEnabledHandler(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := database.AutoMigrate(db); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	ctx := t.Context()
+
+	m1 := &model.EmbyMount{AccountID: "acct-1", RemoteViewID: "view-1", Enabled: true}
+	m2 := &model.EmbyMount{AccountID: "acct-1", RemoteViewID: "view-2", Enabled: true}
+	other := &model.EmbyMount{AccountID: "acct-2", RemoteViewID: "view-3", Enabled: true}
+	for _, m := range []*model.EmbyMount{m1, m2, other} {
+		if err := repos.EmbyMount.Create(ctx, m); err != nil {
+			t.Fatalf("create mount: %v", err)
+		}
+	}
+
+	svc := &service.Container{
+		Repo:       repos,
+		EmbyRemote: service.NewEmbyRemoteService(nil, zap.NewNop(), repos, nil),
+	}
+	router := gin.New()
+	router.PUT("/admin/emby/accounts/:id/mounts/enabled", setEmbyMountsEnabledHandler(svc))
+
+	call := func(body map[string]any) *httptest.ResponseRecorder {
+		raw, _ := json.Marshal(body)
+		req := httptest.NewRequest(http.MethodPut, "/admin/emby/accounts/acct-1/mounts/enabled", bytes.NewReader(raw))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+		router.ServeHTTP(w, req)
+		return w
+	}
+
+	w := call(map[string]any{"enabled": false})
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	var resp struct {
+		OK       bool  `json:"ok"`
+		Affected int64 `json:"affected"`
+	}
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("decode response: %v", err)
+	}
+	if !resp.OK || resp.Affected != 2 {
+		t.Fatalf("expected ok with affected=2, got %+v", resp)
+	}
+
+	rows, err := repos.EmbyMount.List(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, row := range rows {
+		want := row.AccountID != "acct-1" // 目标账号停用，其他账号不受影响
+		if row.Enabled != want {
+			t.Fatalf("mount %s enabled=%v, want %v", row.ID, row.Enabled, want)
+		}
+	}
+
+	// 重新启用：挂载记录仍在，只是开关回 true。
+	w = call(map[string]any{"enabled": true})
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	rows, err = repos.EmbyMount.List(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(rows) != 3 {
+		t.Fatalf("expected mounts to be preserved, got %d rows", len(rows))
+	}
+	for _, row := range rows {
+		if !row.Enabled {
+			t.Fatalf("mount %s should be enabled again", row.ID)
+		}
+	}
+
+	// 缺少 enabled 字段必须拒绝，避免误把全部挂载停掉。
+	if w := call(map[string]any{}); w.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400 for missing enabled, got %d: %s", w.Code, w.Body.String())
+	}
+}

internal/handler/handler.go

@@ -46,6 +46,8 @@ func Register(r *gin.Engine, cfg *config.Config, log *zap.Logger, svc *service.C
 
 		registerPublicAuthRoutes(api, svc, log)
 
+		registerMobileRoutes(api, svc, log)
+
 		registerAuthenticatedRoutes(api, cfg, svc)
 
 		registerAdminRoutes(api, cfg, svc)

internal/handler/media.go

@@ -810,6 +810,20 @@ func streamHandler(svc *service.Container) gin.HandlerFunc {
 				c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
 				return
 			}
+			// 远程条目可能是「整部剧/季/目录」：这类条目自身没有媒体源，远程 Emby 对它
+			// 们的 /Videos/{id}/stream 会直接回 500（Unable to cast object of type
+			// 'Series' to type 'IHasMediaSources'）。网页端、外部播放器、第三方客户端都
+			// 可能把这种 ID 送进来，这里统一改投第一集：302 让客户端自己跟过去，播放器
+			// 原有的 token / proxy 查询参数一并保留。
+			if playable := svc.EmbyRemote.PlayableRemoteID(ctx, acct, remoteID); playable != "" && playable != remoteID {
+				target := "/api/stream/" + service.EncodeEmbyRemoteID(mountID, playable)
+				if rawQuery := c.Request.URL.RawQuery; rawQuery != "" {
+					target += "?" + rawQuery
+				}
+				setRedirectNoStoreHeaders(c)
+				c.Redirect(http.StatusFound, target)
+				return
+			}
 			// 远程 Emby 条目的同源转发：VR 全景需要浏览器读帧（见 stream_proxy.go），
 			// 与挂载账号的 proxy_play 开关等价。
 			if mount.ProxyPlay || wantSameOriginProxy(c) {

internal/handler/media_search_test.go

@@ -0,0 +1,111 @@
+package handler
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/glebarez/sqlite"
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/middleware"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+	"github.com/truewhile/MeBox/internal/service"
+)
+
+func TestSearchMediaSeriesKeepsRemoteLibrariesSeparate(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]any{
+			"TotalRecordCount": 1,
+			"Items": []map[string]any{{
+				"Id": "same-series", "Name": "龙珠改", "Type": "Series",
+				"ProviderIds": map[string]string{"Tmdb": "61709"},
+			}},
+		})
+	}))
+	defer upstream.Close()
+
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.AutoMigrate(&model.Library{}, &model.Media{}, &model.StrmAccount{}, &model.EmbyMount{}, &model.Setting{}, &model.User{}, &model.PlayProfile{}); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	lib := model.Library{Name: "本地番剧", Path: "/media/anime", Type: "anime", Enabled: true}
+	if err := repos.Library.Create(t.Context(), &lib); err != nil {
+		t.Fatal(err)
+	}
+	rows := []model.Media{
+		{Base: model.Base{ID: "local-1"}, LibraryID: lib.ID, Title: "龙珠改", Path: "/media/anime/龙珠改/Season 1/ep1.mkv", SeasonNum: 1, EpisodeNum: 1, TMDbID: 61709},
+		{Base: model.Base{ID: "local-2"}, LibraryID: lib.ID, Title: "龙珠改", Path: "/media/anime/龙珠改/Season 1/ep2.mkv", SeasonNum: 1, EpisodeNum: 2, TMDbID: 61709},
+	}
+	if err := db.Create(&rows).Error; err != nil {
+		t.Fatal(err)
+	}
+	rawConfig, _ := json.Marshal(map[string]string{"url": upstream.URL, "token": "fake-token"})
+	acct := model.StrmAccount{Base: model.Base{ID: "account"}, Name: "Emby", Provider: model.StrmProviderEmbyRemote, Config: string(rawConfig), Enabled: true}
+	if err := repos.StrmAccount.Create(t.Context(), &acct); err != nil {
+		t.Fatal(err)
+	}
+	expectedIDs := map[string]string{lib.ID: "local-1"}
+	for _, suffix := range []string{"a", "b"} {
+		mount := model.EmbyMount{Base: model.Base{ID: "mount-" + suffix}, AccountID: acct.ID, RemoteViewID: "view-" + suffix, RemoteViewName: "番剧" + suffix, CollectionType: "tvshows", Enabled: true}
+		if err := repos.EmbyMount.Create(t.Context(), &mount); err != nil {
+			t.Fatal(err)
+		}
+		expectedIDs[service.EncodeEmbyRemoteID(mount.ID, mount.RemoteViewID)] = service.EncodeEmbyRemoteID(mount.ID, "same-series")
+	}
+	svc := &service.Container{
+		Repo:       repos,
+		Media:      service.NewMediaService(&config.Config{}, zap.NewNop(), repos),
+		EmbyRemote: service.NewEmbyRemoteService(&config.Config{}, zap.NewNop(), repos, service.NewCryptoService("", zap.NewNop())),
+	}
+
+	request := func(params string) ([]model.Media, int) {
+		t.Helper()
+		w := httptest.NewRecorder()
+		c, _ := gin.CreateTestContext(w)
+		c.Set(middleware.CtxUserID, "admin")
+		c.Set(middleware.CtxUserRole, "admin")
+		c.Request = httptest.NewRequest(http.MethodGet, "/api/media?q=龙珠改&group_series=1&"+params, nil)
+		searchMediaHandler(svc)(c)
+		if w.Code != http.StatusOK {
+			t.Fatalf("search status=%d, body=%s", w.Code, w.Body.String())
+		}
+		var response struct {
+			Items []model.Media `json:"items"`
+			Total int           `json:"total"`
+		}
+		if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
+			t.Fatal(err)
+		}
+		return response.Items, response.Total
+	}
+
+	items, _ := request("limit=8")
+	if len(items) != len(expectedIDs) {
+		t.Fatalf("got %d results, want one local series and two remote series: %#v", len(items), items)
+	}
+	seen := make(map[string]bool)
+	for page := 1; page <= len(expectedIDs); page++ {
+		items, total := request(fmt.Sprintf("page=%d&page_size=1", page))
+		if total != len(expectedIDs) || len(items) != 1 {
+			t.Fatalf("page %d: total=%d items=%#v, want total=3 and one item", page, total, items)
+		}
+		item := items[0]
+		if expectedIDs[item.DisplayLibraryID] != item.ID || seen[item.DisplayLibraryID] || item.DisplayLibraryName == "" {
+			t.Fatalf("page %d lost or repeated a library's series identity: %#v", page, item)
+		}
+		seen[item.DisplayLibraryID] = true
+	}
+}

internal/handler/media_test.go

@@ -26,7 +26,9 @@ import (
 )
 
 func TestQueueLibraryRootScanImportsNewLibraryMedia(t *testing.T) {
-	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	// The scanner and polling loop use separate connections; :memory: gives
+	// each connection its own empty database.
+	db, err := gorm.Open(sqlite.Open(filepath.Join(t.TempDir(), "scan.db")+"?_pragma=journal_mode(WAL)&_pragma=busy_timeout(5000)"), &gorm.Config{})
 	if err != nil {
 		t.Fatal(err)
 	}

internal/handler/mobile_auth.go

@@ -0,0 +1,395 @@
+// Package handler — 移动端 /api/v1 认证端点。
+package handler
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/middleware"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+	"github.com/truewhile/MeBox/internal/service"
+)
+
+// mobileUserPayload 是 v1 返回的用户摘要。这里显式挑选字段，避免把仅服务端
+// 使用的偏好和内部状态带进新契约。
+type mobileUserPayload struct {
+	ID                 string     `json:"id"`
+	Username           string     `json:"username"`
+	Nickname           string     `json:"nickname,omitempty"`
+	Role               string     `json:"role"`
+	Tier               string     `json:"tier"`
+	IsActive           bool       `json:"is_active"`
+	ForcePasswordReset bool       `json:"force_password_reset"`
+	ExpiresAt          *time.Time `json:"expires_at,omitempty"`
+}
+
+func toMobileUserPayload(u *model.User) *mobileUserPayload {
+	if u == nil {
+		return nil
+	}
+	return &mobileUserPayload{
+		ID:                 u.ID,
+		Username:           u.Username,
+		Nickname:           u.Nickname,
+		Role:               u.Role,
+		Tier:               u.Tier,
+		IsActive:           u.IsActive,
+		ForcePasswordReset: u.ForcePasswordReset,
+		ExpiresAt:          u.ExpiredAt,
+	}
+}
+
+type mobileSessionPayload struct {
+	AuthSessionID string    `json:"auth_session_id"`
+	DeviceID      string    `json:"device_id"`
+	DeviceName    string    `json:"device_name,omitempty"`
+	ClientName    string    `json:"client_name,omitempty"`
+	ClientVersion string    `json:"client_version,omitempty"`
+	CreatedAt     time.Time `json:"created_at"`
+	LastUsedAt    time.Time `json:"last_used_at"`
+	ExpiresAt     time.Time `json:"expires_at"`
+}
+
+func toMobileSessionPayload(s *model.AuthSession) *mobileSessionPayload {
+	if s == nil {
+		return nil
+	}
+	return &mobileSessionPayload{
+		AuthSessionID: s.ID,
+		DeviceID:      s.DeviceID,
+		DeviceName:    s.DeviceName,
+		ClientName:    s.ClientName,
+		ClientVersion: s.ClientVersion,
+		CreatedAt:     s.CreatedAt,
+		LastUsedAt:    s.LastUsedAt,
+		ExpiresAt:     s.ExpiresAt,
+	}
+}
+
+type mobileLoginRequest struct {
+	Username      string `json:"username" binding:"required"`
+	Password      string `json:"password" binding:"required"`
+	DeviceID      string `json:"device_id" binding:"required"`
+	DeviceName    string `json:"device_name"`
+	ClientName    string `json:"client_name"`
+	ClientVersion string `json:"client_version"`
+}
+
+type mobileRefreshRequest struct {
+	RefreshToken string `json:"refresh_token" binding:"required"`
+}
+
+// mobileAuthRequired 是 v1 专用认证中间件：要求有效 JWT + 有效设备会话，
+// 并统一输出 v1 错误契约。
+func mobileAuthRequired(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		raw := middleware.ExtractToken(c)
+		if raw == "" {
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"access token required", false, 0)
+			return
+		}
+		claims, err := svc.Token.ValidateAccessToken(raw)
+		if err != nil {
+			if errors.Is(err, jwt.ErrTokenExpired) {
+				writeMobileError(c, http.StatusUnauthorized, mobileCodeTokenExpired,
+					"access token expired", false, 0)
+				return
+			}
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"invalid access token", false, 0)
+			return
+		}
+		if strings.TrimSpace(claims.Purpose) != "" {
+			writeMobileError(c, http.StatusForbidden, mobileCodePermissionDenied,
+				"token scope denied for this endpoint", false, 0)
+			return
+		}
+		sessionID := strings.TrimSpace(claims.Sid)
+		if sessionID == "" {
+			// v1 客户端必须使用登录时创建的会话；旧网页令牌不进入移动端契约。
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"auth session required; sign in again", false, 0)
+			return
+		}
+		session, err := svc.AuthSessions.Validate(c.Request.Context(), sessionID, claims.UserID)
+		if err != nil {
+			if service.IsTransientDatabaseLock(err) {
+				writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+					"auth session check temporarily unavailable", true, 2)
+				return
+			}
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeSessionRevoked,
+				"auth session revoked or expired", false, 0)
+			return
+		}
+		c.Set(middleware.CtxUserID, claims.UserID)
+		c.Set(middleware.CtxUserRole, claims.Role)
+		c.Set(middleware.CtxUserTier, claims.Tier)
+		c.Set(middleware.CtxAuthSessionID, sessionID)
+		c.Set(mobileCtxAuthSession, session)
+		// 每个请求写一次 last_used_at 会在 SQLite 上造成不必要的写锁竞争；
+		// 一分钟内的重复请求不更新，足以支撑设备列表的“最近活动”。
+		if time.Since(session.LastUsedAt) > time.Minute {
+			svc.AuthSessions.Touch(c.Request.Context(), sessionID)
+		}
+		c.Next()
+	}
+}
+
+// mobileLogoutAuthRequired 只校验 JWT 与 sid，不要求会话仍然有效。
+// 退出必须幂等：同一个令牌重复调用 logout 也要返回成功，而不是在第二次
+// 被会话校验拦成 401。
+func mobileLogoutAuthRequired(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		raw := middleware.ExtractToken(c)
+		if raw == "" {
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"access token required", false, 0)
+			return
+		}
+		claims, err := svc.Token.ValidateAccessToken(raw)
+		if err != nil {
+			if errors.Is(err, jwt.ErrTokenExpired) {
+				writeMobileError(c, http.StatusUnauthorized, mobileCodeTokenExpired,
+					"access token expired", false, 0)
+				return
+			}
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"invalid access token", false, 0)
+			return
+		}
+		sessionID := strings.TrimSpace(claims.Sid)
+		if sessionID == "" {
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"auth session required; sign in again", false, 0)
+			return
+		}
+		c.Set(middleware.CtxUserID, claims.UserID)
+		c.Set(middleware.CtxAuthSessionID, sessionID)
+		c.Next()
+	}
+}
+
+func mobileLoginHandler(svc *service.Container, log *zap.Logger) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		var req mobileLoginRequest
+		if err := c.ShouldBindJSON(&req); err != nil {
+			writeMobileError(c, http.StatusBadRequest, mobileCodeInvalidArgument,
+				"username, password and device_id are required", false, 0)
+			return
+		}
+		req.Username = strings.TrimSpace(req.Username)
+		req.DeviceID = strings.TrimSpace(req.DeviceID)
+		if req.Username == "" || req.DeviceID == "" || len(req.DeviceID) > 128 {
+			writeMobileError(c, http.StatusBadRequest, mobileCodeInvalidArgument,
+				"invalid username or device_id", false, 0)
+			return
+		}
+		ctx := c.Request.Context()
+		user, err := svc.Auth.Authenticate(ctx, req.Username, req.Password)
+		if err != nil {
+			writeMobileAuthError(c, log, err)
+			return
+		}
+
+		deviceName := strings.TrimSpace(req.DeviceName)
+		clientName := strings.TrimSpace(req.ClientName)
+		if clientName == "" {
+			clientName = "MeBox Android"
+		}
+		session, err := svc.AuthSessions.Create(ctx, service.CreateAuthSessionInput{
+			UserID:        user.ID,
+			DeviceID:      req.DeviceID,
+			DeviceName:    deviceName,
+			ClientName:    clientName,
+			ClientVersion: req.ClientVersion,
+		})
+		if err != nil {
+			if isTransientServiceError(err) {
+				writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+					"cannot create auth session right now", true, 2)
+				return
+			}
+			writeMobileError(c, http.StatusBadRequest, mobileCodeInvalidArgument,
+				"invalid device information", false, 0)
+			return
+		}
+
+		tokens, err := svc.Token.IssuePairForSession(ctx, user.ID, user.Role, user.Tier, session.ID)
+		if err != nil {
+			// 令牌签发失败时回收会话，避免留下永远无法使用的会话记录。
+			_ = svc.AuthSessions.Revoke(ctx, session.ID)
+			writeMobileAuthError(c, log, err)
+			return
+		}
+		if svc.Device != nil {
+			svc.Device.RecordLogin(ctx, user.ID, session.DeviceID, deviceName, clientName, c.ClientIP())
+		}
+		if svc.Audit != nil {
+			svc.Audit.RecordBestEffort(user.ID, "auth.mobile.login", user.Username, c.ClientIP(), "")
+		}
+		c.JSON(http.StatusOK, gin.H{
+			"auth_session_id": session.ID,
+			"user":            toMobileUserPayload(user),
+			"tokens":          tokens,
+		})
+	}
+}
+
+func mobileRefreshHandler(svc *service.Container, log *zap.Logger) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		var req mobileRefreshRequest
+		if err := c.ShouldBindJSON(&req); err != nil {
+			writeMobileError(c, http.StatusBadRequest, mobileCodeInvalidArgument,
+				"refresh_token required", false, 0)
+			return
+		}
+		ctx := c.Request.Context()
+		rt, err := svc.Repo.RefreshToken.FindByHash(ctx, repository.HashToken(req.RefreshToken))
+		if err != nil {
+			if isTransientServiceError(err) {
+				writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+					"token store temporarily unavailable", true, 2)
+				return
+			}
+			writeMobileAuthError(c, log, err)
+			return
+		}
+		// 只有 v1 登录签发的刷新令牌才带会话；旧网页令牌必须重新登录。
+		// 注意这里不能在 rt.Revoked 时提前返回：轮换宽限期内的幂等复用
+		// 由 TokenService 判定。
+		if rt == nil || strings.TrimSpace(rt.AuthSessionID) == "" {
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"refresh token is not bound to a device session; sign in again", false, 0)
+			return
+		}
+		if _, err := svc.AuthSessions.Validate(ctx, rt.AuthSessionID, rt.UserID); err != nil {
+			if isTransientServiceError(err) {
+				writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+					"auth session check temporarily unavailable", true, 2)
+				return
+			}
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeSessionRevoked,
+				"auth session revoked or expired", false, 0)
+			return
+		}
+
+		tokens, err := svc.Auth.RefreshTokens(ctx, req.RefreshToken)
+		if err != nil {
+			writeMobileAuthError(c, log, err)
+			return
+		}
+		user, err := svc.Repo.User.FindByID(ctx, rt.UserID)
+		if err != nil {
+			writeMobileAuthError(c, log, err)
+			return
+		}
+		if user == nil {
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"user not found", false, 0)
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{
+			"auth_session_id": rt.AuthSessionID,
+			"user":            toMobileUserPayload(user),
+			"tokens":          tokens,
+		})
+	}
+}
+
+func mobileSessionHandler(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		ctx := c.Request.Context()
+		userID := c.GetString(middleware.CtxUserID)
+		user, err := svc.Repo.User.FindByID(ctx, userID)
+		if err != nil {
+			writeMobileAuthError(c, svc.Log, err)
+			return
+		}
+		if user == nil {
+			writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+				"user not found", false, 0)
+			return
+		}
+		session, _ := c.Get(mobileCtxAuthSession)
+		sessionModel, _ := session.(*model.AuthSession)
+		c.JSON(http.StatusOK, gin.H{
+			"auth_session_id": c.GetString(middleware.CtxAuthSessionID),
+			"user":            toMobileUserPayload(user),
+			"session":         toMobileSessionPayload(sessionModel),
+		})
+	}
+}
+
+func mobileLogoutHandler(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		sessionID := c.GetString(middleware.CtxAuthSessionID)
+		if err := svc.AuthSessions.Revoke(c.Request.Context(), sessionID); err != nil {
+			if isTransientServiceError(err) {
+				writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+					"cannot revoke session right now", true, 2)
+				return
+			}
+			writeMobileError(c, http.StatusInternalServerError, mobileCodeServiceUnavailable,
+				"logout failed", false, 0)
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"status": "ok"})
+	}
+}
+
+// writeMobileAuthError 把 service 层错误映射为稳定错误码。
+// 临时性存储/基础设施错误必须返回可重试的 503，不能伪装成凭证失效。
+func writeMobileAuthError(c *gin.Context, log *zap.Logger, err error) {
+	switch {
+	case errors.Is(err, service.ErrInvalidCredentials), errors.Is(err, service.ErrInvalidRefreshToken):
+		writeMobileError(c, http.StatusUnauthorized, mobileCodeInvalidCredentials,
+			"invalid username, password or refresh token", false, 0)
+	case errors.Is(err, service.ErrTokenExpired):
+		writeMobileError(c, http.StatusUnauthorized, mobileCodeTokenExpired,
+			"refresh token expired", false, 0)
+	case errors.Is(err, service.ErrTokenRevoked),
+		errors.Is(err, service.ErrAuthSessionRevoked),
+		errors.Is(err, service.ErrAuthSessionExpired),
+		errors.Is(err, service.ErrAuthSessionRequired):
+		writeMobileError(c, http.StatusUnauthorized, mobileCodeSessionRevoked,
+			"auth session revoked or expired", false, 0)
+	case errors.Is(err, service.ErrUserInactive):
+		writeMobileError(c, http.StatusForbidden, mobileCodeAccountDisabled,
+			"account is disabled", false, 0)
+	case errors.Is(err, service.ErrUserExpired):
+		writeMobileError(c, http.StatusForbidden, mobileCodeAccountExpired,
+			"account has expired", false, 0)
+	case isTransientServiceError(err):
+		writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+			"service temporarily unavailable, please retry", true, 2)
+	default:
+		if log != nil {
+			log.Warn("mobile auth request failed", zap.Error(err))
+		}
+		writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+			"service temporarily unavailable, please retry", true, 2)
+	}
+}
+
+func isTransientServiceError(err error) bool {
+	if err == nil {
+		return false
+	}
+	if service.IsTransientDatabaseLock(err) {
+		return true
+	}
+	if errors.Is(err, context.DeadlineExceeded) || errors.Is(err, context.Canceled) {
+		return true
+	}
+	return false
+}

internal/handler/mobile_auth_test.go

@@ -0,0 +1,434 @@
+package handler
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/glebarez/sqlite"
+	"go.uber.org/zap"
+	"golang.org/x/crypto/bcrypt"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+	"github.com/truewhile/MeBox/internal/service"
+)
+
+const mobileTestSecret = "mobile-test-secret"
+
+func newMobileTestEnv(t *testing.T) (*gin.Engine, *service.Container) {
+	t.Helper()
+	gin.SetMode(gin.TestMode)
+
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{
+		Logger: logger.Default.LogMode(logger.Silent),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	sqlDB, err := db.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	// :memory: 只有单连接能看到同一份数据；handler 测试足够，且避免
+	// shared cache 名字在并行测试间串库。
+	sqlDB.SetMaxOpenConns(1)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	if err := db.AutoMigrate(
+		&model.User{}, &model.RefreshToken{}, &model.AuthSession{}, &model.Setting{},
+		&model.UserDevice{}, &model.UserPermission{},
+	); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	cfg := &config.Config{Secrets: config.SecretsConfig{JWTSecret: mobileTestSecret}}
+	svc := service.NewWithVersion(cfg, zap.NewNop(), repos, "MeBox-test")
+
+	router := gin.New()
+	Register(router, cfg, zap.NewNop(), svc)
+	return router, svc
+}
+
+func seedMobileUser(t *testing.T, svc *service.Container, username, password string) *model.User {
+	t.Helper()
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.MinCost)
+	if err != nil {
+		t.Fatal(err)
+	}
+	u := &model.User{Username: username, PasswordHash: string(hash), Role: "user", Tier: "free", IsActive: true}
+	if err := svc.Repo.User.Create(t.Context(), u); err != nil {
+		t.Fatal(err)
+	}
+	return u
+}
+
+func mobileJSONRequest(t *testing.T, router *gin.Engine, method, path, token string, body any, headers map[string]string) *httptest.ResponseRecorder {
+	t.Helper()
+	var reader *bytes.Reader
+	if body != nil {
+		raw, err := json.Marshal(body)
+		if err != nil {
+			t.Fatal(err)
+		}
+		reader = bytes.NewReader(raw)
+	} else {
+		reader = bytes.NewReader(nil)
+	}
+	req := httptest.NewRequest(method, path, reader)
+	req.Header.Set("Content-Type", "application/json")
+	if token != "" {
+		req.Header.Set("Authorization", "Bearer "+token)
+	}
+	for k, v := range headers {
+		req.Header.Set(k, v)
+	}
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	return w
+}
+
+func decodeMobileJSON(t *testing.T, w *httptest.ResponseRecorder, out any) {
+	t.Helper()
+	if err := json.Unmarshal(w.Body.Bytes(), out); err != nil {
+		t.Fatalf("decode body %q: %v", w.Body.String(), err)
+	}
+}
+
+func TestMobileServerInfoAnonymousAndCacheable(t *testing.T) {
+	router, _ := newMobileTestEnv(t)
+	w := mobileJSONRequest(t, router, http.MethodGet, "/api/v1/server-info", "", nil, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d body=%s", w.Code, w.Body.String())
+	}
+	if got := w.Header().Get("Cache-Control"); got != "no-store" {
+		t.Fatalf("Cache-Control = %q, want no-store", got)
+	}
+	var info service.ServerInfo
+	decodeMobileJSON(t, w, &info)
+	if info.ServerID == "" || info.ServerVersion != "MeBox-test" || info.APIVersion != "v1" {
+		t.Fatalf("unexpected server info: %+v", info)
+	}
+	if !info.Capabilities.DeviceSessions {
+		t.Fatalf("device_sessions capability should be true: %+v", info.Capabilities)
+	}
+	if info.Capabilities.PlaybackSessions || info.Capabilities.ReaderProgressV1 {
+		t.Fatalf("unimplemented capabilities must stay false: %+v", info.Capabilities)
+	}
+	if info.MinSupportedAppVersionCode < 1 {
+		t.Fatalf("min_supported_app_version_code = %d", info.MinSupportedAppVersionCode)
+	}
+
+	// 匿名访问不应要求 Authorization，也不应记录 cookie。
+	if len(w.Result().Cookies()) != 0 {
+		t.Fatalf("server-info should not set cookies")
+	}
+}
+
+func TestMobileAuthLifecycle(t *testing.T) {
+	router, svc := newMobileTestEnv(t)
+	user := seedMobileUser(t, svc, "alice", "secret-123")
+
+	// 1. 错误密码：401 + 稳定错误码 + request_id。
+	w := mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/login", "", map[string]any{
+		"username": "alice", "password": "wrong", "device_id": "device-1",
+	}, map[string]string{"X-Request-ID": "mobile-test-0001"})
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("wrong password status = %d body=%s", w.Code, w.Body.String())
+	}
+	var authErr mobileErrorBody
+	decodeMobileJSON(t, w, &authErr)
+	if authErr.Code != mobileCodeInvalidCredentials || authErr.RequestID != "mobile-test-0001" {
+		t.Fatalf("unexpected auth error: %+v", authErr)
+	}
+	if authErr.Retryable {
+		t.Fatalf("invalid credentials must not be retryable: %+v", authErr)
+	}
+
+	// 2. 缺少 device_id：400 INVALID_ARGUMENT。
+	w = mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/login", "", map[string]any{
+		"username": "alice", "password": "secret-123",
+	}, nil)
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("missing device id status = %d body=%s", w.Code, w.Body.String())
+	}
+	decodeMobileJSON(t, w, &authErr)
+	if authErr.Code != mobileCodeInvalidArgument {
+		t.Fatalf("code = %q, want %q", authErr.Code, mobileCodeInvalidArgument)
+	}
+
+	// 3. 正常登录。
+	w = mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/login", "", map[string]any{
+		"username": "alice", "password": "secret-123", "device_id": "device-1",
+		"device_name": "Pixel 9", "client_name": "MeBox Android", "client_version": "1.0.0",
+	}, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("login status = %d body=%s", w.Code, w.Body.String())
+	}
+	var loginResp struct {
+		AuthSessionID string            `json:"auth_session_id"`
+		User          mobileUserPayload `json:"user"`
+		Tokens        service.TokenPair `json:"tokens"`
+	}
+	decodeMobileJSON(t, w, &loginResp)
+	if loginResp.AuthSessionID == "" || loginResp.Tokens.AccessToken == "" || loginResp.Tokens.RefreshToken == "" {
+		t.Fatalf("incomplete login response: %+v", loginResp)
+	}
+	if loginResp.User.ID != user.ID || loginResp.User.Username != "alice" {
+		t.Fatalf("unexpected user payload: %+v", loginResp.User)
+	}
+	claims, err := svc.Token.ValidateAccessToken(loginResp.Tokens.AccessToken)
+	if err != nil {
+		t.Fatalf("validate access token: %v", err)
+	}
+	if claims.Sid != loginResp.AuthSessionID {
+		t.Fatalf("token sid = %q, want %q", claims.Sid, loginResp.AuthSessionID)
+	}
+	rt, err := svc.Repo.RefreshToken.FindByHash(t.Context(), repository.HashToken(loginResp.Tokens.RefreshToken))
+	if err != nil || rt == nil || rt.AuthSessionID != loginResp.AuthSessionID {
+		t.Fatalf("refresh token not bound to session: %+v err=%v", rt, err)
+	}
+
+	// 4. 会话读取。
+	w = mobileJSONRequest(t, router, http.MethodGet, "/api/v1/auth/session", loginResp.Tokens.AccessToken, nil, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("session status = %d body=%s", w.Code, w.Body.String())
+	}
+	var sessionResp struct {
+		AuthSessionID string                `json:"auth_session_id"`
+		User          mobileUserPayload     `json:"user"`
+		Session       *mobileSessionPayload `json:"session"`
+	}
+	decodeMobileJSON(t, w, &sessionResp)
+	if sessionResp.AuthSessionID != loginResp.AuthSessionID || sessionResp.Session == nil {
+		t.Fatalf("unexpected session response: %+v", sessionResp)
+	}
+	if sessionResp.Session.DeviceID != "device-1" || sessionResp.Session.DeviceName != "Pixel 9" {
+		t.Fatalf("unexpected session payload: %+v", sessionResp.Session)
+	}
+
+	// 5. 刷新：新令牌继续归属同一会话，旧刷新令牌被撤销。
+	w = mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/refresh", "", map[string]any{
+		"refresh_token": loginResp.Tokens.RefreshToken,
+	}, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("refresh status = %d body=%s", w.Code, w.Body.String())
+	}
+	var refreshResp struct {
+		AuthSessionID string            `json:"auth_session_id"`
+		Tokens        service.TokenPair `json:"tokens"`
+	}
+	decodeMobileJSON(t, w, &refreshResp)
+	if refreshResp.AuthSessionID != loginResp.AuthSessionID || refreshResp.Tokens.AccessToken == "" {
+		t.Fatalf("unexpected refresh response: %+v", refreshResp)
+	}
+	if refreshResp.Tokens.RefreshToken == loginResp.Tokens.RefreshToken {
+		t.Fatal("refresh token should rotate")
+	}
+	oldRT, err := svc.Repo.RefreshToken.FindByHash(t.Context(), repository.HashToken(loginResp.Tokens.RefreshToken))
+	if err != nil || oldRT == nil || !oldRT.Revoked {
+		t.Fatalf("old refresh token should be revoked: %+v err=%v", oldRT, err)
+	}
+
+	// 6. 用刷新后的访问令牌访问旧 API，确认 sid 会话校验在旧入口同样生效。
+	w = mobileJSONRequest(t, router, http.MethodGet, "/api/me", refreshResp.Tokens.AccessToken, nil, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("old api with fresh token status = %d body=%s", w.Code, w.Body.String())
+	}
+
+	// 7. 退出：成功且可重复。
+	for i := 0; i < 2; i++ {
+		w = mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/logout", refreshResp.Tokens.AccessToken, nil, nil)
+		if w.Code != http.StatusOK {
+			t.Fatalf("logout #%d status = %d body=%s", i+1, w.Code, w.Body.String())
+		}
+	}
+
+	// 8. 会话撤销后：v1 会话接口 401 SESSION_REVOKED。
+	w = mobileJSONRequest(t, router, http.MethodGet, "/api/v1/auth/session", refreshResp.Tokens.AccessToken, nil, nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("session after logout status = %d body=%s", w.Code, w.Body.String())
+	}
+	decodeMobileJSON(t, w, &authErr)
+	if authErr.Code != mobileCodeSessionRevoked {
+		t.Fatalf("session after logout code = %q, want %q", authErr.Code, mobileCodeSessionRevoked)
+	}
+
+	// 9. 被踢后的未过期 JWT 不能绕过旧 API。
+	w = mobileJSONRequest(t, router, http.MethodGet, "/api/me", refreshResp.Tokens.AccessToken, nil, nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("old api after logout status = %d body=%s", w.Code, w.Body.String())
+	}
+
+	// 10. 刷新令牌随会话一起撤销。
+	w = mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/refresh", "", map[string]any{
+		"refresh_token": refreshResp.Tokens.RefreshToken,
+	}, nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("refresh after logout status = %d body=%s", w.Code, w.Body.String())
+	}
+	decodeMobileJSON(t, w, &authErr)
+	if authErr.Code != mobileCodeSessionRevoked {
+		t.Fatalf("refresh after logout code = %q, want %q", authErr.Code, mobileCodeSessionRevoked)
+	}
+}
+
+func TestMobileV1RejectsLegacyTokenWithoutSid(t *testing.T) {
+	router, svc := newMobileTestEnv(t)
+	user := seedMobileUser(t, svc, "legacy", "secret-123")
+	pair, err := svc.Token.IssuePair(t.Context(), user.ID, user.Role, user.Tier)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if claims, err := svc.Token.ValidateAccessToken(pair.AccessToken); err != nil || claims.Sid != "" {
+		t.Fatalf("legacy token unexpectedly has sid: %+v err=%v", claims, err)
+	}
+
+	w := mobileJSONRequest(t, router, http.MethodGet, "/api/v1/auth/session", pair.AccessToken, nil, nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("legacy token status = %d body=%s", w.Code, w.Body.String())
+	}
+	var body mobileErrorBody
+	decodeMobileJSON(t, w, &body)
+	if body.Code != mobileCodeInvalidCredentials {
+		t.Fatalf("legacy token code = %q, want %q", body.Code, mobileCodeInvalidCredentials)
+	}
+
+	// 旧令牌仍可访问旧 API（兼容路径不能被新协议破坏）。
+	w = mobileJSONRequest(t, router, http.MethodGet, "/api/me", pair.AccessToken, nil, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("legacy token on old api status = %d body=%s", w.Code, w.Body.String())
+	}
+}
+
+func TestMobileRefreshRejectsUnboundLegacyToken(t *testing.T) {
+	router, svc := newMobileTestEnv(t)
+	user := seedMobileUser(t, svc, "bob", "secret-123")
+	pair, err := svc.Token.IssuePair(t.Context(), user.ID, user.Role, user.Tier)
+	if err != nil {
+		t.Fatal(err)
+	}
+	w := mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/refresh", "", map[string]any{
+		"refresh_token": pair.RefreshToken,
+	}, nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("legacy refresh status = %d body=%s", w.Code, w.Body.String())
+	}
+	var body mobileErrorBody
+	decodeMobileJSON(t, w, &body)
+	if body.Code != mobileCodeInvalidCredentials {
+		t.Fatalf("legacy refresh code = %q, want %q", body.Code, mobileCodeInvalidCredentials)
+	}
+}
+
+func TestMobileDeviceKickRevokesSession(t *testing.T) {
+	router, svc := newMobileTestEnv(t)
+	user := seedMobileUser(t, svc, "carol", "secret-123")
+
+	w := mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/login", "", map[string]any{
+		"username": "carol", "password": "secret-123", "device_id": "device-kick",
+		"device_name": "Kick Me", "client_name": "MeBox Android",
+	}, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("login status = %d body=%s", w.Code, w.Body.String())
+	}
+	var loginResp struct {
+		AuthSessionID string            `json:"auth_session_id"`
+		Tokens        service.TokenPair `json:"tokens"`
+	}
+	decodeMobileJSON(t, w, &loginResp)
+
+	if err := svc.Device.KickDevice(t.Context(), user.ID, "device-kick"); err != nil {
+		t.Fatalf("kick device: %v", err)
+	}
+	session, err := svc.Repo.AuthSession.FindByID(t.Context(), loginResp.AuthSessionID)
+	if err != nil || session == nil || !session.Revoked {
+		t.Fatalf("session should be revoked after device kick: %+v err=%v", session, err)
+	}
+	w = mobileJSONRequest(t, router, http.MethodGet, "/api/v1/auth/session", loginResp.Tokens.AccessToken, nil, nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("session after kick status = %d body=%s", w.Code, w.Body.String())
+	}
+}
+
+func TestMobileKickOneDeviceKeepsOtherSessions(t *testing.T) {
+	router, svc := newMobileTestEnv(t)
+	seedMobileUser(t, svc, "erin", "secret-123")
+
+	login := func(deviceID string) string {
+		w := mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/login", "", map[string]any{
+			"username": "erin", "password": "secret-123", "device_id": deviceID,
+			"device_name": deviceID, "client_name": "MeBox Android",
+		}, nil)
+		if w.Code != http.StatusOK {
+			t.Fatalf("login %s status = %d body=%s", deviceID, w.Code, w.Body.String())
+		}
+		var resp struct {
+			Tokens service.TokenPair `json:"tokens"`
+		}
+		decodeMobileJSON(t, w, &resp)
+		return resp.Tokens.AccessToken
+	}
+
+	tokenA := login("device-a")
+	tokenB := login("device-b")
+
+	if err := svc.Device.KickDevice(t.Context(), svcUserID(t, svc, "erin"), "device-a"); err != nil {
+		t.Fatalf("kick device a: %v", err)
+	}
+
+	w := mobileJSONRequest(t, router, http.MethodGet, "/api/v1/auth/session", tokenA, nil, nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Fatalf("kicked session status = %d body=%s", w.Code, w.Body.String())
+	}
+	w = mobileJSONRequest(t, router, http.MethodGet, "/api/v1/auth/session", tokenB, nil, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("other device status = %d body=%s", w.Code, w.Body.String())
+	}
+}
+
+func svcUserID(t *testing.T, svc *service.Container, username string) string {
+	t.Helper()
+	u, err := svc.Repo.User.FindByUsername(t.Context(), username)
+	if err != nil || u == nil {
+		t.Fatalf("find user %s: %v", username, err)
+	}
+	return u.ID
+}
+
+func TestMobileAuthDefaultsAndSessionExpiryShape(t *testing.T) {
+	router, svc := newMobileTestEnv(t)
+	seedMobileUser(t, svc, "dave", "secret-123")
+
+	w := mobileJSONRequest(t, router, http.MethodPost, "/api/v1/auth/login", "", map[string]any{
+		"username": "dave", "password": "secret-123", "device_id": "device-default",
+	}, nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("login status = %d body=%s", w.Code, w.Body.String())
+	}
+	var loginResp struct {
+		AuthSessionID string            `json:"auth_session_id"`
+		Tokens        service.TokenPair `json:"tokens"`
+	}
+	decodeMobileJSON(t, w, &loginResp)
+	session, err := svc.Repo.AuthSession.FindByID(t.Context(), loginResp.AuthSessionID)
+	if err != nil || session == nil {
+		t.Fatalf("load session: %v", err)
+	}
+	if session.ClientName != "MeBox Android" {
+		t.Fatalf("client_name default = %q", session.ClientName)
+	}
+	if session.ExpiresAt.Before(time.Now()) {
+		t.Fatalf("session expiry in the past: %v", session.ExpiresAt)
+	}
+	if loginResp.Tokens.TokenType != "Bearer" || loginResp.Tokens.ExpiresIn <= 0 {
+		t.Fatalf("unexpected token metadata: %+v", loginResp.Tokens)
+	}
+}

internal/handler/mobile_errors.go

@@ -0,0 +1,129 @@
+package handler
+
+import (
+	"net/http"
+	"strconv"
+	"strings"
+	"unicode"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+
+	"github.com/truewhile/MeBox/internal/middleware"
+)
+
+// 移动端 v1 错误码。新增错误码必须同步 OpenAPI 与 App 的 ApiErrorMapper。
+const (
+	mobileCodeInvalidArgument       = "INVALID_ARGUMENT"
+	mobileCodeInvalidCredentials    = "INVALID_CREDENTIALS"
+	mobileCodeTokenExpired          = "TOKEN_EXPIRED"
+	mobileCodeSessionRevoked        = "SESSION_REVOKED"
+	mobileCodeAccountDisabled       = "ACCOUNT_DISABLED"
+	mobileCodeAccountExpired        = "ACCOUNT_EXPIRED"
+	mobileCodePermissionDenied      = "PERMISSION_DENIED"
+	mobileCodeProfilePINRequired    = "PROFILE_PIN_REQUIRED"
+	mobileCodeRateLimited           = "RATE_LIMITED"
+	mobileCodeUpstreamUnavailable   = "UPSTREAM_UNAVAILABLE"
+	mobileCodeTranscodeBusy         = "TRANSCODE_BUSY"
+	mobileCodePlaybackSessionAbsent = "PLAYBACK_SESSION_NOT_FOUND"
+	mobileCodeResourceExpired       = "RESOURCE_EXPIRED"
+	mobileCodeProgressConflict      = "PROGRESS_CONFLICT"
+	mobileCodeServiceUnavailable    = "SERVICE_UNAVAILABLE"
+)
+
+const (
+	mobileCtxRequestID    = "mobile_request_id"
+	mobileCtxAuthSession  = "mobile_auth_session"
+	mobileRequestIDHeader = "X-Request-ID"
+)
+
+// mobileErrorBody 是 v1 统一错误响应。字段直接位于顶层，便于客户端按
+// code 分流，不需要再判断后端历史包装层。
+type mobileErrorBody struct {
+	Code          string `json:"code"`
+	Message       string `json:"message"`
+	RequestID     string `json:"request_id"`
+	Retryable     bool   `json:"retryable"`
+	RetryAfterSec int    `json:"retry_after_sec,omitempty"`
+	Details       any    `json:"details,omitempty"`
+}
+
+// mobileRequestIDMiddleware 为每个 v1 请求绑定可追踪的请求 ID。
+// 合法客户端值会沿用（便于 App 与服务端日志对齐），非法或过长则由服务器
+// 重新生成；该值仅用于诊断，绝不参与鉴权。
+func mobileRequestIDMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		id := strings.TrimSpace(c.GetHeader(mobileRequestIDHeader))
+		if !validRequestID(id) {
+			id = uuid.NewString()
+		}
+		c.Set(mobileCtxRequestID, id)
+		c.Header(mobileRequestIDHeader, id)
+		c.Next()
+	}
+}
+
+func validRequestID(id string) bool {
+	if len(id) < 8 || len(id) > 128 {
+		return false
+	}
+	for _, r := range id {
+		if r > unicode.MaxASCII {
+			return false
+		}
+		if unicode.IsLetter(r) || unicode.IsDigit(r) {
+			continue
+		}
+		switch r {
+		case '-', '_', '.', ':':
+			continue
+		default:
+			return false
+		}
+	}
+	return true
+}
+
+func currentMobileRequestID(c *gin.Context) string {
+	if c == nil {
+		return ""
+	}
+	if v, ok := c.Get(mobileCtxRequestID); ok {
+		if s, ok := v.(string); ok && s != "" {
+			return s
+		}
+	}
+	return ""
+}
+
+// writeMobileError 输出统一错误体。request_id 缺失时现场生成，保证所有
+// v1 错误都可用于对账，而不是只在注册了中间件的路由上才有。
+func writeMobileError(c *gin.Context, status int, code, message string, retryable bool, retryAfterSec int) {
+	requestID := currentMobileRequestID(c)
+	if requestID == "" {
+		requestID = uuid.NewString()
+		c.Header(mobileRequestIDHeader, requestID)
+	}
+	if retryAfterSec > 0 {
+		c.Header("Retry-After", strconv.Itoa(retryAfterSec))
+	}
+	c.AbortWithStatusJSON(status, mobileErrorBody{
+		Code:          code,
+		Message:       message,
+		RequestID:     requestID,
+		Retryable:     retryable,
+		RetryAfterSec: retryAfterSec,
+	})
+}
+
+// mobileRateLimit 与旧端点共用 RateLimiter，但返回 v1 错误契约和 Retry-After。
+func mobileRateLimit(limiter *middleware.RateLimiter) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if !limiter.Allow(c.ClientIP()) {
+			writeMobileError(c, http.StatusTooManyRequests, mobileCodeRateLimited,
+				"too many requests, please try again later", true, 60)
+			return
+		}
+		c.Next()
+	}
+}

internal/handler/mobile_routes.go

@@ -0,0 +1,81 @@
+package handler
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/middleware"
+	"github.com/truewhile/MeBox/internal/service"
+)
+
+// registerMobileRoutes 挂载 /api/v1 移动端稳定契约。
+//
+// 既有 /api 与 Emby 入口保持不变；v1 只做适配和会话语义补强，不复制媒体
+// 或书源业务逻辑。
+func registerMobileRoutes(api *gin.RouterGroup, svc *service.Container, log *zap.Logger) {
+	if svc == nil || svc.ServerIdentity == nil || svc.AuthSessions == nil {
+		// 最小容器（例如旧测试桩）没有身份/会话服务时，不暴露不可用的 v1。
+		return
+	}
+	wireAuthSessionValidator(svc)
+
+	v1 := api.Group("/v1")
+	v1.Use(mobileRequestIDMiddleware())
+
+	v1.GET("/server-info", mobileServerInfoHandler(svc, log))
+
+	authLimiter := middleware.NewRateLimiter(30, time.Minute)
+	v1.POST("/auth/login", mobileRateLimit(authLimiter), mobileLoginHandler(svc, log))
+	v1.POST("/auth/refresh", mobileRefreshHandler(svc, log))
+
+	authed := v1.Group("/auth")
+	{
+		authed.GET("/session", mobileAuthRequired(svc), mobileSessionHandler(svc))
+		authed.POST("/logout", mobileLogoutAuthRequired(svc), mobileLogoutHandler(svc))
+	}
+}
+
+// wireAuthSessionValidator 让旧 /api 中间件也能校验新令牌的 sid。
+// service 层错误在这里映射为 middleware 的两个哨兵，避免包依赖反转。
+func wireAuthSessionValidator(svc *service.Container) {
+	middleware.SetSessionValidator(func(ctx context.Context, sessionID, userID string) error {
+		if svc == nil || svc.AuthSessions == nil {
+			return nil
+		}
+		_, err := svc.AuthSessions.Validate(ctx, sessionID, userID)
+		if err == nil {
+			return nil
+		}
+		if errors.Is(err, service.ErrAuthSessionRevoked) ||
+			errors.Is(err, service.ErrAuthSessionExpired) ||
+			errors.Is(err, service.ErrAuthSessionRequired) {
+			return middleware.ErrSessionRevoked
+		}
+		return fmt.Errorf("%w: %v", middleware.ErrSessionUnavailable, err)
+	})
+}
+
+func mobileServerInfoHandler(svc *service.Container, log *zap.Logger) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		ctx, cancel := context.WithTimeout(c.Request.Context(), 5*time.Second)
+		defer cancel()
+		info, err := svc.ServerIdentity.Info(ctx, service.CurrentServerCapabilities(svc))
+		if err != nil {
+			if log != nil {
+				log.Warn("mobile server info failed", zap.Error(err))
+			}
+			writeMobileError(c, http.StatusServiceUnavailable, mobileCodeServiceUnavailable,
+				"server identity temporarily unavailable", true, 2)
+			return
+		}
+		// 身份信息随配置变化且不应被中间缓存：同一地址可能切换部署实例。
+		c.Header("Cache-Control", "no-store")
+		c.JSON(http.StatusOK, info)
+	}
+}

internal/handler/playback_extra.go

@@ -51,11 +51,53 @@ func playbackInfoHandler(svc *service.Container) gin.HandlerFunc {
 			// 远程 Emby 挂载没有本地文件，不能提供转码地址。STRM 默认直连，直连失败时可走 HLS。
 			hlsURL = ""
 		}
-		c.JSON(http.StatusOK, gin.H{
+		// 起播路径原本还要各发一次 /playback/{id}/resume 和
+		// /media/{id}/subtitles。把这两份数据并进播放地址响应后，移动端起播
+		// 只剩一个请求 —— 跨境链路上每多一条连接就多一次 DNS/TLS 建连，
+		// 实测单次建连可到数秒。老客户端不读这两个字段，行为不变。
+		uid, _ := c.Get(middleware.CtxUserID)
+		resumePayload := gin.H{"position_ms": int64(0), "duration_ms": int64(0), "completed": false}
+		if svc.Playback != nil {
+			if row, err := svc.Playback.GetProgress(c.Request.Context(), toString(uid), m.ID); err == nil && row != nil {
+				resumePayload = gin.H{
+					"position_ms": row.PositionMs,
+					"duration_ms": row.DurationMs,
+					"completed":   row.Completed,
+				}
+			}
+		}
+		// 直连播放只需要外挂字幕；内嵌字幕由播放器从容器里解。
+		subtitles := []service.SubtitleTrack{}
+		if svc.Subtitle != nil && !(svc.EmbyRemote != nil && service.IsEmbyRemoteID(m.ID)) {
+			if discovered, err := svc.Subtitle.DiscoverExternalOnly(c.Request.Context(), m.ID); err == nil && discovered != nil {
+				subtitles = discovered
+			}
+		}
+		// 能在服务端换链就把最终直链一并返回：客户端直接连 CDN，省掉
+		// /api/stream 的 302 往返。跨境/高延迟链路上，这一跳等于一次完整的
+		// DNS + TCP + TLS，实测能到数秒，正好压在起播关键路径上。
+		// 换链失败、本地文件或需要服务端加头的网盘保持原样，客户端仍走
+		// stream_url 跳转，行为与改动前一致。
+		directURL, hasDirectURL := "", false
+		if svc.Stream != nil {
+			// `?refresh=1`：客户端手上的直链已失效（CDN 403），要求丢掉缓存
+			// 重新换链，别把同一条死链再发一次。
+			if strings.EqualFold(strings.TrimSpace(c.Query("refresh")), "1") {
+				service.InvalidateMediaLinkCache(m)
+			}
+			directURL, hasDirectURL = svc.Stream.ResolveDirectPlayURL(c.Request, m)
+		}
+		payload := gin.H{
 			"media":      m,
 			"stream_url": "/api/stream/" + m.ID + "?token=" + url.QueryEscape(token) + profileQuery,
 			"hls_url":    hlsURL,
-		})
+			"resume":     resumePayload,
+			"subtitles":  subtitles,
+		}
+		if hasDirectURL {
+			payload["direct_url"] = directURL
+		}
+		c.JSON(http.StatusOK, payload)
 	}
 }
 

internal/handler/playback_extra_test.go

@@ -22,6 +22,7 @@ import (
 	"github.com/truewhile/MeBox/internal/model"
 	"github.com/truewhile/MeBox/internal/repository"
 	"github.com/truewhile/MeBox/internal/service"
+	"github.com/truewhile/MeBox/internal/service/cloud"
 )
 
 func TestExternalURLUsesMediaScopedPlaybackToken(t *testing.T) {
@@ -435,6 +436,10 @@ func TestPlaybackInfoForSTRMMediaIncludesHLS(t *testing.T) {
 	var payload struct {
 		StreamURL string `json:"stream_url"`
 		HlsURL    string `json:"hls_url"`
+		// 移动端起播只打这一个接口：resume / subtitles 必须始终存在，
+		// 哪怕是默认值，否则客户端会退回额外两个请求。
+		Resume     *struct{ PositionMs int64 `json:"position_ms"` } `json:"resume"`
+		Subtitles  *[]struct{}                                     `json:"subtitles"`
 	}
 	if err := json.Unmarshal(w.Body.Bytes(), &payload); err != nil {
 		t.Fatalf("decode: %v", err)
@@ -445,6 +450,66 @@ func TestPlaybackInfoForSTRMMediaIncludesHLS(t *testing.T) {
 	if payload.HlsURL == "" || !strings.Contains(payload.HlsURL, "/api/hls/media-1/") {
 		t.Fatalf("expected strm hls_url, got %q", payload.HlsURL)
 	}
+	if payload.Resume == nil {
+		t.Fatalf("playback info must always carry resume (got body=%s)", w.Body.String())
+	}
+	if payload.Subtitles == nil {
+		t.Fatalf("playback info must always carry subtitles (got body=%s)", w.Body.String())
+	}
+}
+
+// 服务端能换到最终直链时，播放地址响应要把直链一并给客户端：移动端起播就能
+// 跳过 /api/stream 的 302 往返（跨境链路上等于一次完整 DNS+TCP+TLS）。
+func TestPlaybackInfoCarriesPrefetchedDirectURL(t *testing.T) {
+	router, svc, secret := newPlaybackScopeTestRouter(t)
+	loginToken := signedTestToken(t, secret)
+	const direct = "https://cdnfhnfile.115cdn.net/637b/Movie.mkv?t=1&k=sig"
+	var gotUA string
+	svc.Stream.SetStrmPlayTargetResolver(func(_ context.Context, _, userAgent string) (*service.StrmPlayResult, error) {
+		gotUA = userAgent
+		return &service.StrmPlayResult{
+			RedirectURL: direct,
+			Link:        &cloud.DirectLink{URL: direct, Headers: map[string]string{"User-Agent": userAgent}},
+		}, nil
+	})
+	if err := svc.Repo.DB.Create(&model.Media{
+		Base:        model.Base{ID: "media-direct"},
+		LibraryID:   "lib-1",
+		Title:       "Direct",
+		Path:        "cloud://cloud115/Movie.mkv",
+		Container:   "strm",
+		DurationSec: 3600,
+		STRMURL:     "/api/strm/play/cloud115/video.mkv?acct=a1&pickcode=pc1",
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	req := httptest.NewRequest(http.MethodGet, "http://nas.local/api/playback/media-direct/info", nil)
+	req.Header.Set("Authorization", "Bearer "+loginToken)
+	req.Header.Set("User-Agent", "MeBox-Android/0.1.0")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d body=%s", w.Code, w.Body.String())
+	}
+	var payload struct {
+		DirectURL string `json:"direct_url"`
+		StreamURL string `json:"stream_url"`
+	}
+	if err := json.Unmarshal(w.Body.Bytes(), &payload); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	if payload.DirectURL != direct {
+		t.Fatalf("direct_url = %q, want %q (body=%s)", payload.DirectURL, direct, w.Body.String())
+	}
+	if !strings.Contains(payload.StreamURL, "/api/stream/media-direct") {
+		t.Fatalf("stream_url must stay as the fallback, got %q", payload.StreamURL)
+	}
+	// 115 直链绑定换取时的 UA：预置直链必须按播放器的 UA 换，否则播放会 403。
+	if gotUA != "MeBox-Android/0.1.0" {
+		t.Fatalf("resolver UA = %q, want the client UA", gotUA)
+	}
 }
 
 func TestSubtitleListOnlyProbesEmbeddedTracksForHLS(t *testing.T) {

internal/handler/reader_routes.go

@@ -14,6 +14,7 @@ import (
 	"github.com/truewhile/MeBox/internal/model"
 	"github.com/truewhile/MeBox/internal/service"
 	"github.com/truewhile/MeBox/internal/service/reader"
+	readerrule "github.com/truewhile/MeBox/internal/service/reader/rule"
 )
 
 func registerReaderRoutes(authed *gin.RouterGroup, svc *service.Container) {
@@ -77,6 +78,8 @@ func registerReaderRoutes(authed *gin.RouterGroup, svc *service.Container) {
 	g.GET("/books/:id/chapters", readerListChaptersHandler(svc))
 	g.POST("/books/:id/chapters", readerReplaceChaptersHandler(svc))
 	g.GET("/books/:id/content", readerBookContentHandler(svc))
+	// 批量取正文（离线缓存协议，对应 legado CacheBook）：返回每章内容与命中统计
+	g.POST("/books/:id/content-batch", readerBookContentBatchHandler(svc))
 
 	// 替换净化规则
 	g.GET("/replace-rules", readerListReplaceRulesHandler(svc))
@@ -87,7 +90,8 @@ func registerReaderRoutes(authed *gin.RouterGroup, svc *service.Container) {
 
 func readerListSourcesHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
-		sources, err := svc.Reader.ListSources(c.Request.Context())
+		userID := c.GetString(middleware.CtxUserID)
+		sources, err := svc.Reader.ListSources(c.Request.Context(), userID)
 		if err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return
@@ -105,7 +109,8 @@ func readerImportSourcesHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
-		imported, err := svc.Reader.ImportSources(c.Request.Context(), body.Text)
+		userID := c.GetString(middleware.CtxUserID)
+		imported, err := svc.Reader.ImportSources(c.Request.Context(), userID, body.Text)
 		if err != nil {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
@@ -123,7 +128,8 @@ func readerUpdateSourceHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": "enabled 字段必填"})
 			return
 		}
-		if err := svc.Reader.UpdateSourceEnabled(c.Request.Context(), c.Param("id"), *body.Enabled); err != nil {
+		userID := c.GetString(middleware.CtxUserID)
+		if err := svc.Reader.UpdateSourceEnabled(c.Request.Context(), userID, c.Param("id"), *body.Enabled); err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return
 		}
@@ -133,7 +139,8 @@ func readerUpdateSourceHandler(svc *service.Container) gin.HandlerFunc {
 
 func readerDeleteSourceHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
-		if err := svc.Reader.DeleteSource(c.Request.Context(), c.Param("id")); err != nil {
+		userID := c.GetString(middleware.CtxUserID)
+		if err := svc.Reader.DeleteSource(c.Request.Context(), userID, c.Param("id")); err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return
 		}
@@ -150,7 +157,8 @@ func readerDebugSourceHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
-		logs, err := svc.Reader.Debug(c.Request.Context(), c.Param("id"), body.Key)
+		userID := c.GetString(middleware.CtxUserID)
+		logs, err := svc.Reader.Debug(c.Request.Context(), userID, c.Param("id"), body.Key)
 		if err != nil {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
@@ -315,7 +323,8 @@ func readerBrowserAssetHandler(svc *service.Container) gin.HandlerFunc {
 
 func readerSourceLogoutHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
-		if err := svc.Reader.ClearSourceLogin(c.Request.Context(), c.Param("id")); err != nil {
+		userID := c.GetString(middleware.CtxUserID)
+		if err := svc.Reader.ClearSourceLogin(c.Request.Context(), userID, c.Param("id")); err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return
 		}
@@ -332,7 +341,8 @@ func readerSetSourceVariableHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
-		if err := svc.Reader.SetSourceVariable(c.Request.Context(), c.Param("id"), body.Variable); err != nil {
+		userID := c.GetString(middleware.CtxUserID)
+		if err := svc.Reader.SetSourceVariable(c.Request.Context(), userID, c.Param("id"), body.Variable); err != nil {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
@@ -349,7 +359,8 @@ func readerSetSourceLoginInfoHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
-		if err := svc.Reader.SetSourceLoginInfo(c.Request.Context(), c.Param("id"), body.Fields); err != nil {
+		userID := c.GetString(middleware.CtxUserID)
+		if err := svc.Reader.SetSourceLoginInfo(c.Request.Context(), userID, c.Param("id"), body.Fields); err != nil {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
@@ -370,7 +381,8 @@ func readerSearchHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
-		books, skipped, err := svc.Reader.Search(c.Request.Context(), body.Key, body.SourceIDs, body.Page)
+		userID := c.GetString(middleware.CtxUserID)
+		books, skipped, err := svc.Reader.Search(c.Request.Context(), userID, body.Key, body.SourceIDs, body.Page)
 		if err != nil {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
@@ -389,6 +401,10 @@ func readerBookInfoHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
+		// 声明了封面解密的书源：详情封面也要走解密代理（尚未入库，按书源 URL 签）。
+		if info != nil {
+			info.CoverURL = svc.Reader.RewriteBookCover(c.Request.Context(), "", c.Query("source_url"), info.CoverURL)
+		}
 		c.JSON(http.StatusOK, info)
 	}
 }
@@ -435,6 +451,10 @@ func readerListBooksHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return
 		}
+		// 封面解密代理只在下发时改写：库里仍存原始地址，换源/换签名密钥后不会失效。
+		for i := range books {
+			books[i].CoverURL = svc.Reader.RewriteBookCover(c.Request.Context(), books[i].ID, books[i].Origin, books[i].CoverURL)
+		}
 		c.JSON(http.StatusOK, gin.H{"books": books})
 	}
 }
@@ -819,12 +839,37 @@ func readerMediaProxyHandler(svc *service.Container) gin.HandlerFunc {
 			c.JSON(http.StatusBadRequest, gin.H{"error": "仅支持 http(s) 媒体地址"})
 			return
 		}
+		// 封面解密代理（d=cover）：签名主体可能是书源 URL（搜索结果尚未入库）。
+		// 封面不读取书籍正文，因此不需要书籍记录；统一整段读取后解密下发。
+		if c.Query("d") == "cover" {
+			resp, fetchErr := svc.Reader.FetchCover(c.Request.Context(), bookID, rawURL)
+			if fetchErr != nil {
+				c.JSON(http.StatusBadGateway, gin.H{"error": "封面拉取失败: " + fetchErr.Error()})
+				return
+			}
+			defer resp.Body.Close()
+			data, readErr := io.ReadAll(io.LimitReader(resp.Body, readerImageDecodeMaxBytes+1))
+			if readErr != nil || len(data) > readerImageDecodeMaxBytes {
+				c.JSON(http.StatusBadGateway, gin.H{"error": "封面过大或读取失败"})
+				return
+			}
+			decoded := svc.Reader.DecodeCoverBytes(c.Request.Context(), bookID, rawURL, data)
+			contentType := resp.Header.Get("Content-Type")
+			if contentType == "" {
+				contentType = http.DetectContentType(decoded)
+			}
+			c.Data(resp.StatusCode, contentType, decoded)
+			return
+		}
 		book, err := svc.Reader.GetBook(c.Request.Context(), bookID)
 		if err != nil {
 			c.JSON(http.StatusNotFound, gin.H{"error": "书籍不存在"})
 			return
 		}
-		resp, err := svc.Reader.FetchMedia(c.Request.Context(), book, rawURL, c.GetHeader("Range"))
+		// 图片地址可自带 ",{headers:{...}}" 选项段：拆分后 headers 逐图应用，
+		// 代理地址里只保留不带选项的地址（见 ProxyURL）。
+		rawURL, mediaOptions, _ := readerrule.ParseMediaOptions(rawURL)
+		resp, err := svc.Reader.FetchMediaWithOptions(c.Request.Context(), book, rawURL, c.GetHeader("Range"), mediaOptions.Headers)
 		if err != nil {
 			c.JSON(http.StatusBadGateway, gin.H{"error": "媒体拉取失败: " + err.Error()})
 			return
@@ -832,13 +877,51 @@ func readerMediaProxyHandler(svc *service.Container) gin.HandlerFunc {
 		defer resp.Body.Close()
 
 		ct := resp.Header.Get("Content-Type")
-		isPlaylist := strings.Contains(ct, "mpegurl") || strings.Contains(ct, "m3u8") ||
-			strings.HasSuffix(strings.ToLower(rawURL), ".m3u8")
-		if isPlaylist {
-			// m3u8：改写分片/密钥地址为签名代理后返回，hls.js 无感续播
-			data, _ := io.ReadAll(io.LimitReader(resp.Body, 4<<20))
-			rewritten := svc.Reader.RewritePlaylist(bookID, rawURL, string(data))
-			c.Data(http.StatusOK, "application/vnd.apple.mpegurl", []byte(rewritten))
+		// 书源声明了 imageDecode 时，图片字节需要服务端二次解密。
+		// 这类响应必须整段读取后处理，不再支持 Range（解密后长度会变）。
+		if decodeJS := svc.Reader.ImageDecodeRule(c.Request.Context(), book); decodeJS != "" && !isMediaPlaylistRequest(resp) {
+			sniffed, readErr := io.ReadAll(io.LimitReader(resp.Body, readerImageDecodeMaxBytes+1))
+			if readErr != nil || len(sniffed) > readerImageDecodeMaxBytes {
+				c.JSON(http.StatusBadGateway, gin.H{"error": "图片过大或读取失败"})
+				return
+			}
+			decoded, decErr := svc.Reader.DecodeImageBytes(c.Request.Context(), book, rawURL, false, sniffed)
+			if decErr != nil {
+				c.JSON(http.StatusBadGateway, gin.H{"error": "图片解密失败: " + decErr.Error()})
+				return
+			}
+			contentType := ct
+			if contentType == "" {
+				contentType = http.DetectContentType(decoded)
+			}
+			c.Data(resp.StatusCode, contentType, decoded)
+			return
+		}
+		// m3u8 判定不能只看 Content-Type 或 URL 后缀：上游经常把播放列表标成
+		// application/octet-stream，或者地址是 /index.m3u8?token=...（后缀判断不命中）。
+		// 先读一小段用 #EXTM3U 标记确认；不是播放列表就把这段拼回响应体继续流式透传。
+		//
+		// 只嗅探 200 的 GET：206 的体是二进制分片、HEAD 没有体，都不需要判断。
+		if c.Request.Method == http.MethodGet && resp.StatusCode == http.StatusOK {
+			head, readErr := io.ReadAll(io.LimitReader(resp.Body, 64<<10))
+			if readErr == nil && reader.BodyIsPlaylist(head, ct) {
+				rest, _ := io.ReadAll(io.LimitReader(resp.Body, 4<<20))
+				rewritten := svc.Reader.RewritePlaylist(bookID, rawURL, string(head)+string(rest))
+				c.Data(http.StatusOK, "application/vnd.apple.mpegurl", []byte(rewritten))
+				return
+			}
+			// 不是播放列表：透传时 Content-Length 可能因为已经读过一部分而失配，
+			// 直接省略交给 net/http 按 chunked 处理，避免少写/多写导致截断。
+			for _, h := range []string{"Content-Type", "Content-Range", "Accept-Ranges"} {
+				if v := resp.Header.Get(h); v != "" {
+					c.Header(h, v)
+				}
+			}
+			c.Status(resp.StatusCode)
+			if len(head) > 0 {
+				_, _ = c.Writer.Write(head)
+			}
+			_, _ = io.Copy(c.Writer, resp.Body)
 			return
 		}
 		// 流式透传（含 206 Partial Content，支持音频拖动进度）
@@ -852,6 +935,22 @@ func readerMediaProxyHandler(svc *service.Container) gin.HandlerFunc {
 	}
 }
 
+// readerImageDecodeMaxBytes 需要服务端解密的单张图片上限。
+const readerImageDecodeMaxBytes = 32 << 20
+
+// isMediaPlaylistRequest 判断响应是否可能已是 HLS 播放列表。
+// 播放列表太小、不该走图片解密分支（书源的 imageDecode 只会用于图片）。
+func isMediaPlaylistRequest(resp *http.Response) bool {
+	ct := strings.ToLower(resp.Header.Get("Content-Type"))
+	return strings.Contains(ct, "mpegurl")
+}
+
+// readerBodyIsPlaylist 判断上游响应体是否是 HLS 播放列表。
+// 以 #EXTM3U 标记为准：Content-Type 只是辅助（上游常标成 octet-stream）。
+func readerBodyIsPlaylist(head []byte, contentType string) bool {
+	return reader.BodyIsPlaylist(head, contentType)
+}
+
 // readerLocalAssetHandler 本地书籍内嵌资源（EPUB 图片等）：
 // 鉴权走 HMAC 签名（<img src> 带不上 JWT），与 /reader/media 同一套做法。
 func readerLocalAssetHandler(svc *service.Container) gin.HandlerFunc {
@@ -940,3 +1039,32 @@ func readerBookContentHandler(svc *service.Container) gin.HandlerFunc {
 		c.JSON(http.StatusOK, content)
 	}
 }
+
+// readerBookContentBatchHandler 批量取正文（对应 legado CacheBook / getContentBatch）。
+//
+// 请求 {chapter_indexes:[...], apply_replace:bool}：单章失败不中断整批，
+// 返回每章内容与 hit/miss/failed 统计，供前端窗口预取与后续离线缓存。
+func readerBookContentBatchHandler(svc *service.Container) gin.HandlerFunc {
+	var body struct {
+		ChapterIndexes []int `json:"chapter_indexes" binding:"required"`
+		// ApplyReplace 是否在服务端应用用户替换净化规则（默认 false，与单章接口一致）。
+		ApplyReplace bool `json:"apply_replace"`
+	}
+	return func(c *gin.Context) {
+		if err := c.ShouldBindJSON(&body); err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "chapter_indexes 不能为空"})
+			return
+		}
+		if len(body.ChapterIndexes) > 64 {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "一次最多请求 64 章"})
+			return
+		}
+		userID := c.GetString(middleware.CtxUserID)
+		result, err := svc.Reader.GetContentBatch(c.Request.Context(), userID, c.Param("id"), body.ChapterIndexes, body.ApplyReplace)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+		c.JSON(http.StatusOK, result)
+	}
+}

internal/handler/routes_admin.go

@@ -50,6 +50,7 @@ func registerAdminStrmRoutes(admin *gin.RouterGroup, svc *service.Container) {
 	// Emby 挂载管理：远程 Emby 媒体库挂载（账号复用 strm/accounts）
 	admin.GET("/emby/accounts/:id/views", embyAccountViewsHandler(svc))
 	admin.POST("/emby/accounts/:id/full-mount", fullMountEmbyAccountHandler(svc))
+	admin.PUT("/emby/accounts/:id/mounts/enabled", setEmbyMountsEnabledHandler(svc))
 	admin.GET("/emby/mounts", listEmbyMountsHandler(svc))
 	admin.POST("/emby/mounts", createEmbyMountsHandler(svc))
 	admin.PUT("/emby/mounts/reorder", reorderEmbyMountsHandler(svc))

internal/handler/stream_emby_remote_redirect_test.go

@@ -0,0 +1,200 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/glebarez/sqlite"
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+	"github.com/truewhile/MeBox/internal/service"
+)
+
+// 首页轮播/剧集卡片交给播放器的是「整部剧」的伪装 ID，它自身没有媒体源：远程 Emby
+// 对它的取流请求会回 500（Unable to cast 'Series' to 'IHasMediaSources'）。这里锁定
+// 播放接口的行为——改投第一集，且客户端原有的查询参数（token / profile / proxy）
+// 必须原样带过去，否则播放器跟过去之后会掉鉴权。
+func TestStreamRedirectsRemoteContainerToPlayableEpisode(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		switch r.URL.Path {
+		case "/emby/Users/uid-1/Items/series-100":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Id": "series-100", "Name": "某部新番", "Type": "Series", "IsFolder": true,
+			})
+		case "/emby/Users/uid-1/Items":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Items": []map[string]any{
+					map[string]any{
+						"Id": "ep-1", "Name": "第1集", "Type": "Episode", "SeriesId": "series-100",
+						"ParentIndexNumber": 1, "IndexNumber": 1,
+						"MediaSources": []any{map[string]any{"Id": "ep-1-src"}},
+					},
+				},
+			})
+		default:
+			w.WriteHeader(http.StatusNotFound)
+		}
+	}))
+	defer upstream.Close()
+
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.AutoMigrate(
+		&model.User{}, &model.UserPermission{}, &model.Setting{}, &model.Library{}, &model.Media{},
+		&model.StrmAccount{}, &model.EmbyMount{},
+	); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	cfg := &config.Config{}
+	cfg.Secrets.JWTSecret = "stream-redirect-secret"
+	log := zap.NewNop()
+
+	remote := service.NewEmbyRemoteService(cfg, log, repos, service.NewCryptoService("", log))
+	svc := &service.Container{Cfg: cfg, Repo: repos, EmbyRemote: remote}
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            upstream.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	if err := repos.StrmAccount.Create(t.Context(), &model.StrmAccount{
+		Base:     model.Base{ID: "acct-1"},
+		Name:     "远程 Emby",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	if err := repos.EmbyMount.Create(t.Context(), &model.EmbyMount{
+		Base:           model.Base{ID: "mount-1"},
+		AccountID:      "acct-1",
+		RemoteViewID:   "view-1",
+		RemoteViewName: "新番连载",
+		CollectionType: "tvshows",
+		Enabled:        true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	router := gin.New()
+	router.GET("/api/stream/:id", streamHandler(svc))
+
+	req := httptest.NewRequest(
+		http.MethodGet,
+		"/api/stream/"+service.EncodeEmbyRemoteID("mount-1", "series-100")+"?token=tok-1&profile=p-1",
+		nil,
+	)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusFound {
+		t.Fatalf("status = %d body=%s, want 302", w.Code, w.Body.String())
+	}
+	want := "/api/stream/" + service.EncodeEmbyRemoteID("mount-1", "ep-1") + "?token=tok-1&profile=p-1"
+	if got := w.Header().Get("Location"); got != want {
+		t.Fatalf("Location = %q, want %q", got, want)
+	}
+}
+
+// 本身可播的远程条目（单集/电影）不能被改写，必须照原样进入原来的代理/直连分支。
+func TestStreamKeepsPlayableRemoteItem(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	var streamCalls int
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		switch r.URL.Path {
+		case "/emby/Users/uid-1/Items/ep-1":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Id": "ep-1", "Name": "第1集", "Type": "Episode", "SeriesId": "series-100",
+				"ParentIndexNumber": 1, "IndexNumber": 1,
+				"MediaSources": []any{map[string]any{"Id": "ep-1-src"}},
+			})
+		case "/emby/Videos/ep-1/stream":
+			streamCalls++
+			w.Header().Set("Content-Type", "video/mp4")
+			w.WriteHeader(http.StatusOK)
+			_, _ = w.Write([]byte("bytes"))
+		default:
+			w.WriteHeader(http.StatusNotFound)
+		}
+	}))
+	defer upstream.Close()
+
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.AutoMigrate(
+		&model.User{}, &model.UserPermission{}, &model.Setting{}, &model.Library{}, &model.Media{},
+		&model.StrmAccount{}, &model.EmbyMount{},
+	); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	cfg := &config.Config{}
+	cfg.Secrets.JWTSecret = "stream-keep-secret"
+	log := zap.NewNop()
+
+	remote := service.NewEmbyRemoteService(cfg, log, repos, service.NewCryptoService("", log))
+	emby := service.NewEmbyService(cfg, log, repos).SetEmbyRemote(remote)
+	svc := &service.Container{Cfg: cfg, Repo: repos, EmbyRemote: remote, Emby: emby}
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            upstream.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	if err := repos.StrmAccount.Create(t.Context(), &model.StrmAccount{
+		Base:     model.Base{ID: "acct-1"},
+		Name:     "远程 Emby",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	// proxy_play=true：直接走反向代理分支，便于断言确实取到了流。
+	if err := repos.EmbyMount.Create(t.Context(), &model.EmbyMount{
+		Base:           model.Base{ID: "mount-1"},
+		AccountID:      "acct-1",
+		RemoteViewID:   "view-1",
+		RemoteViewName: "新番连载",
+		CollectionType: "tvshows",
+		ProxyPlay:      true,
+		Enabled:        true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	router := gin.New()
+	router.GET("/api/stream/:id", streamHandler(svc))
+
+	req := httptest.NewRequest(http.MethodGet, "/api/stream/"+service.EncodeEmbyRemoteID("mount-1", "ep-1"), nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d body=%s, want 200", w.Code, w.Body.String())
+	}
+	if got := w.Body.String(); got != "bytes" {
+		t.Fatalf("body = %q, want the proxied stream", got)
+	}
+	if streamCalls != 1 {
+		t.Fatalf("upstream stream calls = %d, want 1", streamCalls)
+	}
+}

internal/helper/http.go

@@ -17,6 +17,13 @@ import (
 // defaultUserAgent 是默认浏览器 User-Agent（用于 HTTP 请求头）。
 const defaultUserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36"
 
+// maxDecompressedBody 解压后的响应体上限。
+//
+// 调用方只限制了压缩前的字节数（例如 reader 的 8MiB），而高压缩比响应可以
+// 放大几个数量级：一个几 MB 的 gzip 就能在解压时把内存吃光。这里统一兜底，
+// 超过上限时按解压失败处理（原样返回压缩字节，由调用方报错）。
+const maxDecompressedBody = 32 << 20
+
 // DecompressBody 兜底解压响应体（gzip / deflate）。
 //
 // 正常情况下用不到：只要不显式设置 Accept-Encoding，net/http 会自己带上 gzip
@@ -37,17 +44,20 @@ func DecompressBody(resp *http.Response, data []byte) []byte {
 			return data
 		}
 		defer r.Close()
-		if out, err := io.ReadAll(r); err == nil {
+		// 不吞掉多个 member：默认 Multistream(true) 会让串接的 member 继续解，
+		// 是压缩炸弹的常见放大手段。
+		r.Multistream(false)
+		if out, ok := readLimited(r); ok {
 			return out
 		}
 	case "deflate":
 		// deflate 有两种实际写法：zlib 包装与裸 DEFLATE，依次尝试。
-		if out, err := io.ReadAll(flate.NewReader(bytes.NewReader(data))); err == nil {
+		if out, ok := readLimited(flate.NewReader(bytes.NewReader(data))); ok {
 			return out
 		}
 		if zr, err := zlib.NewReader(bytes.NewReader(data)); err == nil {
 			defer zr.Close()
-			if out, err := io.ReadAll(zr); err == nil {
+			if out, ok := readLimited(zr); ok {
 				return out
 			}
 		}
@@ -55,6 +65,15 @@ func DecompressBody(resp *http.Response, data []byte) []byte {
 	return data
 }
 
+// readLimited 读取解压流，超过上限返回 ok=false。
+func readLimited(r io.Reader) ([]byte, bool) {
+	out, err := io.ReadAll(io.LimitReader(r, maxDecompressedBody+1))
+	if err != nil || len(out) > maxDecompressedBody {
+		return nil, false
+	}
+	return out, true
+}
+
 // StripAcceptEncoding 移除显式设置的 Accept-Encoding，交回 net/http 管理。
 //
 // 只有「调用方没设置」时 net/http 才会自动解压，因此任何来源（预设头、书源

internal/middleware/auth.go

@@ -17,6 +17,8 @@ type Claims struct {
 	Tier    string `json:"tier,omitempty"`
 	Purpose string `json:"purpose,omitempty"`
 	MediaID string `json:"media_id,omitempty"`
+	// Sid 是设备认证会话 ID；旧令牌为空，继续走兼容路径。
+	Sid string `json:"sid,omitempty"`
 	jwt.RegisteredClaims
 }
 
@@ -44,6 +46,19 @@ func AuthRequired(secret string) gin.HandlerFunc {
 			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"code": 40304, "message": "token scope denied"})
 			return
 		}
+		// 新协议令牌携带 sid：旧 API 也必须检查会话是否已被撤销，否则
+		// 设备被踢后仍能用未过期的 JWT 访问 /api/*。
+		if sid := strings.TrimSpace(claims.Sid); sid != "" {
+			if err := ValidateAuthSession(c.Request.Context(), sid, claims.UserID); err != nil {
+				if errors.Is(err, ErrSessionUnavailable) {
+					c.AbortWithStatusJSON(http.StatusServiceUnavailable, gin.H{"code": 50303, "message": "auth session unavailable"})
+					return
+				}
+				c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"code": 40104, "message": "auth session revoked"})
+				return
+			}
+			c.Set(CtxAuthSessionID, sid)
+		}
 		syncAccessTokenCookie(c, raw, claims)
 		c.Set(CtxUserID, claims.UserID)
 		c.Set(CtxUserRole, claims.Role)
@@ -151,3 +166,8 @@ func extractToken(c *gin.Context) string {
 	}
 	return ""
 }
+
+// ExtractToken 暴露令牌提取逻辑给需要自定义错误契约的移动端中间件。
+func ExtractToken(c *gin.Context) string {
+	return extractToken(c)
+}

internal/middleware/auth_session.go

@@ -0,0 +1,48 @@
+package middleware
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"sync"
+)
+
+// 会话校验错误。service 层把自己的错误映射到这两个哨兵，避免 middleware
+// 依赖 service 包（auth 服务已经依赖 middleware 的上下文键）。
+var (
+	// ErrSessionRevoked 表示会话已撤销、已过期或不存在：客户端应重新登录。
+	ErrSessionRevoked = errors.New("auth session revoked")
+	// ErrSessionUnavailable 表示暂时无法完成会话校验：客户端应稍后重试。
+	ErrSessionUnavailable = errors.New("auth session unavailable")
+)
+
+// SessionValidator 校验认证会话是否仍属于该用户。
+type SessionValidator func(ctx context.Context, sessionID, userID string) error
+
+var (
+	sessionValidatorMu sync.RWMutex
+	sessionValidator   SessionValidator
+)
+
+// SetSessionValidator 注册全局会话校验器；传 nil 表示关闭校验（旧装配路径）。
+func SetSessionValidator(fn SessionValidator) {
+	sessionValidatorMu.Lock()
+	defer sessionValidatorMu.Unlock()
+	sessionValidator = fn
+}
+
+// ValidateAuthSession 使用已注册的校验器检查 sid。未注册校验器时放行，
+// 以保持旧测试和嵌入式调用的兼容行为。
+func ValidateAuthSession(ctx context.Context, sessionID, userID string) error {
+	sessionID = strings.TrimSpace(sessionID)
+	if sessionID == "" {
+		return nil
+	}
+	sessionValidatorMu.RLock()
+	fn := sessionValidator
+	sessionValidatorMu.RUnlock()
+	if fn == nil {
+		return nil
+	}
+	return fn(ctx, sessionID, userID)
+}

internal/middleware/middleware.go

@@ -9,6 +9,8 @@ const (
 	CtxUserTier     = "ctx_user_tier"
 	CtxTokenPurpose = "ctx_token_purpose"
 	CtxTokenMediaID = "ctx_token_media_id"
+	// CtxAuthSessionID 保存已校验的设备认证会话 ID（新协议令牌才有）。
+	CtxAuthSessionID = "ctx_auth_session_id"
 
 	// AccessTokenCookieName carries the web access token for browser-managed
 	// resource requests such as <img>, which cannot attach Authorization.

internal/model/auth_session.go

@@ -0,0 +1,49 @@
+package model
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// AuthSession 是可撤销的设备认证会话。
+//
+// 会话与刷新令牌的关系是 1:N：一次登录创建一个会话，之后每次轮换刷新
+// 令牌都继续归属同一会话。访问令牌通过 JWT 的 sid 字段引用会话，因此
+// 服务端可以在 JWT 尚未过期时立即撤销某台设备的访问能力。
+//
+// 旧客户端没有会话关联（sid 为空），继续走既有兼容路径；本模型不强制
+// 把历史刷新令牌绑定到任何设备。
+type AuthSession struct {
+	ID            string     `gorm:"primaryKey;size:36" json:"id"`
+	UserID        string     `gorm:"index;size:36;not null" json:"user_id"`
+	DeviceID      string     `gorm:"index:idx_auth_session_device,priority:1;size:128;not null" json:"device_id"`
+	DeviceName    string     `gorm:"size:128" json:"device_name,omitempty"`
+	ClientName    string     `gorm:"size:64" json:"client_name,omitempty"`
+	ClientVersion string     `gorm:"size:64" json:"client_version,omitempty"`
+	Revoked       bool       `gorm:"not null;default:false" json:"revoked"`
+	RevokedAt     *time.Time `json:"revoked_at,omitempty"`
+	LastUsedAt    time.Time  `json:"last_used_at"`
+	ExpiresAt     time.Time  `gorm:"index" json:"expires_at"`
+	CreatedAt     time.Time  `json:"created_at"`
+	UpdatedAt     time.Time  `json:"updated_at"`
+}
+
+// BeforeCreate 生成 UUID 主键。
+func (s *AuthSession) BeforeCreate(_ *gorm.DB) error {
+	if s.ID == "" {
+		s.ID = uuid.NewString()
+	}
+	return nil
+}
+
+// IsExpired 判断会话是否超过最长有效期。
+func (s *AuthSession) IsExpired() bool {
+	return s != nil && !s.ExpiresAt.IsZero() && time.Now().After(s.ExpiresAt)
+}
+
+// IsValid 判断会话当前是否可继续使用。
+func (s *AuthSession) IsValid() bool {
+	return s != nil && !s.Revoked && !s.IsExpired()
+}

internal/model/library_media.go

@@ -26,13 +26,17 @@ type LibraryRoot struct {
 // Media 是单个可播放项。剧集链接到 SeriesID；电影 SeriesID == ""。
 type Media struct {
 	Base
-	LibraryID       string  `gorm:"index;size:36;index:idx_media_library_release,priority:1" json:"library_id"`
-	LibraryRootID   string  `gorm:"index;size:36" json:"library_root_id,omitempty"`
-	SeriesID        string  `gorm:"index;size:128" json:"series_id,omitempty"`
-	Title           string  `gorm:"size:255;not null" json:"title"`
-	OriginalName    string  `gorm:"size:255" json:"original_name,omitempty"`
-	EpisodeTitle    string  `gorm:"size:255" json:"episode_title,omitempty"`
-	Path            string  `gorm:"uniqueIndex;size:1024;not null" json:"path"`
+	LibraryID     string `gorm:"index;size:36;index:idx_media_library_release,priority:1" json:"library_id"`
+	LibraryRootID string `gorm:"index;size:36" json:"library_root_id,omitempty"`
+	SeriesID      string `gorm:"index;size:128" json:"series_id,omitempty"`
+	Title         string `gorm:"size:255;not null" json:"title"`
+	OriginalName  string `gorm:"size:255" json:"original_name,omitempty"`
+	EpisodeTitle  string `gorm:"size:255" json:"episode_title,omitempty"`
+	// Path 的唯一性由 database 包按方言显式建索引，这里刻意不用 uniqueIndex：
+	// PostgreSQL 的 btree 单条索引项上限 2704 字节，而 varchar(1024) 在中文路径
+	// 下可达 3072 字节，直接对整列建唯一索引会让长路径的扫描插入直接失败
+	// （SQLite 没有这个限制）。见 database.ensureMediaPathIndex。
+	Path            string  `gorm:"size:1024;not null" json:"path"`
 	RelativePath    string  `gorm:"size:1024" json:"relative_path,omitempty"`
 	SizeBytes       int64   `json:"size_bytes"`
 	DurationSec     int     `json:"duration_sec"`

internal/model/model.go

@@ -49,6 +49,7 @@ func AllModels() []interface{} {
 		&APIConfig{},
 		&UserPermission{},
 		&RefreshToken{},
+		&AuthSession{},
 		&PlayProfile{},
 		&RegistrationCode{},
 		&SignIn{},
@@ -65,6 +66,7 @@ func AllModels() []interface{} {
 		&ReaderSourceState{},
 		&ReaderBook{},
 		&ReaderChapter{},
+		&ReaderContentCache{},
 		&ReaderReplaceRule{},
 		&ReaderProfile{},
 		&ReaderBookGroups{},

internal/model/reader.go

@@ -8,12 +8,19 @@ import (
 )
 
 // ReaderBookSource 书源：原始 JSON 全量存储 + 常用字段冗余列出便于筛选排序。
+//
+// 书源按用户独立：同一份书源不同用户可以各存一份（各自启停、排序、修改规则与变量），
+// 互不可见。唯一键是 (user_id, source_url)；跨用户的「同一本书」靠
+// ReaderBook.Origin（书源 URL）而不是书源行 ID 关联。
 type ReaderBookSource struct {
 	Base
+	// UserID 归属用户。历史数据迁移时会回填；值为空表示「旧版全局书源」，
+	// 只在没有任何用户引用时才会出现。
+	UserID         string     `gorm:"type:varchar(36);uniqueIndex:uniq_reader_source_user_url;index" json:"user_id"`
 	Name           string     `gorm:"type:varchar(255);index" json:"name"`
 	GroupName      string     `gorm:"type:varchar(255);index" json:"group"`
 	Type           int        `gorm:"default:0" json:"type"` // 0文本 1音频 2图片 3文件 4视频
-	SourceURL      string     `gorm:"type:varchar(512);index" json:"source_url"`
+	SourceURL      string     `gorm:"type:varchar(512);uniqueIndex:uniq_reader_source_user_url;index" json:"source_url"`
 	RawJSON        string     `gorm:"type:text" json:"-"`
 	Enabled        bool       `gorm:"default:true" json:"enabled"`
 	EnabledExplore bool       `gorm:"default:true" json:"enabled_explore"`
@@ -98,6 +105,45 @@ type ReaderChapter struct {
 	Tag      string `gorm:"type:varchar(255)" json:"tag"`
 }
 
+// ReaderContentCache 正文持久缓存的索引行（内容本体在磁盘上，见 reader_content_cache.go）。
+//
+// 与 legado BookHelp 的章节正文缓存对应：缓存的是「书源侧产物」（书源 replaceRegex
+// 之后、用户替换规则与代理改写之前），因此可以跨用户共享；用户维度的处理在读出后
+// 逐请求应用，规则改动即时生效。
+//
+// 章节身份不落库为外键，而是 BookKey（书源 + 书本地址）与 ChapterKey（绝对化章节
+// 地址或标题）的哈希：目录刷新（ReplaceChapters 物理重建、行 ID 会变）与书源更新
+// 之后仍然能按同一身份命中或迁移。
+type ReaderContentCache struct {
+	Base
+	// OriginHash 书源地址哈希（磁盘目录的第一层，清理时定位文件用）。
+	OriginHash string `gorm:"type:varchar(64)" json:"origin_hash"`
+	// BookKey 书源身份哈希（sha256(origin + "\0" + bookURL) 前 16 字节 hex）。
+	BookKey string `gorm:"type:varchar(64);index:idx_reader_content_book" json:"book_key"`
+	// ChapterKey 章节身份哈希（绝对化 URL 优先，退化为 title）。
+	ChapterKey string `gorm:"type:varchar(64);index:idx_reader_content_chapter" json:"chapter_key"`
+	// ChapterIdentity 章节身份原文（便于诊断与 remap 时的标题兜底匹配）。
+	ChapterIdentity string `gorm:"type:varchar(512)" json:"chapter_identity"`
+	// ChapterIndex 保存时的章节序号（remap 时更新）。
+	ChapterIndex int `json:"chapter_index"`
+	// ContentType text / audio / image。
+	ContentType string `gorm:"type:varchar(16)" json:"content_type"`
+	// SourceHash 书源内容指纹（RawJSON 哈希）：书源更新后自然失效。
+	SourceHash string `gorm:"type:varchar(64)" json:"source_hash"`
+	// FormatVersion 缓存载荷格式版本：解析管线语义变化时递增，旧条目自然失效。
+	FormatVersion int `json:"format_version"`
+	// SizeBytes 载荷字节数（容量统计用）。
+	SizeBytes int64 `json:"size_bytes"`
+	// AssetCount 音频轨/图片张数（清单类内容的完整性统计）。
+	AssetCount int `json:"asset_count"`
+	// ExpiresAt 过期时间（unix 秒）；0 表示不过期。
+	ExpiresAt int64 `json:"expires_at"`
+	// LastAccessAt 最近命中时间（unix 秒），LRU 淘汰依据。
+	LastAccessAt int64 `json:"last_access_at"`
+	// Hits 命中次数（诊断用）。
+	Hits int `json:"hits"`
+}
+
 // ReaderReplaceRule 替换净化规则（对应 legado ReplaceRule）。
 type ReaderReplaceRule struct {
 	Base

internal/model/refresh_token.go

@@ -11,12 +11,14 @@ import (
 // RefreshToken 用于双令牌认证机制中的刷新令牌。
 // 存储时使用 SHA256 哈希，原始令牌不存储。
 type RefreshToken struct {
-	ID        string    `gorm:"primaryKey;size:36" json:"id"`
-	UserID    string    `gorm:"index;size:36;not null" json:"user_id"`
-	TokenHash string    `gorm:"uniqueIndex;size:128;not null" json:"-"`
-	ExpiresAt time.Time `gorm:"index" json:"expires_at"`
-	CreatedAt time.Time `json:"created_at"`
-	Revoked   bool      `gorm:"default:false" json:"revoked"`
+	ID        string `gorm:"primaryKey;size:36" json:"id"`
+	UserID    string `gorm:"index;size:36;not null" json:"user_id"`
+	TokenHash string `gorm:"uniqueIndex;size:128;not null" json:"-"`
+	// AuthSessionID 关联移动端设备会话。旧数据为空，继续按既有兼容路径使用。
+	AuthSessionID string    `gorm:"index;size:36" json:"auth_session_id,omitempty"`
+	ExpiresAt     time.Time `gorm:"index" json:"expires_at"`
+	CreatedAt     time.Time `json:"created_at"`
+	Revoked       bool      `gorm:"default:false" json:"revoked"`
 }
 
 // BeforeCreate 生成 UUID。

internal/repository/auth_session_repository.go

@@ -0,0 +1,101 @@
+package repository
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// AuthSessionRepository persists model.AuthSession records.
+type AuthSessionRepository struct{ db *gorm.DB }
+
+// Create inserts a new authentication session.
+func (r *AuthSessionRepository) Create(ctx context.Context, s *model.AuthSession) error {
+	return withSQLiteBusyRetry(ctx, func() error {
+		return r.db.WithContext(ctx).Create(s).Error
+	})
+}
+
+// FindByID returns the session or (nil, nil) when absent.
+func (r *AuthSessionRepository) FindByID(ctx context.Context, id string) (*model.AuthSession, error) {
+	if id == "" {
+		return nil, nil
+	}
+	var s model.AuthSession
+	err := withSQLiteBusyRetry(ctx, func() error {
+		s = model.AuthSession{}
+		return r.db.WithContext(ctx).Where("id = ?", id).First(&s).Error
+	})
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &s, nil
+}
+
+// TouchLastUsed 更新会话最近使用时间。
+func (r *AuthSessionRepository) TouchLastUsed(ctx context.Context, id string, at time.Time) error {
+	return withSQLiteBusyRetry(ctx, func() error {
+		return r.db.WithContext(ctx).Model(&model.AuthSession{}).
+			Where("id = ? AND revoked = ?", id, false).
+			Update("last_used_at", at).Error
+	})
+}
+
+// Revoke 撤销单个会话（幂等）。
+func (r *AuthSessionRepository) Revoke(ctx context.Context, id string, at time.Time) error {
+	return withSQLiteBusyRetry(ctx, func() error {
+		return r.db.WithContext(ctx).Model(&model.AuthSession{}).
+			Where("id = ? AND revoked = ?", id, false).
+			Updates(map[string]any{"revoked": true, "revoked_at": at}).Error
+	})
+}
+
+// RevokeByUser 撤销某用户的全部会话（幂等）。
+func (r *AuthSessionRepository) RevokeByUser(ctx context.Context, userID string, at time.Time) error {
+	return withSQLiteBusyRetry(ctx, func() error {
+		return r.db.WithContext(ctx).Model(&model.AuthSession{}).
+			Where("user_id = ? AND revoked = ?", userID, false).
+			Updates(map[string]any{"revoked": true, "revoked_at": at}).Error
+	})
+}
+
+// RevokeByDevice 撤销某用户某设备关联的全部会话（幂等）。
+func (r *AuthSessionRepository) RevokeByDevice(ctx context.Context, userID, deviceID string, at time.Time) error {
+	return withSQLiteBusyRetry(ctx, func() error {
+		return r.db.WithContext(ctx).Model(&model.AuthSession{}).
+			Where("user_id = ? AND device_id = ? AND revoked = ?", userID, deviceID, false).
+			Updates(map[string]any{"revoked": true, "revoked_at": at}).Error
+	})
+}
+
+// ListActiveByUser 返回某用户当前有效（未撤销、未过期）的会话。
+func (r *AuthSessionRepository) ListActiveByUser(ctx context.Context, userID string) ([]model.AuthSession, error) {
+	var rows []model.AuthSession
+	err := withSQLiteBusyRetry(ctx, func() error {
+		rows = nil
+		return r.db.WithContext(ctx).
+			Where("user_id = ? AND revoked = ? AND expires_at > ?", userID, false, time.Now()).
+			Order("last_used_at desc, created_at desc").
+			Find(&rows).Error
+	})
+	return rows, err
+}
+
+// ListByDevice 返回某用户某设备的全部会话，用于踢出设备时逐个撤销。
+func (r *AuthSessionRepository) ListByDevice(ctx context.Context, userID, deviceID string) ([]model.AuthSession, error) {
+	var rows []model.AuthSession
+	err := withSQLiteBusyRetry(ctx, func() error {
+		rows = nil
+		return r.db.WithContext(ctx).
+			Where("user_id = ? AND device_id = ?", userID, deviceID).
+			Find(&rows).Error
+	})
+	return rows, err
+}

internal/repository/dialect.go

@@ -0,0 +1,21 @@
+package repository
+
+import "gorm.io/gorm"
+
+// LikeOperator 返回当前方言下「与 SQLite LIKE 行为一致」的模式匹配运算符。
+//
+// SQLite 的 LIKE 对 ASCII 不区分大小写（默认编译选项），PostgreSQL 的 LIKE 区分
+// 大小写、只有 ILIKE 才不区分。同一个搜索词在两种方言下必须给出同样的结果集，
+// 否则换库之后「inception」就再也搜不到「Inception」。
+//
+// 供构造原始 SQL 片段的调用方（含 service 层）使用。
+func LikeOperator(db *gorm.DB) string {
+	return likeOperator(db)
+}
+
+func likeOperator(db *gorm.DB) string {
+	if db != nil && db.Dialector != nil && db.Dialector.Name() == "postgres" {
+		return "ILIKE"
+	}
+	return "LIKE"
+}

internal/repository/dialect_test.go

@@ -0,0 +1,54 @@
+package repository
+
+import (
+	"strings"
+	"testing"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+// TestSegmentPrewarmQueryBindsBooleanFound 守住 PostgreSQL 下片段预取查询的合法性。
+//
+// media_segment_fetches.found 是布尔列，而 PostgreSQL 没有 boolean = integer
+// 运算符：写成 f.found = 0 / = 1 会让计划任务里的片段预取固定报
+//
+//	operator does not exist: boolean = integer (SQLSTATE 42883)
+//
+// SQLite 一直能跑，所以这个错只在 PostgreSQL 上暴露（表现为日志里周期性出现
+// 该错误、片头片尾数据永远补不上）。这里断言语句里只能出现占位符绑定。
+func TestSegmentPrewarmQueryBindsBooleanFound(t *testing.T) {
+	query := segmentPrewarmCandidatesQuery
+	lower := strings.ToLower(query)
+	for _, forbidden := range []string{"found = 0", "found = 1", "found=0", "found=1", "found = true", "found = false"} {
+		if strings.Contains(lower, forbidden) {
+			t.Fatalf("预取查询把布尔列与字面量比较（%q），PostgreSQL 会直接报错：\n%s", forbidden, query)
+		}
+	}
+	if got := strings.Count(query, "f.found = ?"); got != 2 {
+		t.Fatalf("expected 2 placeholder-bound found comparisons, got %d:\n%s", got, query)
+	}
+}
+
+// TestLikeOperatorMatchesSQLiteCaseInsensitivity 守住搜索大小写行为的方言差异。
+//
+// SQLite 的 LIKE 对 ASCII 不区分大小写，PostgreSQL 的 LIKE 区分大小写：同一个
+// 搜索词在两种方言下必须给出同样的结果集，PostgreSQL 必须走 ILIKE。
+func TestLikeOperatorMatchesSQLiteCaseInsensitivity(t *testing.T) {
+	pg, err := gorm.Open(postgres.New(postgres.Config{
+		DSN: "postgres://mebox:mebox@127.0.0.1:5432/mebox?sslmode=disable",
+	}), &gorm.Config{
+		DryRun:                 true,
+		DisableAutomaticPing:   true,
+		SkipDefaultTransaction: true,
+	})
+	if err != nil {
+		t.Fatalf("open dry-run postgres: %v", err)
+	}
+	if got := LikeOperator(pg); got != "ILIKE" {
+		t.Fatalf("postgres LikeOperator = %q, want ILIKE", got)
+	}
+	if got := LikeOperator(nil); got != "LIKE" {
+		t.Fatalf("nil LikeOperator = %q, want LIKE", got)
+	}
+}

internal/repository/emby_mount_repository.go

@@ -3,6 +3,7 @@ package repository
 import (
 	"context"
 	"errors"
+	"strings"
 	"time"
 
 	"gorm.io/gorm"
@@ -89,6 +90,22 @@ func (r *EmbyMountRepository) SetSortOrder(ctx context.Context, ids []string) er
 	})
 }
 
+// SetEnabledByAccountID 批量设置账号下全部挂载的启用状态。
+func (r *EmbyMountRepository) SetEnabledByAccountID(ctx context.Context, accountID string, enabled bool) (int64, error) {
+	var affected int64
+	if strings.TrimSpace(accountID) == "" {
+		return 0, nil
+	}
+	err := withSQLiteBusyRetry(ctx, func() error {
+		res := r.db.WithContext(ctx).Model(&model.EmbyMount{}).
+			Where("account_id = ?", accountID).
+			Updates(map[string]any{"enabled": enabled, "updated_at": time.Now()})
+		affected = res.RowsAffected
+		return res.Error
+	})
+	return affected, err
+}
+
 func (r *EmbyMountRepository) CountByAccountID(ctx context.Context, accountID string) (int64, error) {
 	var count int64
 	err := r.db.WithContext(ctx).Model(&model.EmbyMount{}).Where("account_id = ?", accountID).Count(&count).Error

internal/repository/history_repository.go

@@ -33,6 +33,20 @@ func (r *HistoryRepository) UpsertProgress(ctx context.Context, h *model.Playbac
 	return r.upsert(ctx, h, true)
 }
 
+// historyColumn 生成「当前表」限定的列引用。
+//
+// PostgreSQL 的 ON CONFLICT DO UPDATE ... WHERE 里，未限定的列名会同时可解析到
+// 目标表和本次插入的行，于是报
+//
+//	column reference "session_started_at_ms" is ambiguous (SQLSTATE 42702)
+//
+// 结果是 POST /api/history 一律 500，观看进度与续播完全存不下来。SQLite 不做这项
+// 检查，所以这个错只在 PostgreSQL 上暴露。clause.CurrentTable 由 GORM 在构建语句
+// 时替换成真实表名，两种方言都能正确渲染。
+func historyColumn(name string) clause.Column {
+	return clause.Column{Table: clause.CurrentTable, Name: name}
+}
+
 func (r *HistoryRepository) upsert(ctx context.Context, h *model.PlaybackHistory, versioned bool) error {
 	updates := playbackHistoryAssignments(h)
 	if versioned {
@@ -49,16 +63,16 @@ func (r *HistoryRepository) upsert(ctx context.Context, h *model.PlaybackHistory
 		onConflict.Where = clause.Where{Exprs: []clause.Expression{
 			clause.Or(
 				clause.Lt{
-					Column: clause.Column{Name: "session_started_at_ms"},
+					Column: historyColumn("session_started_at_ms"),
 					Value:  h.SessionStartedAtMs,
 				},
 				clause.And(
 					clause.Eq{
-						Column: clause.Column{Name: "session_started_at_ms"},
+						Column: historyColumn("session_started_at_ms"),
 						Value:  h.SessionStartedAtMs,
 					},
 					clause.Lte{
-						Column: clause.Column{Name: "sequence"},
+						Column: historyColumn("sequence"),
 						Value:  h.Sequence,
 					},
 				),

internal/repository/history_repository_dialect_test.go

@@ -0,0 +1,65 @@
+package repository
+
+import (
+	"context"
+	"strings"
+	"testing"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// TestHistoryProgressUpsertQualifiesConflictWhereColumns 守住 PostgreSQL 下进度上报
+// 的 upsert 语句合法性。
+//
+// ON CONFLICT DO UPDATE 的 WHERE 里如果不给列名加表限定，PostgreSQL 会因为这些列
+// 同时出现在本次插入的行里而拒绝该语句：
+//
+//	column reference "session_started_at_ms" is ambiguous (SQLSTATE 42702)
+//
+// 后果是 POST /api/history 全部 500，观看进度与续播完全存不下来。SQLite 不做这项
+// 检查（旧写法在 SQLite 下一直正常），所以只能在 PostgreSQL 方言下断言。
+func TestHistoryProgressUpsertQualifiesConflictWhereColumns(t *testing.T) {
+	repos, rec := newPostgresDryRunRepos(t)
+	ctx := context.Background()
+
+	if err := repos.History.UpsertProgress(ctx, &model.PlaybackHistory{
+		UserID:             "u-1",
+		MediaID:            "m-1",
+		PositionMs:         1_000,
+		DurationMs:         2_000,
+		SessionID:          "session-1",
+		SessionStartedAtMs: 111,
+		Sequence:           2,
+	}); err != nil {
+		t.Fatalf("build upsert: %v", err)
+	}
+
+	sql := rec.all()
+	if strings.TrimSpace(sql) == "" {
+		t.Fatal("no SQL captured from UpsertProgress")
+	}
+	if !strings.Contains(sql, "ON CONFLICT") {
+		t.Fatalf("expected an ON CONFLICT upsert, got:\n%s", sql)
+	}
+
+	// 只看 ON CONFLICT 之后的部分：SET 的赋值目标和 CASE 里的 duration_ms 引用
+	// 属于另一套语法规则，不在这里断言。
+	conflict := sql[strings.Index(sql, "ON CONFLICT"):]
+	whereIdx := strings.Index(conflict, " WHERE ")
+	if whereIdx < 0 {
+		t.Fatalf("ON CONFLICT clause has no DO UPDATE ... WHERE guard:\n%s", sql)
+	}
+	where := conflict[whereIdx:]
+
+	for _, want := range []string{
+		`"playback_histories"."session_started_at_ms"`,
+		`"playback_histories"."sequence"`,
+	} {
+		if !strings.Contains(where, want) {
+			t.Fatalf("DO UPDATE WHERE is missing the table-qualified %s; it is ambiguous on PostgreSQL:\n%s", want, sql)
+		}
+	}
+	if strings.Contains(where, `("session_started_at_ms"`) || strings.Contains(where, ` AND "sequence"`) {
+		t.Fatalf("DO UPDATE WHERE still references unqualified columns:\n%s", sql)
+	}
+}

internal/repository/media_repository.go

@@ -63,38 +63,38 @@ type MediaQueryFilter struct {
 
 func applyMediaQueryFilter(q *gorm.DB, filter MediaQueryFilter) *gorm.DB {
 	if !filter.IncludeNSFW {
-		q = q.Where("nsfw = ?", false)
+		q = q.Where("media.nsfw = ?", false)
 	}
 	if len(filter.HiddenLibraryIDs) > 0 {
-		q = q.Where("library_id NOT IN ?", filter.HiddenLibraryIDs)
+		q = q.Where("media.library_id NOT IN ?", filter.HiddenLibraryIDs)
 	}
 	if len(filter.AllowedLibraryIDs) > 0 {
-		q = q.Where("library_id IN ?", filter.AllowedLibraryIDs)
+		q = q.Where("media.library_id IN ?", filter.AllowedLibraryIDs)
 	}
 	if libraryID := strings.TrimSpace(filter.LibraryID); libraryID != "" {
-		q = q.Where("library_id = ?", libraryID)
+		q = q.Where("media.library_id = ?", libraryID)
 	}
 	if seriesID := strings.TrimSpace(filter.SeriesID); seriesID != "" {
-		q = q.Where("series_id = ?", seriesID)
+		q = q.Where("media.series_id = ?", seriesID)
 	}
 	if len(filter.Genres) > 0 {
 		q = q.Where(genreMatchClause(filter.Genres), genreMatchArgs(filter.Genres)...)
 	}
 	if filter.YearMin > 0 {
-		q = q.Where("year >= ?", filter.YearMin)
+		q = q.Where("media.year >= ?", filter.YearMin)
 	}
 	if filter.YearMax > 0 {
-		q = q.Where("year <= ?", filter.YearMax)
+		q = q.Where("media.year <= ?", filter.YearMax)
 	}
 	if filter.RatingMin > 0 {
-		q = q.Where("rating >= ?", filter.RatingMin)
+		q = q.Where("media.rating >= ?", filter.RatingMin)
 	}
 	if filter.UnwatchedOnly {
 		userID := strings.TrimSpace(filter.UnwatchedUserID)
 		// 没有用户上下文时忽略该条件：否则会把整个库筛成空，看起来像「坏了」。
 		if userID != "" {
 			q = q.Where(
-				"id NOT IN (SELECT media_id FROM playback_histories WHERE user_id = ? AND completed = ?)",
+				"media.id NOT IN (SELECT media_id FROM playback_histories WHERE user_id = ? AND completed = ?)",
 				userID, true,
 			)
 		}
@@ -113,7 +113,7 @@ func applyMediaQueryFilter(q *gorm.DB, filter MediaQueryFilter) *gorm.DB {
 func genreMatchClause(genres []string) string {
 	clauses := make([]string, 0, len(genres))
 	for range genres {
-		clauses = append(clauses, "',' || REPLACE(REPLACE(TRIM(genres), ' ', ''), '，', ',') || ',' LIKE ?")
+		clauses = append(clauses, "',' || REPLACE(REPLACE(TRIM(media.genres), ' ', ''), '，', ',') || ',' LIKE ?")
 	}
 	return "(" + strings.Join(clauses, " OR ") + ")"
 }
@@ -122,7 +122,7 @@ func genreMatchClause(genres []string) string {
 //
 // 必须与 genreMatchClause 的列端处理完全对称：
 //   - TRIM                   → TrimSpace
-//   - REPLACE(…, ' ', '')    → ReplaceAll(…, " ", "")   ← 多词类型（如 "Science Fiction"）
+//   - REPLACE(…, ' ', ”)    → ReplaceAll(…, " ", "")   ← 多词类型（如 "Science Fiction"）
 //   - REPLACE(…, '，', ',')  → ReplaceAll(…, "，", ",")
 func genreMatchArgs(genres []string) []any {
 	args := make([]any, 0, len(genres))

internal/repository/media_repository_upsert.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 
 	"github.com/truewhile/MeBox/internal/model"
 )
@@ -95,6 +96,9 @@ func (r *MediaRepository) UpsertBatchWithAliases(ctx context.Context, items []Me
 
 // indexByIDBestEffort 在事务提交后按 ID 回读最新行并同步搜索索引。
 func (r *MediaRepository) indexByIDBestEffort(ctx context.Context, ids []string) {
+	if _, ok := r.searchBackend.(MediaSearchSyncBackend); !ok {
+		return
+	}
 	for _, id := range ids {
 		if id == "" {
 			continue
@@ -115,7 +119,12 @@ func (r *MediaRepository) upsertWithDB(ctx context.Context, db *gorm.DB, m *mode
 		return m.ID, nil
 	}
 
-	updates := mediaUpsertUpdates(existing, *m)
+	// 孤儿行回收：原库已被删除时（DeleteLibrary 硬删库行；扫描与删除并发时扫描也会
+	// 把行写回已删库），这条行会钉死在不存在的 library_id 上。media.path 是全局唯一
+	// 索引，重扫既插不进同路径新行，又因 LibraryID 非空而拒绝迁移归属，于是新库/重建库
+	// 永远查不到这些条目（表现为"扫描明明有文件，库却是空的"）。这里显式识别并允许迁移。
+	reclaimLibrary := r.mediaRowLibraryIsOrphaned(ctx, db, existing.LibraryID, m.LibraryID, m.Path)
+	updates := mediaUpsertUpdates(existing, *m, reclaimLibrary)
 	if adopted {
 		updates["path"] = m.Path
 		if existing.DeletedAt.Valid {
@@ -139,6 +148,42 @@ func (r *MediaRepository) upsertWithDB(ctx context.Context, db *gorm.DB, m *mode
 	return existing.ID, nil
 }
 
+// mediaRowLibraryIsOrphaned reports whether a media row is still pinned to a
+// library that no longer exists.
+//
+// 删除媒体库会硬删库行（见 MediaService.DeleteLibrary），但扫描与删除并发时，
+// 已在途的扫描仍可能把这批文件写回已删库的 library_id；历史数据里也可能留下
+// 指向早已消失的库的行。因为 media.path 是全局唯一索引，这些行一旦存在：
+//  1. 重扫无法插入同路径的新行（唯一约束冲突）；
+//  2. addMediaPlacementUpdates 又因为 existing.LibraryID 非空而拒绝迁移归属。
+//
+// 结果就是新库 / 重建的同名库永远查不到这些条目，扫描报告有文件而库显示为空。
+// 这里把"原库已不存在"这种情况单独判定出来，交给扫描把归属迁移到当前库。
+func (r *MediaRepository) mediaRowLibraryIsOrphaned(ctx context.Context, db *gorm.DB, existingLibraryID, incomingLibraryID, incomingPath string) bool {
+	existingLibraryID = strings.TrimSpace(existingLibraryID)
+	incomingLibraryID = strings.TrimSpace(incomingLibraryID)
+	// 归属未变或原行为空（后者走既有的回填分支）时无需查库。
+	if existingLibraryID == "" || existingLibraryID == incomingLibraryID {
+		return false
+	}
+	// 云盘媒体的归属迁移由 addMediaPlacementUpdates 无条件处理，无需再查库。
+	if strings.HasPrefix(strings.ToLower(strings.TrimSpace(incomingPath)), "cloud://") {
+		return false
+	}
+	if db == nil || !db.Migrator().HasTable(&model.Library{}) {
+		return false
+	}
+	var count int64
+	// 刻意不加 Unscoped：软删除的库同样不再出现在库里，挂在它下面的媒体行
+	// 也属于"查不到"的孤儿，一并允许回收。查询失败时保守处理：宁可保留旧
+	// 归属，也不要把仍有效的库误判成孤儿。
+	if err := db.WithContext(ctx).Model(&model.Library{}).
+		Where("id = ?", existingLibraryID).Count(&count).Error; err != nil {
+		return false
+	}
+	return count == 0
+}
+
 func (r *MediaRepository) findOrCreateMediaByPath(ctx context.Context, db *gorm.DB, m *model.Media, aliasPaths []string) (model.Media, bool, bool, error) {
 	var existing model.Media
 	err := db.WithContext(ctx).Unscoped().Where("path = ?", m.Path).First(&existing).Error
@@ -152,14 +197,19 @@ func (r *MediaRepository) findOrCreateMediaByPath(ctx context.Context, db *gorm.
 		if m.ScrapeStatus == "" {
 			m.ScrapeStatus = "pending"
 		}
-		if createErr := db.WithContext(ctx).Create(m).Error; createErr == nil {
-			return *m, true, false, nil
-		} else if retryErr := db.WithContext(ctx).Unscoped().Where("path = ?", m.Path).First(&existing).Error; retryErr != nil {
-			return model.Media{}, false, false, createErr
-		} else {
-			// 并发插入竞态：重查已命中既有行，直接走更新分支。
-			return existing, false, false, nil
+		// PostgreSQL 唯一键异常会中止整个事务，之后重查也会失败。
+		// DO NOTHING 保持事务可用，并兼容 path 的表达式唯一索引。
+		result := db.WithContext(ctx).Clauses(clause.OnConflict{DoNothing: true}).Create(m)
+		if result.Error != nil {
+			return model.Media{}, false, false, result.Error
 		}
+		if result.RowsAffected > 0 {
+			return *m, true, false, nil
+		}
+		if err := db.WithContext(ctx).Unscoped().Where("path = ?", m.Path).First(&existing).Error; err != nil {
+			return model.Media{}, false, false, err
+		}
+		return existing, false, false, nil
 	}
 	if err != nil {
 		return model.Media{}, false, false, err
@@ -194,14 +244,14 @@ func (r *MediaRepository) findMediaByAlias(ctx context.Context, db *gorm.DB, cur
 	return existing, err
 }
 
-func mediaUpsertUpdates(existing, incoming model.Media) map[string]any {
+func mediaUpsertUpdates(existing, incoming model.Media, reclaimLibrary bool) map[string]any {
 	updates := map[string]any{}
 	addMediaFileScanUpdates(updates, existing, incoming)
 	addMediaTitleUpdates(updates, existing, incoming)
 	addMediaExternalIDUpdates(updates, existing, incoming)
 	addMatchedMediaMetadataUpdates(updates, existing, incoming)
 	addMediaArtworkUpdates(updates, existing, incoming)
-	addMediaPlacementUpdates(updates, existing, incoming)
+	addMediaPlacementUpdates(updates, existing, incoming, reclaimLibrary)
 	addMediaSTRMUpdate(updates, existing, incoming)
 	return updates
 }
@@ -308,13 +358,15 @@ func addMediaArtworkUpdates(updates map[string]any, existing, incoming model.Med
 	}
 }
 
-func addMediaPlacementUpdates(updates map[string]any, existing, incoming model.Media) {
+func addMediaPlacementUpdates(updates map[string]any, existing, incoming model.Media, reclaimLibrary bool) {
 	// 云盘媒体：同一 cloud:// 文件可能先被父目录库扫描入库，之后用户按二级
 	// 分类重新挂载/扫描到更精确的分类库。此时让 library_id 迁移到当前扫描库，
 	// 否则媒体被钉死在旧库、新分类库里看不到(表现为"媒体部分消失")。
-	// 本地媒体物理位置固定：仅在原 library_id 为空时回填，不迁移。
+	// 本地媒体物理位置固定：仅在原 library_id 为空、或原库已不存在（孤儿行，
+	// reclaimLibrary）时才回填/迁移，既避免把仍属于其他库的本地媒体抢走，
+	// 又能让扫描回收被删除库遗留的行。
 	if isCloudMediaPath := strings.HasPrefix(strings.ToLower(strings.TrimSpace(incoming.Path)), "cloud://"); incoming.LibraryID != "" && incoming.LibraryID != existing.LibraryID {
-		if isCloudMediaPath || existing.LibraryID == "" {
+		if isCloudMediaPath || existing.LibraryID == "" || reclaimLibrary {
 			updates["library_id"] = incoming.LibraryID
 		}
 	}

internal/repository/media_search_repository.go

@@ -6,6 +6,7 @@ import (
 	"unicode"
 
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 
 	"github.com/truewhile/MeBox/internal/model"
 )
@@ -86,7 +87,7 @@ func (r *MediaRepository) searchFilteredFTS(ctx context.Context, query string, o
 		Joins("JOIN media_search_fts ON media_search_fts.rowid = media.rowid").
 		Where("media.deleted_at IS NULL").
 		Where("media_search_fts MATCH ?", ftsQuery)
-	q = applyQualifiedMediaQueryFilter(q, filter)
+	q = applyMediaQueryFilter(q, filter)
 	if err := q.Count(&total).Error; err != nil {
 		return nil, 0, false
 	}
@@ -106,11 +107,8 @@ func (r *MediaRepository) searchFilteredLIKE(ctx context.Context, query string,
 	q := r.db.WithContext(ctx).Model(&model.Media{})
 	q = applyMediaQueryFilter(q, filter)
 	// SQLite 的 LIKE 对 ASCII 不区分大小写；Postgres 的 LIKE 区分大小写，
-	// 需用 ILIKE 保持两端搜索行为一致。
-	likeOp := "LIKE"
-	if r.db.Dialector != nil && r.db.Dialector.Name() == "postgres" {
-		likeOp = "ILIKE"
-	}
+	// 需用 ILIKE 保持两端搜索行为一致（见 dialect.go 的 likeOperator）。
+	likeOp := likeOperator(r.db)
 	terms := mediaSearchTerms(query)
 	for _, term := range terms {
 		like := "%" + escapeLike(term) + "%"
@@ -125,10 +123,10 @@ func (r *MediaRepository) searchFilteredLIKE(ctx context.Context, query string,
 	if query != "" {
 		prefix := escapeLike(query) + "%"
 		exact := query
-		q = q.Order(gorm.Expr(
+		q = q.Order(clause.OrderBy{Expression: gorm.Expr(
 			"CASE WHEN title = ? THEN 0 WHEN original_name = ? THEN 1 WHEN title "+likeOp+" ? ESCAPE '\\' THEN 2 WHEN original_name "+likeOp+" ? ESCAPE '\\' THEN 3 ELSE 4 END, created_at desc",
 			exact, exact, prefix, prefix,
-		))
+		)})
 	} else {
 		q = q.Order("created_at desc")
 	}
@@ -136,22 +134,6 @@ func (r *MediaRepository) searchFilteredLIKE(ctx context.Context, query string,
 	return items, total, err
 }
 
-func applyQualifiedMediaQueryFilter(q *gorm.DB, filter MediaQueryFilter) *gorm.DB {
-	if !filter.IncludeNSFW {
-		q = q.Where("media.nsfw = ?", false)
-	}
-	if len(filter.HiddenLibraryIDs) > 0 {
-		q = q.Where("media.library_id NOT IN ?", filter.HiddenLibraryIDs)
-	}
-	if len(filter.AllowedLibraryIDs) > 0 {
-		q = q.Where("media.library_id IN ?", filter.AllowedLibraryIDs)
-	}
-	if seriesID := strings.TrimSpace(filter.SeriesID); seriesID != "" {
-		q = q.Where("media.series_id = ?", seriesID)
-	}
-	return q
-}
-
 func mediaFTSQuery(query string) string {
 	terms := mediaSearchTerms(query)
 	if len(terms) == 0 {

internal/repository/media_segment_repository.go

@@ -86,21 +86,15 @@ func (r *MediaSegmentRepository) UpsertFetch(ctx context.Context, row *model.Med
 	return r.db.WithContext(ctx).Clauses(onConflict).Create(row).Error
 }
 
-// ListPrewarmCandidates returns media that should be refreshed from source:
-// no ledger, expired miss (fetched_at < missBefore), or expired hit (fetched_at < hitBefore).
-// Recently played items come first so hot titles recover coverage sooner.
-func (r *MediaSegmentRepository) ListPrewarmCandidates(
-	ctx context.Context,
-	source string,
-	missBefore, hitBefore time.Time,
-	limit int,
-) ([]model.Media, error) {
-	if r == nil || limit <= 0 {
-		return nil, nil
-	}
-	rows := make([]model.Media, 0, limit)
-	// 可查询：有 TMDb，且是剧集（有季集）或电影（无季集）。
-	err := r.db.WithContext(ctx).Raw(`
+// segmentPrewarmCandidatesQuery 是片段预取候选查询。
+//
+// 抽成包级常量是为了让方言相关的回归测试能直接断言语句文本：DryRun 模式下
+// GORM 不会把 Raw 语句交给 logger，无法从执行路径上捕获生成后的 SQL。
+//
+// 注意 found 必须用占位符绑定布尔值，不能写 f.found = 0 / = 1：
+// PostgreSQL 没有 boolean = integer 运算符，那样写会固定报 SQLSTATE 42883
+// （SQLite 宽容，所以只在 PostgreSQL 上暴露）。
+const segmentPrewarmCandidatesQuery = `
 SELECT m.*
 FROM media m
 LEFT JOIN media_segment_fetches f
@@ -119,11 +113,29 @@ WHERE m.deleted_at IS NULL
   )
   AND (
     f.id IS NULL
-    OR (f.found = 0 AND f.fetched_at < ?)
-    OR (f.found = 1 AND f.fetched_at < ?)
+    OR (f.found = ? AND f.fetched_at < ?)
+    OR (f.found = ? AND f.fetched_at < ?)
   )
 ORDER BY ph.last_played DESC
 LIMIT ?
-`, source, missBefore, hitBefore, limit).Scan(&rows).Error
+`
+
+// ListPrewarmCandidates returns media that should be refreshed from source:
+// no ledger, expired miss (fetched_at < missBefore), or expired hit (fetched_at < hitBefore).
+// Recently played items come first so hot titles recover coverage sooner.
+func (r *MediaSegmentRepository) ListPrewarmCandidates(
+	ctx context.Context,
+	source string,
+	missBefore, hitBefore time.Time,
+	limit int,
+) ([]model.Media, error) {
+	if r == nil || limit <= 0 {
+		return nil, nil
+	}
+	rows := make([]model.Media, 0, limit)
+	// 可查询：有 TMDb，且是剧集（有季集）或电影（无季集）。
+	err := r.db.WithContext(ctx).
+		Raw(segmentPrewarmCandidatesQuery, source, false, missBefore, true, hitBefore, limit).
+		Scan(&rows).Error
 	return rows, err
 }

internal/repository/media_series_index.go

@@ -0,0 +1,53 @@
+package repository
+
+import (
+	"context"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// MediaSeriesIndexColumns 是解析剧集归组 key 所需的全部列。
+//
+// 剧集归组（首页「最近添加」、媒体库卡片）必须看到整库每一行才能算出正确的
+// key 和集数，因此不能只用 SQL 顶端的几行。但整行扫描会把 overview、genres、
+// strm_url 这些大文本列一并读进来再丢掉：7k 行规模下驱动层的逐列 bind 占了
+// 绝大部分耗时（实测 ~60%）。这里只取归组真正用到的列，卡片代表行在选出
+// 前 N 个剧集后按 id 再补一次完整行。
+const MediaSeriesIndexColumns = "" +
+	"id, created_at, updated_at, library_id, library_root_id, series_id, " +
+	"title, original_name, path, poster_url, backdrop_url, " +
+	"year, release_date, season_num, episode_num, episode_fraction, " +
+	"tm_db_id, bangumi_id, douban_id, thetvdb_id, " +
+	"width, height, size_bytes, video_codec, audio_codec, container, nsfw"
+
+// ListMediaSeriesIndex 按 created_at 倒序返回可见媒体的「归组投影」。
+//
+// 与 SearchFiltered 的区别：
+//   - 不做 COUNT(*)（调用方不需要总数，7k 行时这一条 SQL 白跑一遍全表）；
+//   - 只 SELECT 归组所需列，避免大文本列的解码与内存拷贝。
+func (r *MediaRepository) ListMediaSeriesIndex(ctx context.Context, limit int, filter MediaQueryFilter) ([]model.Media, error) {
+	var items []model.Media
+	q := r.db.WithContext(ctx).Model(&model.Media{}).
+		Select(MediaSeriesIndexColumns).
+		Order("created_at desc")
+	q = applyMediaQueryFilter(q, filter)
+	if limit > 0 {
+		q = q.Limit(limit)
+	}
+	if err := q.Find(&items).Error; err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+// ListMediaByIDs 按 ID 批量取完整行（用于补齐剧集卡片的代表行）。
+func (r *MediaRepository) ListMediaByIDs(ctx context.Context, ids []string) ([]model.Media, error) {
+	if len(ids) == 0 {
+		return nil, nil
+	}
+	var items []model.Media
+	if err := r.db.WithContext(ctx).Where("id IN ?", ids).Find(&items).Error; err != nil {
+		return nil, err
+	}
+	return items, nil
+}

internal/repository/reader_repository.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 
 	"github.com/truewhile/MeBox/internal/model"
 )
@@ -15,10 +16,22 @@ type ReaderRepository struct {
 	db *gorm.DB
 }
 
-// ListSources 书源列表（按 customOrder 排序）。
-func (r *ReaderRepository) ListSources(ctx context.Context) ([]model.ReaderBookSource, error) {
+// readerOrderBy 组装方言安全的 ORDER BY。
+//
+// 用 clause.Column 让 GORM 按当前方言给列名加引号（SQLite 反引号 / PostgreSQL 双引号），
+// 而不是把引号硬编码进排序字符串。reader_books.order、reader_chapters.index、
+// reader_replace_rules.order 都撞上了 SQL 关键字（order 在 PostgreSQL 里是保留字）：
+// 之前写成 .Order("`order` ASC")，SQLite 下正常，PostgreSQL 下反引号被词法分析成
+// 运算符，直接报 `syntax error at or near "order"`，书架 / 目录 / 替换规则整页 500。
+func readerOrderBy(columns ...clause.OrderByColumn) clause.OrderBy {
+	return clause.OrderBy{Columns: columns}
+}
+
+// ListSources 用户的书源列表（书源按用户独立，按 customOrder 排序）。
+func (r *ReaderRepository) ListSources(ctx context.Context, userID string) ([]model.ReaderBookSource, error) {
 	var out []model.ReaderBookSource
-	err := r.db.WithContext(ctx).Order("custom_order ASC, updated_at DESC").Find(&out).Error
+	err := r.db.WithContext(ctx).Where("user_id = ?", userID).
+		Order("custom_order ASC, updated_at DESC").Find(&out).Error
 	return out, err
 }
 
@@ -31,8 +44,31 @@ func (r *ReaderRepository) GetSource(ctx context.Context, id string) (*model.Rea
 	return &out, nil
 }
 
-// GetSourceByURL 按书源 URL 取书源（导入去重用）。
-func (r *ReaderRepository) GetSourceByURL(ctx context.Context, sourceURL string) (*model.ReaderBookSource, error) {
+// GetSourceForUser 按 ID 取书源并校验归属用户。
+func (r *ReaderRepository) GetSourceForUser(ctx context.Context, userID, id string) (*model.ReaderBookSource, error) {
+	var out model.ReaderBookSource
+	if err := r.db.WithContext(ctx).First(&out, "id = ? AND user_id = ?", id, userID).Error; err != nil {
+		return nil, err
+	}
+	return &out, nil
+}
+
+// GetSourceByURL 按用户 + 书源 URL 取书源（导入去重用）。
+func (r *ReaderRepository) GetSourceByURL(ctx context.Context, userID, sourceURL string) (*model.ReaderBookSource, error) {
+	var out model.ReaderBookSource
+	err := r.db.WithContext(ctx).First(&out, "user_id = ? AND source_url = ?", userID, sourceURL).Error
+	if err != nil {
+		return nil, err
+	}
+	return &out, nil
+}
+
+// GetSourceAnyByURL 按书源 URL 取任意一份副本（不限定用户）。
+//
+// 媒体代理、目录刷新等路径只拿得到书籍的 origin（书源 URL）而没有用户上下文；
+// 请求目标由 URL 决定，任一副本都够用。多个用户各自改过规则/header 时，
+// 取到哪一份只影响「用谁的默认 header」，不影响书籍本身的定位。
+func (r *ReaderRepository) GetSourceAnyByURL(ctx context.Context, sourceURL string) (*model.ReaderBookSource, error) {
 	var out model.ReaderBookSource
 	err := r.db.WithContext(ctx).First(&out, "source_url = ?", sourceURL).Error
 	if err != nil {
@@ -41,6 +77,13 @@ func (r *ReaderRepository) GetSourceByURL(ctx context.Context, sourceURL string)
 	return &out, nil
 }
 
+// ListSourceRowsByURL 取某书源 URL 的全部副本（判断是否仍有其他用户引用）。
+func (r *ReaderRepository) ListSourceRowsByURL(ctx context.Context, sourceURL string) ([]model.ReaderBookSource, error) {
+	var out []model.ReaderBookSource
+	err := r.db.WithContext(ctx).Where("source_url = ?", sourceURL).Find(&out).Error
+	return out, err
+}
+
 // CreateSource 新增书源。
 func (r *ReaderRepository) CreateSource(ctx context.Context, src *model.ReaderBookSource) error {
 	return r.db.WithContext(ctx).Create(src).Error
@@ -52,20 +95,34 @@ func (r *ReaderRepository) UpdateSource(ctx context.Context, src *model.ReaderBo
 }
 
 // DeleteSource 删除书源（连带清理其会话状态）。
+//
+// 用物理删除而不是软删：唯一键是 (user_id, source_url)，而索引会覆盖软删行——
+// 软删后再导入同一书源会撞唯一约束（表现为「导入失败」），删掉再导入是本模块的
+// 正常操作。书源本身是可重新导入的数据，不需要软删保留。
+//
+// 会话状态表仍按 source_url 一源一条（跨用户共享），因此只有在该 URL 已无任何
+// 其他用户的书源副本时才连带清理，否则会把别人的登录态一起删掉。
 func (r *ReaderRepository) DeleteSource(ctx context.Context, id string) error {
 	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		src := &model.ReaderBookSource{}
 		if err := tx.First(src, "id = ?", id).Error; err == nil && src.SourceURL != "" {
-			// 会话状态是「一源一条」，而 source_url 上有覆盖软删行的唯一索引：
-			// 软删会让这一行继续占着 source_url，之后 SaveSourceState 的
-			// First（默认排除软删行）查不到、Create 就会撞唯一约束，
-			// 表现为「保存书源会话状态失败: UNIQUE constraint failed」，
-			// cookie / 登录态从此再也存不进去。这里必须硬删。
-			if err := tx.Unscoped().Delete(&model.ReaderSourceState{}, "source_url = ?", src.SourceURL).Error; err != nil {
+			var others int64
+			if err := tx.Model(&model.ReaderBookSource{}).
+				Where("source_url = ? AND id <> ?", src.SourceURL, id).Count(&others).Error; err != nil {
 				return err
 			}
+			if others == 0 {
+				// 会话状态是「一源一条」，而 source_url 上有覆盖软删行的唯一索引：
+				// 软删会让这一行继续占着 source_url，之后 SaveSourceState 的
+				// First（默认排除软删行）查不到、Create 就会撞唯一约束，
+				// 表现为「保存书源会话状态失败: UNIQUE constraint failed」，
+				// cookie / 登录态从此再也存不进去。这里必须硬删。
+				if err := tx.Unscoped().Delete(&model.ReaderSourceState{}, "source_url = ?", src.SourceURL).Error; err != nil {
+					return err
+				}
+			}
 		}
-		return tx.Delete(&model.ReaderBookSource{}, "id = ?", id).Error
+		return tx.Unscoped().Delete(&model.ReaderBookSource{}, "id = ?", id).Error
 	})
 }
 
@@ -108,7 +165,11 @@ func (r *ReaderRepository) SaveSourceState(ctx context.Context, st *model.Reader
 // ListBooks 用户书架（按 order 排序）。
 func (r *ReaderRepository) ListBooks(ctx context.Context, userID string) ([]model.ReaderBook, error) {
 	var out []model.ReaderBook
-	err := r.db.WithContext(ctx).Where("user_id = ?", userID).Order("`order` ASC, updated_at DESC").Find(&out).Error
+	err := r.db.WithContext(ctx).Where("user_id = ?", userID).
+		Order(readerOrderBy(
+			clause.OrderByColumn{Column: clause.Column{Name: "order"}},
+			clause.OrderByColumn{Column: clause.Column{Name: "updated_at"}, Desc: true},
+		)).Find(&out).Error
 	return out, err
 }
 
@@ -131,6 +192,15 @@ func (r *ReaderRepository) FindBookByURL(ctx context.Context, userID, origin, bo
 	return &out, nil
 }
 
+// ListBooksByOriginAndURL 按书源 + 书本地址查所有用户的书架记录。
+// 目录链路的 book.putVariable 需要写回变量，而目录抓取是跨用户共享的
+// （同一本书可能被多个用户收藏），所以这里不带 userID 过滤。
+func (r *ReaderRepository) ListBooksByOriginAndURL(ctx context.Context, origin, bookURL string) ([]model.ReaderBook, error) {
+	var out []model.ReaderBook
+	err := r.db.WithContext(ctx).Where("origin = ? AND book_url = ?", origin, bookURL).Find(&out).Error
+	return out, err
+}
+
 // CreateBook / UpdateBook / DeleteBook。
 func (r *ReaderRepository) CreateBook(ctx context.Context, b *model.ReaderBook) error {
 	return r.db.WithContext(ctx).Create(b).Error
@@ -163,10 +233,127 @@ func (r *ReaderRepository) ReplaceChapters(ctx context.Context, bookID string, c
 	})
 }
 
+// SwitchBookOrigin 换源：清空旧源章节与更新书籍信息在同一事务内完成。
+// 分开提交时若第二步失败，会留下「仍指向旧源、但目录已清空」的中间状态。
+func (r *ReaderRepository) SwitchBookOrigin(ctx context.Context, book *model.ReaderBook) error {
+	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		if err := tx.Unscoped().Delete(&model.ReaderChapter{}, "book_id = ?", book.ID).Error; err != nil {
+			return err
+		}
+		return tx.Save(book).Error
+	})
+}
+
 // ListChapters 按序取章节。
 func (r *ReaderRepository) ListChapters(ctx context.Context, bookID string) ([]model.ReaderChapter, error) {
 	var out []model.ReaderChapter
-	err := r.db.WithContext(ctx).Where("book_id = ?", bookID).Order("`index` ASC").Find(&out).Error
+	err := r.db.WithContext(ctx).Where("book_id = ?", bookID).
+		Order(readerOrderBy(
+			clause.OrderByColumn{Column: clause.Column{Name: "index"}},
+		)).Find(&out).Error
+	return out, err
+}
+
+// ─── 正文持久缓存索引 ──────────────────────────────────────────────────────
+
+// GetContentCache 按 (bookKey, chapterKey, contentType) 取缓存索引行。
+func (r *ReaderRepository) GetContentCache(ctx context.Context, bookKey, chapterKey, contentType string) (*model.ReaderContentCache, error) {
+	var out model.ReaderContentCache
+	err := r.db.WithContext(ctx).
+		Where("book_key = ? AND chapter_key = ? AND content_type = ?", bookKey, chapterKey, contentType).
+		First(&out).Error
+	if err != nil {
+		return nil, err
+	}
+	return &out, nil
+}
+
+// GetContentCacheByChapter 按 (bookKey, chapterKey) 取缓存索引行。
+// contentType 为空表示不限类型（正文链路不需要预知类型）；给出类型时精确匹配。
+func (r *ReaderRepository) GetContentCacheByChapter(ctx context.Context, bookKey, chapterKey, contentType string) (*model.ReaderContentCache, error) {
+	q := r.db.WithContext(ctx).Where("book_key = ? AND chapter_key = ?", bookKey, chapterKey)
+	if contentType != "" {
+		q = q.Where("content_type = ?", contentType)
+	}
+	var out model.ReaderContentCache
+	if err := q.Order("last_access_at DESC").First(&out).Error; err != nil {
+		return nil, err
+	}
+	return &out, nil
+}
+
+// UpsertContentCache 写入或更新缓存索引行（按 bookKey + chapterKey + contentType 去重）。
+func (r *ReaderRepository) UpsertContentCache(ctx context.Context, row *model.ReaderContentCache) error {
+	existing, err := r.GetContentCache(ctx, row.BookKey, row.ChapterKey, row.ContentType)
+	if err == nil && existing != nil {
+		existing.ChapterIdentity = row.ChapterIdentity
+		existing.ChapterIndex = row.ChapterIndex
+		existing.SourceHash = row.SourceHash
+		existing.FormatVersion = row.FormatVersion
+		existing.SizeBytes = row.SizeBytes
+		existing.AssetCount = row.AssetCount
+		existing.ExpiresAt = row.ExpiresAt
+		existing.LastAccessAt = row.LastAccessAt
+		return r.db.WithContext(ctx).Save(existing).Error
+	}
+	return r.db.WithContext(ctx).Create(row).Error
+}
+
+// TouchContentCache 记录一次命中（更新命中时间与次数）。
+func (r *ReaderRepository) TouchContentCache(ctx context.Context, id string, hits int, lastAccess int64) error {
+	return r.db.WithContext(ctx).Model(&model.ReaderContentCache{}).
+		Where("id = ?", id).
+		Updates(map[string]any{"last_access_at": lastAccess, "hits": hits}).Error
+}
+
+// ListContentCacheByBook 列出某本书的全部缓存索引（目录刷新后的 remap 用）。
+func (r *ReaderRepository) ListContentCacheByBook(ctx context.Context, bookKey string) ([]model.ReaderContentCache, error) {
+	var out []model.ReaderContentCache
+	err := r.db.WithContext(ctx).Where("book_key = ?", bookKey).Find(&out).Error
+	return out, err
+}
+
+// DeleteContentCacheByBook 删除某本书的缓存索引，返回被删除的条目（调用方据此清理磁盘文件）。
+func (r *ReaderRepository) DeleteContentCacheByBook(ctx context.Context, bookKey string) ([]model.ReaderContentCache, error) {
+	rows, err := r.ListContentCacheByBook(ctx, bookKey)
+	if err != nil || len(rows) == 0 {
+		return nil, err
+	}
+	if err := r.db.WithContext(ctx).Where("book_key = ?", bookKey).Delete(&model.ReaderContentCache{}).Error; err != nil {
+		return nil, err
+	}
+	return rows, nil
+}
+
+// DeleteContentCacheRow 删除单条缓存索引（remap 迁移旧键时用）。
+func (r *ReaderRepository) DeleteContentCacheRow(ctx context.Context, id string) error {
+	return r.db.WithContext(ctx).Delete(&model.ReaderContentCache{}, "id = ?", id).Error
+}
+
+// ListContentCacheExpired 按 TTL 取过期条目。
+func (r *ReaderRepository) ListContentCacheExpired(ctx context.Context, now int64, limit int) ([]model.ReaderContentCache, error) {
+	var out []model.ReaderContentCache
+	err := r.db.WithContext(ctx).
+		Where("expires_at > 0 AND expires_at < ?", now).
+		Order("last_access_at ASC").Limit(limit).Find(&out).Error
+	return out, err
+}
+
+// ContentCacheStats 返回条目数与总字节数（容量淘汰用）。
+func (r *ReaderRepository) ContentCacheStats(ctx context.Context) (int64, int64, error) {
+	var row struct {
+		Count int64
+		Bytes int64
+	}
+	err := r.db.WithContext(ctx).Model(&model.ReaderContentCache{}).
+		Select("COUNT(*) AS count, COALESCE(SUM(size_bytes), 0) AS bytes").Scan(&row).Error
+	return row.Count, row.Bytes, err
+}
+
+// ListContentCacheOldest 按最近命中时间取最旧的一批（LRU 淘汰用）。
+func (r *ReaderRepository) ListContentCacheOldest(ctx context.Context, limit int) ([]model.ReaderContentCache, error) {
+	var out []model.ReaderContentCache
+	err := r.db.WithContext(ctx).Order("last_access_at ASC").Limit(limit).Find(&out).Error
 	return out, err
 }
 
@@ -197,9 +384,17 @@ func (r *ReaderRepository) CountChaptersByBook(ctx context.Context, bookIDs []st
 }
 
 // GetChapter 取指定章节。
+//
+// index 在 PostgreSQL 里是保留字，必须让 GORM 按方言加引号（SQLite 反引号 /
+// PostgreSQL 双引号）。此前写成硬编码的 "book_id = ? AND `index` = ?"，
+// PostgreSQL 会把反引号词法分析成运算符并报 syntax error at or near "`"。
 func (r *ReaderRepository) GetChapter(ctx context.Context, bookID string, index int) (*model.ReaderChapter, error) {
 	var out model.ReaderChapter
-	if err := r.db.WithContext(ctx).First(&out, "book_id = ? AND `index` = ?", bookID, index).Error; err != nil {
+	err := r.db.WithContext(ctx).
+		Where(clause.Eq{Column: clause.Column{Name: "book_id"}, Value: bookID}).
+		Where(clause.Eq{Column: clause.Column{Name: "index"}, Value: index}).
+		First(&out).Error
+	if err != nil {
 		return nil, err
 	}
 	return &out, nil
@@ -265,7 +460,11 @@ func (r *ReaderRepository) SaveBookGroups(ctx context.Context, row *model.Reader
 // ListReplaceRules 用户替换规则（按 order 排序）。
 func (r *ReaderRepository) ListReplaceRules(ctx context.Context, userID string) ([]model.ReaderReplaceRule, error) {
 	var out []model.ReaderReplaceRule
-	err := r.db.WithContext(ctx).Where("user_id = ?", userID).Order("`order` DESC, created_at ASC").Find(&out).Error
+	err := r.db.WithContext(ctx).Where("user_id = ?", userID).
+		Order(readerOrderBy(
+			clause.OrderByColumn{Column: clause.Column{Name: "order"}, Desc: true},
+			clause.OrderByColumn{Column: clause.Column{Name: "created_at"}},
+		)).Find(&out).Error
 	return out, err
 }
 

internal/repository/reader_repository_dialect_test.go

@@ -0,0 +1,116 @@
+package repository
+
+import (
+	"context"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	gormlogger "gorm.io/gorm/logger"
+)
+
+// sqlCaptureLogger 只记录 GORM 生成的 SQL，不打印任何日志。
+type sqlCaptureLogger struct {
+	mu    sync.Mutex
+	lines []string
+}
+
+func (l *sqlCaptureLogger) LogMode(gormlogger.LogLevel) gormlogger.Interface { return l }
+func (l *sqlCaptureLogger) Info(context.Context, string, ...interface{})     {}
+func (l *sqlCaptureLogger) Warn(context.Context, string, ...interface{})     {}
+func (l *sqlCaptureLogger) Error(context.Context, string, ...interface{})    {}
+
+func (l *sqlCaptureLogger) Trace(_ context.Context, _ time.Time, fc func() (string, int64), _ error) {
+	sql, _ := fc()
+	l.mu.Lock()
+	l.lines = append(l.lines, sql)
+	l.mu.Unlock()
+}
+
+func (l *sqlCaptureLogger) all() string {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	return strings.Join(l.lines, "\n")
+}
+
+// newPostgresDryRunRepos 返回使用 PostgreSQL 方言的 repository 容器：
+// DryRun 只构建 SQL 不执行，DisableAutomaticPing 让它无需真实数据库也能离线运行，
+// SkipDefaultTransaction 则挡掉 GORM 默认事务包装——那一步会真的去开事务连接，
+// 在 DryRun 下同样会拨号（ToSQL 内部也是这么绕开的）。于是可以直接断言生成语句
+// 在 PostgreSQL 下是否合法。
+func newPostgresDryRunRepos(t *testing.T) (*Container, *sqlCaptureLogger) {
+	t.Helper()
+	rec := &sqlCaptureLogger{}
+	db, err := gorm.Open(postgres.New(postgres.Config{
+		DSN: "postgres://mebox:mebox@127.0.0.1:5432/mebox?sslmode=disable",
+	}), &gorm.Config{
+		DryRun:                 true,
+		DisableAutomaticPing:   true,
+		SkipDefaultTransaction: true,
+		Logger:                 rec,
+	})
+	if err != nil {
+		t.Fatalf("open dry-run postgres: %v", err)
+	}
+	return New(db), rec
+}
+
+// TestReaderListsUseDialectQuotedReservedColumns 守住阅读子系统列表查询在
+// PostgreSQL 下的合法性。reader_books.order / reader_chapters.index /
+// reader_replace_rules.order 都是关键字级列名（order 在 PostgreSQL 里是保留字）。
+//
+// 排序条件曾经写成硬编码反引号的原始字符串，例如 .Order("`order` ASC")：
+// SQLite 正常，PostgreSQL 会把反引号词法分析成运算符，直接报
+// `syntax error at or near "order"` (SQLSTATE 42601)，书架 / 目录 / 替换规则整页 500。
+// 现在改用 clause.Column，由 GORM 按方言加引号（SQLite 反引号 / PostgreSQL 双引号）。
+func TestReaderListsUseDialectQuotedReservedColumns(t *testing.T) {
+	ctx := context.Background()
+	cases := []struct {
+		name  string
+		run   func(repos *Container) error
+		wants []string
+	}{
+		{
+			name:  "books",
+			run:   func(repos *Container) error { _, err := repos.Reader.ListBooks(ctx, "user-1"); return err },
+			wants: []string{`"order"`, `"updated_at" DESC`},
+		},
+		{
+			name:  "chapters",
+			run:   func(repos *Container) error { _, err := repos.Reader.ListChapters(ctx, "book-1"); return err },
+			wants: []string{`"index"`},
+		},
+		{
+			name:  "replace rules",
+			run:   func(repos *Container) error { _, err := repos.Reader.ListReplaceRules(ctx, "user-1"); return err },
+			wants: []string{`"order" DESC`, `"created_at"`},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			repos, rec := newPostgresDryRunRepos(t)
+			if err := tc.run(repos); err != nil {
+				t.Fatalf("build query: %v", err)
+			}
+			sql := rec.all()
+			if strings.TrimSpace(sql) == "" {
+				t.Fatal("no SQL captured from the repository call")
+			}
+			if strings.Contains(sql, "`") {
+				t.Fatalf("SQL uses backtick quoting, which PostgreSQL rejects:\n%s", sql)
+			}
+			if !strings.Contains(sql, "ORDER BY") {
+				t.Fatalf("SQL has no ORDER BY clause:\n%s", sql)
+			}
+			for _, want := range tc.wants {
+				if !strings.Contains(sql, want) {
+					t.Fatalf("SQL missing %q:\n%s", want, sql)
+				}
+			}
+		})
+	}
+}

internal/repository/refresh_token_repository.go

@@ -46,16 +46,20 @@ func (r *RefreshTokenRepository) RevokeByUserID(ctx context.Context, userID stri
 	})
 }
 
-// RevokeOldestActiveByUserID keeps at most limit active refresh tokens for a
-// user by revoking the oldest non-expired, non-revoked tokens.
-func (r *RefreshTokenRepository) RevokeOldestActiveByUserID(ctx context.Context, userID string, limit int) error {
+// RevokeOldestActiveLegacyByUserID keeps at most limit active refresh tokens
+// for a user among tokens that are not bound to a device auth session
+// (legacy web clients). Device sessions are independent: trimming one
+// device's token because another device logged in would silently sign the
+// first device out even though its session is still valid.
+func (r *RefreshTokenRepository) RevokeOldestActiveLegacyByUserID(ctx context.Context, userID string, limit int) error {
 	if limit < 1 {
 		limit = 1
 	}
 	return withSQLiteBusyRetry(ctx, func() error {
 		var tokens []model.RefreshToken
 		if err := r.db.WithContext(ctx).
-			Where("user_id = ? AND revoked = ? AND expires_at > ?", userID, false, time.Now()).
+			Where("user_id = ? AND revoked = ? AND expires_at > ? AND (auth_session_id IS NULL OR auth_session_id = '')",
+				userID, false, time.Now()).
 			Order("created_at desc, id desc").
 			Find(&tokens).Error; err != nil {
 			return err
@@ -79,7 +83,7 @@ func (r *RefreshTokenRepository) DeleteExpired(ctx context.Context) error {
 	})
 }
 
-// Revoke revokes a specific refresh token.
+// Revoke 撤销某个刷新令牌。
 func (r *RefreshTokenRepository) Revoke(ctx context.Context, hash string) error {
 	return withSQLiteBusyRetry(ctx, func() error {
 		return r.db.WithContext(ctx).Model(&model.RefreshToken{}).
@@ -87,6 +91,18 @@ func (r *RefreshTokenRepository) Revoke(ctx context.Context, hash string) error
 	})
 }
 
+// RevokeByAuthSessionID 撤销某个认证会话名下的全部刷新令牌。
+// 设备被踢或主动退出后，旧刷新令牌不能再换出新令牌。
+func (r *RefreshTokenRepository) RevokeByAuthSessionID(ctx context.Context, sessionID string) error {
+	if sessionID == "" {
+		return nil
+	}
+	return withSQLiteBusyRetry(ctx, func() error {
+		return r.db.WithContext(ctx).Model(&model.RefreshToken{}).
+			Where("auth_session_id = ?", sessionID).Update("revoked", true).Error
+	})
+}
+
 // HashToken returns the SHA256 hash of a token.
 func HashToken(token string) string {
 	h := sha256.Sum256([]byte(token))

internal/repository/repository.go

@@ -23,6 +23,7 @@ type Container struct {
 	Log            *AccessLogRepository
 	Permission     *PermissionRepository
 	RefreshToken   *RefreshTokenRepository
+	AuthSession    *AuthSessionRepository
 	ApiConfig      *ApiConfigRepository
 	PlayProfile    *PlayProfileRepository
 	RegCode        *RegistrationCodeRepository
@@ -56,6 +57,7 @@ func New(db *gorm.DB) *Container {
 		Log:            &AccessLogRepository{db: db},
 		Permission:     &PermissionRepository{db: db},
 		RefreshToken:   &RefreshTokenRepository{db: db},
+		AuthSession:    &AuthSessionRepository{db: db},
 		ApiConfig:      &ApiConfigRepository{db: db},
 		PlayProfile:    &PlayProfileRepository{db: db},
 		RegCode:        &RegistrationCodeRepository{db: db},

internal/service/auth.go

@@ -34,6 +34,7 @@ type AuthService struct {
 	repo          *repository.Container
 	tokenSvc      *TokenService
 	permissionSvc *PermissionService
+	sessionSvc    *AuthSessionService
 
 	tempPassMu    sync.RWMutex
 	tempPasswords map[string]temporaryPasswordEntry
@@ -51,6 +52,11 @@ func NewAuthService(cfg *config.Config, log *zap.Logger, repo *repository.Contai
 	}
 }
 
+// SetAuthSessionService 注入设备会话服务；旧登出路径会同时撤销全部会话。
+func (s *AuthService) SetAuthSessionService(sessions *AuthSessionService) {
+	s.sessionSvc = sessions
+}
+
 // Common service-level errors.
 var (
 	ErrInvalidCredentials = errors.New("invalid username or password")
@@ -162,6 +168,23 @@ type LoginResponse struct {
 
 // Login validates credentials and returns the user + a fresh JWT token pair.
 func (s *AuthService) Login(ctx context.Context, username, password string) (*LoginResponse, error) {
+	u, err := s.Authenticate(ctx, username, password)
+	if err != nil {
+		return nil, err
+	}
+	// 签发令牌对
+	tokens, err := s.tokenSvc.IssuePairBestEffort(ctx, u.ID, u.Role, u.Tier)
+	if err != nil {
+		return nil, err
+	}
+	s.touchLoginBestEffort(u.ID)
+	return &LoginResponse{User: u, Tokens: tokens}, nil
+}
+
+// Authenticate 只校验账号与密码，不签发任何令牌。
+// 移动端 v1 登录需要先确认账号有效，再创建设备会话并签发带 sid 的令牌；
+// 分离这一步可以避免先签发一对无会话的令牌再作废。
+func (s *AuthService) Authenticate(ctx context.Context, username, password string) (*model.User, error) {
 	u, err := s.repo.User.FindByUsername(ctx, username)
 	if err != nil {
 		return nil, err
@@ -180,13 +203,7 @@ func (s *AuthService) Login(ctx context.Context, username, password string) (*Lo
 	if err := bcrypt.CompareHashAndPassword([]byte(u.PasswordHash), []byte(password)); err != nil {
 		return nil, ErrInvalidCredentials
 	}
-	// 签发令牌对
-	tokens, err := s.tokenSvc.IssuePairBestEffort(ctx, u.ID, u.Role, u.Tier)
-	if err != nil {
-		return nil, err
-	}
-	s.touchLoginBestEffort(u.ID)
-	return &LoginResponse{User: u, Tokens: tokens}, nil
+	return u, nil
 }
 
 func (s *AuthService) touchLoginBestEffort(userID string) {

internal/service/auth_session.go

@@ -0,0 +1,187 @@
+// Package service — 设备认证会话。
+package service
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"time"
+	"unicode"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// 认证会话错误。middleware 与 handler 依据这些错误区分「重新登录」和
+// 「临时基础设施故障」。
+var (
+	ErrAuthSessionRequired = errors.New("auth session required")
+	ErrAuthSessionRevoked  = errors.New("auth session revoked")
+	ErrAuthSessionExpired  = errors.New("auth session expired")
+)
+
+// AuthSessionService 管理设备会话的创建、校验和撤销。
+type AuthSessionService struct {
+	log  *zap.Logger
+	repo *repository.Container
+	now  func() time.Time
+}
+
+// NewAuthSessionService 创建会话服务。
+func NewAuthSessionService(log *zap.Logger, repo *repository.Container) *AuthSessionService {
+	return &AuthSessionService{log: log, repo: repo, now: time.Now}
+}
+
+// CreateAuthSessionInput 是创建会话所需的最小设备信息。
+type CreateAuthSessionInput struct {
+	UserID        string
+	DeviceID      string
+	DeviceName    string
+	ClientName    string
+	ClientVersion string
+}
+
+// Create 创建一次登录对应的认证会话。
+//
+// 设备 ID 由 App 安装随机生成，不接收 IMEI/MAC 等硬件标识；这里只做长度
+// 与字符白名单校验，避免任意字符串进入索引和日志。
+func (s *AuthSessionService) Create(ctx context.Context, in CreateAuthSessionInput) (*model.AuthSession, error) {
+	userID := strings.TrimSpace(in.UserID)
+	deviceID := strings.TrimSpace(in.DeviceID)
+	if userID == "" || deviceID == "" {
+		return nil, errors.New("user id and device id required")
+	}
+	if len(deviceID) > 128 || !validDeviceID(deviceID) {
+		return nil, errors.New("invalid device id")
+	}
+	now := s.currentTime()
+	session := &model.AuthSession{
+		UserID:        userID,
+		DeviceID:      deviceID,
+		DeviceName:    truncateRunes(strings.TrimSpace(in.DeviceName), 128),
+		ClientName:    truncateRunes(strings.TrimSpace(in.ClientName), 64),
+		ClientVersion: truncateRunes(strings.TrimSpace(in.ClientVersion), 64),
+		LastUsedAt:    now,
+		ExpiresAt:     now.Add(RefreshTokenDuration),
+	}
+	if err := s.repo.AuthSession.Create(ctx, session); err != nil {
+		return nil, err
+	}
+	return session, nil
+}
+
+// Validate 校验会话仍可用于给定用户。
+//
+// 未找到的会话按「已撤销」处理：App 收到 SESSION_REVOKED 后应重新登录，
+// 而不是无限刷新。数据库错误保持原样返回，由上层映射成可重试的 503。
+func (s *AuthSessionService) Validate(ctx context.Context, sessionID, userID string) (*model.AuthSession, error) {
+	sessionID = strings.TrimSpace(sessionID)
+	if sessionID == "" {
+		return nil, ErrAuthSessionRequired
+	}
+	session, err := s.repo.AuthSession.FindByID(ctx, sessionID)
+	if err != nil {
+		return nil, err
+	}
+	if session == nil || session.UserID != userID {
+		return nil, ErrAuthSessionRevoked
+	}
+	if session.Revoked {
+		return nil, ErrAuthSessionRevoked
+	}
+	if session.IsExpired() {
+		return nil, ErrAuthSessionExpired
+	}
+	return session, nil
+}
+
+// Touch 更新会话最近使用时间，失败只记日志，不影响请求。
+func (s *AuthSessionService) Touch(ctx context.Context, sessionID string) {
+	if s == nil || sessionID == "" {
+		return
+	}
+	if err := s.repo.AuthSession.TouchLastUsed(ctx, sessionID, s.currentTime()); err != nil && s.log != nil {
+		s.log.Debug("touch auth session failed", zap.String("session_id", sessionID), zap.Error(err))
+	}
+}
+
+// Revoke 撤销单个会话及其名下刷新令牌（幂等）。
+func (s *AuthSessionService) Revoke(ctx context.Context, sessionID string) error {
+	sessionID = strings.TrimSpace(sessionID)
+	if sessionID == "" {
+		return nil
+	}
+	if err := s.repo.AuthSession.Revoke(ctx, sessionID, s.currentTime()); err != nil {
+		return err
+	}
+	return s.repo.RefreshToken.RevokeByAuthSessionID(ctx, sessionID)
+}
+
+// RevokeByUser 撤销某用户的全部会话（幂等）。
+func (s *AuthSessionService) RevokeByUser(ctx context.Context, userID string) error {
+	userID = strings.TrimSpace(userID)
+	if userID == "" {
+		return nil
+	}
+	sessions, err := s.repo.AuthSession.ListActiveByUser(ctx, userID)
+	if err != nil {
+		return err
+	}
+	for i := range sessions {
+		if err := s.Revoke(ctx, sessions[i].ID); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// RevokeDevice 撤销某用户某设备的全部会话（幂等）。
+func (s *AuthSessionService) RevokeDevice(ctx context.Context, userID, deviceID string) error {
+	userID = strings.TrimSpace(userID)
+	deviceID = strings.TrimSpace(deviceID)
+	if userID == "" || deviceID == "" {
+		return nil
+	}
+	sessions, err := s.repo.AuthSession.ListByDevice(ctx, userID, deviceID)
+	if err != nil {
+		return err
+	}
+	for i := range sessions {
+		if sessions[i].Revoked {
+			continue
+		}
+		if err := s.Revoke(ctx, sessions[i].ID); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *AuthSessionService) currentTime() time.Time {
+	if s == nil || s.now == nil {
+		return time.Now()
+	}
+	return s.now()
+}
+
+func validDeviceID(id string) bool {
+	for _, r := range id {
+		if r > unicode.MaxASCII || !(unicode.IsLetter(r) || unicode.IsDigit(r) || r == '-' || r == '_' || r == '.' || r == ':') {
+			return false
+		}
+	}
+	return true
+}
+
+func truncateRunes(s string, max int) string {
+	if max <= 0 {
+		return ""
+	}
+	runes := []rune(s)
+	if len(runes) <= max {
+		return s
+	}
+	return string(runes[:max])
+}

internal/service/auth_session_test.go

@@ -0,0 +1,261 @@
+package service
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+func newAuthSessionTestEnv(t *testing.T) (*AuthSessionService, *TokenService, *repository.Container) {
+	t.Helper()
+	db := newServiceTestDB(t, &model.AuthSession{}, &model.RefreshToken{}, &model.User{}, &model.Setting{})
+	repos := repository.New(db)
+	sessions := NewAuthSessionService(zap.NewNop(), repos)
+	cfg := &config.Config{}
+	cfg.Secrets.JWTSecret = "test-secret"
+	tokens := NewTokenService(cfg, zap.NewNop(), repos)
+	tokens.SetSessionValidator(func(ctx context.Context, sessionID, userID string) error {
+		_, err := sessions.Validate(ctx, sessionID, userID)
+		return err
+	})
+	return sessions, tokens, repos
+}
+
+func seedSessionUser(t *testing.T, repos *repository.Container) *model.User {
+	t.Helper()
+	u := &model.User{Username: "mobile", PasswordHash: "x", Role: "user", Tier: "free", IsActive: true}
+	if err := repos.User.Create(t.Context(), u); err != nil {
+		t.Fatal(err)
+	}
+	return u
+}
+
+func TestAuthSessionLifecycle(t *testing.T) {
+	sessions, tokens, repos := newAuthSessionTestEnv(t)
+	ctx := context.Background()
+	user := seedSessionUser(t, repos)
+
+	session, err := sessions.Create(ctx, CreateAuthSessionInput{
+		UserID:     user.ID,
+		DeviceID:   "device-abc",
+		DeviceName: "Pixel",
+		ClientName: "MeBox Android",
+	})
+	if err != nil {
+		t.Fatalf("create session: %v", err)
+	}
+	if session.ID == "" || session.ExpiresAt.IsZero() {
+		t.Fatal("session missing id or expiry")
+	}
+	if _, err := sessions.Validate(ctx, session.ID, user.ID); err != nil {
+		t.Fatalf("validate active session: %v", err)
+	}
+	if _, err := sessions.Validate(ctx, session.ID, "other-user"); !errors.Is(err, ErrAuthSessionRevoked) {
+		t.Fatalf("cross-user validate err = %v, want ErrAuthSessionRevoked", err)
+	}
+
+	pair, err := tokens.IssuePairForSession(ctx, user.ID, user.Role, user.Tier, session.ID)
+	if err != nil {
+		t.Fatalf("issue pair: %v", err)
+	}
+	claims, err := tokens.ValidateAccessToken(pair.AccessToken)
+	if err != nil {
+		t.Fatalf("validate access token: %v", err)
+	}
+	if claims.Sid != session.ID {
+		t.Fatalf("access token sid = %q, want %q", claims.Sid, session.ID)
+	}
+	rt, err := repos.RefreshToken.FindByHash(ctx, repository.HashToken(pair.RefreshToken))
+	if err != nil || rt == nil {
+		t.Fatalf("refresh token row = %v, err = %v", rt, err)
+	}
+	if rt.AuthSessionID != session.ID {
+		t.Fatalf("refresh token session = %q, want %q", rt.AuthSessionID, session.ID)
+	}
+
+	if err := sessions.Revoke(ctx, session.ID); err != nil {
+		t.Fatalf("revoke session: %v", err)
+	}
+	if _, err := sessions.Validate(ctx, session.ID, user.ID); !errors.Is(err, ErrAuthSessionRevoked) {
+		t.Fatalf("validate revoked err = %v, want ErrAuthSessionRevoked", err)
+	}
+	rt, err = repos.RefreshToken.FindByHash(ctx, repository.HashToken(pair.RefreshToken))
+	if err != nil || rt == nil {
+		t.Fatalf("reload refresh token: %v", err)
+	}
+	if !rt.Revoked {
+		t.Fatal("refresh token should be revoked with the session")
+	}
+
+	// 幂等：重复撤销不报错。
+	if err := sessions.Revoke(ctx, session.ID); err != nil {
+		t.Fatalf("second revoke: %v", err)
+	}
+}
+
+func TestRefreshRejectsRevokedSession(t *testing.T) {
+	sessions, tokens, repos := newAuthSessionTestEnv(t)
+	ctx := context.Background()
+	user := seedSessionUser(t, repos)
+
+	session, err := sessions.Create(ctx, CreateAuthSessionInput{UserID: user.ID, DeviceID: "device-1"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	pair, err := tokens.IssuePairForSession(ctx, user.ID, user.Role, user.Tier, session.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := sessions.Revoke(ctx, session.ID); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := tokens.Refresh(ctx, pair.RefreshToken); !errors.Is(err, ErrAuthSessionRevoked) {
+		t.Fatalf("refresh revoked session err = %v, want ErrAuthSessionRevoked", err)
+	}
+}
+
+func TestRefreshKeepsSessionAssociation(t *testing.T) {
+	sessions, tokens, repos := newAuthSessionTestEnv(t)
+	ctx := context.Background()
+	user := seedSessionUser(t, repos)
+
+	session, err := sessions.Create(ctx, CreateAuthSessionInput{UserID: user.ID, DeviceID: "device-2"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	pair, err := tokens.IssuePairForSession(ctx, user.ID, user.Role, user.Tier, session.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	rotated, err := tokens.Refresh(ctx, pair.RefreshToken)
+	if err != nil {
+		t.Fatalf("refresh: %v", err)
+	}
+	claims, err := tokens.ValidateAccessToken(rotated.AccessToken)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if claims.Sid != session.ID {
+		t.Fatalf("rotated access sid = %q, want %q", claims.Sid, session.ID)
+	}
+	// 刷新路径使用 best-effort 落库；轮换结果可能稍后才写入。
+	var rt *model.RefreshToken
+	deadline := time.Now().Add(3 * time.Second)
+	for time.Now().Before(deadline) {
+		rt, err = repos.RefreshToken.FindByHash(ctx, repository.HashToken(rotated.RefreshToken))
+		if err == nil && rt != nil {
+			break
+		}
+		time.Sleep(20 * time.Millisecond)
+	}
+	if err != nil || rt == nil {
+		t.Fatalf("rotated refresh row: %v err=%v", rt, err)
+	}
+	if rt.AuthSessionID != session.ID {
+		t.Fatalf("rotated refresh session = %q, want %q", rt.AuthSessionID, session.ID)
+	}
+}
+
+// TestMobileDeviceSessionsDoNotTrimEachOther 覆盖同一账号多设备登录：
+// 每台设备有独立认证会话与刷新令牌，新设备登录或任一设备刷新都不应撤销
+// 其他设备的刷新令牌。历史实现把「最大同时登录终端」直接作用在刷新令牌
+// 上，第 N+1 台设备登录会把最早那台设备的刷新令牌标记为已撤销，那台设备
+// 下一次刷新就会收到 SESSION_REVOKED，被强制退回登录页。
+func TestMobileDeviceSessionsDoNotTrimEachOther(t *testing.T) {
+	sessions, tokens, repos := newAuthSessionTestEnv(t)
+	ctx := context.Background()
+	user := seedSessionUser(t, repos)
+
+	// 默认上限是 3，这里故意登录 4 台设备。
+	const devices = 4
+	pairs := make([]*TokenPair, 0, devices)
+	for i := 0; i < devices; i++ {
+		session, err := sessions.Create(ctx, CreateAuthSessionInput{
+			UserID:     user.ID,
+			DeviceID:   fmt.Sprintf("device-%02d", i),
+			DeviceName: fmt.Sprintf("Phone %d", i+1),
+		})
+		if err != nil {
+			t.Fatalf("create session %d: %v", i+1, err)
+		}
+		pair, err := tokens.IssuePairForSession(ctx, user.ID, user.Role, user.Tier, session.ID)
+		if err != nil {
+			t.Fatalf("issue pair %d: %v", i+1, err)
+		}
+		pairs = append(pairs, pair)
+	}
+
+	for i, pair := range pairs {
+		row, err := repos.RefreshToken.FindByHash(ctx, repository.HashToken(pair.RefreshToken))
+		if err != nil {
+			t.Fatalf("load device %d token: %v", i+1, err)
+		}
+		if row == nil {
+			t.Fatalf("device %d refresh token missing", i+1)
+		}
+		if row.Revoked {
+			t.Fatalf("device %d refresh token was revoked by another device", i+1)
+		}
+		if _, err := tokens.Refresh(ctx, pair.RefreshToken); err != nil {
+			t.Fatalf("device %d refresh failed: %v", i+1, err)
+		}
+	}
+}
+
+func TestServerIdentityPersistsAcrossInstances(t *testing.T) {
+	db := newServiceTestDB(t, &model.Setting{})
+	repos := repository.New(db)
+	ctx := context.Background()
+
+	first := NewServerIdentityService(repos, "MeBox-v1.2.3")
+	id1, err := first.ServerID(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if id1 == "" {
+		t.Fatal("empty server id")
+	}
+
+	// 独立服务实例（模拟重启）读到同一个持久身份。
+	second := NewServerIdentityService(repos, "MeBox-v1.2.3")
+	id2, err := second.ServerID(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if id2 != id1 {
+		t.Fatalf("server id changed across instances: %q != %q", id2, id1)
+	}
+
+	info, err := second.Info(ctx, ServerCapabilities{DeviceSessions: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.ServerID != id1 || info.ServerVersion != "MeBox-v1.2.3" || info.APIVersion != "v1" {
+		t.Fatalf("unexpected info: %+v", info)
+	}
+	if !info.Capabilities.DeviceSessions || info.Capabilities.PlaybackSessions {
+		t.Fatalf("unexpected capabilities: %+v", info.Capabilities)
+	}
+}
+
+func TestAuthSessionExpiry(t *testing.T) {
+	sessions, _, repos := newAuthSessionTestEnv(t)
+	user := seedSessionUser(t, repos)
+	sessions.now = func() time.Time { return time.Now().Add(-40 * 24 * time.Hour) }
+	session, err := sessions.Create(context.Background(), CreateAuthSessionInput{UserID: user.ID, DeviceID: "device-old"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	sessions.now = time.Now
+	if _, err := sessions.Validate(context.Background(), session.ID, user.ID); !errors.Is(err, ErrAuthSessionExpired) {
+		t.Fatalf("expired validate err = %v, want ErrAuthSessionExpired", err)
+	}
+}

internal/service/auth_tokens.go

@@ -108,7 +108,13 @@ func (s *AuthService) RefreshTokens(ctx context.Context, refreshToken string) (*
 	return s.tokenSvc.Refresh(ctx, refreshToken)
 }
 
-// Logout 撤销用户的所有刷新令牌。
+// Logout 撤销用户的所有刷新令牌与认证会话。
 func (s *AuthService) Logout(ctx context.Context, userID string) error {
-	return s.tokenSvc.RevokeAll(ctx, userID)
+	if err := s.tokenSvc.RevokeAll(ctx, userID); err != nil {
+		return err
+	}
+	if s.sessionSvc != nil {
+		return s.sessionSvc.RevokeByUser(ctx, userID)
+	}
+	return nil
 }

internal/service/backup.go

@@ -1,9 +1,13 @@
 // Package service — database hot backup and restore.
 //
-// BackupService uses SQLite's "VACUUM INTO" (available since 3.27.0) to
-// produce a consistent copy of the database without blocking writers.
-// Backup files are stored under {data_dir}/backups/ with a timestamp
-// suffix. The admin UI can list / download / delete / restore them.
+// Backup files are stored under {data_dir}/backups/ with a timestamp suffix.
+// The admin UI can list / download / delete / restore them.
+//
+// 两种方言的备份形态不同：
+//   - SQLite：用 "VACUUM INTO"（3.27.0 起可用）产出一个一致的库文件，
+//     扩展名 .db；恢复即「替换库文件 + 重启」。
+//   - PostgreSQL：没有单文件语义，用逻辑备份（见 backup_postgres.go），
+//     扩展名 .json.gz；恢复是在单个事务内重建全部表。
 package service
 
 import (
@@ -65,18 +69,34 @@ func (b *BackupService) backupFilePath(filename string) (string, error) {
 	return path, nil
 }
 
-// Create produces a new hot backup via "VACUUM INTO".
+// isPostgres reports whether the service is backed by PostgreSQL.
+//
+// PostgreSQL 不支持 SQLite 的 "VACUUM INTO"，按文件替换恢复也会写错目标，
+// 因此备份/恢复必须按方言分支，不能共用一条路径。
+func (b *BackupService) isPostgres() bool {
+	return b.db != nil && b.db.Dialector != nil && b.db.Dialector.Name() == "postgres"
+}
+
+// Create produces a new hot backup. SQLite uses "VACUUM INTO"; PostgreSQL uses
+// a logical dump.
 func (b *BackupService) Create(ctx context.Context) (*BackupInfo, error) {
 	dir := b.backupDir()
 	if err := os.MkdirAll(dir, 0o750); err != nil {
 		return nil, err
 	}
 	ts := time.Now().Format("20060102_150405")
-	dst := filepath.Join(dir, fmt.Sprintf("mebox_%s.db", ts))
 
-	// VACUUM INTO creates a clean, non-WAL copy atomically.
-	if err := b.db.WithContext(ctx).Exec("VACUUM INTO ?", dst).Error; err != nil {
-		return nil, fmt.Errorf("VACUUM INTO failed: %w", err)
+	var (
+		dst string
+		err error
+	)
+	if b.isPostgres() {
+		dst, err = b.createPostgresBackup(ctx, ts)
+	} else {
+		dst, err = b.createSQLiteBackup(ctx, ts)
+	}
+	if err != nil {
+		return nil, err
 	}
 	stat, err := os.Stat(dst)
 	if err != nil {
@@ -91,6 +111,15 @@ func (b *BackupService) Create(ctx context.Context) (*BackupInfo, error) {
 	}, nil
 }
 
+func (b *BackupService) createSQLiteBackup(ctx context.Context, stamp string) (string, error) {
+	dst := filepath.Join(b.backupDir(), fmt.Sprintf("mebox_%s.db", stamp))
+	// VACUUM INTO creates a clean, non-WAL copy atomically.
+	if err := b.db.WithContext(ctx).Exec("VACUUM INTO ?", dst).Error; err != nil {
+		return "", fmt.Errorf("VACUUM INTO failed: %w", err)
+	}
+	return dst, nil
+}
+
 // List returns every backup file in the backup directory, newest first.
 func (b *BackupService) List() ([]BackupInfo, error) {
 	dir := b.backupDir()
@@ -103,7 +132,7 @@ func (b *BackupService) List() ([]BackupInfo, error) {
 	}
 	out := make([]BackupInfo, 0, len(entries))
 	for _, e := range entries {
-		if e.IsDir() || !strings.HasSuffix(e.Name(), ".db") {
+		if e.IsDir() || !isBackupFilename(e.Name()) {
 			continue
 		}
 		info, err := e.Info()
@@ -132,9 +161,10 @@ func (b *BackupService) Delete(filename string) error {
 	return os.Remove(path)
 }
 
-// Restore copies a backup over the live database using VACUUM INTO in
-// reverse. WARNING: this is destructive — the live DB will be replaced.
-// Callers should shut down the server after this call.
+// Restore replaces the live database with the given backup.
+// WARNING: this is destructive. SQLite restores by swapping the database file
+// (the caller should shut down the server afterwards); PostgreSQL restores by
+// rebuilding every table inside a single transaction.
 func (b *BackupService) Restore(ctx context.Context, filename string) error {
 	src, err := b.backupFilePath(filename)
 	if err != nil {
@@ -143,6 +173,19 @@ func (b *BackupService) Restore(ctx context.Context, filename string) error {
 	if _, err := os.Stat(src); err != nil {
 		return fmt.Errorf("backup not found: %s", filename)
 	}
+	if b.isPostgres() {
+		if !strings.HasSuffix(filename, postgresBackupSuffix) {
+			return errors.New("该备份是 SQLite 文件备份，当前运行在 PostgreSQL 上，无法恢复")
+		}
+		return b.restorePostgresBackup(ctx, src)
+	}
+	if !strings.HasSuffix(filename, ".db") {
+		return errors.New("该备份是 PostgreSQL 逻辑备份，当前运行在 SQLite 上，无法恢复")
+	}
+	return b.restoreSQLiteBackup(filename, src)
+}
+
+func (b *BackupService) restoreSQLiteBackup(filename, src string) error {
 	dbPath, err := filepath.Abs(b.cfg.Database.DBPath)
 	if err != nil || dbPath == "" {
 		return errors.New("invalid database path")
@@ -171,7 +214,13 @@ func (b *BackupService) Restore(ctx context.Context, filename string) error {
 	return nil
 }
 
-// isValidBackupFilename rejects path traversal attempts and non-.db files.
+// isBackupFilename reports whether name looks like a backup produced by either
+// dialect (SQLite ".db" or PostgreSQL ".json.gz").
+func isBackupFilename(name string) bool {
+	return strings.HasSuffix(name, ".db") || strings.HasSuffix(name, postgresBackupSuffix)
+}
+
+// isValidBackupFilename rejects path traversal attempts and non-backup files.
 func isValidBackupFilename(name string) bool {
 	if name == "" {
 		return false
@@ -179,8 +228,5 @@ func isValidBackupFilename(name string) bool {
 	if strings.ContainsAny(name, "/\\") || strings.Contains(name, "..") {
 		return false
 	}
-	if !strings.HasSuffix(name, ".db") {
-		return false
-	}
-	return true
+	return isBackupFilename(name)
 }

internal/service/backup_postgres.go

@@ -0,0 +1,280 @@
+package service
+
+import (
+	"compress/gzip"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"reflect"
+	"time"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/schema"
+
+	"github.com/truewhile/MeBox/internal/database"
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// PostgreSQL 逻辑备份 / 恢复。
+//
+// SQLite 的备份是「VACUUM INTO 出一个一致的库文件，恢复时替换文件」，而
+// PostgreSQL 既没有 VACUUM INTO，数据也由服务端进程管理，没有可替换的单文件，
+// 所以这里实现逻辑备份：把每张表按主键顺序分块序列化成 JSON Lines（gzip 压缩）
+// 写入 {data_dir}/backups/。
+//
+// 分块序列化而不是整表 marshal：media 表在真实媒体库上可达几十万行、每行还带
+// overview / path 等长文本，整表进内存会把小内存的 NAS 打爆。
+//
+// 恢复在单个事务内「先清空全部模型表、再逐块插入」：任何一步失败（包括备份文件
+// 读到一半损坏）都整体回滚，不会留下半清空的库。因此恢复不需要重启服务。
+const (
+	postgresBackupSuffix   = ".json.gz"
+	postgresBackupFormat   = "mebox-postgres-logical"
+	postgresBackupVersion  = 1
+	backupDumpChunkSize    = 1000
+	backupRestoreBatchSize = 500
+)
+
+type postgresBackupHeader struct {
+	Format    string    `json:"format"`
+	Version   int       `json:"version"`
+	CreatedAt time.Time `json:"created_at"`
+}
+
+// postgresBackupRow 是「列名 → JSON 值」的一行。
+//
+// 刻意逐列反射序列化，而不是直接 json.Marshal 模型结构体：模型里有大量带
+// json:"-" 的列（Base.DeletedAt、User.AllowedLibraryIDs、APIConfig.APIKey、
+// StrmAccount.Config、PlayProfile.PINHash、ReaderBookSource.RawJSON…），走结构体
+// 自带的序列化会把这些列整列丢掉——软删除行会在恢复后「复活」，加密后的第三方
+// 密钥与 PIN 会全部丢失。
+type postgresBackupRow map[string]json.RawMessage
+
+type postgresBackupChunk struct {
+	Table string              `json:"table"`
+	Rows  []postgresBackupRow `json:"rows"`
+}
+
+// parseModelSchema 返回模型对应的表名与 GORM schema（逐列反射所需）。
+func parseModelSchema(db *gorm.DB, m any) (table string, sch *schema.Schema, err error) {
+	stmt := &gorm.Statement{DB: db}
+	if err := stmt.Parse(m); err != nil {
+		return "", nil, err
+	}
+	return stmt.Schema.Table, stmt.Schema, nil
+}
+
+// postgresBackupModelSchemas 返回「表名 → 模型 schema / 结构体类型」，用于把备份
+// 里的行还原成 GORM 能插入的具体类型。
+func postgresBackupModelSchemas(db *gorm.DB) (map[string]*schema.Schema, map[string]reflect.Type, error) {
+	schemas := make(map[string]*schema.Schema, len(model.AllModels()))
+	types := make(map[string]reflect.Type, len(model.AllModels()))
+	for _, m := range model.AllModels() {
+		table, sch, err := parseModelSchema(db, m)
+		if err != nil {
+			return nil, nil, err
+		}
+		schemas[table] = sch
+		types[table] = reflect.TypeOf(m).Elem()
+	}
+	return schemas, types, nil
+}
+
+// createPostgresBackup 把全库导出成一个 gzip 压缩的 JSON Lines 文件。
+func (b *BackupService) createPostgresBackup(ctx context.Context, stamp string) (string, error) {
+	dst := filepath.Join(b.backupDir(), "mebox_"+stamp+postgresBackupSuffix)
+	file, err := os.OpenFile(dst, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o600)
+	if err != nil {
+		return "", err
+	}
+	complete := false
+	defer func() {
+		_ = file.Close()
+		if !complete {
+			// 半截备份文件比没有备份更危险：留着会让人以为有可用的还原点。
+			_ = os.Remove(dst)
+		}
+	}()
+
+	zw := gzip.NewWriter(file)
+	enc := json.NewEncoder(zw)
+	if err := enc.Encode(postgresBackupHeader{
+		Format:    postgresBackupFormat,
+		Version:   postgresBackupVersion,
+		CreatedAt: time.Now(),
+	}); err != nil {
+		return "", fmt.Errorf("写入备份头失败: %w", err)
+	}
+	for _, m := range model.AllModels() {
+		table, sch, err := parseModelSchema(b.db, m)
+		if err != nil {
+			return "", err
+		}
+		if !b.db.Migrator().HasTable(table) {
+			continue
+		}
+		if err := b.dumpPostgresTable(ctx, m, sch, table, enc); err != nil {
+			return "", err
+		}
+	}
+	if err := zw.Close(); err != nil {
+		return "", fmt.Errorf("压缩备份失败: %w", err)
+	}
+	if err := file.Sync(); err != nil {
+		return "", fmt.Errorf("写入备份失败: %w", err)
+	}
+	complete = true
+	return dst, nil
+}
+
+// dumpPostgresTable 按主键分块导出一张表。FindInBatches 会自己按主键升序游标
+// 翻页（WHERE pk > last），不会像 OFFSET 分页那样在大表上做 O(n²) 扫描。
+func (b *BackupService) dumpPostgresTable(ctx context.Context, m any, sch *schema.Schema, table string, enc *json.Encoder) error {
+	// 软删除行也要备份：恢复后应还原成删除前的样子，而不是让它们「复活」。
+	slicePtr := reflect.New(reflect.SliceOf(reflect.TypeOf(m).Elem()))
+	err := b.db.WithContext(ctx).Unscoped().
+		FindInBatches(slicePtr.Interface(), backupDumpChunkSize, func(_ *gorm.DB, _ int) error {
+			rows, err := encodePostgresBackupRows(ctx, sch, slicePtr.Elem())
+			if err != nil {
+				return fmt.Errorf("编码表 %s 失败: %w", table, err)
+			}
+			return enc.Encode(postgresBackupChunk{Table: table, Rows: rows})
+		}).Error
+	if err != nil {
+		return fmt.Errorf("导出表 %s 失败: %w", table, err)
+	}
+	return nil
+}
+
+// backupPersistableFields 返回真正对应数据库列的字段。
+//
+// GORM 的 Schema.Fields 里还带着 gorm:"-" 的字段（例如 User.AllowedLibraryList、
+// LibraryTagList），它们的 DBName 是空字符串。不过滤的话多个「列」会共用空键：
+// 编码时互相覆盖，解码时把某个字段的值写到另一个字段上，报出
+// 「cannot unmarshal number into Go value of type []string」这类与真实数据无关的错。
+func backupPersistableFields(sch *schema.Schema) []*schema.Field {
+	out := make([]*schema.Field, 0, len(sch.Fields))
+	for _, field := range sch.Fields {
+		if field.DBName == "" {
+			continue
+		}
+		out = append(out, field)
+	}
+	return out
+}
+
+// encodePostgresBackupRows 逐列反射序列化一个批次。
+func encodePostgresBackupRows(ctx context.Context, sch *schema.Schema, slice reflect.Value) ([]postgresBackupRow, error) {
+	fields := backupPersistableFields(sch)
+	rows := make([]postgresBackupRow, 0, slice.Len())
+	for i := 0; i < slice.Len(); i++ {
+		element := slice.Index(i)
+		row := make(postgresBackupRow, len(fields))
+		for _, field := range fields {
+			value := field.ReflectValueOf(ctx, element)
+			if !value.IsValid() {
+				continue
+			}
+			raw, err := json.Marshal(value.Interface())
+			if err != nil {
+				return nil, fmt.Errorf("列 %s: %w", field.DBName, err)
+			}
+			row[field.DBName] = raw
+		}
+		rows = append(rows, row)
+	}
+	return rows, nil
+}
+
+// decodePostgresBackupRows 把「列名 → JSON 值」还原成可直接插入的具体切片。
+func decodePostgresBackupRows(ctx context.Context, sch *schema.Schema, modelType reflect.Type, rows []postgresBackupRow) (any, error) {
+	fields := backupPersistableFields(sch)
+	slice := reflect.MakeSlice(reflect.SliceOf(modelType), len(rows), len(rows))
+	for i, row := range rows {
+		element := slice.Index(i)
+		for _, field := range fields {
+			raw, ok := row[field.DBName]
+			if !ok {
+				continue
+			}
+			holder := reflect.New(field.FieldType)
+			if err := json.Unmarshal(raw, holder.Interface()); err != nil {
+				return nil, fmt.Errorf("列 %s: %w", field.DBName, err)
+			}
+			if err := field.Set(ctx, element, holder.Elem().Interface()); err != nil {
+				return nil, fmt.Errorf("列 %s: %w", field.DBName, err)
+			}
+		}
+	}
+	return slice.Interface(), nil
+}
+
+// restorePostgresBackup 用逻辑备份重建全库。
+func (b *BackupService) restorePostgresBackup(ctx context.Context, src string) error {
+	file, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	zr, err := gzip.NewReader(file)
+	if err != nil {
+		return fmt.Errorf("备份文件不是有效的 gzip: %w", err)
+	}
+	defer zr.Close()
+
+	dec := json.NewDecoder(zr)
+	var header postgresBackupHeader
+	if err := dec.Decode(&header); err != nil {
+		return fmt.Errorf("备份头损坏: %w", err)
+	}
+	if header.Format != postgresBackupFormat || header.Version != postgresBackupVersion {
+		return fmt.Errorf("不支持的备份格式 %q (v%d)", header.Format, header.Version)
+	}
+	schemas, modelTypes, err := postgresBackupModelSchemas(b.db)
+	if err != nil {
+		return err
+	}
+
+	// 恢复必须在单个事务里完成：清空成功后中途失败若不回滚，库就空了。
+	return b.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		// 逆序清空，保证 library_roots → libraries 这类外键先删子表。
+		models := model.AllModels()
+		for i := len(models) - 1; i >= 0; i-- {
+			m := models[i]
+			if !tx.Migrator().HasTable(m) {
+				continue
+			}
+			if err := tx.Session(&gorm.Session{AllowGlobalUpdate: true}).Unscoped().Delete(m).Error; err != nil {
+				return fmt.Errorf("清空表失败: %w", err)
+			}
+		}
+		for {
+			var chunk postgresBackupChunk
+			decodeErr := dec.Decode(&chunk)
+			if errors.Is(decodeErr, io.EOF) {
+				return nil
+			}
+			if decodeErr != nil {
+				return fmt.Errorf("备份文件损坏: %w", decodeErr)
+			}
+			sch, ok := schemas[chunk.Table]
+			if !ok {
+				return fmt.Errorf("备份包含未知表 %s，可能来自不兼容的版本", chunk.Table)
+			}
+			if len(chunk.Rows) == 0 {
+				continue
+			}
+			rows, err := decodePostgresBackupRows(ctx, sch, modelTypes[chunk.Table], chunk.Rows)
+			if err != nil {
+				return fmt.Errorf("表 %s 解码失败: %w", chunk.Table, err)
+			}
+			if err := database.InsertPreservingValues(tx.Unscoped(), rows, backupRestoreBatchSize); err != nil {
+				return fmt.Errorf("恢复表 %s 失败: %w", chunk.Table, err)
+			}
+		}
+	})
+}

internal/service/backup_postgres_test.go

@@ -0,0 +1,226 @@
+package service
+
+import (
+	"compress/gzip"
+	"context"
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+func newBackupTestService(t *testing.T) (*BackupService, *config.Config) {
+	t.Helper()
+	cfg := &config.Config{}
+	cfg.App.DataDir = t.TempDir()
+	db := newServiceTestDB(t)
+	svc := &BackupService{cfg: cfg, log: zap.NewNop(), db: db}
+	// Create 会先建目录；直接调各方言的 create* 助手时需要它已存在。
+	if err := os.MkdirAll(svc.backupDir(), 0o750); err != nil {
+		t.Fatal(err)
+	}
+	return svc, cfg
+}
+
+// TestPostgresLogicalBackupRoundTrip 验证「备份 → 改库 → 恢复」后整库回到备份时的
+// 样子，包括软删除行与 json:"-" 的列。
+//
+// 逻辑备份/恢复本身是方言无关的 GORM 代码（PostgreSQL 专有的只有文件后缀与
+// isPostgres() 分派），所以可以直接在 SQLite 上跑。
+func TestPostgresLogicalBackupRoundTrip(t *testing.T) {
+	svc, _ := newBackupTestService(t)
+	ctx := context.Background()
+	db := svc.db
+
+	lib := model.Library{Base: model.Base{ID: "lib-1"}, Name: "Movies", Path: "/media/movies", Type: "movie", Enabled: true}
+	if err := db.Create(&lib).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&model.LibraryRoot{Base: model.Base{ID: "root-1"}, LibraryID: lib.ID, Path: "/media/movies"}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&model.Media{Base: model.Base{ID: "m-keep"}, LibraryID: lib.ID, Title: "Keep", Path: "/media/movies/keep.mkv"}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&model.Media{Base: model.Base{ID: "m-gone"}, LibraryID: lib.ID, Title: "Gone", Path: "/media/movies/gone.mkv"}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Delete(&model.Media{}, "id = ?", "m-gone").Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&model.Setting{Key: "k", Value: "v"}).Error; err != nil {
+		t.Fatal(err)
+	}
+	// 下面这些列都带 json:"-"：走结构体自带的 JSON 序列化会被整列丢掉，
+	// 恢复之后用户权限、置顶库、加密后的密钥会一起消失。
+	user := model.User{
+		Base:                 model.Base{ID: "u-1"},
+		Username:             "alice",
+		PasswordHash:         "hash",
+		Role:                 "user",
+		AllowedLibraryIDs:    `["lib-1"]`,
+		PinnedLibraryIDs:     `["lib-1"]`,
+		HideAdult:            true,
+		IsActive:             true,
+		DanmakuEnabled:       true,
+		PlayerVr360GuideSeen: true,
+	}
+	if err := db.Create(&user).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&model.APIConfig{Base: model.Base{ID: "cfg-1"}, Provider: "tmdb", APIKey: "ciphertext", Enabled: true}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	dump, err := svc.createPostgresBackup(ctx, "20260101_000000")
+	if err != nil {
+		t.Fatalf("createPostgresBackup: %v", err)
+	}
+	if dump == "" {
+		t.Fatal("createPostgresBackup returned an empty path")
+	}
+
+	// 破坏当前数据：加一条备份里没有的、硬删一条备份里有的。
+	if err := db.Create(&model.Media{Base: model.Base{ID: "m-extra"}, LibraryID: lib.ID, Title: "Extra", Path: "/media/movies/extra.mkv"}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Unscoped().Delete(&model.Media{}, "id = ?", "m-keep").Error; err != nil {
+		t.Fatal(err)
+	}
+
+	if err := svc.restorePostgresBackup(ctx, dump); err != nil {
+		t.Fatalf("restorePostgresBackup: %v", err)
+	}
+
+	var ids []string
+	if err := db.Unscoped().Model(&model.Media{}).Order("id asc").Pluck("id", &ids).Error; err != nil {
+		t.Fatal(err)
+	}
+	if want := []string{"m-gone", "m-keep"}; !reflect.DeepEqual(ids, want) {
+		t.Fatalf("media ids after restore = %v, want %v", ids, want)
+	}
+
+	// 软删除状态必须原样还原，而不是被「复活」。
+	var gone model.Media
+	if err := db.Unscoped().First(&gone, "id = ?", "m-gone").Error; err != nil {
+		t.Fatal(err)
+	}
+	if !gone.DeletedAt.Valid {
+		t.Fatal("soft-deleted media was revived by restore")
+	}
+	var live int64
+	if err := db.Model(&model.Media{}).Where("id = ?", "m-keep").Count(&live).Error; err != nil {
+		t.Fatal(err)
+	}
+	if live != 1 {
+		t.Fatalf("live media count = %d, want 1", live)
+	}
+
+	var value string
+	if err := db.Model(&model.Setting{}).Where("key = ?", "k").Select("value").Scan(&value).Error; err != nil {
+		t.Fatal(err)
+	}
+	if value != "v" {
+		t.Fatalf("setting value = %q, want v", value)
+	}
+	var libCount int64
+	if err := db.Model(&model.Library{}).Count(&libCount).Error; err != nil {
+		t.Fatal(err)
+	}
+	if libCount != 1 {
+		t.Fatalf("library count = %d, want 1", libCount)
+	}
+	var rootCount int64
+	if err := db.Model(&model.LibraryRoot{}).Count(&rootCount).Error; err != nil {
+		t.Fatal(err)
+	}
+	if rootCount != 1 {
+		t.Fatalf("library root count = %d, want 1", rootCount)
+	}
+
+	// json:"-" 的列必须同样被备份：它们是权限与凭据，丢了比丢一条媒体严重得多。
+	var restoredUser model.User
+	if err := db.First(&restoredUser, "id = ?", "u-1").Error; err != nil {
+		t.Fatal(err)
+	}
+	if restoredUser.PasswordHash != "hash" {
+		t.Fatalf("password hash = %q, want hash", restoredUser.PasswordHash)
+	}
+	if restoredUser.AllowedLibraryIDs != `["lib-1"]` {
+		t.Fatalf(`allowed library ids = %q, want ["lib-1"]`, restoredUser.AllowedLibraryIDs)
+	}
+	if restoredUser.PinnedLibraryIDs != `["lib-1"]` {
+		t.Fatalf(`pinned library ids = %q, want ["lib-1"]`, restoredUser.PinnedLibraryIDs)
+	}
+	if !restoredUser.HideAdult || !restoredUser.IsActive || !restoredUser.DanmakuEnabled || !restoredUser.PlayerVr360GuideSeen {
+		t.Fatalf("boolean columns lost: %+v", restoredUser)
+	}
+
+	var restoredConfig model.APIConfig
+	if err := db.First(&restoredConfig, "id = ?", "cfg-1").Error; err != nil {
+		t.Fatal(err)
+	}
+	if restoredConfig.APIKey != "ciphertext" {
+		t.Fatalf("api key = %q, want ciphertext", restoredConfig.APIKey)
+	}
+}
+
+// TestRestorePostgresBackupKeepsDataOnCorruptFile 验证损坏的备份不会在回滚后留下
+// 半清空的库：恢复是先清空再插入，必须整体在一个事务里，否则中途失败就把库清掉了。
+func TestRestorePostgresBackupKeepsDataOnCorruptFile(t *testing.T) {
+	svc, _ := newBackupTestService(t)
+	ctx := context.Background()
+	if err := svc.db.Create(&model.Setting{Key: "keep", Value: "me"}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	corrupt := filepath.Join(t.TempDir(), "broken.json.gz")
+	file, err := os.Create(corrupt)
+	if err != nil {
+		t.Fatal(err)
+	}
+	zw := gzip.NewWriter(file)
+	// 头部完整、正文半截：解码在清空表之后才会失败。
+	if _, err := zw.Write([]byte(
+		`{"format":"mebox-postgres-logical","version":1,"created_at":"2026-01-01T00:00:00Z"}` + "\n" +
+			`{"table":"media","rows":[`)); err != nil {
+		t.Fatal(err)
+	}
+	if err := zw.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := file.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := svc.restorePostgresBackup(ctx, corrupt); err == nil {
+		t.Fatal("corrupt backup should fail to restore")
+	}
+
+	var value string
+	if err := svc.db.Model(&model.Setting{}).Where("key = ?", "keep").Select("value").Scan(&value).Error; err != nil {
+		t.Fatal(err)
+	}
+	if value != "me" {
+		t.Fatalf("a failed restore wiped the database: settings keep = %q", value)
+	}
+}
+
+// TestRestoreRejectsBackupFromOtherDialect 验证备份文件与当前方言不匹配时给出明确
+// 错误，而不是把 SQLite 文件写到 PostgreSQL 部署的库路径上（那是原实现的隐患）。
+func TestRestoreRejectsBackupFromOtherDialect(t *testing.T) {
+	svc, _ := newBackupTestService(t)
+	pgStyle := filepath.Join(svc.backupDir(), "mebox_20260101_000000.json.gz")
+	if err := os.WriteFile(pgStyle, []byte("not-gzip"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	// SQLite 路径下不允许恢复 PostgreSQL 逻辑备份。
+	if err := svc.Restore(context.Background(), filepath.Base(pgStyle)); err == nil {
+		t.Fatal("SQLite restore accepted a PostgreSQL logical backup")
+	}
+}

internal/service/backup_zero_values_test.go

@@ -0,0 +1,34 @@
+package service
+
+import (
+	"testing"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+func TestPostgresLogicalBackupPreservesZeroValues(t *testing.T) {
+	svc, _ := newBackupTestService(t)
+	user := model.User{Username: "disabled", PasswordHash: "hash"}
+	if err := svc.db.Create(&user).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := svc.db.Model(&user).Updates(map[string]any{
+		"is_active": false, "hide_adult": false, "player_volume": 0, "danmaku_enabled": false,
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+	dump, err := svc.createPostgresBackup(t.Context(), "zero-values")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := svc.restorePostgresBackup(t.Context(), dump); err != nil {
+		t.Fatal(err)
+	}
+	var got model.User
+	if err := svc.db.First(&got, "id = ?", user.ID).Error; err != nil {
+		t.Fatal(err)
+	}
+	if got.IsActive || got.HideAdult || got.PlayerVolume != 0 || got.DanmakuEnabled {
+		t.Fatalf("restore replaced zero values: active=%v hide_adult=%v volume=%v danmaku=%v", got.IsActive, got.HideAdult, got.PlayerVolume, got.DanmakuEnabled)
+	}
+}

internal/service/cloud115/url_cache.go

@@ -1,26 +1,34 @@
 // 下载直链进程级缓存。
 //
-// 115 的 /open/ufile/downurl 换取结果在一段时间内有效，且换取请求是
-// WAF 风控重点关注的密集接口。缓存按 pickcode 存直链、避免对同一文件
-// 反复换取；下载失败（http 403/404 等）时由调用方主动清除对应条目，
-// 下一轮重试会重新换取链接。
+// 115 的 /open/ufile/downurl 换取结果带 `t=` 过期时间戳（实测为「换取时刻 +
+// 1800 秒」，即 30 分钟），且换取请求是 WAF 风控重点关注的密集接口。缓存按
+// pickcode 存直链、避免对同一文件反复换取；下载失败（http 403/404 等）时由
+// 调用方主动清除对应条目，下一轮重试会重新换取链接。
 package cloud115
 
 import (
+	"net/url"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
 )
 
-// downloadURLCacheTTL 直链缓存时长。115 直链一般有效 1 小时左右，
-// 取 45 分钟留出余量。QMediaSync 同类缓存使用 50 分钟。
-const downloadURLCacheTTL = 45 * time.Minute
+// downloadURLCacheMaxTTL 直链缓存上限：仅在解析不出直链自带过期时间（`t=`）
+// 时使用。115 直链实际有效 30 分钟，这里取 45 分钟只是兜底上限，正常情况下
+// 由 linkExpirySafety 提前失效，避免把已经过期的直链发给客户端。
+const downloadURLCacheMaxTTL = 45 * time.Minute
+
+// linkExpirySafety 提前量：直链自身的过期时间戳到达前就停止使用，留出客户端
+// 建连与传输的余量，防止出现「服务端认为还有效、CDN 已经 403」的窗口。
+const linkExpirySafety = 2 * time.Minute
 
 // maxCachedURLs 超过该数量时顺带清理过期条目，防止 map 无限膨胀。
 const maxCachedURLs = 10000
 
 type urlCacheEntry struct {
 	url       string
+	createdAt time.Time
 	expiresAt time.Time
 }
 
@@ -37,6 +45,43 @@ func urlCacheKey(pickCode, ua string) string {
 	return pickCode + "@" + ua
 }
 
+// LinkExpiry 解析 115 直链自带的过期时间戳（`t=` 参数，单位秒）。
+// 解析不出时返回零值，调用方按兜底 TTL 处理。
+func LinkExpiry(rawURL string) time.Time {
+	u, err := url.Parse(strings.TrimSpace(rawURL))
+	if err != nil || u == nil {
+		return time.Time{}
+	}
+	raw := strings.TrimSpace(u.Query().Get("t"))
+	if raw == "" {
+		return time.Time{}
+	}
+	sec, err := strconv.ParseInt(raw, 10, 64)
+	if err != nil || sec <= 0 {
+		return time.Time{}
+	}
+	return time.Unix(sec, 0)
+}
+
+// cacheExpiry 计算写入缓存时应使用的过期时刻：跟随直链自身的 `t=` 并提前
+// linkExpirySafety，解析不出时退回 downloadURLCacheMaxTTL。返回零值表示这条
+// 直链已经过期，不应写入缓存。
+func cacheExpiry(rawURL string, now time.Time) time.Time {
+	maxExpiry := now.Add(downloadURLCacheMaxTTL)
+	linkExpiry := LinkExpiry(rawURL)
+	if linkExpiry.IsZero() {
+		return maxExpiry
+	}
+	expiry := linkExpiry.Add(-linkExpirySafety)
+	if !expiry.After(now) {
+		return time.Time{}
+	}
+	if expiry.After(maxExpiry) {
+		return maxExpiry
+	}
+	return expiry
+}
+
 // GetDownloadURLCache 返回未过期的缓存直链；不存在或已过期返回空串。
 func GetDownloadURLCache(pickCode string, uas ...string) string {
 	if pickCode == "" {
@@ -59,11 +104,17 @@ func GetDownloadURLCache(pickCode string, uas ...string) string {
 	return entry.url
 }
 
-// SetDownloadURLCache 写入直链缓存。
+// SetDownloadURLCache 写入直链缓存。过期时刻跟随直链自身的 `t=`，已经过期的
+// 直链直接丢弃，避免把死链缓存下来。
 func SetDownloadURLCache(pickCode string, url string, uas ...string) {
 	if pickCode == "" || url == "" {
 		return
 	}
+	now := time.Now()
+	expiresAt := cacheExpiry(url, now)
+	if expiresAt.IsZero() {
+		return
+	}
 	ua := ""
 	if len(uas) > 0 {
 		ua = uas[0]
@@ -71,7 +122,6 @@ func SetDownloadURLCache(pickCode string, url string, uas ...string) {
 	urlCacheMu.Lock()
 	defer urlCacheMu.Unlock()
 	if len(urlCache) >= maxCachedURLs {
-		now := time.Now()
 		for k, e := range urlCache {
 			if now.After(e.expiresAt) {
 				delete(urlCache, k)
@@ -79,7 +129,7 @@ func SetDownloadURLCache(pickCode string, url string, uas ...string) {
 		}
 	}
 	key := urlCacheKey(pickCode, ua)
-	urlCache[key] = urlCacheEntry{url: url, expiresAt: time.Now().Add(downloadURLCacheTTL)}
+	urlCache[key] = urlCacheEntry{url: url, createdAt: now, expiresAt: expiresAt}
 }
 
 // ClearDownloadURLCache 删除指定 pickcode 的所有缓存（下载得到非 2xx 时调用）。
@@ -95,3 +145,32 @@ func ClearDownloadURLCache(pickCode string) {
 		}
 	}
 }
+
+// ClearDownloadURLCacheIfOlderThan 删除指定 pickcode 下「已经存在超过 minAge」
+// 的缓存条目，返回是否删除了至少一条。
+//
+// 客户端上报「直链被 CDN 拒绝」时用它强制换链：既让下一次解析拿到新地址，
+// 又不会让同一秒内的重试风暴把 115 换链接口打出突发。
+func ClearDownloadURLCacheIfOlderThan(pickCode string, minAge time.Duration) bool {
+	if pickCode == "" {
+		return false
+	}
+	if minAge < 0 {
+		minAge = 0
+	}
+	now := time.Now()
+	removed := false
+	urlCacheMu.Lock()
+	defer urlCacheMu.Unlock()
+	for k, e := range urlCache {
+		if k != pickCode && !strings.HasPrefix(k, pickCode+"@") {
+			continue
+		}
+		if now.Sub(e.createdAt) < minAge {
+			continue
+		}
+		delete(urlCache, k)
+		removed = true
+	}
+	return removed
+}

internal/service/cloud115/url_cache_test.go

@@ -1,6 +1,7 @@
 package cloud115
 
 import (
+	"fmt"
 	"testing"
 	"time"
 )
@@ -29,3 +30,72 @@ func TestDownloadURLCache(t *testing.T) {
 		t.Fatalf("cleared entry should be a miss, got %q", got)
 	}
 }
+
+// 115 直链自带 `t=` 过期时间戳（实测为换取时刻 + 1800 秒）。缓存必须跟随它，
+// 否则会出现「服务端认为还有效、CDN 已经 403」的窗口：直链被缓存到 45 分钟，
+// 但第 30 分钟起客户端就必然拿到 403。
+func TestDownloadURLCacheExpiryFollowsLinkTimestamp(t *testing.T) {
+	now := time.Now()
+	link := fmt.Sprintf("https://cdn/1/a.mkv?t=%d&u=1&k=abc", now.Add(30*time.Minute).Unix())
+
+	got := cacheExpiry(link, now)
+	want := now.Add(30*time.Minute - linkExpirySafety)
+	if diff := got.Sub(want); diff > time.Second || diff < -time.Second {
+		t.Fatalf("cacheExpiry = %v, want %v", got, want)
+	}
+
+	// 解析不出 t= 时退回兜底 TTL，保持旧行为。
+	fallback := cacheExpiry("https://cdn/1/a.mkv", now)
+	if diff := fallback.Sub(now.Add(downloadURLCacheMaxTTL)); diff > time.Second || diff < -time.Second {
+		t.Fatalf("fallback cacheExpiry = %v, want %v", fallback, now.Add(downloadURLCacheMaxTTL))
+	}
+
+	// 直链本身已经过期（或只剩不足提前量的寿命）时不进缓存。
+	if got := cacheExpiry(fmt.Sprintf("https://cdn/1/a.mkv?t=%d", now.Add(-time.Minute).Unix()), now); !got.IsZero() {
+		t.Fatalf("expired link must not be cached, got expiry %v", got)
+	}
+	if got := cacheExpiry(fmt.Sprintf("https://cdn/1/a.mkv?t=%d", now.Add(time.Minute).Unix()), now); !got.IsZero() {
+		t.Fatalf("link expiring inside the safety margin must not be cached, got %v", got)
+	}
+}
+
+// 客户端上报「直链被 CDN 拒绝」时按 pickcode 清缓存，但要挡住刚写入的条目，
+// 避免重试风暴把 115 换链接口打出突发。
+func TestClearDownloadURLCacheIfOlderThan(t *testing.T) {
+	urlCacheMu.Lock()
+	urlCache = map[string]urlCacheEntry{}
+	urlCacheMu.Unlock()
+	t.Cleanup(func() {
+		urlCacheMu.Lock()
+		urlCache = map[string]urlCacheEntry{}
+		urlCacheMu.Unlock()
+	})
+
+	future := time.Now().Add(30 * time.Minute)
+	link := fmt.Sprintf("https://cdn/1/a.mkv?t=%d", future.Unix())
+	SetDownloadURLCache("pick-fresh", link, "ua-a")
+	if ClearDownloadURLCacheIfOlderThan("pick-fresh", time.Minute) {
+		t.Fatal("fresh entry must survive the min-age guard")
+	}
+	if got := GetDownloadURLCache("pick-fresh", "ua-a"); got != link {
+		t.Fatalf("fresh entry lost, got %q", got)
+	}
+
+	SetDownloadURLCache("pick-old", link, "ua-a")
+	urlCacheMu.Lock()
+	entry := urlCache[urlCacheKey("pick-old", "ua-a")]
+	entry.createdAt = time.Now().Add(-10 * time.Minute)
+	urlCache[urlCacheKey("pick-old", "ua-a")] = entry
+	urlCacheMu.Unlock()
+
+	if !ClearDownloadURLCacheIfOlderThan("pick-old", time.Minute) {
+		t.Fatal("stale entry should be cleared")
+	}
+	if got := GetDownloadURLCache("pick-old", "ua-a"); got != "" {
+		t.Fatalf("stale entry should be gone, got %q", got)
+	}
+	// 无关 pickcode 不受影响。
+	if got := GetDownloadURLCache("pick-fresh", "ua-a"); got != link {
+		t.Fatalf("unrelated pickcode lost, got %q", got)
+	}
+}

internal/service/danmaku_remote_resolver_test.go

@@ -0,0 +1,157 @@
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// newDanmakuRemoteResolverTest 起一个假的远程 Emby（账号 + 挂载齐备），返回接好
+// 弹幕解析器的 builder。
+func newDanmakuRemoteResolverTest(t *testing.T, handler http.Handler) *serviceContainerBuilder {
+	t.Helper()
+	server := httptest.NewServer(handler)
+	t.Cleanup(server.Close)
+
+	db := newServiceTestDB(t, &model.StrmAccount{}, &model.EmbyMount{})
+	repos := repository.New(db)
+	cfg := &config.Config{}
+	remote := NewEmbyRemoteService(cfg, zap.NewNop(), repos, NewCryptoService("", zap.NewNop()))
+	remote.SetRuntimeCache(NewRuntimeCacheService(cfg, zap.NewNop()))
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            server.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	if err := repos.StrmAccount.Create(t.Context(), &model.StrmAccount{
+		Base:     model.Base{ID: "acct-1"},
+		Name:     "远程 Emby",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}); err != nil {
+		t.Fatalf("create account: %v", err)
+	}
+	if err := repos.EmbyMount.Create(t.Context(), &model.EmbyMount{
+		Base:           model.Base{ID: "mount-1"},
+		AccountID:      "acct-1",
+		RemoteViewID:   "view-1",
+		RemoteViewName: "新番连载",
+		CollectionType: "tvshows",
+		Enabled:        true,
+	}); err != nil {
+		t.Fatalf("create mount: %v", err)
+	}
+	return &serviceContainerBuilder{
+		cfg:   cfg,
+		log:   zap.NewNop(),
+		repos: repos,
+		c:     &Container{Cfg: cfg, Log: zap.NewNop(), Repo: repos, EmbyRemote: remote},
+	}
+}
+
+func danmakuResolverTestEpisode(id string) map[string]any {
+	return map[string]any{
+		"Id":   id,
+		"Name": "第 1 集",
+		"Type": "Episode",
+		"Path": "/media/anime/PSYREN/" + id + ".mkv",
+		"MediaSources": []any{
+			map[string]any{"Id": id + "-src", "Container": "mkv", "Size": int64(1 << 20)},
+		},
+	}
+}
+
+// 目录类条目（整部剧/季）自身没有媒体源，拿它的 ID 去请求远程 /Videos/{id}/stream 只会
+// 回 500，哈希层于是每次都白白跳过。这条用例保证弹幕解析器跟随 /api/stream 的规则先
+// 落到第一集：哈希算的是真正要播的那条流。
+func TestResolveDanmakuRemoteMediaUsesPlayableChildForContainer(t *testing.T) {
+	var requested []string
+	b := newDanmakuRemoteResolverTest(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requested = append(requested, r.URL.Path)
+		w.Header().Set("Content-Type", "application/json")
+		switch r.URL.Path {
+		case "/emby/Users/uid-1/Items/series-100":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Id": "series-100", "Name": "PSYREN", "Type": "Series", "IsFolder": true,
+			})
+		case "/emby/Users/uid-1/Items":
+			if got := r.URL.Query().Get("ParentId"); got != "series-100" {
+				t.Errorf("ParentId = %q, want series-100", got)
+			}
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Items": []map[string]any{
+					{"Id": "season-1", "Type": "Season", "IndexNumber": 1},
+					danmakuResolverTestEpisode("ep-1"),
+				},
+			})
+		case "/emby/Users/uid-1/Items/ep-1":
+			_ = json.NewEncoder(w).Encode(danmakuResolverTestEpisode("ep-1"))
+		default:
+			w.WriteHeader(http.StatusNotFound)
+		}
+	}))
+
+	media, streamURL, err := b.resolveDanmakuRemoteMedia(
+		context.Background(), EncodeEmbyRemoteID("mount-1", "series-100"))
+	if err != nil {
+		t.Fatalf("resolve failed: %v", err)
+	}
+	if media == nil {
+		t.Fatal("resolve returned no media metadata")
+	}
+	if !strings.Contains(streamURL, "/Videos/ep-1/stream") {
+		t.Fatalf("stream url = %q, want the playable child ep-1", streamURL)
+	}
+	if strings.Contains(streamURL, "series-100") {
+		t.Fatalf("stream url = %q, must not point at the container id (remote Emby answers 500)", streamURL)
+	}
+	if !strings.Contains(strings.Join(requested, " "), "/Items/ep-1") {
+		t.Fatalf("metadata must come from the playable child, requests = %v", requested)
+	}
+}
+
+// 本身可播的条目（单集/电影）不能被改写：直接取它自己的流地址。
+func TestResolveDanmakuRemoteMediaKeepsPlayableItem(t *testing.T) {
+	b := newDanmakuRemoteResolverTest(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		if r.URL.Path != "/emby/Users/uid-1/Items/ep-2" {
+			t.Errorf("unexpected upstream path %q", r.URL.Path)
+		}
+		_ = json.NewEncoder(w).Encode(danmakuResolverTestEpisode("ep-2"))
+	}))
+
+	media, streamURL, err := b.resolveDanmakuRemoteMedia(
+		context.Background(), EncodeEmbyRemoteID("mount-1", "ep-2"))
+	if err != nil {
+		t.Fatalf("resolve failed: %v", err)
+	}
+	if media == nil {
+		t.Fatal("resolve returned no media metadata")
+	}
+	if !strings.Contains(streamURL, "/Videos/ep-2/stream") {
+		t.Fatalf("stream url = %q, want /Videos/ep-2/stream", streamURL)
+	}
+}
+
+// 不是远程伪装 ID 时直接报错，不去猜一个可以拉取的地址。
+func TestResolveDanmakuRemoteMediaRejectsPlainID(t *testing.T) {
+	b := newDanmakuRemoteResolverTest(t, http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		t.Error("plain local ids must not reach the remote Emby")
+		w.WriteHeader(http.StatusNotFound)
+	}))
+
+	if _, _, err := b.resolveDanmakuRemoteMedia(context.Background(), "local-media-1"); err == nil {
+		t.Fatal("expected an error for a non remote-emby id")
+	}
+}

internal/service/device_listing.go

@@ -7,6 +7,8 @@ import (
 	"strings"
 	"time"
 
+	"go.uber.org/zap"
+
 	"github.com/truewhile/MeBox/internal/model"
 )
 
@@ -28,6 +30,14 @@ func (s *DeviceService) KickDevice(ctx context.Context, userID, deviceID string)
 	if err != nil {
 		return err
 	}
+	// 立即撤销该设备的认证会话：只标记 UserDevice 不足以让已签发的 JWT
+	// 失效，新协议令牌必须同时被会话校验拒绝。
+	if s.authSessions != nil {
+		if err := s.authSessions.RevokeDevice(ctx, userID, d.DeviceID); err != nil && s.log != nil {
+			s.log.Warn("revoke auth sessions for kicked device failed",
+				zap.String("user_id", userID), zap.String("device_id", d.DeviceID), zap.Error(err))
+		}
+	}
 	s.notify(ctx, userID, fmt.Sprintf("🔌 设备已下线：<b>%s</b>\n该终端需要重新登录后才能继续使用。", deviceLabel(d.DeviceName, d.Client)))
 	return nil
 }
@@ -37,6 +47,12 @@ func (s *DeviceService) KickAllDevices(ctx context.Context, userID string) error
 	if err := s.repo.UserDevice.SetKickedByUser(ctx, userID, true); err != nil {
 		return err
 	}
+	if s.authSessions != nil {
+		if err := s.authSessions.RevokeByUser(ctx, userID); err != nil && s.log != nil {
+			s.log.Warn("revoke auth sessions for kicked user failed",
+				zap.String("user_id", userID), zap.Error(err))
+		}
+	}
 	s.notify(ctx, userID, "🔌 你名下的全部设备已下线，需要重新登录后才能继续使用。")
 	return nil
 }

internal/service/device_service.go

@@ -31,6 +31,8 @@ type DeviceService struct {
 	log      *zap.Logger
 	repo     *repository.Container
 	sessions *SessionTrackerService
+	// authSessions 用于踢出设备时立即撤销其认证会话；nil 表示旧装配路径。
+	authSessions *AuthSessionService
 
 	// notifyUser sends a Telegram message to the local user (resolved to their
 	// Telegram binding). Wired by the bot service; nil disables notifications.
@@ -60,6 +62,11 @@ func (s *DeviceService) SetSessionTracker(tracker *SessionTrackerService) {
 	s.sessions = tracker
 }
 
+// SetAuthSessionService 注入认证会话服务，使踢出设备同时撤销其新协议令牌。
+func (s *DeviceService) SetAuthSessionService(sessions *AuthSessionService) {
+	s.authSessions = sessions
+}
+
 // fingerprint derives a stable terminal hash from the device name. Client/app
 // names are deliberately ignored so one phone/TV/PC using multiple apps is
 // still counted as one terminal device; Client remains a login channel label.

internal/service/emby_episodic_path_test.go

@@ -0,0 +1,82 @@
+package service
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// TestLikelyEpisodicPathSQLNormalisesSeparator 守住剧集路径判定的转义差异。
+//
+// 此前 embyLikelyEpisodicPathSQL 会额外生成一份反斜杠模式
+// （strings.ReplaceAll(pattern, "/", `\`)）。PostgreSQL 的 LIKE 默认就把反斜杠
+// 当转义符，模式结尾的 `\%` 被解析成「字面百分号」而不是「反斜杠 + 通配符」，
+// 那些模式在 PostgreSQL 下永不命中；SQLite 没有默认转义符所以一直正常。
+// 现在统一在 SQL 里把分隔符归一化成 '/'，模式本身不再含反斜杠。
+func TestLikelyEpisodicPathSQLNormalisesSeparator(t *testing.T) {
+	clause, args := embyLikelyEpisodicPathSQL()
+	if !strings.Contains(clause, "REPLACE(media.path") {
+		t.Fatalf("clause no longer normalises the path separator:\n%s", clause)
+	}
+	if got := strings.Count(clause, "LIKE ?"); got != len(args) {
+		t.Fatalf("clause has %d placeholders but %d args:\n%s", got, len(args), clause)
+	}
+	for _, arg := range args {
+		pattern, ok := arg.(string)
+		if !ok {
+			t.Fatalf("unexpected pattern type %T", arg)
+		}
+		if strings.Contains(pattern, `\`) {
+			t.Fatalf("pattern %q still contains a backslash; PostgreSQL's LIKE would treat it as an escape character", pattern)
+		}
+		if !strings.Contains(pattern, "/") {
+			t.Fatalf("pattern %q lost its separator", pattern)
+		}
+	}
+}
+
+// TestFilterLikelyEpisodicPathsHandlesWindowsStylePaths 验证反斜杠路径（Windows
+// 宿主机入库的媒体）仍然被判成剧集并从电影库查询里排除。
+func TestFilterLikelyEpisodicPathsHandlesWindowsStylePaths(t *testing.T) {
+	db := newServiceTestDB(t)
+	episodic := model.Media{
+		Base:       model.Base{ID: "ep-1"},
+		Path:       `D:\Media\国产剧\我的剧\Season 1\我的剧 - S01E01.mkv`,
+		SeasonNum:  1,
+		EpisodeNum: 1,
+	}
+	movie := model.Media{
+		Base: model.Base{ID: "mv-1"},
+		Path: `D:\Media\电影\某电影\某电影.mkv`,
+	}
+	if err := db.Create(&episodic).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&movie).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	q := filterLikelyEpisodicPathsFromMovieQuery(
+		db.Model(&model.Media{}).Where("season_num > 0 OR episode_num > 0"),
+	)
+	var rows []model.Media
+	if err := q.Find(&rows).Error; err != nil {
+		t.Fatal(err)
+	}
+	if len(rows) != 0 {
+		t.Fatalf("windows-style episodic path was not excluded, got %d rows", len(rows))
+	}
+
+	// 反证：电影类型的行必须保留。
+	var kept []model.Media
+	keepQ := filterLikelyEpisodicPathsFromMovieQuery(
+		db.Model(&model.Media{}).Where("path LIKE ?", `D:\Media\电影\%`),
+	)
+	if err := keepQ.Find(&kept).Error; err != nil {
+		t.Fatal(err)
+	}
+	if len(kept) != 1 || kept[0].ID != "mv-1" {
+		t.Fatalf("plain movie row was dropped from the movie query: %+v", kept)
+	}
+}

internal/service/emby_items_list.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
 )
 
 func (e *EmbyService) mediaItems(ctx context.Context, p ItemsParams) (map[string]any, error) {
@@ -21,7 +22,11 @@ func (e *EmbyService) mediaItems(ctx context.Context, p ItemsParams) (map[string
 		q = q.Where("library_id IN ? OR series_id = ?", e.mergedLibraryIDs(ctx, p.ParentID), p.ParentID)
 	}
 	if p.SearchTerm != "" {
-		q = q.Where("title LIKE ? OR original_name LIKE ?", "%"+p.SearchTerm+"%", "%"+p.SearchTerm+"%")
+		// ILIKE（PostgreSQL）/ LIKE（SQLite）由方言决定，避免换库后搜索词
+		// 大小写不匹配就搜不到结果。
+		likeOp := repository.LikeOperator(e.repo.DB)
+		term := "%" + p.SearchTerm + "%"
+		q = q.Where("title "+likeOp+" ? OR original_name "+likeOp+" ?", term, term)
 	}
 	if containsEmbyFilter(p.Filters, "IsFavorite") {
 		if strings.TrimSpace(p.UserID) == "" {
@@ -264,7 +269,11 @@ func (e *EmbyService) seriesItemsForLibrary(ctx context.Context, libraryID strin
 		q = q.Where("library_id IN ?", e.mergedLibraryIDs(ctx, libraryID))
 	}
 	if p.SearchTerm != "" {
-		q = q.Where("title LIKE ? OR original_name LIKE ?", "%"+p.SearchTerm+"%", "%"+p.SearchTerm+"%")
+		// ILIKE（PostgreSQL）/ LIKE（SQLite）由方言决定，避免换库后搜索词
+		// 大小写不匹配就搜不到结果。
+		likeOp := repository.LikeOperator(e.repo.DB)
+		term := "%" + p.SearchTerm + "%"
+		q = q.Where("title "+likeOp+" ? OR original_name "+likeOp+" ?", term, term)
 	}
 	if containsEmbyFilter(p.Filters, "IsFavorite") {
 		if strings.TrimSpace(p.UserID) == "" {

internal/service/emby_movie_items.go

@@ -9,6 +9,7 @@ import (
 	"gorm.io/gorm"
 
 	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
 )
 
 // movieLibraryHasEpisodicContent 报告电影类型库里是否混入了「剧集结构」内容
@@ -51,7 +52,11 @@ func (e *EmbyService) movieLibraryItems(ctx context.Context, p ItemsParams) (map
 		q = e.applyUserMediaVisibility(ctx, q, p.UserID)
 		q = q.Where("library_id IN ?", libIDs)
 		if p.SearchTerm != "" {
-			q = q.Where("title LIKE ? OR original_name LIKE ?", "%"+p.SearchTerm+"%", "%"+p.SearchTerm+"%")
+			// 方言相关的 ILIKE/LIKE：PostgreSQL 的 LIKE 区分大小写，
+			// 直接用 LIKE 会让客户端搜索的大小写与入库标题不一致时搜不到。
+			likeOp := repository.LikeOperator(e.repo.DB)
+			term := "%" + p.SearchTerm + "%"
+			q = q.Where("title "+likeOp+" ? OR original_name "+likeOp+" ?", term, term)
 		}
 		if containsEmbyFilter(p.Filters, "IsFavorite") {
 			if strings.TrimSpace(p.UserID) == "" {
@@ -266,6 +271,14 @@ func filterLikelyEpisodicPathsFromMovieQuery(q *gorm.DB) *gorm.DB {
 	return q.Where("NOT ((media.season_num > 0 OR media.episode_num > 0) AND ("+clause+"))", args...)
 }
 
+// embyEpisodicPathExpr 把路径分隔符归一化成 '/' 后再小写化，供剧集路径判定使用。
+//
+// 反斜杠归一化必须放在 SQL 里做，而不是再生成一份反斜杠模式：PostgreSQL 的
+// LIKE 默认就把反斜杠当转义符，模式结尾的 `\%` 会被解析成「字面百分号」而不是
+// 「反斜杠 + 通配符」，那些模式在 PostgreSQL 下永不命中（SQLite 没有默认转义符，
+// 所以只有换库之后才会暴露）。归一化列值后两种方言结果一致。
+const embyEpisodicPathExpr = `LOWER(REPLACE(media.path, '\', '/'))`
+
 func embyLikelyEpisodicPathSQL() (string, []any) {
 	patterns := []string{
 		"%/season %/%", "%/season.%/%", "%/season-%/%", "%/season_%/%",
@@ -274,15 +287,11 @@ func embyLikelyEpisodicPathSQL() (string, []any) {
 		"%/电视剧/%", "%/剧集/%", "%/连续剧/%", "%/短剧/%", "%/国产剧/%", "%/国剧/%", "%/大陆剧/%", "%/华语剧/%", "%/国产电视剧/%", "%/大陆电视剧/%", "%/华语电视剧/%", "%/欧美剧/%", "%/欧美电视剧/%", "%/美剧/%", "%/英剧/%", "%/日韩剧/%", "%/日韩电视剧/%", "%/日剧/%", "%/韩剧/%", "%/港剧/%", "%/台剧/%", "%/港台剧/%", "%/泰剧/%",
 		"%/日番/%", "%/国漫/%", "%/番剧/%", "%/动漫/%", "%/特别篇/%", "%/特別篇/%", "%/番外/%", "%/特典/%",
 	}
-	clauses := make([]string, 0, len(patterns)*2)
-	args := make([]any, 0, len(patterns)*2)
+	clauses := make([]string, 0, len(patterns))
+	args := make([]any, 0, len(patterns))
 	for _, pattern := range patterns {
-		clauses = append(clauses, "LOWER(media.path) LIKE ?")
+		clauses = append(clauses, embyEpisodicPathExpr+" LIKE ?")
 		args = append(args, pattern)
-		if strings.Contains(pattern, "/") {
-			clauses = append(clauses, "LOWER(media.path) LIKE ?")
-			args = append(args, strings.ReplaceAll(pattern, "/", `\`))
-		}
 	}
 	return strings.Join(clauses, " OR "), args
 }

internal/service/emby_remote.go

@@ -40,6 +40,23 @@ import (
 // embyRemoteHTTPTimeout 远程 Emby 常规 API 请求超时（流式代理不在此列）。
 const embyRemoteHTTPTimeout = 15 * time.Second
 
+// embyRemoteViewsBudget 是网页端聚合远程媒体库时的总时间预算。
+//
+// 上游 Emby 整体不可用时（典型表现：Cloudflare 522，连接卡住近 20 秒），
+// 首页 /api/libraries 会被同步阻塞，而前端 axios 30 秒就放弃，于是一个挂掉的
+// 远端会把整个首页拖成加载失败。这里给聚合调用一个硬预算：超时即降级为
+// 「只返回本地库」，把首屏确定性地控制在几秒内。
+var embyRemoteViewsBudget = 5 * time.Second
+
+// embyRemoteViewsFailureTTL 是远程 Views 拉取失败后的负缓存时长。
+//
+// 失败结果也缓存一小段时间，避免每个请求都重新等满预算（首页每次刷新、
+// 每个并发客户端都会各打一次）。时间很短，远端恢复后最多 30 秒即可自动重试。
+var embyRemoteViewsFailureTTL = 30 * time.Second
+
+// errRemoteViewsRecentlyFailed 表示远程 Emby 刚失败过，当前处于负缓存窗口。
+var errRemoteViewsRecentlyFailed = errors.New("远程 Emby 暂时不可用（近期请求失败，稍后自动重试）")
+
 // embyRemoteUA 桌面浏览器 UA：远程 Emby 前方若有 Cloudflare/WAF 会拦截
 // Go-http-client 等非浏览器 UA（403 error code: 1010），必须伪装浏览器。
 const embyRemoteUA = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36"
@@ -422,6 +439,22 @@ func (r *EmbyRemoteService) DeleteMount(ctx context.Context, id string) error {
 	return err
 }
 
+// SetMountsEnabled 批量启用/停用某账号下的全部挂载。
+//
+// 账号整体不可用时（远端宕机、线路全挂），管理员可以一键把所有挂载从媒体库
+// 中摘掉：网页端 /api/libraries 不再为该账号发起任何远程请求，首页恢复秒开；
+// 远端恢复后再一键启用即可，挂载配置和播放设置都不丢。
+func (r *EmbyRemoteService) SetMountsEnabled(ctx context.Context, accountID string, enabled bool) (int64, error) {
+	affected, err := r.repo.EmbyMount.SetEnabledByAccountID(ctx, accountID, enabled)
+	if err != nil {
+		return 0, err
+	}
+	// 启停会改变可见库集合，顺手清掉远程元数据缓存（含 Views 失败负缓存），
+	// 让下一次请求立刻按新状态重新探测，而不是继续吃 30 秒的负缓存。
+	r.invalidateRemoteMediaCache(ctx)
+	return affected, nil
+}
+
 // ReorderMounts 批量重排挂载媒体库顺序。
 func (r *EmbyRemoteService) ReorderMounts(ctx context.Context, ids []string) error {
 	if len(ids) == 0 {
@@ -822,7 +855,13 @@ func (r *EmbyRemoteService) TestConnection(ctx context.Context, acct *model.Strm
 		return err
 	}
 	var out json.RawMessage
-	return r.doGet(ctx, acct, cfg, "/System/Info", nil, &out)
+	if err := r.doGet(ctx, acct, cfg, "/System/Info", nil, &out); err != nil {
+		return err
+	}
+	// 连通性恢复：清掉 Views 失败负缓存与旧元数据，让下一次媒体库列表请求
+	// 立即重新探测，而不是继续在负缓存窗口里显示「没有远程库」。
+	r.invalidateRemoteMediaCache(ctx)
+	return nil
 }
 
 // ProxyPlayOf 返回账号是否配置了播放代理（供账号列表/编辑回显）。
@@ -837,7 +876,34 @@ func (r *EmbyRemoteService) ProxyPlayOf(acct *model.StrmAccount) (bool, error) {
 // ─── 元数据 / 目录聚合 ─────────────────────────────────────────────────────────
 
 // RemoteViews 拉取远程媒体库（View）列表，返回远程原始 view map（未重写）。
+//
+// 失败时写入短时负缓存：远程整站不可用时，避免每次首页刷新都重新等满超时。
 func (r *EmbyRemoteService) RemoteViews(ctx context.Context, acct *model.StrmAccount) ([]map[string]any, error) {
+	if acct == nil {
+		return nil, errors.New("缺少远程 Emby 账号")
+	}
+	failKey := r.remoteCacheKey("views-fail", acct.ID)
+	var failed bool
+	if r.cache != nil && r.cache.GetJSON(ctx, failKey, &failed) && failed {
+		return nil, errRemoteViewsRecentlyFailed
+	}
+	views, err := r.remoteViewsUncached(ctx, acct)
+	if err != nil {
+		// 客户端主动断开（切换页面 / 关标签）不算上游故障，不能让它把
+		// 负缓存窗口写进去，否则正常用户会被别人的一次取消拖慢 30 秒。
+		if r.cache != nil && !errors.Is(err, context.Canceled) {
+			r.cache.SetJSON(ctx, failKey, true, embyRemoteViewsFailureTTL)
+		}
+		return nil, err
+	}
+	if r.cache != nil {
+		r.cache.SetJSON(ctx, failKey, false, embyRemoteViewsFailureTTL)
+	}
+	return views, nil
+}
+
+// remoteViewsUncached 是 RemoteViews 的实际拉取逻辑（含正常结果缓存）。
+func (r *EmbyRemoteService) remoteViewsUncached(ctx context.Context, acct *model.StrmAccount) ([]map[string]any, error) {
 	cfg, err := r.remoteConfigWithToken(ctx, acct)
 	if err != nil {
 		return nil, err
@@ -1587,7 +1653,22 @@ func (r *EmbyRemoteService) proxyVideoStreamOnLine(ctx context.Context, w http.R
 	defer resp.Body.Close()
 	if resp.StatusCode >= 400 {
 		data, _ := io.ReadAll(io.LimitReader(resp.Body, 256))
-		return redactSensitiveError(fmt.Errorf("远程 Emby 视频流失败(%d): %s", resp.StatusCode, strings.TrimSpace(string(data))))
+		detail := strings.TrimSpace(string(data))
+		// 远程 Emby 对「整部剧/目录」这类自身没有媒体源的条目会直接 500，正文是
+		// 一句 .NET 异常（如 Unable to cast object of type 'Series' to type
+		// 'IHasMediaSources'）。原样丢给用户没人看得懂，也没有排查线索——细节进日志，
+		// 给用户一句能照着做的提示。
+		if r.log != nil {
+			r.log.Warn("remote emby video stream rejected",
+				zap.String("remote_id", remoteID),
+				zap.Int("status", resp.StatusCode),
+				zap.String("detail", detail),
+			)
+		}
+		if resp.StatusCode >= 500 {
+			return redactSensitiveError(fmt.Errorf("远程 Emby 无法播放该条目（HTTP %d）：请在详情页选择具体集数后重试", resp.StatusCode))
+		}
+		return redactSensitiveError(fmt.Errorf("远程 Emby 视频流失败(%d): %s", resp.StatusCode, detail))
 	}
 	for _, header := range []string{"Content-Type", "Content-Length", "Content-Range", "Accept-Ranges", "ETag", "Cache-Control"} {
 		if value := resp.Header.Get(header); value != "" {

internal/service/emby_remote_playable_id_test.go

@@ -0,0 +1,160 @@
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"sync/atomic"
+	"testing"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// newPlayableIDTestService 起一个假的远程 Emby，并建好账号。
+func newPlayableIDTestService(t *testing.T, handler http.Handler) (*EmbyRemoteService, *model.StrmAccount) {
+	t.Helper()
+	server := httptest.NewServer(handler)
+	t.Cleanup(server.Close)
+
+	db := newServiceTestDB(t, &model.StrmAccount{}, &model.EmbyMount{})
+	repos := repository.New(db)
+	cfg := &config.Config{}
+	remote := NewEmbyRemoteService(cfg, zap.NewNop(), repos, NewCryptoService("", zap.NewNop()))
+	remote.SetRuntimeCache(NewRuntimeCacheService(cfg, zap.NewNop()))
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            server.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	acct := &model.StrmAccount{
+		Base:     model.Base{ID: "acct-1"},
+		Name:     "远程 Emby",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}
+	if err := repos.StrmAccount.Create(t.Context(), acct); err != nil {
+		t.Fatalf("create account: %v", err)
+	}
+	return remote, acct
+}
+
+func playableIDTestEpisode(id string, index, sources int) map[string]any {
+	item := map[string]any{
+		"Id":                id,
+		"Name":              "第" + strconv.Itoa(index) + "集",
+		"Type":              "Episode",
+		"SeriesId":          "series-100",
+		"ParentIndexNumber": 1,
+		"IndexNumber":       index,
+	}
+	if sources > 0 {
+		item["MediaSources"] = []any{map[string]any{"Id": id + "-source"}}
+	}
+	return item
+}
+
+// 整部剧的 ID 自身没有媒体源，远程 Emby 对它的取流请求会回 500
+// （Unable to cast 'Series' to 'IHasMediaSources'）。这条用例保证我们会换成第一集，
+// 而不是把这种 ID 直接交给远程。
+func TestPlayableRemoteIDResolvesContainerToFirstEpisode(t *testing.T) {
+	var itemsCalls int64
+	remote, acct := newPlayableIDTestService(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		switch r.URL.Path {
+		case "/emby/Users/uid-1/Items/series-100":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Id": "series-100", "Name": "剧一", "Type": "Series", "IsFolder": true,
+			})
+		case "/emby/Users/uid-1/Items/ep-2":
+			_ = json.NewEncoder(w).Encode(playableIDTestEpisode("ep-2", 2, 1))
+		case "/emby/Users/uid-1/Items":
+			atomic.AddInt64(&itemsCalls, 1)
+			if got := r.URL.Query().Get("ParentId"); got != "series-100" {
+				t.Errorf("ParentId = %q, want series-100", got)
+			}
+			// 故意乱序，并让第一条没有媒体源：只有真按季/集排序、且检查过媒体源，
+			// 才会选中 ep-1。
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Items": []map[string]any{
+					{"Id": "season-1", "Type": "Season", "IndexNumber": 1},
+					playableIDTestEpisode("ep-3", 3, 1),
+					playableIDTestEpisode("ep-1", 1, 1),
+					playableIDTestEpisode("ep-2", 2, 1),
+				},
+			})
+		default:
+			w.WriteHeader(http.StatusNotFound)
+		}
+	}))
+
+	ctx := context.Background()
+	if got := remote.PlayableRemoteID(ctx, acct, "series-100"); got != "ep-1" {
+		t.Fatalf("series id resolved to %q, want ep-1", got)
+	}
+	// 播放器对同一个地址会反复发 Range 请求，解析结果必须命中缓存，不再打远程。
+	if got := remote.PlayableRemoteID(ctx, acct, "series-100"); got != "ep-1" {
+		t.Fatalf("cached resolve = %q, want ep-1", got)
+	}
+	if n := atomic.LoadInt64(&itemsCalls); n != 1 {
+		t.Fatalf("episode query issued %d times, want 1 (cached)", n)
+	}
+}
+
+// 本身带媒体源的条目（电影/单集）必须原样返回，不能被改写。
+func TestPlayableRemoteIDKeepsPlayableItem(t *testing.T) {
+	var queries int64
+	remote, acct := newPlayableIDTestService(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		atomic.AddInt64(&queries, 1)
+		w.Header().Set("Content-Type", "application/json")
+		if r.URL.Path != "/emby/Users/uid-1/Items/ep-2" {
+			t.Errorf("unexpected upstream path %s", r.URL.Path)
+		}
+		_ = json.NewEncoder(w).Encode(playableIDTestEpisode("ep-2", 2, 1))
+	}))
+
+	if got := remote.PlayableRemoteID(context.Background(), acct, "ep-2"); got != "ep-2" {
+		t.Fatalf("playable item = %q, want ep-2", got)
+	}
+	if n := atomic.LoadInt64(&queries); n != 1 {
+		t.Fatalf("upstream queries = %d, want 1", n)
+	}
+}
+
+// 远程不可用/查不到条目时保持原 ID：让原有流程去报错，别把播放地址改成空。
+func TestPlayableRemoteIDKeepsOriginalOnFailure(t *testing.T) {
+	remote, acct := newPlayableIDTestService(t, http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusNotFound)
+	}))
+
+	if got := remote.PlayableRemoteID(context.Background(), acct, "series-100"); got != "series-100" {
+		t.Fatalf("failure path = %q, want the original id", got)
+	}
+}
+
+// 容器下没有任何带媒体源的子条目时同样返回原 ID（下一层会给友好报错）。
+func TestPlayableRemoteIDKeepsContainerWithoutPlayableChild(t *testing.T) {
+	remote, acct := newPlayableIDTestService(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		if r.URL.Path == "/emby/Users/uid-1/Items" {
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Items": []map[string]any{
+					{"Id": "season-1", "Type": "Season", "IndexNumber": 1},
+				},
+			})
+			return
+		}
+		_ = json.NewEncoder(w).Encode(map[string]any{"Id": "series-100", "Type": "Series", "IsFolder": true})
+	}))
+
+	if got := remote.PlayableRemoteID(context.Background(), acct, "series-100"); got != "series-100" {
+		t.Fatalf("container without playable child = %q, want the original id", got)
+	}
+}

internal/service/emby_remote_stream_proxy_test.go

@@ -0,0 +1,84 @@
+package service
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"go.uber.org/zap"
+)
+
+// 远程条目自身没有媒体源时（例如把「整部剧」的 ID 当播放目标），远程 Emby 会回
+// 500 + 一句 .NET 异常。异常原文不能直接丢给用户，但要能从日志里查得到。
+func TestProxyVideoStreamOnLineHidesUpstreamException(t *testing.T) {
+	const upstreamBody = "Unable to cast object of type 'MediaBrowser.Controller.Entities.TV.Series' to type 'MediaBrowser.Controller.Entities.IHasMediaSources'."
+
+	var gotPath, gotStatic, gotRange, gotToken string
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		gotPath = req.URL.Path
+		gotStatic = req.URL.Query().Get("Static")
+		gotRange = req.Header.Get("Range")
+		gotToken = req.Header.Get("X-Emby-Token")
+		w.WriteHeader(http.StatusInternalServerError)
+		_, _ = w.Write([]byte(upstreamBody))
+	}))
+	defer upstream.Close()
+
+	svc := &EmbyRemoteService{stream: upstream.Client(), log: zap.NewNop()}
+	cfg := &EmbyRemoteConfig{BaseURL: upstream.URL, Token: "tok-1"}
+
+	req := httptest.NewRequest(http.MethodGet, "/api/stream/embyremote~acct~222679", nil)
+	req.Header.Set("Range", "bytes=0-1023")
+	rec := httptest.NewRecorder()
+
+	err := svc.proxyVideoStreamOnLine(context.Background(), rec, req, cfg, "222679")
+	if err == nil {
+		t.Fatal("expected an error for upstream 500")
+	}
+	if gotPath != "/emby/Videos/222679/stream" {
+		t.Fatalf("upstream path = %q", gotPath)
+	}
+	if gotStatic != "true" {
+		t.Fatalf("Static = %q, want true", gotStatic)
+	}
+	if gotRange != "bytes=0-1023" {
+		t.Fatalf("Range = %q, want forwarded range", gotRange)
+	}
+	if gotToken != "tok-1" {
+		t.Fatalf("X-Emby-Token = %q", gotToken)
+	}
+	if rec.Body.Len() != 0 {
+		t.Fatalf("nothing should be written to the client on upstream failure, got %q", rec.Body.String())
+	}
+
+	msg := err.Error()
+	if strings.Contains(msg, "Unable to cast") || strings.Contains(msg, "MediaBrowser") {
+		t.Fatalf("raw upstream exception must not leak to clients: %q", msg)
+	}
+	if !strings.Contains(msg, "无法播放该条目") {
+		t.Fatalf("error should tell the user what to do, got %q", msg)
+	}
+}
+
+// 4xx（例如远程条目被删除/无权限）保持原有措辞，带着上游说明便于排查。
+func TestProxyVideoStreamOnLineKeepsClientErrorDetail(t *testing.T) {
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusNotFound)
+		_, _ = w.Write([]byte("Item not found"))
+	}))
+	defer upstream.Close()
+
+	svc := &EmbyRemoteService{stream: upstream.Client(), log: zap.NewNop()}
+	cfg := &EmbyRemoteConfig{BaseURL: upstream.URL, Token: "tok-1"}
+
+	req := httptest.NewRequest(http.MethodGet, "/api/stream/embyremote~acct~404", nil)
+	err := svc.proxyVideoStreamOnLine(context.Background(), httptest.NewRecorder(), req, cfg, "404")
+	if err == nil {
+		t.Fatal("expected an error for upstream 404")
+	}
+	if !strings.Contains(err.Error(), "404") || !strings.Contains(err.Error(), "Item not found") {
+		t.Fatalf("client error detail should be kept, got %q", err.Error())
+	}
+}

internal/service/emby_remote_views_cache_test.go

@@ -0,0 +1,155 @@
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// TestRemoteLibrariesFastFailAndNegativeCache 覆盖首页可用的底线保证：
+// 上游 Emby 整体挂起时，聚合远程库必须在一个很短的预算内失败并降级为
+// 「没有远程库」，并且在负缓存窗口内不再重复打上游。
+func TestRemoteLibrariesFastFailAndNegativeCache(t *testing.T) {
+	oldBudget, oldTTL := embyRemoteViewsBudget, embyRemoteViewsFailureTTL
+	embyRemoteViewsBudget = 200 * time.Millisecond
+	embyRemoteViewsFailureTTL = time.Minute
+	t.Cleanup(func() {
+		embyRemoteViewsBudget = oldBudget
+		embyRemoteViewsFailureTTL = oldTTL
+	})
+
+	release := make(chan struct{})
+	var hits int32
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		atomic.AddInt32(&hits, 1)
+		// 模拟 Cloudflare 522 前近 20 秒的挂起：请求一直不返回。
+		select {
+		case <-release:
+		case <-time.After(10 * time.Second):
+		}
+	}))
+	defer upstream.Close()
+	defer close(release)
+
+	db := newServiceTestDB(t, &model.StrmAccount{}, &model.EmbyMount{})
+	repos := repository.New(db)
+	remote := NewEmbyRemoteService(&config.Config{}, zap.NewNop(), repos, NewCryptoService("", zap.NewNop())).
+		SetRuntimeCache(NewRuntimeCacheService(nil, zap.NewNop()))
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            upstream.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	acct := &model.StrmAccount{
+		Base:     model.Base{ID: "acct-hang"},
+		Name:     "挂起的远端",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}
+	if err := repos.StrmAccount.Create(t.Context(), acct); err != nil {
+		t.Fatalf("create account: %v", err)
+	}
+	mount := &model.EmbyMount{
+		Base:           model.Base{ID: "mount-hang"},
+		AccountID:      acct.ID,
+		RemoteViewID:   "view-1",
+		RemoteViewName: "卡住的库",
+		CollectionType: "movies",
+		Enabled:        true,
+	}
+	if err := repos.EmbyMount.Create(t.Context(), mount); err != nil {
+		t.Fatalf("create mount: %v", err)
+	}
+
+	start := time.Now()
+	views, err := remote.RemoteLibraries(t.Context())
+	elapsed := time.Since(start)
+	if err != nil {
+		t.Fatalf("RemoteLibraries should degrade instead of failing: %v", err)
+	}
+	if len(views) != 0 {
+		t.Fatalf("expected no remote libraries while upstream hangs, got %d", len(views))
+	}
+	if elapsed > 2*time.Second {
+		t.Fatalf("RemoteLibraries took %v, want within the short budget", elapsed)
+	}
+	if atomic.LoadInt32(&hits) == 0 {
+		t.Fatal("expected upstream to be probed once")
+	}
+
+	// 负缓存窗口内：不再打上游，且立即返回空结果。
+	before := atomic.LoadInt32(&hits)
+	start = time.Now()
+	views, err = remote.RemoteLibraries(t.Context())
+	elapsed = time.Since(start)
+	if err != nil {
+		t.Fatalf("second RemoteLibraries should not fail: %v", err)
+	}
+	if len(views) != 0 {
+		t.Fatalf("expected no remote libraries from negative cache, got %d", len(views))
+	}
+	if elapsed > time.Second {
+		t.Fatalf("negative cache should answer immediately, took %v", elapsed)
+	}
+	if got := atomic.LoadInt32(&hits); got != before {
+		t.Fatalf("negative cache should skip upstream, hits went %d -> %d", before, got)
+	}
+}
+
+// TestRemoteViewsNotNegativeCachedOnClientCancel 保证客户端主动断开不会污染
+// 负缓存：否则一个用户切页就会让所有人在 30 秒内看不到远程库。
+func TestRemoteViewsNotNegativeCachedOnClientCancel(t *testing.T) {
+	release := make(chan struct{})
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		select {
+		case <-release:
+		case <-time.After(10 * time.Second):
+		}
+	}))
+	defer upstream.Close()
+	defer close(release)
+
+	db := newServiceTestDB(t, &model.StrmAccount{}, &model.EmbyMount{})
+	repos := repository.New(db)
+	cache := NewRuntimeCacheService(nil, zap.NewNop())
+	remote := NewEmbyRemoteService(&config.Config{}, zap.NewNop(), repos, NewCryptoService("", zap.NewNop())).
+		SetRuntimeCache(cache)
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            upstream.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	acct := &model.StrmAccount{
+		Base:     model.Base{ID: "acct-cancel"},
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}
+	if err := repos.StrmAccount.Create(t.Context(), acct); err != nil {
+		t.Fatalf("create account: %v", err)
+	}
+
+	ctx, cancel := context.WithCancel(t.Context())
+	cancel()
+	if _, err := remote.RemoteViews(ctx, acct); err == nil {
+		t.Fatal("expected canceled context to fail")
+	}
+
+	var failed bool
+	if cache.GetJSON(t.Context(), remote.remoteCacheKey("views-fail", acct.ID), &failed) && failed {
+		t.Fatal("client cancel must not write the negative cache")
+	}
+}

internal/service/emby_remote_web.go

@@ -35,6 +35,12 @@ type RemoteLibraryView struct {
 // RemoteLibraries 把所有启用挂载的远程媒体库映射为网页媒体库列表
 // （只有显式挂载的库才出现在本项目媒体库中）。
 func (r *EmbyRemoteService) RemoteLibraries(ctx context.Context) ([]RemoteLibraryView, error) {
+	// 远程库只是「追加」到本地库列表上，绝不允许它拖住整页首屏：给整段
+	// 聚合（多账号 × 多线路故障转移）一个总预算，超时后各账号按失败处理，
+	// 调用方随即降级为只返回本地库。
+	ctx, cancel := context.WithTimeout(ctx, embyRemoteViewsBudget)
+	defer cancel()
+
 	mounts, err := r.ListMounts(ctx)
 	if err != nil || len(mounts) == 0 {
 		return nil, err
@@ -820,6 +826,123 @@ func (r *EmbyRemoteService) remoteItemSeriesID(ctx context.Context, acct *model.
 	return remoteItemString(out, "SeriesId")
 }
 
+// PlayableRemoteID 把「自身没有媒体源」的远程条目换成可直接播放的条目 ID。
+//
+// 远程 Emby 只为带媒体源的条目提供 /Videos/{id}/stream：拿整部剧/季/目录的 ID 去
+// 请求，它会回 500 加一句 .NET 异常（Unable to cast object of type 'Series' to
+// type 'IHasMediaSources'）。首页轮播、剧集库卡片、外部播放器与第三方客户端都可能
+// 把这种 ID 交过来，统一在这里回落到第一集，保证拿到的 ID 真能取到流。
+//
+// 条目本身可播、或解析失败时返回原 ID（调用方拿到后用原逻辑处理即可，无需区分错误）。
+func (r *EmbyRemoteService) PlayableRemoteID(ctx context.Context, acct *model.StrmAccount, remoteID string) string {
+	remoteID = strings.TrimSpace(remoteID)
+	if r == nil || acct == nil || remoteID == "" {
+		return remoteID
+	}
+	cfg, err := r.remoteConfigWithToken(ctx, acct)
+	if err != nil {
+		return remoteID
+	}
+	cacheKey := r.remoteCacheKey("playable-remote-id", acct.ID, remoteID)
+	if r.cache != nil {
+		var cached string
+		// 播放器会对同一个地址发很多次 Range 请求，判定结果必须走缓存，否则每次拖动
+		// 进度条都要多打两次远程 Emby。缓存比常规媒体缓存长：条目可播性是静态属性。
+		if r.cache.GetJSON(ctx, cacheKey, &cached) {
+			if cached == "" {
+				return remoteID
+			}
+			return cached
+		}
+	}
+	resolved := r.resolvePlayableRemoteID(ctx, acct, cfg, remoteID)
+	// 解析失败不写缓存：远程抖动时下次照样重试，而不是把「播不了」记住十分钟。
+	if r.cache != nil && resolved != "" {
+		r.cache.SetJSON(ctx, cacheKey, resolved, playableRemoteIDCacheTTL)
+	}
+	if resolved == "" {
+		return remoteID
+	}
+	return resolved
+}
+
+// playableRemoteIDCacheTTL 是「条目可播性」判定的缓存时长。
+const playableRemoteIDCacheTTL = 10 * time.Minute
+
+// resolvePlayableRemoteID 返回 remoteID 对应的可播条目：本身带媒体源时原样返回，
+// 容器条目（整部剧/季/目录）返回排在最前的、确实带媒体源的子条目。
+func (r *EmbyRemoteService) resolvePlayableRemoteID(ctx context.Context, acct *model.StrmAccount, cfg *EmbyRemoteConfig, remoteID string) string {
+	var item map[string]any
+	if err := r.doGet(ctx, acct, cfg, "/Users/"+url.PathEscape(r.remoteUserID(cfg))+"/Items/"+url.PathEscape(remoteID), nil, &item); err != nil {
+		return ""
+	}
+	if remoteItemHasMediaSources(item) || !remoteItemIsContainer(item) {
+		return remoteID
+	}
+
+	q := url.Values{}
+	q.Set("ParentId", remoteID)
+	q.Set("Recursive", "true")
+	q.Set("IncludeItemTypes", "Episode,Movie,Video")
+	q.Set("Fields", "MediaSources")
+	q.Set("SortBy", "ParentIndexNumber,IndexNumber,SortName")
+	q.Set("Limit", "50")
+	var body struct {
+		Items []map[string]any `json:"Items"`
+	}
+	if err := r.doGet(ctx, acct, cfg, "/Users/"+url.PathEscape(r.remoteUserID(cfg))+"/Items", q, &body); err != nil {
+		return ""
+	}
+
+	// 远程 SortBy 只覆盖它认识的字段（不同 Emby/Jellyfin 版本支持度不一），
+	// 这里再按季/集排一次，确保拿到的是第一集而不是服务端返回顺序里的第一条。
+	children := body.Items
+	sort.SliceStable(children, func(i, j int) bool {
+		if a, b := remoteItemInt(children[i], "ParentIndexNumber"), remoteItemInt(children[j], "ParentIndexNumber"); a != b {
+			return a < b
+		}
+		if a, b := remoteItemInt(children[i], "IndexNumber"), remoteItemInt(children[j], "IndexNumber"); a != b {
+			return a < b
+		}
+		return remoteItemString(children[i], "SortName") < remoteItemString(children[j], "SortName")
+	})
+	for _, child := range children {
+		if id := remoteItemString(child, "Id"); id != "" && remoteItemHasMediaSources(child) {
+			return id
+		}
+	}
+	return ""
+}
+
+// remoteItemHasMediaSources 该条目是否自带媒体源（即能直接取流）。
+func remoteItemHasMediaSources(item map[string]any) bool {
+	if item == nil {
+		return false
+	}
+	switch sources := item["MediaSources"].(type) {
+	case []any:
+		return len(sources) > 0
+	case []map[string]any:
+		return len(sources) > 0
+	}
+	return false
+}
+
+// remoteItemIsContainer 该条目是否是「装别人」的容器：整部剧/季/目录/合集。
+func remoteItemIsContainer(item map[string]any) bool {
+	switch remoteItemString(item, "Type") {
+	case "Series", "Season", "Folder", "BoxSet", "CollectionFolder", "AggregateFolder", "Playlist":
+		return true
+	}
+	// 类型缺失时退回 IsFolder（Emby 的目录类条目都会带）。
+	if _, ok := item["Type"]; !ok {
+		if isFolder, okBool := item["IsFolder"].(bool); okBool {
+			return isFolder
+		}
+	}
+	return false
+}
+
 // ─── 远程 item JSON 取值辅助 ────────────────────────────────────────────────
 
 func anyString(v any) string {

internal/service/favorites_sync.go

@@ -35,16 +35,28 @@ func IsUserFavorite(ctx context.Context, repo *repository.Container, userID, med
 func setLocalFavorite(ctx context.Context, repo *repository.Container, userID, mediaID string, favorite bool) error {
 	if favorite {
 		var existing model.Favorite
-		err := repo.DB.WithContext(ctx).
+		// 收藏行的删除是软删除；重新收藏时必须连已软删除的行一起查出来，
+		// 否则会再次插入同一 (user_id, media_id)，撞上唯一索引后稳定返回
+		// 500，用户表现为“取消收藏后无法再收藏”。
+		err := repo.DB.WithContext(ctx).Unscoped().
 			Where("user_id = ? AND media_id = ?", userID, mediaID).
 			First(&existing).Error
-		if errors.Is(err, gorm.ErrRecordNotFound) {
+		switch {
+		case errors.Is(err, gorm.ErrRecordNotFound):
 			return repo.DB.WithContext(ctx).Create(&model.Favorite{
 				UserID:  userID,
 				MediaID: mediaID,
 			}).Error
+		case err != nil:
+			return err
+		case existing.DeletedAt.Valid:
+			return repo.DB.WithContext(ctx).Unscoped().
+				Model(&model.Favorite{}).
+				Where("id = ?", existing.ID).
+				Update("deleted_at", nil).Error
+		default:
+			return nil
 		}
-		return err
 	}
 	return repo.DB.WithContext(ctx).
 		Where("user_id = ? AND media_id = ?", userID, mediaID).

internal/service/favorites_sync_test.go

@@ -44,6 +44,19 @@ func TestSyncUserFavoriteWritesLocalForRemoteID(t *testing.T) {
 	if favorite {
 		t.Fatal("expected remote favourite to be removed locally")
 	}
+
+	// 软删除后重新收藏必须恢复原行：唯一索引 (user_id, media_id) 不允许
+	// 再插入一条，旧的实现会在这里返回约束错误。
+	if err := SyncUserFavorite(context.Background(), repos, nil, userID, remoteMediaID, true); err != nil {
+		t.Fatalf("SyncUserFavorite re-favorite: %v", err)
+	}
+	favorite, err = IsUserFavorite(context.Background(), repos, userID, remoteMediaID)
+	if err != nil {
+		t.Fatalf("IsUserFavorite after re-favorite: %v", err)
+	}
+	if !favorite {
+		t.Fatal("expected re-favourite to restore the soft-deleted row")
+	}
 }
 
 func TestFavoriteItemsIncludesRemoteFavourites(t *testing.T) {

internal/service/ffmpeg_tools_test.go

@@ -49,6 +49,8 @@ func TestSafeZipTargetRejectsTraversal(t *testing.T) {
 }
 
 func TestFFmpegToolsStatusNoPanic(t *testing.T) {
+	t.Setenv("PATH", t.TempDir())
+	t.Chdir(t.TempDir())
 	svc := NewFFmpegToolsService(&config.Config{}, zap.NewNop(), nil)
 	st := svc.Status(context.Background())
 	for _, key := range []string{"installing", "message", "error", "install_dir", "target", "ffmpeg", "ffprobe"} {

internal/service/image_proxy.go

@@ -14,14 +14,12 @@ package service
 
 import (
 	"context"
-	"errors"
 	"net"
 	"net/http"
 	"path/filepath"
 	"runtime"
 	"strings"
 	"sync"
-	"syscall"
 	"time"
 
 	"go.uber.org/zap"
@@ -103,53 +101,14 @@ func NewImageProxy(cfg *config.Config, log *zap.Logger) *ImageProxy {
 	// from image.tmdb.org via their HTTP proxy without extra config. On
 	// Windows we also honor the current user's system proxy settings.
 	transport := NewExternalTransport()
-	if proxyConfiguredForImageFetch() {
-		// 走本地代理（如 127.0.0.1:7890）时，拨号目标是代理本身，
-		// 连接层 SSRF 校验会误杀本地回环代理；此时沿用 URL 级校验。
-		log.Info("image proxy: outbound proxy detected, connection-level SSRF guard disabled")
-	} else {
-		// 仅 URL 解析层的 isPrivateHost 可被十进制/十六进制 IP、解析到
-		// 私网的域名与 DNS rebinding 绕过；在拨号层对最终连接 IP 做二次
-		// 校验（含重定向后的每条连接）堵住该旁路。
-		// 用户明确配置的远程挂载源（如内网 Emby）豁免该私网限制。
-		dialer := &net.Dialer{
-			Timeout: 15 * time.Second,
-			Control: func(_, address string, _ syscall.RawConn) error {
-				host, _, err := net.SplitHostPort(address)
-				if err != nil {
-					return err
-				}
-				if proxy.isAllowedRemoteHost(host) {
-					return nil
-				}
-				ip := net.ParseIP(host)
-				if ip == nil {
-					return errors.New("image proxy: refusing non-IP dial target")
-				}
-				if isPrivateIP(ip) {
-					return errors.New("image proxy: requests to private/internal hosts are not allowed")
-				}
-				return nil
-			},
-		}
-		transport.DialContext = dialer.DialContext
-	}
-
+	proxy.guardTransport(transport)
+	directTransport := NewInternalTransport()
+	proxy.guardTransport(directTransport)
 	proxy.client = &http.Client{Timeout: 30 * time.Second, Transport: transport}
-	proxy.directClient = &http.Client{Timeout: 30 * time.Second, Transport: NewInternalTransport()}
+	proxy.directClient = &http.Client{Timeout: 30 * time.Second, Transport: directTransport}
 	return proxy
 }
 
-// proxyConfiguredForImageFetch 探测环境变量或系统代理是否会影响图片抓取。
-func proxyConfiguredForImageFetch() bool {
-	req, err := http.NewRequest(http.MethodGet, "https://image.tmdb.org/", nil)
-	if err != nil {
-		return false
-	}
-	proxy, err := ProxyFromEnvironmentOrSystem(req)
-	return err == nil && proxy != nil
-}
-
 // SetLibraryRootsProvider injects a callback that returns the current set of
 // media library root directories. Sidecar posters live under these roots
 // (which are arbitrary, user-defined, and not necessarily under the

internal/service/image_proxy_allowed_hosts.go

@@ -0,0 +1,193 @@
+package service
+
+import (
+	"context"
+	"net"
+	"net/url"
+	"sort"
+	"strings"
+
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// 显式配置的服务地址也要进入图片代理的私网放行名单。
+//
+// 背景（现场 2026-10-16）：MetaTube 刮削后端被配置成 docker 服务名
+// `http://mebox-metatube-1:8081`，刮削结果里的 poster_url 就是这个地址。
+// 图片代理的连接层 SSRF 校验只放行远程 Emby 挂载主机，于是每一次封面回源都
+// 被拒（日志 warn: requests to private/internal hosts are not allowed），
+// 前端长期只拿到占位图。
+//
+// 这里的取舍与 isPrivateHost 的注释一致：私网校验防的是「用户可控 URL 打到
+// 内网」，而管理员显式配置的服务地址属于受信输入，和远程 Emby 挂载同级。
+func configuredServiceImageHosts(values ...string) []string {
+	seen := make(map[string]struct{}, len(values))
+	out := make([]string, 0, len(values))
+	for _, raw := range values {
+		host := imageHostFromBaseURL(raw)
+		if host == "" {
+			continue
+		}
+		if _, ok := seen[host]; ok {
+			continue
+		}
+		seen[host] = struct{}{}
+		out = append(out, host)
+	}
+	sort.Strings(out)
+	return out
+}
+
+// internalServiceImageHosts 只保留指向内网/局域网的服务地址。
+//
+// 公网域名（image.tmdb.org、api.themoviedb.org 等）必须留在名单之外：放行后
+// 图片代理会优先走直连客户端，而 GFW 环境恰恰需要先用 HTTP(S)_PROXY。把它们
+// 加进来会让每张海报都白付一次直连失败。
+func internalServiceImageHosts(values ...string) []string {
+	hosts := configuredServiceImageHosts(values...)
+	out := make([]string, 0, len(hosts))
+	for _, host := range hosts {
+		if isInternalServiceHost(host) {
+			out = append(out, host)
+		}
+	}
+	return out
+}
+
+// isInternalServiceHost 判断主机名是否只在内网可达：私网/回环/链路本地 IP、
+// 单标签服务名（docker compose 服务名如 mebox-metatube-1），或常见的内部域名后缀。
+func isInternalServiceHost(host string) bool {
+	host = strings.ToLower(strings.TrimSpace(host))
+	if host == "" {
+		return false
+	}
+	if ip := net.ParseIP(host); ip != nil {
+		return isPrivateIP(ip)
+	}
+	// 单标签名（不含点）不是公网可解析的 FQDN，只可能是容器名/主机名。
+	if !strings.Contains(host, ".") {
+		return true
+	}
+	for _, suffix := range []string{".local", ".internal", ".lan", ".home.arpa", ".localhost"} {
+		if strings.HasSuffix(host, suffix) {
+			return true
+		}
+	}
+	return false
+}
+
+// imageHostFromBaseURL 从配置里的 base URL 取出小写主机名（不含端口）。
+// 容忍缺少 scheme 的写法（`mebox-metatube-1:8081`），并拒绝非 http/https。
+func imageHostFromBaseURL(raw string) string {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return ""
+	}
+	if !strings.Contains(raw, "://") {
+		raw = "http://" + raw
+	}
+	u, err := url.Parse(raw)
+	if err != nil {
+		return ""
+	}
+	switch strings.ToLower(u.Scheme) {
+	case "http", "https":
+	default:
+		return ""
+	}
+	return strings.ToLower(strings.TrimSpace(u.Hostname()))
+}
+
+// mergeImageProxyAllowedHosts 合并多组放行主机（远程 Emby 挂载 + 显式配置的
+// 服务地址），去重时忽略大小写与端口。
+func mergeImageProxyAllowedHosts(groups ...[]string) []string {
+	seen := make(map[string]struct{})
+	out := make([]string, 0)
+	for _, group := range groups {
+		for _, raw := range group {
+			host := strings.ToLower(strings.TrimSpace(raw))
+			if host == "" {
+				continue
+			}
+			if h, _, err := net.SplitHostPort(host); err == nil {
+				host = strings.ToLower(strings.TrimSpace(h))
+			}
+			if host == "" {
+				continue
+			}
+			if _, ok := seen[host]; ok {
+				continue
+			}
+			seen[host] = struct{}{}
+			out = append(out, host)
+		}
+	}
+	sort.Strings(out)
+	return out
+}
+
+// imageMintingSettingKeys 是「其取值会被拼进图片 URL」的设置项。
+//
+// 只收录这类设置：放行名单每多一条就是多一处 SSRF 例外，因此 app.server_url、
+// strm.base_url 这些只出现在播放地址里的设置不在此列（它们由 streamURL 使用，
+// 与 /api/img 无关）。
+var imageMintingSettingKeys = []string{
+	"adult.scraper.metatube_server",
+	"adult.scraper.builtin_javdb_url",
+	"adult.scraper.builtin_javbus_url",
+}
+
+// imageMintingAPIProviders 是「其 base_url 会被拼进图片 URL」的 api_configs 行。
+//
+// 同样刻意收窄：api_configs 里每个 provider 都有一行出厂默认值，其中 metatube
+// 默认指向 http://127.0.0.1:7700。把整张表都放行会让每次安装都无条件放开回环
+// 地址，而只有真正用 MetaTube 刮削的部署才需要这个例外。
+var imageMintingAPIProviders = []string{"metatube"}
+
+// configuredServiceImageHostsFromRepo 从持久化配置里收集「会被写进图片 URL」的
+// 内网服务地址。只在构造阶段调用一次，所以直接读库、忽略错误——读不到只是少
+// 一条放行，不影响启动。
+func configuredServiceImageHostsFromRepo(ctx context.Context, repos *repository.Container) []string {
+	if repos == nil {
+		return nil
+	}
+	values := make([]string, 0, 4)
+
+	if repos.Setting != nil {
+		for _, key := range imageMintingSettingKeys {
+			if val, err := repos.Setting.Get(ctx, key); err == nil && strings.TrimSpace(val) != "" {
+				values = append(values, val)
+			}
+		}
+	}
+
+	if repos.ApiConfig != nil {
+		// 用 List 而不是 FindByProvider：后者走 First()，缺行时 gorm 会打一条
+		// "record not found" 日志，而「没配置 MetaTube」是完全正常的状态。
+		if rows, err := repos.ApiConfig.List(ctx); err == nil {
+			for _, row := range rows {
+				if !imageMintingAPIProvider(row.Provider) {
+					continue
+				}
+				if strings.TrimSpace(row.BaseURL) != "" {
+					values = append(values, row.BaseURL)
+				}
+				// Extra 是逗号/分号分隔的备用源列表（见 api_config.go 的 adult 默认值）。
+				values = append(values, adultConfiguredBases(row.Extra)...)
+			}
+		}
+	}
+
+	return internalServiceImageHosts(values...)
+}
+
+func imageMintingAPIProvider(provider string) bool {
+	provider = strings.ToLower(strings.TrimSpace(provider))
+	for _, allowed := range imageMintingAPIProviders {
+		if provider == allowed {
+			return true
+		}
+	}
+	return false
+}
+

internal/service/image_proxy_allowed_hosts_test.go

@@ -0,0 +1,249 @@
+package service
+
+import (
+	"context"
+	"sort"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// 现场（2026-10-16）：13 条媒体记录的 poster_url 指向
+// http://mebox-metatube-1:8081/v1/images/primary/... ，而图片代理只放行
+// 远程 Emby 挂载主机。MetaTube 是用户显式配置的刮削后端（settings 里的
+// adult.scraper.metatube_server），它跑在 docker 私网里，于是每一次封面
+// 回源都被连接层 SSRF 校验拒掉，日志刷 warn，前端长期只拿到占位图。
+//
+// 结论：显式配置的服务地址必须和远程 Emby 一样被加入放行名单。
+func TestConfiguredServiceImageHostsExtractsHostnames(t *testing.T) {
+	got := configuredServiceImageHosts(
+		"http://mebox-metatube-1:8081",
+		"https://api.themoviedb.org/3",
+		"http://192.168.1.50:8096/emby",
+	)
+	want := []string{"192.168.1.50", "api.themoviedb.org", "mebox-metatube-1"}
+	if len(got) != len(want) {
+		t.Fatalf("hosts = %v, want %v", got, want)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("hosts = %v, want %v", got, want)
+		}
+	}
+}
+
+func TestConfiguredServiceImageHostsNormalizesAndDedupes(t *testing.T) {
+	got := configuredServiceImageHosts(
+		"  HTTP://MeBox-MetaTube-1:8081  ",
+		"http://mebox-metatube-1:8081/other/path",
+		"mebox-metatube-1:8081",
+	)
+	if len(got) != 1 || got[0] != "mebox-metatube-1" {
+		t.Fatalf("hosts = %v, want exactly [mebox-metatube-1]", got)
+	}
+}
+
+func TestConfiguredServiceImageHostsSkipsUnusableValues(t *testing.T) {
+	got := configuredServiceImageHosts(
+		"",
+		"   ",
+		"not a url at all",
+		"http://",
+		"://missing-scheme",
+		"/relative/path",
+		"ftp://files.example.com",
+	)
+	if len(got) != 0 {
+		t.Fatalf("hosts = %v, want none", got)
+	}
+}
+
+func TestConfiguredServiceImageHostsPreservesIPv6(t *testing.T) {
+	got := configuredServiceImageHosts("http://[fd00::5]:8081")
+	if len(got) != 1 || got[0] != "fd00::5" {
+		t.Fatalf("hosts = %v, want [fd00::5]", got)
+	}
+}
+
+func TestImageProxyAllowlistCombinesMountsAndConfiguredServices(t *testing.T) {
+	// 回归：合并后的名单必须同时覆盖远程 Emby 挂载与显式配置的服务，
+	// 否则两组图片里必有一组被 SSRF 校验挡住。
+	proxy := newUpstreamImageProxy(t)
+	proxy.SetAllowedRemoteHostsProvider(func() []string {
+		return mergeImageProxyAllowedHosts(
+			[]string{"192.168.1.50"},
+			configuredServiceImageHosts("http://mebox-metatube-1:8081"),
+		)
+	})
+
+	for _, host := range []string{"192.168.1.50", "mebox-metatube-1"} {
+		if !proxy.isAllowedRemoteHost(host) {
+			t.Fatalf("host %q must bypass the private-IP guard", host)
+		}
+	}
+	if proxy.isAllowedRemoteHost("evil.example.com") {
+		t.Fatal("unrelated hosts must stay blocked")
+	}
+}
+
+func TestMergeImageProxyAllowedHostsDedupesCaseInsensitively(t *testing.T) {
+	got := mergeImageProxyAllowedHosts(
+		[]string{"192.168.1.50:8096", "MeBox-MetaTube-1"},
+		[]string{"mebox-metatube-1", "", "  ", "192.168.1.50"},
+	)
+	sort.Strings(got)
+	want := []string{"192.168.1.50", "mebox-metatube-1"}
+	if len(got) != len(want) {
+		t.Fatalf("merged = %v, want %v", got, want)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("merged = %v, want %v", got, want)
+		}
+	}
+}
+
+// 公网上游必须留在名单之外：放行后图片代理会优先走直连，而 GFW 环境恰恰要靠
+// HTTP(S)_PROXY 才能取到 image.tmdb.org 这类海报。只有内网地址才需要豁免。
+func TestInternalServiceImageHostsKeepsOnlyInternalAddresses(t *testing.T) {
+	got := internalServiceImageHosts(
+		"http://mebox-metatube-1:8081",
+		"http://127.0.0.1:7700",
+		"http://192.168.1.50:8096",
+		"https://api.themoviedb.org/3",
+		"https://image.tmdb.org",
+		"https://api.bgm.tv",
+		"https://javdb.com",
+		"http://nas.local:7700",
+		"http://media.internal",
+	)
+	want := []string{
+		"127.0.0.1",
+		"192.168.1.50",
+		"mebox-metatube-1",
+		"media.internal",
+		"nas.local",
+	}
+	sort.Strings(want)
+	if len(got) != len(want) {
+		t.Fatalf("hosts = %v, want %v", got, want)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("hosts = %v, want %v", got, want)
+		}
+	}
+}
+
+func TestIsInternalServiceHost(t *testing.T) {
+	internal := []string{
+		"mebox-metatube-1", "127.0.0.1", "10.1.2.3", "172.18.0.5",
+		"192.168.1.50", "fd00::5", "nas.local", "media.internal",
+		"box.lan", "db.home.arpa",
+	}
+	for _, host := range internal {
+		if !isInternalServiceHost(host) {
+			t.Errorf("isInternalServiceHost(%q) = false, want true", host)
+		}
+	}
+	external := []string{
+		"", "api.themoviedb.org", "image.tmdb.org", "www.javbus.com",
+		"pics.dmm.co.jp", "8.8.8.8", "example.com",
+	}
+	for _, host := range external {
+		if isInternalServiceHost(host) {
+			t.Errorf("isInternalServiceHost(%q) = true, want false", host)
+		}
+	}
+}
+
+// 端到端装配：从真实的 settings / api_configs 里读出内网服务地址。
+// 现场数据是 settings.adult.scraper.metatube_server = http://mebox-metatube-1:8081，
+// 而 api_configs.metatube.base_url 还是出厂默认的 http://127.0.0.1:7700。
+func TestConfiguredServiceImageHostsFromRepoReadsSettingsAndAPIConfigs(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("failed to open sqlite: %v", err)
+	}
+	if err := db.AutoMigrate(&model.Setting{}, &model.APIConfig{}); err != nil {
+		t.Fatalf("migrate: %v", err)
+	}
+	repos := repository.New(db)
+	ctx := context.Background()
+
+	if err := repos.Setting.Set(ctx, "adult.scraper.metatube_server", "http://mebox-metatube-1:8081"); err != nil {
+		t.Fatal(err)
+	}
+	if err := repos.Setting.Set(ctx, "adult.scraper.builtin_javdb_url", "https://javdb.com"); err != nil {
+		t.Fatal(err)
+	}
+	for _, row := range []model.APIConfig{
+		{Provider: "metatube", BaseURL: "http://127.0.0.1:7700", Enabled: true},
+		{Provider: "tmdb", BaseURL: "https://api.themoviedb.org/3", Enabled: true},
+		{Provider: "openai", BaseURL: "http://192.168.1.77:11434/v1", Enabled: true},
+	} {
+		if err := repos.ApiConfig.Create(ctx, &row); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	got := configuredServiceImageHostsFromRepo(ctx, repos)
+	// javdb.com / api.themoviedb.org 是公网地址，必须留在名单之外（否则图片
+	// 代理会改走直连，GFW 环境下反而取不到图）；openai 的 base_url 虽然指向
+	// 内网，但它从不产出图片 URL，同样不应成为 SSRF 例外。
+	want := []string{"127.0.0.1", "mebox-metatube-1"}
+	sort.Strings(want)
+	if len(got) != len(want) {
+		t.Fatalf("hosts = %v, want %v", got, want)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("hosts = %v, want %v", got, want)
+		}
+	}
+}
+
+// 放行名单是 SSRF 例外，必须收窄：只有「会产出图片 URL」的配置才入选。
+func TestConfiguredServiceImageHostsFromRepoIgnoresUnrelatedInternalServices(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("failed to open sqlite: %v", err)
+	}
+	if err := db.AutoMigrate(&model.Setting{}, &model.APIConfig{}); err != nil {
+		t.Fatalf("migrate: %v", err)
+	}
+	repos := repository.New(db)
+	ctx := context.Background()
+
+	// 只配置了内网的 OpenAI 兼容网关与内网下载器，没有任何图片来源。
+	if err := repos.Setting.Set(ctx, "app.server_url", "http://10.0.0.2:1314"); err != nil {
+		t.Fatal(err)
+	}
+	if err := repos.Setting.Set(ctx, "strm.base_url", "http://10.0.0.2:1314"); err != nil {
+		t.Fatal(err)
+	}
+	for _, row := range []model.APIConfig{
+		{Provider: "openai", BaseURL: "http://192.168.1.77:11434/v1", Enabled: true},
+		{Provider: "tmdb", BaseURL: "https://api.themoviedb.org/3", Enabled: true},
+	} {
+		if err := repos.ApiConfig.Create(ctx, &row); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	if got := configuredServiceImageHostsFromRepo(ctx, repos); len(got) != 0 {
+		t.Fatalf("hosts = %v, want none: unrelated internal services must not become SSRF exceptions", got)
+	}
+}
+
+func TestConfiguredServiceImageHostsFromRepoToleratesMissingRepos(t *testing.T) {
+	if got := configuredServiceImageHostsFromRepo(context.Background(), nil); len(got) != 0 {
+		t.Fatalf("hosts = %v, want none", got)
+	}
+}
+
+

internal/service/image_proxy_dial_allowlist_test.go

@@ -0,0 +1,112 @@
+package service
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"path/filepath"
+	"testing"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+)
+
+// hostAndPortOf 从测试服务器的 URL 里取出主机名与端口。
+func hostAndPortOf(t *testing.T, raw string) (string, string) {
+	t.Helper()
+	u, err := url.Parse(raw)
+	if err != nil {
+		t.Fatalf("parse upstream url: %v", err)
+	}
+	return u.Hostname(), u.Port()
+}
+
+// 现场（2026-10-16，生产容器内实测）：放行名单里明明有 mebox-metatube-1，
+// 回源仍然失败于
+//
+//	image proxy: requests to private/internal hosts are not allowed
+//
+// 原因：连接层校验（dialer 的 Control 回调）拿到的 address 是**解析后的 IP**，
+// 而名单里存的是主机名（ConfiguredRemoteHosts 与
+// configuredServiceImageHostsFromRepo 都返回 u.Hostname()），两者永远不相等：
+// 那段 isAllowedRemoteHost 分支对主机名条目是死代码。
+//
+// 远程 Emby 挂载用 IP 配置时看不出问题，用主机名（NAS 名、docker 服务名）配置
+// 时同样中招。这个用例锁住「按主机名放行」这条路径。
+func TestImageProxyDialsAllowlistedHostname(t *testing.T) {
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "image/jpeg")
+		_, _ = w.Write(testJPEG)
+	}))
+	defer upstream.Close()
+
+	proxy := NewImageProxy(
+		&config.Config{Cache: config.CacheConfig{CacheDir: filepath.Join(t.TempDir(), "cache")}},
+		zap.NewNop(),
+	)
+	// 名单里放「主机名」而不是 IP —— 这正是生产里 mebox-metatube-1 的形态。
+	proxy.SetAllowedRemoteHostsProvider(func() []string { return []string{"localhost"} })
+
+	// 直接用该代理自己的 transport 拨号，才能命中连接层校验。
+	_, port := hostAndPortOf(t, upstream.URL)
+	resp, err := proxy.client.Get("http://localhost:" + port + "/poster.jpg")
+	if err != nil {
+		t.Fatalf("allowlisted hostname must be dialable, got: %v", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("status = %d, want 200", resp.StatusCode)
+	}
+}
+
+// 反向约束：未放行的主机名解析到私网地址时仍必须被拒。
+// 这是连接层校验存在的理由（DNS rebinding），不能为了修上面那条而拆掉。
+func TestImageProxyStillBlocksUnlistedHostnameResolvingToPrivateIP(t *testing.T) {
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		_, _ = w.Write(testJPEG)
+	}))
+	defer upstream.Close()
+
+	proxy := NewImageProxy(
+		&config.Config{Cache: config.CacheConfig{CacheDir: filepath.Join(t.TempDir(), "cache")}},
+		zap.NewNop(),
+	)
+	// 名单为空：localhost 解析到回环地址，必须被拦。
+	proxy.SetAllowedRemoteHostsProvider(func() []string { return nil })
+
+	_, port := hostAndPortOf(t, upstream.URL)
+	for _, client := range []*http.Client{proxy.client, proxy.directClient} {
+		resp, err := client.Get("http://localhost:" + port + "/poster.jpg")
+		if err == nil {
+			resp.Body.Close()
+			t.Fatal("a non-allowlisted hostname resolving to a private IP must be refused")
+		}
+	}
+}
+
+func TestImageProxyAllowsSelectedLocalProxy(t *testing.T) {
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "image/jpeg")
+		_, _ = w.Write(testJPEG)
+	}))
+	defer upstream.Close()
+	proxyURL, err := url.Parse(upstream.URL)
+	if err != nil {
+		t.Fatal(err)
+	}
+	p := NewImageProxy(&config.Config{}, zap.NewNop())
+	transport := NewExternalTransport()
+	transport.Proxy = http.ProxyURL(proxyURL)
+	p.guardTransport(transport)
+	t.Cleanup(transport.CloseIdleConnections)
+	client := &http.Client{Transport: transport}
+	resp, err := client.Get("http://images.example.com/poster.jpg")
+	if err != nil {
+		t.Fatalf("configured local proxy must remain usable: %v", err)
+	}
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("status=%d, want 200", resp.StatusCode)
+	}
+}

internal/service/image_proxy_live_verify_test.go

@@ -0,0 +1,152 @@
+// 在真实 docker 网络里验证图片代理的私网放行名单修复。
+//
+// 现场（修复前）：MetaTube 刮削结果里的 poster_url 指向
+// http://mebox-metatube-1:8081/... ，而放行名单只含远程 Emby 挂载主机，
+// 于是每一次封面回源都被连接层 SSRF 校验拒掉，前端长期只拿到占位图。
+//
+// 本文件用与 service_builder.initImageProxy 相同的装配方式复现那条路径。
+// 真实回源那一步只在能解析到 MetaTube 服务名的环境里跑（生产容器网络）；
+// 开发机上会 Skip，因为那属于环境缺失，不是回归。
+//
+// 在生产机上运行的姿势（无需 Go 工具链）：
+//
+//	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go test -c -o /tmp/verify.test ./internal/service
+//	scp /tmp/verify.test root@HOST:/tmp/ && ssh root@HOST \
+//	  'docker cp /tmp/verify.test mebox:/tmp/ && docker exec mebox /tmp/verify.test \
+//	   -test.run TestImageProxyFetchesFromMetaTubeService -test.v'
+package service
+
+import (
+	"context"
+	"errors"
+	"net"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// 与生产环境一致的两个取值（取自 10.0.0.2 上真实的 settings / api_configs）。
+const (
+	metaTubeServer = "http://mebox-metatube-1:8081"
+	metaTubeLegacy = "http://127.0.0.1:7700"
+	sampleImageURL = "http://mebox-metatube-1:8081/v1/images/primary/JAV321/dsam-15"
+)
+
+// newMetaTubeVerificationRepos 建一个带现场取值的临时库（不碰生产数据）。
+func newMetaTubeVerificationRepos(t *testing.T) (*repository.Container, *ImageProxy) {
+	t.Helper()
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("open sqlite: %v", err)
+	}
+	if err := db.AutoMigrate(&model.Setting{}, &model.APIConfig{}); err != nil {
+		t.Fatalf("migrate: %v", err)
+	}
+	repos := repository.New(db)
+	ctx := context.Background()
+	if err := repos.Setting.Set(ctx, "adult.scraper.metatube_server", metaTubeServer); err != nil {
+		t.Fatalf("seed setting: %v", err)
+	}
+	if err := repos.ApiConfig.Create(ctx, &model.APIConfig{
+		Provider: "metatube", BaseURL: metaTubeLegacy, Enabled: true,
+	}); err != nil {
+		t.Fatalf("seed metatube api config: %v", err)
+	}
+	// 一个公网上游，用来确认它没有混进放行名单。
+	if err := repos.ApiConfig.Create(ctx, &model.APIConfig{
+		Provider: "tmdb", BaseURL: "https://api.themoviedb.org/3", Enabled: true,
+	}); err != nil {
+		t.Fatalf("seed tmdb api config: %v", err)
+	}
+
+	cfg := &config.Config{Cache: config.CacheConfig{CacheDir: filepath.Join(t.TempDir(), "cache")}}
+	cfg.Secrets.JWTSecret = "verify-secret"
+	proxy := NewImageProxy(cfg, zap.NewNop())
+	// 与 service_builder.initImageProxy 相同的装配方式（无远程 Emby 挂载：
+	// 本次只验证「显式配置的服务地址」这条路径）。
+	proxy.SetAllowedRemoteHostsProvider(func() []string {
+		return mergeImageProxyAllowedHosts(
+			nil,
+			configuredServiceImageHostsFromRepo(ctx, repos),
+		)
+	})
+	return repos, proxy
+}
+
+// TestImageProxyAllowlistIncludesConfiguredMetaTube 确认内网服务地址被放行、
+// 公网上游没有被放行。
+func TestImageProxyAllowlistIncludesConfiguredMetaTube(t *testing.T) {
+	repos, proxy := newMetaTubeVerificationRepos(t)
+	t.Logf("allowlist from config: %v",
+		configuredServiceImageHostsFromRepo(context.Background(), repos))
+
+	for _, host := range []string{"mebox-metatube-1", "127.0.0.1"} {
+		if !proxy.isAllowedRemoteHost(host) {
+			t.Fatalf("host %q must be allowlisted (it is an explicitly configured service)", host)
+		}
+	}
+	if proxy.isAllowedRemoteHost("api.themoviedb.org") {
+		t.Fatal("public upstreams must stay off the allowlist so image fetches keep using the proxy")
+	}
+}
+
+// TestImageProxyReachesMetaTubeService 证明放行名单真的解除了私网拦截。
+//
+// 现场（修复前）回源必然失败于
+//
+//	dial tcp 172.18.0.5:8081: image proxy: requests to private/internal hosts are not allowed
+//
+// 也就是连接根本没发生。修复后连接成功，失败只可能来自上游自己的 HTTP 状态
+// （MetaTube 冷缓存时对未刮削过的番号返回 500）。
+//
+// 因此这个用例断言的不是「拿到 200」，而是**「不再是被私网校验拒绝」**：
+// 后者才是本次修复的对象，前者取决于 MetaTube 缓存里有没有那条记录。
+func TestImageProxyReachesMetaTubeService(t *testing.T) {
+	_, proxy := newMetaTubeVerificationRepos(t)
+
+	data, ctype, err := proxy.Fetch(context.Background(), sampleImageURL)
+	if err != nil {
+		if isMetaTubeUnreachable(err) {
+			t.Skipf("mebox-metatube-1 is not reachable from this environment: %v", err)
+		}
+		if isPrivateHostRejection(err) {
+			t.Fatalf("the allowlist did not take effect: %v", err)
+		}
+		// 连接已经建立，只是上游自己返回了错误状态（MetaTube 冷缓存）。
+		t.Logf("reached metaTube; upstream returned its own error: %v", err)
+		return
+	}
+	t.Logf("fetched %d bytes (content-type=%s)", len(data), ctype)
+	if len(data) == 0 {
+		t.Fatal("fetched an empty image body")
+	}
+}
+
+// isPrivateHostRejection 报告错误是否来自连接层的私网校验。
+// 这正是本次修复必须消除的那一类失败。
+func isPrivateHostRejection(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "requests to private/internal hosts are not allowed")
+}
+
+// isMetaTubeUnreachable 区分「环境里没有这个服务」与「放行名单没生效」。
+func isMetaTubeUnreachable(err error) bool {
+	var dnsErr *net.DNSError
+	if errors.As(err, &dnsErr) {
+		return true
+	}
+	msg := strings.ToLower(err.Error())
+	for _, needle := range []string{"no such host", "server misbehaving", "i/o timeout", "connection refused"} {
+		if strings.Contains(msg, needle) {
+			return true
+		}
+	}
+	return false
+}

internal/service/image_proxy_remote_fetch.go

@@ -32,7 +32,9 @@ func (p *ImageProxy) remoteImageFetchClients(host string) []remoteImageFetchClie
 	}
 	direct := p.directClient
 	if direct == nil {
-		direct = &http.Client{Timeout: timeout, Transport: NewInternalTransport()}
+		transport := NewInternalTransport()
+		p.guardTransport(transport)
+		direct = &http.Client{Timeout: timeout, Transport: transport}
 	}
 	directCandidate := remoteImageFetchClient{name: "direct", client: direct}
 	defaultCandidate := remoteImageFetchClient{name: "default", client: client}

internal/service/image_proxy_transport.go

@@ -0,0 +1,67 @@
+package service
+
+import (
+	"context"
+	"errors"
+	"net"
+	"net/http"
+	"net/url"
+	"strings"
+	"sync"
+	"syscall"
+	"time"
+)
+
+// guardTransport checks resolved destination addresses even when a deployment
+// has an outbound proxy. Only actual proxy endpoints and explicitly configured
+// image services may use private addresses; NO_PROXY and direct fallback
+// requests still need the connection-level check against DNS rebinding.
+func (p *ImageProxy) guardTransport(transport *http.Transport) {
+	var proxyEndpoints sync.Map
+	if selectProxy := transport.Proxy; selectProxy != nil {
+		transport.Proxy = func(req *http.Request) (*url.URL, error) {
+			proxyURL, err := selectProxy(req)
+			if err == nil && proxyURL != nil {
+				port := proxyURL.Port()
+				if port == "" {
+					switch strings.ToLower(proxyURL.Scheme) {
+					case "https":
+						port = "443"
+					case "socks5", "socks5h":
+						port = "1080"
+					default:
+						port = "80"
+					}
+				}
+				proxyEndpoints.Store(net.JoinHostPort(strings.ToLower(proxyURL.Hostname()), port), true)
+			}
+			return proxyURL, err
+		}
+	}
+	guardDialer := &net.Dialer{
+		Timeout: 15 * time.Second,
+		Control: func(_, address string, _ syscall.RawConn) error {
+			host, _, err := net.SplitHostPort(address)
+			if err != nil {
+				return err
+			}
+			ip := net.ParseIP(host)
+			if ip == nil || isPrivateIP(ip) {
+				return errors.New("image proxy: requests to private/internal hosts are not allowed")
+			}
+			return nil
+		},
+	}
+	trustedDialer := &net.Dialer{Timeout: 15 * time.Second}
+	transport.DialContext = func(ctx context.Context, network, address string) (net.Conn, error) {
+		host, _, err := net.SplitHostPort(address)
+		if err != nil {
+			return nil, err
+		}
+		_, isProxyEndpoint := proxyEndpoints.Load(strings.ToLower(address))
+		if isProxyEndpoint || p.isAllowedRemoteHost(host) {
+			return trustedDialer.DialContext(ctx, network, address)
+		}
+		return guardDialer.DialContext(ctx, network, address)
+	}
+}