重构核心模块并同步更新项目配置与相关实现

cmd/server/logging.go

@@ -98,3 +98,41 @@ func logFilePaths(cfg *config.Config) (string, string, string) {
 	}
 	return filepath.Join(out, "app.log"), filepath.Join(out, "warn.log"), filepath.Join(out, "error.log")
 }
+
+// newEmbyCompatLogger 构建只写入 Emby 兼容日志文件的独立 Zap 实例。
+// 它不参与 app.log 的日志级别过滤，始终记录 INFO 及以上，确保成功请求也能
+// 用于还原客户端的接口调用顺序；轮转参数沿用 logging 配置。
+func newEmbyCompatLogger(cfg *config.Config) (*zap.Logger, func(), error) {
+	encoderCfg := zap.NewProductionEncoderConfig()
+	encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder
+	var encoder zapcore.Encoder
+	if strings.EqualFold(strings.TrimSpace(cfg.Logging.Format), "console") {
+		encoder = zapcore.NewConsoleEncoder(encoderCfg)
+	} else {
+		encoder = zapcore.NewJSONEncoder(encoderCfg)
+	}
+
+	writer, err := newRotatingFileWriter(embyCompatLogPath(cfg), cfg.Logging)
+	if err != nil {
+		return nil, nil, err
+	}
+	log := zap.New(
+		zapcore.NewCore(encoder, writer, zap.InfoLevel),
+		zap.AddCaller(),
+		zap.AddStacktrace(zapcore.ErrorLevel),
+		zap.ErrorOutput(zapcore.Lock(os.Stderr)),
+	)
+	return log, func() { _ = writer.Close() }, nil
+}
+
+func embyCompatLogPath(cfg *config.Config) string {
+	out := strings.TrimSpace(cfg.Logging.OutputPath)
+	if out == "" || strings.EqualFold(out, "stdout") || strings.EqualFold(out, "stderr") {
+		return filepath.Join(cfg.App.DataDir, "logs", "emby-compat.log")
+	}
+	if ext := filepath.Ext(out); ext != "" {
+		base := strings.TrimSuffix(out, ext)
+		return base + ".emby-compat" + ext
+	}
+	return filepath.Join(out, "emby-compat.log")
+}

cmd/server/logging_test.go

@@ -116,3 +116,34 @@ func TestRotatingFileWriterCapsFileSize(t *testing.T) {
 	}
 	_ = writer.Sync()
 }
+
+func TestEmbyCompatLoggerWritesDedicatedFile(t *testing.T) {
+	dir := t.TempDir()
+	cfg := &config.Config{}
+	cfg.App.DataDir = dir
+	cfg.Logging.Format = "json"
+	cfg.Logging.OutputPath = filepath.Join(dir, "logs")
+	cfg.Logging.EnableRotation = true
+	cfg.Logging.MaxSizeMB = 1
+	cfg.Logging.MaxBackups = 2
+
+	log, closeFn, err := newEmbyCompatLogger(cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	log.Info("emby request", zap.String("client", "Infuse"))
+	_ = log.Sync()
+	closeFn()
+
+	path := filepath.Join(dir, "logs", "emby-compat.log")
+	data, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(data), "emby request") || !strings.Contains(string(data), "Infuse") {
+		t.Fatalf("dedicated Emby log missing request data: %s", data)
+	}
+	if _, err := os.Stat(filepath.Join(dir, "logs", "app.log")); !os.IsNotExist(err) {
+		t.Fatalf("Emby logger must not write app.log, stat err=%v", err)
+	}
+}

cmd/server/main.go

@@ -59,11 +59,21 @@ func main() {
 	}
 	defer func() { _ = logger.Sync() }()
 
+	embyCompatLogger, closeEmbyCompatLogger, err := newEmbyCompatLogger(cfg)
+	if err != nil {
+		logger.Fatal("Emby compatibility logger init failed", zap.Error(err))
+	}
+	defer func() {
+		_ = embyCompatLogger.Sync()
+		closeEmbyCompatLogger()
+	}()
+
 	appVersion := effectiveVersion(version)
 	logger.Info("starting MeBox",
 		zap.String("version", appVersion),
 		zap.Int("port", cfg.App.Port),
 		zap.String("data_dir", cfg.App.DataDir),
+		zap.String("emby_compat_log", embyCompatLogPath(cfg)),
 	)
 
 	// Ensure data / cache / web dirs exist.
@@ -104,7 +114,7 @@ func main() {
 		logger.Warn("seed admin failed", zap.Error(err))
 	}
 
-	router := buildRouter(cfg, logger, services)
+	router := buildRouter(cfg, logger, embyCompatLogger, services)
 
 	serverMgr := newServerManager(cfg, logger, router)
 	services.ReloadHTTPServer = serverMgr.Reload

cmd/server/router.go

@@ -19,13 +19,16 @@ import (
 	"github.com/truewhile/MeBox/web"
 )
 
-func buildRouter(cfg *config.Config, logger *zap.Logger, svc *service.Container) *gin.Engine {
+func buildRouter(cfg *config.Config, logger *zap.Logger, embyCompatLogger *zap.Logger, svc *service.Container) *gin.Engine {
 	if !cfg.App.Debug {
 		gin.SetMode(gin.ReleaseMode)
 	}
 	r := gin.New()
 	r.Use(gin.Recovery())
 	r.Use(middleware.RequestLogger(logger))
+	r.Use(middleware.EmbyCompatLogger(embyCompatLogger, func(path string) bool {
+		return !isFrontendLibraryRoute(path) && handler.IsEmbyPath(path)
+	}))
 	if !cfg.App.Debug && len(cfg.App.CORSOrigins) == 0 {
 		logger.Warn("CORS: no origins configured in production — CORS headers will be omitted (same-origin enforced). Set app.cors_origins for cross-origin access.")
 	}

internal/config/config_test.go

@@ -46,6 +46,9 @@ func TestLoadDefaults(t *testing.T) {
 	if cfg.Cache.MediaTTLSeconds != 90 {
 		t.Fatalf("expected default media cache ttl 90, got %d", cfg.Cache.MediaTTLSeconds)
 	}
+	if cfg.Cache.MemoryMaxSizeMB != DefaultCacheMemoryMaxSizeMB {
+		t.Fatalf("expected default runtime cache memory limit %d, got %d", DefaultCacheMemoryMaxSizeMB, cfg.Cache.MemoryMaxSizeMB)
+	}
 	if cfg.Search.Index != "mebox_media" {
 		t.Fatalf("expected default search index, got %q", cfg.Search.Index)
 	}
@@ -88,6 +91,7 @@ func TestEnvOverride(t *testing.T) {
 	t.Setenv("MEBOX_DATABASE_DSN", "postgres://mebox:secret@postgres:5432/mebox?sslmode=disable")
 	t.Setenv("MEBOX_CACHE_REDIS_URL", "redis://redis:6379/0")
 	t.Setenv("MEBOX_CACHE_MEDIA_TTL_SECONDS", "30")
+	t.Setenv("MEBOX_CACHE_MEMORY_MAX_SIZE_MB", "48")
 	t.Setenv("MEBOX_SEARCH_BACKEND", "opensearch")
 	t.Setenv("MEBOX_SEARCH_OPENSEARCH_URL", "http://opensearch:9200")
 	t.Setenv("MEBOX_LICENSE_SERVER_URL", "https://license.example.com")
@@ -103,8 +107,8 @@ func TestEnvOverride(t *testing.T) {
 	if cfg.Database.Type != "postgres" || cfg.Database.DSN == "" {
 		t.Fatalf("expected postgres database config from env, got type=%q dsn=%q", cfg.Database.Type, cfg.Database.DSN)
 	}
-	if cfg.Cache.RedisURL != "redis://redis:6379/0" || cfg.Cache.MediaTTLSeconds != 30 {
-		t.Fatalf("expected redis cache config from env, got url=%q ttl=%d", cfg.Cache.RedisURL, cfg.Cache.MediaTTLSeconds)
+	if cfg.Cache.RedisURL != "redis://redis:6379/0" || cfg.Cache.MediaTTLSeconds != 30 || cfg.Cache.MemoryMaxSizeMB != 48 {
+		t.Fatalf("expected redis cache config from env, got url=%q ttl=%d memory=%d", cfg.Cache.RedisURL, cfg.Cache.MediaTTLSeconds, cfg.Cache.MemoryMaxSizeMB)
 	}
 	if cfg.Search.Backend != "opensearch" || cfg.Search.OpenSearchURL != "http://opensearch:9200" {
 		t.Fatalf("expected opensearch config from env, got backend=%q url=%q", cfg.Search.Backend, cfg.Search.OpenSearchURL)

internal/config/defaults.go

@@ -7,6 +7,7 @@ const (
 	defaultDatabaseMaxIdleConns = 4
 	defaultLicenseServerURL     = "https://mgosever.3jzs.com"
 	defaultLicensePublicKey     = "MCowBQYDK2VwAyEABRXnXy+urjrbKit6Yu/HiezWgP0NdsZW3tsegJWRrtI="
+	DefaultCacheMemoryMaxSizeMB = 128
 )
 
 func setDefaults(v *viper.Viper) {
@@ -44,6 +45,7 @@ func setDefaults(v *viper.Viper) {
 
 	v.SetDefault("cache.cache_dir", "./cache")
 	v.SetDefault("cache.images_max_size_mb", 500)
+	v.SetDefault("cache.memory_max_size_mb", DefaultCacheMemoryMaxSizeMB)
 	v.SetDefault("cache.cleanup_interval_min", 60)
 	v.SetDefault("cache.redis_url", "")
 	v.SetDefault("cache.redis_prefix", "mebox")

internal/config/normalize.go

@@ -47,6 +47,9 @@ func (c *Config) normalize() error {
 	if c.Cache.ImagesMaxSizeMB < 0 {
 		c.Cache.ImagesMaxSizeMB = 0
 	}
+	if c.Cache.MemoryMaxSizeMB <= 0 {
+		c.Cache.MemoryMaxSizeMB = DefaultCacheMemoryMaxSizeMB
+	}
 	if c.Cache.RedisPrefix == "" {
 		c.Cache.RedisPrefix = "mebox"
 	}

internal/config/types.go

@@ -113,10 +113,12 @@ type LoggingConfig struct {
 	MaxBackups     int    `mapstructure:"max_backups"`
 }
 
-// CacheConfig 控制磁盘转码/刮削缓存。
+// CacheConfig 控制磁盘转写缓存和进程内热缓存。
 type CacheConfig struct {
-	CacheDir           string `mapstructure:"cache_dir"`
-	ImagesMaxSizeMB    int    `mapstructure:"images_max_size_mb"`
+	CacheDir        string `mapstructure:"cache_dir"`
+	ImagesMaxSizeMB int    `mapstructure:"images_max_size_mb"`
+	// MemoryMaxSizeMB 限制进程内 L1 缓存总字节数，JSON/对象缓存共用该预算。
+	MemoryMaxSizeMB    int    `mapstructure:"memory_max_size_mb"`
 	MaxDiskUsageMB     int    `mapstructure:"max_disk_usage_mb"`
 	TTLHours           int    `mapstructure:"ttl_hours"`
 	AutoCleanup        bool   `mapstructure:"auto_cleanup"`

internal/handler/admin_settings.go

@@ -68,6 +68,9 @@ func updateSettingHandler(svc *service.Container) gin.HandlerFunc {
 		if req.Key == "cache.images_max_size_mb" && svc.Scheduler != nil {
 			_ = svc.Scheduler.RunNowAsync(c.Request.Context(), "image_cache_cleanup")
 		}
+		if req.Key == "cache.memory_max_size_mb" && svc.Cache != nil {
+			svc.Cache.SetMaxSizeMB(svc.Cfg.Cache.MemoryMaxSizeMB)
+		}
 		c.Status(http.StatusNoContent)
 	}
 }

internal/handler/emby_mounted_resume_test.go

@@ -68,7 +68,7 @@ func TestMountedEmbyPlayingProgressAndResumePipeline(t *testing.T) {
 	// 1. 测试上报进度：客户端使用小写 query 参数 itemId / positionTicks
 	progressReq := httptest.NewRequest(
 		http.MethodPost,
-		"/Sessions/Playing/Progress?itemId="+remoteMediaID+"&positionTicks=300000000&runTimeTicks=1000000000",
+		"/Sessions/Playing/Progress?itemId="+remoteMediaID+"&positionTicks=300000000&runTimeTicks=1000000000&playSessionId=remote-mount-1-2000000000000",
 		nil,
 	)
 	wProgress := httptest.NewRecorder()
@@ -85,6 +85,9 @@ func TestMountedEmbyPlayingProgressAndResumePipeline(t *testing.T) {
 	if hist.PositionMs != 30000 {
 		t.Fatalf("expected position_ms = 30000, got %d", hist.PositionMs)
 	}
+	if hist.SessionID != "remote-mount-1-2000000000000" || hist.SessionStartedAtMs != 2000000000000 {
+		t.Fatalf("unexpected playback session metadata: %#v", hist)
+	}
 
 	// 2. 测试 Filters=IsResumable 能够包含该远程条目
 	resumableReq := httptest.NewRequest(

internal/handler/emby_path_compat_test.go

@@ -0,0 +1,32 @@
+package handler
+
+import "testing"
+
+func TestIsEmbyPath(t *testing.T) {
+	tests := []struct {
+		path string
+		want bool
+	}{
+		{path: "/emby", want: true},
+		{path: "/emby/System/Info/Public", want: true},
+		{path: "//emby//Items//1", want: true},
+		{path: "/System/Info/Public", want: true},
+		{path: "/Search/Hints", want: true},
+		{path: "/Playback/BitrateTest", want: true},
+		{path: "/api/unknown", want: false},
+		{path: "/library/123e4567-e89b-12d3-a456-426614174000", want: true},
+		{path: "/random/path", want: false},
+	}
+	for _, tt := range tests {
+		if got := IsEmbyPath(tt.path); got != tt.want {
+			t.Errorf("IsEmbyPath(%q) = %v, want %v", tt.path, got, tt.want)
+		}
+	}
+}
+
+func TestNormalizeEmbyPrefixedInternalAPIPath(t *testing.T) {
+	got, changed := NormalizeEmbyPath("/emby/api/Stream/123")
+	if !changed || got != "/emby/api/stream/123" {
+		t.Fatalf("NormalizeEmbyPath() = (%q, %v), want (/emby/api/stream/123, true)", got, changed)
+	}
+}

internal/handler/emby_path_normalize.go

@@ -88,6 +88,92 @@ var embyStaticSegments = map[string]struct{}{
 	"embywebsocket":          {},
 }
 
+var embyRootSegments = map[string]struct{}{
+	"albums":             {},
+	"artists":            {},
+	"audio":              {},
+	"audiocodecs":        {},
+	"auth":               {},
+	"branding":           {},
+	"channels":           {},
+	"collections":        {},
+	"connect":            {},
+	"containers":         {},
+	"devices":            {},
+	"displaypreferences": {},
+	"dlna":               {},
+	"encoding":           {},
+	"environment":        {},
+	"gamegenres":         {},
+	"games":              {},
+	"genres":             {},
+	"images":             {},
+	"items":              {},
+	"libraries":          {},
+	"library":            {},
+	"livestreams":        {},
+	"livetv":             {},
+	"localization":       {},
+	"movies":             {},
+	"musicgenres":        {},
+	"news":               {},
+	"notification":       {},
+	"notifications":      {},
+	"officialratings":    {},
+	"packages":           {},
+	"persons":            {},
+	"playback":           {},
+	"playlists":          {},
+	"plugins":            {},
+	"providers":          {},
+	"reports":            {},
+	"scheduledtasks":     {},
+	"search":             {},
+	"sessions":           {},
+	"shows":              {},
+	"songs":              {},
+	"studios":            {},
+	"subtitlecodecs":     {},
+	"sync":               {},
+	"system":             {},
+	"tags":               {},
+	"trailers":           {},
+	"user_usage_stats":   {},
+	"users":              {},
+	"videocodecs":        {},
+	"videos":             {},
+	"years":              {},
+}
+
+func isEmbyRootSegment(segment string) bool {
+	if _, ok := embyRootSegments[segment]; ok {
+		return true
+	}
+	_, ok := embyStaticSegments[segment]
+	return ok
+}
+
+// IsEmbyPath 判断路径是否属于 Emby/Jellyfin 兼容面的命名空间。
+// 除显式 /emby 前缀外，Emby 客户端也会直接请求客户端协议的根路径，
+// 例如 /System/Info/Public、/Users/Public、/Sessions。
+func IsEmbyPath(path string) bool {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return false
+	}
+	path = multipleSlashesRE.ReplaceAllString(path, "/")
+	lower := strings.ToLower(path)
+	if lower == "/emby" || strings.HasPrefix(lower, "/emby/") {
+		return true
+	}
+
+	segments := strings.Split(strings.Trim(path, "/"), "/")
+	if len(segments) == 0 || segments[0] == "" {
+		return false
+	}
+	return isEmbyRootSegment(strings.ToLower(segments[0]))
+}
+
 // NormalizeEmbyPath 规范化 Emby 请求路径：
 // 1. 折叠重复斜杠（如 //emby/ -> /emby/）；
 // 2. 折叠重复前缀（如 /emby/emby/System/Info -> /emby/System/Info）；
@@ -132,7 +218,7 @@ func NormalizeEmbyPath(p string) (string, bool) {
 
 	// 检查第一段是否为 Emby 根路由关键字
 	firstLower := strings.ToLower(segments[0])
-	if _, ok := embyStaticSegments[firstLower]; !ok && firstLower != "api" {
+	if !isEmbyRootSegment(firstLower) && firstLower != "api" {
 		// 不是 Emby 相关路径，保持原样
 		return original, false
 	}

internal/handler/emby_playstate_handlers.go

@@ -19,6 +19,8 @@ type embyPlayingReq struct {
 	PositionLower int64  `json:"positionTicks"`
 	RunTimeTicks  int64  `json:"RunTimeTicks"`
 	RunTimeLower  int64  `json:"runTimeTicks"`
+	PlaySessionID string `json:"PlaySessionId"`
+	PlaySession   string `json:"playSessionId"`
 }
 
 func embyPlayingProgressHandler(svc *service.Container) gin.HandlerFunc {
@@ -48,6 +50,11 @@ func embyPlayingProgressHandler(svc *service.Container) gin.HandlerFunc {
 		if runTime == 0 {
 			runTime, _ = strconv.ParseInt(firstQueryValue(c, "RunTimeTicks", "runTimeTicks"), 10, 64)
 		}
+		playSessionID := embyFirstNonEmptyString(
+			req.PlaySessionID,
+			req.PlaySession,
+			firstQueryValue(c, "PlaySessionId", "playSessionId"),
+		)
 		if itemID == "" {
 			c.Status(http.StatusOK)
 			return
@@ -57,7 +64,7 @@ func embyPlayingProgressHandler(svc *service.Container) gin.HandlerFunc {
 			c.Status(http.StatusUnauthorized)
 			return
 		}
-		if err := svc.Emby.RecordProgress(c.Request.Context(), uid, itemID, pos, runTime); err != nil {
+		if err := svc.Emby.RecordProgressWithSession(c.Request.Context(), uid, itemID, pos, runTime, playSessionID); err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return
 		}

internal/handler/media.go

@@ -8,6 +8,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/gin-gonic/gin"
 
@@ -60,37 +61,37 @@ func listLibrariesHandler(svc *service.Container) gin.HandlerFunc {
 		}
 		role, _ := c.Get(middleware.CtxUserRole)
 		includeHidden := role == "admin" && (c.Query("include_hidden") == "1" || c.Query("include_hidden") == "true" || c.Query("all") == "1")
-			if !includeHidden {
-				libs = service.FilterDisplayCloudLibraries(ctx, svc.Repo, libs)
-				visibility := mediaVisibilityForRequest(c, svc)
-				filtered := libs[:0]
-				for _, lib := range libs {
-					if service.LibraryVisibleForUser(ctx, svc.Repo, lib, visibility) {
-						filtered = append(filtered, lib)
-					}
-				}
-				libs = filtered
-			}
-			rawIDs := strings.TrimSpace(c.Query("ids"))
-			var targetSet map[string]struct{}
-			if rawIDs != "" {
-				targetSet = make(map[string]struct{})
-				for _, id := range strings.Split(rawIDs, ",") {
-					id = strings.TrimSpace(id)
-					if id != "" {
-						targetSet[id] = struct{}{}
-					}
+		if !includeHidden {
+			libs = service.FilterDisplayCloudLibraries(ctx, svc.Repo, libs)
+			visibility := mediaVisibilityForRequest(c, svc)
+			filtered := libs[:0]
+			for _, lib := range libs {
+				if service.LibraryVisibleForUser(ctx, svc.Repo, lib, visibility) {
+					filtered = append(filtered, lib)
 				}
 			}
-			if len(targetSet) > 0 {
-				filtered := libs[:0]
-				for _, lib := range libs {
-					if _, ok := targetSet[lib.ID]; ok {
-						filtered = append(filtered, lib)
-					}
+			libs = filtered
+		}
+		rawIDs := strings.TrimSpace(c.Query("ids"))
+		var targetSet map[string]struct{}
+		if rawIDs != "" {
+			targetSet = make(map[string]struct{})
+			for _, id := range strings.Split(rawIDs, ",") {
+				id = strings.TrimSpace(id)
+				if id != "" {
+					targetSet[id] = struct{}{}
 				}
-				libs = filtered
 			}
+		}
+		if len(targetSet) > 0 {
+			filtered := libs[:0]
+			for _, lib := range libs {
+				if _, ok := targetSet[lib.ID]; ok {
+					filtered = append(filtered, lib)
+				}
+			}
+			libs = filtered
+		}
 		withPreview := c.Query("with_preview") == "1" || c.Query("with_preview") == "true"
 		limit := 10
 		if withPreview {
@@ -103,7 +104,12 @@ func listLibrariesHandler(svc *service.Container) gin.HandlerFunc {
 		}
 		out := make([]webLibraryPayload, 0, len(libs)+8)
 		if withPreview {
-			previews, err := svc.Media.ListLibrariesWithPreview(ctx, libs, mediaVisibilityForRequest(c, svc), limit)
+			var previews []service.LibraryPreviewItem
+			if c.Query("include_total") == "0" {
+				previews, err = svc.Media.ListLibraryPreviews(ctx, libs, mediaVisibilityForRequest(c, svc), limit)
+			} else {
+				previews, err = svc.Media.ListLibrariesWithPreview(ctx, libs, mediaVisibilityForRequest(c, svc), limit)
+			}
 			if err != nil {
 				c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 				return
@@ -111,41 +117,55 @@ func listLibrariesHandler(svc *service.Container) gin.HandlerFunc {
 			for _, p := range previews {
 				out = append(out, webLibraryPayload{Library: p.Library, Total: p.Total, Cards: p.Cards})
 			}
-			} else {
-				visibility := mediaVisibilityForRequest(c, svc)
-				libIDs := make([]string, len(libs))
-				for i, l := range libs {
-					libIDs[i] = l.ID
+		} else {
+			visibility := mediaVisibilityForRequest(c, svc)
+			libIDs := make([]string, len(libs))
+			for i, l := range libs {
+				libIDs[i] = l.ID
+			}
+			counts, _ := svc.Repo.Media.CountByLibraries(ctx, libIDs, repository.MediaQueryFilter{
+				IncludeNSFW:       visibility.IncludeNSFW,
+				AllowedLibraryIDs: visibility.AllowedLibraryIDs,
+				HiddenLibraryIDs:  visibility.HiddenLibraryIDs,
+			})
+			for _, l := range libs {
+				var total int64
+				if counts != nil {
+					total = counts[l.ID]
 				}
-				counts, _ := svc.Repo.Media.CountByLibraries(ctx, libIDs, repository.MediaQueryFilter{
-					IncludeNSFW:       visibility.IncludeNSFW,
-					AllowedLibraryIDs: visibility.AllowedLibraryIDs,
-					HiddenLibraryIDs:  visibility.HiddenLibraryIDs,
-				})
-				for _, l := range libs {
-					var total int64
-					if counts != nil {
-						total = counts[l.ID]
-					}
-					out = append(out, webLibraryPayload{Library: l, Total: total})
+				out = append(out, webLibraryPayload{Library: l, Total: total})
+			}
+		}
+		// 精确指定目标库时，如果目标全是本地库，就不必枚举远程挂载。
+		// 首页预览会拆成多个小批次请求，跳过无关远程调用可以明显缩短
+		// 每批次的尾延迟；未指定 ids 的完整库列表仍保持原行为。
+		includeRemote := true
+		if len(targetSet) > 0 {
+			includeRemote = false
+			for id := range targetSet {
+				if service.IsEmbyRemoteID(id) {
+					includeRemote = true
+					break
 				}
 			}
+		}
+
 		// 远程 Emby 挂载库追加在本地库之后（非管理员视图仍受 allowed_library_ids 约束）。
-		if svc.EmbyRemote != nil {
+		if includeRemote && svc.EmbyRemote != nil {
 			if views, err := svc.EmbyRemote.RemoteLibraries(ctx); err == nil {
-					visibility := mediaVisibilityForRequest(c, svc)
-					allowedViews := make([]service.RemoteLibraryView, 0, len(views))
-					for _, v := range views {
-						if !includeHidden && !service.LibraryVisibleForUser(ctx, svc.Repo, v.Library, visibility) {
+				visibility := mediaVisibilityForRequest(c, svc)
+				allowedViews := make([]service.RemoteLibraryView, 0, len(views))
+				for _, v := range views {
+					if !includeHidden && !service.LibraryVisibleForUser(ctx, svc.Repo, v.Library, visibility) {
+						continue
+					}
+					if len(targetSet) > 0 {
+						if _, ok := targetSet[v.Library.ID]; !ok {
 							continue
 						}
-						if len(targetSet) > 0 {
-							if _, ok := targetSet[v.Library.ID]; !ok {
-								continue
-							}
-						}
-						allowedViews = append(allowedViews, v)
 					}
+					allowedViews = append(allowedViews, v)
+				}
 				remotePayloads := make([]webLibraryPayload, len(allowedViews))
 				for i, v := range allowedViews {
 					remotePayloads[i] = webLibraryPayload{Library: v.Library, IsRemoteEmby: true, RemoteSource: v.AccountName}
@@ -170,13 +190,13 @@ func listLibrariesHandler(svc *service.Container) gin.HandlerFunc {
 								if acct == nil {
 									return
 								}
-									tmpMount := &model.EmbyMount{
-										Base:           model.Base{ID: v.MountID},
-										AccountID:      v.AccountID,
-										RemoteViewID:   v.RemoteID,
-										CollectionType: v.CollectionType,
-										Name:           v.Library.Name,
-									}
+								tmpMount := &model.EmbyMount{
+									Base:           model.Base{ID: v.MountID},
+									AccountID:      v.AccountID,
+									RemoteViewID:   v.RemoteID,
+									CollectionType: v.CollectionType,
+									Name:           v.Library.Name,
+								}
 								itemTypes := remoteLibraryItemTypes(v.CollectionType)
 								if _, total, err := svc.EmbyRemote.RemoteLibraryMedia(ctx, tmpMount, acct, v.RemoteID, itemTypes, 0, 1); err == nil {
 									remotePayloads[i].Total = total
@@ -421,9 +441,14 @@ func listMediaHandler(svc *service.Container) gin.HandlerFunc {
 			})
 			return
 		}
+		sortSpec := parseMediaSort(c)
+		var history map[string]time.Time
+		if sortSpec.Field == "last_played" {
+			history = mediaHistoryMap(c, svc)
+		}
 		groupVersions := c.DefaultQuery("group_versions", "1") != "0"
 		if !groupVersions {
-			items, total, err := svc.Media.ListMediaVisible(c.Request.Context(), id, page, size, mediaVisibilityForRequest(c, svc))
+			items, total, err := svc.Media.ListMediaVisible(ctx, id, page, size, mediaVisibilityForRequest(c, svc))
 			if err != nil {
 				writeInternalOrCanceled(c, err)
 				return
@@ -439,17 +464,19 @@ func listMediaHandler(svc *service.Container) gin.HandlerFunc {
 			})
 			return
 		}
-		items, total, err := svc.Media.ListMediaVisibleGrouped(c.Request.Context(), id, page, size, mediaVisibilityForRequest(c, svc))
+		grouped, err := svc.Media.GroupedMediaVisible(ctx, id, mediaVisibilityForRequest(c, svc))
 		if err != nil {
 			writeInternalOrCanceled(c, err)
 			return
 		}
+		grouped = service.SortMediaItems(grouped, sortSpec.Field, sortSpec.Order, history)
+		items := service.PaginateMediaItems(grouped, page, size)
 		if items == nil {
 			items = []service.MediaItem{}
 		}
 		c.JSON(http.StatusOK, gin.H{
 			"items":     items,
-			"total":     total,
+			"total":     len(grouped),
 			"page":      page,
 			"page_size": size,
 		})
@@ -699,25 +726,25 @@ func streamHandler(svc *service.Container) gin.HandlerFunc {
 				}
 				return
 			}
-				target, err := svc.EmbyRemote.WebStreamURL(ctx, acct, remoteID)
-				if err != nil {
-					c.JSON(http.StatusBadGateway, gin.H{"error": err.Error()})
-					return
-				}
-				// 现代浏览器在 HTTPS 页面中请求不安全源（HTTP 视频流）会直接报 Mixed Content 拦截导致播放失败。
-				// 仅当当前前端请求为 HTTPS 且远程直连目标为 HTTP 时，自动降级通过本机反向代理传输流，避免播放被浏览器阻断；
-				// 其它场景（HTTP 页面访问 HTTP/HTTPS，或 HTTPS 访问 HTTPS）继续 302 直连，最大化节省服务器带宽与流量。
-				if requestIsHTTPS(c) && strings.HasPrefix(strings.ToLower(target), "http://") {
-					if err := svc.Emby.ProxyRemoteVideoStream(ctx, c.Writer, c.Request, mountID, remoteID); err != nil {
-						if !c.Writer.Written() {
-							c.JSON(http.StatusBadGateway, gin.H{"error": err.Error()})
-						}
-					}
-					return
-				}
-				setRedirectNoStoreHeaders(c)
-				c.Redirect(http.StatusFound, target)
+			target, err := svc.EmbyRemote.WebStreamURL(ctx, acct, remoteID)
+			if err != nil {
+				c.JSON(http.StatusBadGateway, gin.H{"error": err.Error()})
 				return
+			}
+			// 现代浏览器在 HTTPS 页面中请求不安全源（HTTP 视频流）会直接报 Mixed Content 拦截导致播放失败。
+			// 仅当当前前端请求为 HTTPS 且远程直连目标为 HTTP 时，自动降级通过本机反向代理传输流，避免播放被浏览器阻断；
+			// 其它场景（HTTP 页面访问 HTTP/HTTPS，或 HTTPS 访问 HTTPS）继续 302 直连，最大化节省服务器带宽与流量。
+			if requestIsHTTPS(c) && strings.HasPrefix(strings.ToLower(target), "http://") {
+				if err := svc.Emby.ProxyRemoteVideoStream(ctx, c.Writer, c.Request, mountID, remoteID); err != nil {
+					if !c.Writer.Written() {
+						c.JSON(http.StatusBadGateway, gin.H{"error": err.Error()})
+					}
+				}
+				return
+			}
+			setRedirectNoStoreHeaders(c)
+			c.Redirect(http.StatusFound, target)
+			return
 		}
 		m, err := svc.Media.GetMedia(ctx, id)
 		if err != nil || m == nil || !mediaVisibleForRequest(c, svc, m) {

internal/handler/media_sort.go

@@ -0,0 +1,50 @@
+package handler
+
+import (
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/truewhile/MeBox/internal/middleware"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/service"
+)
+
+func parseMediaSort(c *gin.Context) service.MediaSortSpec {
+	if c == nil {
+		return service.NormalizeMediaSort("", "")
+	}
+	return service.NormalizeMediaSort(c.Query("sort"), c.Query("order"))
+}
+
+// mediaHistoryMap loads the current user's latest playback time per media ID.
+// It is only used for the explicit last_played sort so normal pagination keeps
+// its single-query path.
+func mediaHistoryMap(c *gin.Context, svc *service.Container) map[string]time.Time {
+	if c == nil || svc == nil || svc.Repo == nil || svc.Repo.DB == nil {
+		return nil
+	}
+	uid, _ := c.Get(middleware.CtxUserID)
+	userID := strings.TrimSpace(toString(uid))
+	if userID == "" {
+		return nil
+	}
+	var rows []struct {
+		MediaID   string    `gorm:"column:media_id"`
+		WatchedAt time.Time `gorm:"column:watched_at"`
+	}
+	if err := svc.Repo.DB.WithContext(c.Request.Context()).
+		Model(&model.PlaybackHistory{}).
+		Select("media_id, MAX(watched_at) AS watched_at").
+		Where("user_id = ?", userID).
+		Group("media_id").
+		Scan(&rows).Error; err != nil {
+		return nil
+	}
+	out := make(map[string]time.Time, len(rows))
+	for _, row := range rows {
+		out[row.MediaID] = row.WatchedAt
+	}
+	return out
+}

internal/handler/playback.go

@@ -15,9 +15,12 @@ import (
 // ─── History ────────────────────────────────────────────────────────────────
 
 type progressReq struct {
-	MediaID    string `json:"media_id" binding:"required"`
-	PositionMs int64  `json:"position_ms"`
-	DurationMs int64  `json:"duration_ms"`
+	MediaID            string `json:"media_id" binding:"required"`
+	PositionMs         int64  `json:"position_ms"`
+	DurationMs         int64  `json:"duration_ms"`
+	SessionID          string `json:"session_id"`
+	SessionStartedAtMs int64  `json:"session_started_at_ms"`
+	Sequence           int64  `json:"sequence"`
 }
 
 func recordProgressHandler(svc *service.Container) gin.HandlerFunc {
@@ -28,9 +31,15 @@ func recordProgressHandler(svc *service.Container) gin.HandlerFunc {
 			return
 		}
 		uid, _ := c.Get(middleware.CtxUserID)
-		if err := svc.Playback.RecordProgress(
-			c.Request.Context(), uid.(string), req.MediaID, req.PositionMs, req.DurationMs,
-		); err != nil {
+		if err := svc.Playback.RecordProgressUpdate(c.Request.Context(), service.ProgressUpdate{
+			UserID:             toString(uid),
+			MediaID:            req.MediaID,
+			PositionMs:         req.PositionMs,
+			DurationMs:         req.DurationMs,
+			SessionID:          req.SessionID,
+			SessionStartedAtMs: req.SessionStartedAtMs,
+			Sequence:           req.Sequence,
+		}); err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return
 		}

internal/handler/playback_history_test.go

@@ -0,0 +1,65 @@
+package handler
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/glebarez/sqlite"
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+
+	"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 TestRecordProgressHandlerIgnoresStaleSessionSequence(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.AutoMigrate(&model.PlaybackHistory{}); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	svc := &service.Container{
+		Repo:     repos,
+		Playback: service.NewPlaybackService(zap.NewNop(), repos),
+	}
+
+	router := gin.New()
+	router.Use(func(c *gin.Context) {
+		c.Set(middleware.CtxUserID, "user-1")
+		c.Next()
+	})
+	router.POST("/history", recordProgressHandler(svc))
+
+	post := func(body string) int {
+		t.Helper()
+		req := httptest.NewRequest(http.MethodPost, "/history", strings.NewReader(body))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+		router.ServeHTTP(w, req)
+		return w.Code
+	}
+
+	if code := post(`{"media_id":"m-1","position_ms":90000,"duration_ms":120000,"session_id":"s-1","session_started_at_ms":1000,"sequence":2}`); code != http.StatusNoContent {
+		t.Fatalf("newer progress status = %d", code)
+	}
+	if code := post(`{"media_id":"m-1","position_ms":10000,"duration_ms":120000,"session_id":"s-1","session_started_at_ms":1000,"sequence":1}`); code != http.StatusNoContent {
+		t.Fatalf("stale progress status = %d", code)
+	}
+
+	var got model.PlaybackHistory
+	if err := db.Where("user_id = ? AND media_id = ?", "user-1", "m-1").First(&got).Error; err != nil {
+		t.Fatal(err)
+	}
+	if got.PositionMs != 90_000 || got.Sequence != 2 {
+		t.Fatalf("stale handler request overwrote newer state: %#v", got)
+	}
+}

internal/handler/series.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"sort"
 	"strconv"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
@@ -66,6 +67,11 @@ func listLibrarySeriesHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		libID := c.Param("id")
 		ctx := c.Request.Context()
+		sortSpec := parseMediaSort(c)
+		var history map[string]time.Time
+		if sortSpec.Field == "last_played" {
+			history = mediaHistoryMap(c, svc)
+		}
 		// 远程剧集库：远程 Series 映射为系列卡片。
 		if svc.EmbyRemote != nil && service.IsEmbyRemoteID(libID) {
 			mountID, remoteID, _ := service.DecodeEmbyRemoteID(libID)
@@ -83,6 +89,7 @@ func listLibrarySeriesHandler(svc *service.Container) gin.HandlerFunc {
 				writeInternalOrCanceled(c, err)
 				return
 			}
+			cards = service.SortSeriesCards(cards, sortSpec.Field, sortSpec.Order, history)
 			page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
 			size, _ := strconv.Atoi(c.DefaultQuery("page_size", "500"))
 			if page < 1 {
@@ -122,6 +129,7 @@ func listLibrarySeriesHandler(svc *service.Container) gin.HandlerFunc {
 			writeInternalOrCanceled(c, err)
 			return
 		}
+		items = service.SortSeriesCards(items, sortSpec.Field, sortSpec.Order, history)
 		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
 		size, _ := strconv.Atoi(c.DefaultQuery("page_size", "500"))
 		if page < 1 {

internal/middleware/emby_compat_logger.go

@@ -0,0 +1,284 @@
+package middleware
+
+import (
+	"net/http"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+)
+
+// EmbyCompatLogger 将 Emby/Jellyfin 兼容面的请求独立记录，便于针对具体
+// 客户端、设备和未实现接口排查兼容问题。
+//
+// isEmbyPath 由 handler 层提供，用于识别 /emby/* 以及无前缀根路径形式的
+// Emby API。除路径特征外，带 X-Emby-* / X-MediaBrowser-* 等客户端凭据的
+// 请求也会被识别，因此尚未实现且没有已知路径前缀的新接口也能被记录。
+func EmbyCompatLogger(log *zap.Logger, isEmbyPath func(string) bool) gin.HandlerFunc {
+	if log == nil {
+		return func(c *gin.Context) { c.Next() }
+	}
+	return func(c *gin.Context) {
+		if c == nil || c.Request == nil {
+			return
+		}
+
+		requestPath := c.Request.URL.Path
+		pathMatched := isEmbyPath != nil && isEmbyPath(requestPath)
+		hasSignature := hasEmbyClientSignature(c)
+		if !pathMatched && !hasSignature {
+			c.Next()
+			return
+		}
+
+		start := time.Now()
+		c.Next()
+
+		status := c.Writer.Status()
+		route := c.FullPath()
+		// 根路径 Emby 命名空间很宽，可能与 SPA 路由重名。没有客户端标识且
+		// 最终由 SPA 返回 200 时不应污染兼容日志；服务端路由或 404 仍记录。
+		if !hasSignature && !hasExplicitEmbyPrefix(requestPath) && strings.TrimSpace(route) == "" && status < http.StatusBadRequest {
+			return
+		}
+		unimplemented := isUnimplementedEmbyRequest(c, route, status, hasSignature)
+		fields := embyCompatLogFields(c, requestPath, status, route, time.Since(start), unimplemented)
+
+		switch {
+		case unimplemented:
+			log.Warn("emby API not implemented", fields...)
+		case status >= http.StatusBadRequest:
+			log.Warn("emby request failed", fields...)
+		default:
+			log.Info("emby request", fields...)
+		}
+	}
+}
+
+func isUnimplementedEmbyRequest(c *gin.Context, route string, status int, hasSignature bool) bool {
+	if strings.TrimSpace(route) != "" || c.Request.Method == http.MethodOptions {
+		return false
+	}
+	if status == http.StatusNotFound {
+		return true
+	}
+	// 无前端 API 前缀的未知 Emby 路径可能被 SPA 兜底为 200 HTML。
+	// 已识别为 Emby 客户端的这类响应同样说明兼容接口尚未实现。
+	return hasSignature && status >= http.StatusOK && status < http.StatusMultipleChoices &&
+		strings.Contains(strings.ToLower(c.Writer.Header().Get("Content-Type")), "text/html")
+}
+
+func embyCompatLogFields(c *gin.Context, requestPath string, status int, route string, duration time.Duration, unimplemented bool) []zap.Field {
+	client := embyCompatClientInfo(c)
+	fields := []zap.Field{
+		zap.String("method", c.Request.Method),
+		zap.String("path", requestPath),
+		zap.String("normalized_path", c.Request.URL.Path),
+		zap.String("route", route),
+		zap.Int("status", status),
+		zap.Duration("duration", duration),
+		zap.String("ip", c.ClientIP()),
+		zap.Bool("unimplemented", unimplemented),
+	}
+	if queryKeys := sortedQueryKeys(c); len(queryKeys) > 0 {
+		fields = append(fields, zap.Strings("query_keys", queryKeys))
+	}
+	if client.Client != "" {
+		fields = append(fields, zap.String("client", client.Client))
+	}
+	if client.Device != "" {
+		fields = append(fields, zap.String("device", client.Device))
+	}
+	if client.DeviceID != "" {
+		fields = append(fields, zap.String("device_id", client.DeviceID))
+	}
+	if client.Version != "" {
+		fields = append(fields, zap.String("client_version", client.Version))
+	}
+	if client.UserID != "" {
+		fields = append(fields, zap.String("user_id", client.UserID))
+	}
+	if userAgent := strings.TrimSpace(c.GetHeader("User-Agent")); userAgent != "" {
+		fields = append(fields, zap.String("user_agent", userAgent))
+	}
+	if contentType := strings.TrimSpace(c.GetHeader("Content-Type")); contentType != "" {
+		fields = append(fields, zap.String("content_type", contentType))
+	}
+	if errs := c.Errors.Errors(); len(errs) > 0 {
+		fields = append(fields, zap.Strings("errors", truncateStrings(errs, 8, 512)))
+	}
+	return fields
+}
+
+func hasEmbyClientSignature(c *gin.Context) bool {
+	for _, name := range []string{
+		"X-Emby-Token",
+		"X-MediaBrowser-Token",
+		"X-Emby-Authorization",
+		"X-MediaBrowser-Authorization",
+		"X-Emby-Client",
+		"X-MediaBrowser-Client",
+		"X-Emby-Device-Id",
+		"X-Emby-DeviceId",
+		"X-Emby-Device-Name",
+		"X-Emby-Version",
+		"X-Emby-UserId",
+		"X-MediaBrowser-Device-Id",
+		"X-MediaBrowser-DeviceId",
+		"X-MediaBrowser-Device-Name",
+		"X-MediaBrowser-Version",
+		"X-MediaBrowser-UserId",
+	} {
+		if strings.TrimSpace(c.GetHeader(name)) != "" {
+			return true
+		}
+	}
+
+	auth := strings.ToLower(strings.TrimSpace(c.GetHeader("Authorization")))
+	if strings.HasPrefix(auth, "emby ") || strings.HasPrefix(auth, "mediabrowser ") {
+		return true
+	}
+
+	for _, key := range []string{"X-Emby-Token", "X-MediaBrowser-Token"} {
+		if strings.TrimSpace(c.Query(key)) != "" {
+			return true
+		}
+	}
+
+	ua := strings.ToLower(strings.TrimSpace(c.GetHeader("User-Agent")))
+	for _, marker := range []string{
+		"emby", "jellyfin", "infuse", "senplayer", "fileball", "vidhub", "hills", "rodelplayer",
+	} {
+		if strings.Contains(ua, marker) {
+			return true
+		}
+	}
+	return false
+}
+
+type embyCompatClient struct {
+	Client   string
+	Device   string
+	DeviceID string
+	Version  string
+	UserID   string
+}
+
+func embyCompatClientInfo(c *gin.Context) embyCompatClient {
+	auth := parseEmbyCompatAuthorization(firstNonEmptyString(
+		c.GetHeader("X-Emby-Authorization"),
+		c.GetHeader("X-MediaBrowser-Authorization"),
+		c.GetHeader("Authorization"),
+	))
+	return embyCompatClient{
+		Client: firstNonEmptyString(
+			c.GetHeader("X-Emby-Client"),
+			c.GetHeader("X-MediaBrowser-Client"),
+			c.Query("Client"),
+			c.Query("client"),
+			c.Query("X-Emby-Client"),
+			auth["client"],
+		),
+		Device: firstNonEmptyString(
+			c.GetHeader("X-Emby-Device-Name"),
+			c.GetHeader("X-MediaBrowser-Device-Name"),
+			c.Query("Device"),
+			c.Query("DeviceName"),
+			c.Query("device"),
+			c.Query("deviceName"),
+			auth["device"],
+		),
+		DeviceID: firstNonEmptyString(
+			c.GetHeader("X-Emby-Device-Id"),
+			c.GetHeader("X-Emby-DeviceId"),
+			c.GetHeader("X-MediaBrowser-Device-Id"),
+			c.GetHeader("X-MediaBrowser-DeviceId"),
+			c.Query("DeviceId"),
+			c.Query("DeviceID"),
+			c.Query("deviceId"),
+			c.Query("deviceID"),
+			auth["deviceid"],
+		),
+		Version: firstNonEmptyString(
+			c.GetHeader("X-Emby-Version"),
+			c.GetHeader("X-MediaBrowser-Version"),
+			c.Query("Version"),
+			c.Query("version"),
+			auth["version"],
+		),
+		UserID: firstNonEmptyString(
+			c.Query("UserId"),
+			c.Query("userId"),
+			auth["userid"],
+		),
+	}
+}
+
+func parseEmbyCompatAuthorization(raw string) map[string]string {
+	out := map[string]string{}
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return out
+	}
+	if len(raw) >= len("MediaBrowser ") && strings.EqualFold(raw[:len("MediaBrowser ")], "MediaBrowser ") {
+		raw = raw[len("MediaBrowser "):]
+	} else if len(raw) >= len("Emby ") && strings.EqualFold(raw[:len("Emby ")], "Emby ") {
+		raw = raw[len("Emby "):]
+	}
+	for _, part := range strings.Split(raw, ",") {
+		part = strings.TrimSpace(part)
+		if part == "" {
+			continue
+		}
+		key, value, ok := strings.Cut(part, "=")
+		if !ok {
+			continue
+		}
+		key = strings.ToLower(strings.TrimSpace(key))
+		value = strings.Trim(strings.TrimSpace(value), `"`)
+		if key != "" && value != "" {
+			out[key] = value
+		}
+	}
+	return out
+}
+
+func firstNonEmptyString(values ...string) string {
+	for _, value := range values {
+		if value = strings.TrimSpace(value); value != "" {
+			return value
+		}
+	}
+	return ""
+}
+
+func sortedQueryKeys(c *gin.Context) []string {
+	query := c.Request.URL.Query()
+	keys := make([]string, 0, len(query))
+	for key := range query {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	return keys
+}
+
+func truncateStrings(values []string, maxItems, maxLen int) []string {
+	if len(values) > maxItems {
+		values = values[:maxItems]
+	}
+	out := make([]string, 0, len(values))
+	for _, value := range values {
+		if len(value) > maxLen {
+			value = value[:maxLen] + "..."
+		}
+		out = append(out, value)
+	}
+	return out
+}
+
+func hasExplicitEmbyPrefix(path string) bool {
+	lower := strings.ToLower(strings.TrimSpace(path))
+	return lower == "/emby" || strings.HasPrefix(lower, "/emby/")
+}

internal/middleware/emby_compat_logger_test.go

@@ -0,0 +1,124 @@
+package middleware
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zaptest/observer"
+)
+
+func TestEmbyCompatLoggerRecordsClientAndUnimplementedRequest(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	core, logs := observer.New(zap.InfoLevel)
+	router := gin.New()
+	router.Use(EmbyCompatLogger(zap.New(core), func(path string) bool {
+		return strings.HasPrefix(path, "/emby/") || strings.HasPrefix(path, "/System/")
+	}))
+	router.GET("/emby/System/Info/Public", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{"ServerName": "MeBox"})
+	})
+	router.NoRoute(func(c *gin.Context) {
+		c.Status(http.StatusNotFound)
+	})
+
+	successReq := httptest.NewRequest(http.MethodGet, "/emby/System/Info/Public?api_key=do-not-log", nil)
+	successReq.Header.Set("X-Emby-Authorization", `MediaBrowser Client="Infuse", Device="Apple TV", DeviceId="device-1", Version="8.2", UserId="user-1", Token="secret-token"`)
+	successResp := httptest.NewRecorder()
+	router.ServeHTTP(successResp, successReq)
+	if successResp.Code != http.StatusOK {
+		t.Fatalf("success status = %d, want 200", successResp.Code)
+	}
+
+	missingReq := httptest.NewRequest(http.MethodPost, "/Search/Hints", nil)
+	missingReq.Header.Set("X-Emby-Token", "secret-token")
+	missingResp := httptest.NewRecorder()
+	router.ServeHTTP(missingResp, missingReq)
+	if missingResp.Code != http.StatusNotFound {
+		t.Fatalf("missing status = %d, want 404", missingResp.Code)
+	}
+
+	entries := logs.All()
+	if len(entries) != 2 {
+		t.Fatalf("logged entries = %d, want 2: %#v", len(entries), entries)
+	}
+
+	success := entries[0].ContextMap()
+	if success["path"] != "/emby/System/Info/Public" {
+		t.Fatalf("success path = %#v", success["path"])
+	}
+	if success["client"] != "Infuse" || success["device"] != "Apple TV" || success["device_id"] != "device-1" {
+		t.Fatalf("client fields not parsed: %#v", success)
+	}
+	if success["unimplemented"] != false {
+		t.Fatalf("success unimplemented = %#v, want false", success["unimplemented"])
+	}
+	if _, ok := success["token"]; ok {
+		t.Fatalf("token must not be logged: %#v", success)
+	}
+	if success["query_keys"] == nil {
+		t.Fatalf("query_keys missing: %#v", success)
+	}
+	if strings.Contains(entries[0].Message, "secret-token") {
+		t.Fatalf("token leaked in message: %q", entries[0].Message)
+	}
+
+	missing := entries[1].ContextMap()
+	if entries[1].Message != "emby API not implemented" {
+		t.Fatalf("missing message = %q", entries[1].Message)
+	}
+	if missing["path"] != "/Search/Hints" || missing["unimplemented"] != true {
+		t.Fatalf("missing fields = %#v", missing)
+	}
+	if missing["method"] != http.MethodPost {
+		t.Fatalf("missing method = %#v", missing["method"])
+	}
+}
+
+func TestEmbyCompatLoggerSkipsUnrelatedRequests(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	core, logs := observer.New(zap.InfoLevel)
+	router := gin.New()
+	router.Use(EmbyCompatLogger(zap.New(core), func(string) bool { return false }))
+	router.GET("/api/health", func(c *gin.Context) {
+		c.Status(http.StatusOK)
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/health", nil)
+	req.Header.Set("Authorization", "Bearer regular-token")
+	resp := httptest.NewRecorder()
+	router.ServeHTTP(resp, req)
+
+	if logs.Len() != 0 {
+		t.Fatalf("unrelated request should not be logged: %#v", logs.All())
+	}
+}
+
+func TestEmbyCompatLoggerMarksSPAFallbackAsUnimplemented(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	core, logs := observer.New(zap.InfoLevel)
+	router := gin.New()
+	router.Use(EmbyCompatLogger(zap.New(core), func(string) bool { return false }))
+	router.NoRoute(func(c *gin.Context) {
+		c.Data(http.StatusOK, "text/html; charset=utf-8", []byte("<html></html>"))
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/NewEmbyFeature/Test", nil)
+	req.Header.Set("X-Emby-Token", "secret-token")
+	resp := httptest.NewRecorder()
+	router.ServeHTTP(resp, req)
+
+	entries := logs.All()
+	if len(entries) != 1 {
+		t.Fatalf("logged entries = %d, want 1", len(entries))
+	}
+	if entries[0].Message != "emby API not implemented" {
+		t.Fatalf("message = %q, want unimplemented warning", entries[0].Message)
+	}
+	if entries[0].ContextMap()["unimplemented"] != true {
+		t.Fatalf("unimplemented field missing: %#v", entries[0].ContextMap())
+	}
+}

internal/model/playback_collection.go

@@ -13,6 +13,12 @@ type PlaybackHistory struct {
 	DurationMs int64     `json:"duration_ms"`
 	WatchedAt  time.Time `json:"watched_at"`
 	Completed  bool      `json:"completed"`
+
+	// 播放会话信息用于丢弃乱序到达的旧进度，避免旧请求把新的续播状态覆盖。
+	// 旧客户端不提供这些字段时保持 0，继续沿用无条件 upsert 语义。
+	SessionID          string `gorm:"size:128;index" json:"-"`
+	SessionStartedAtMs int64  `gorm:"not null;default:0" json:"-"`
+	Sequence           int64  `gorm:"not null;default:0" json:"-"`
 }
 
 // Favorite 将媒体项标记为给定用户的收藏。

internal/repository/history_repository.go

@@ -2,6 +2,7 @@ package repository
 
 import (
 	"context"
+	"strings"
 
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
@@ -13,24 +14,72 @@ import (
 // upserts on (UserID, MediaID) so resume always reads the latest position.
 type HistoryRepository struct{ db *gorm.DB }
 
-// Upsert atomically inserts/updates the resume position in a single statement,
-// relying on the uniq_user_history composite unique index. Concurrent progress
-// reports for the same (user, media) can no longer double-insert.
+// Upsert atomically inserts/updates the resume position in a single statement.
+// Callers without playback-session metadata keep the legacy last-write-wins
+// semantics (for example an explicit "mark played" action).
 func (r *HistoryRepository) Upsert(ctx context.Context, h *model.PlaybackHistory) error {
-	return r.db.WithContext(ctx).Clauses(clause.OnConflict{
-		Columns: []clause.Column{{Name: "user_id"}, {Name: "media_id"}},
-		DoUpdates: clause.Assignments(map[string]any{
-			"position_ms": h.PositionMs,
-			// 沿用旧语义：未知时长（0）不覆盖已记录的时长。
-			"duration_ms": gorm.Expr(
-				"CASE WHEN ? > 0 THEN ? ELSE playback_histories.duration_ms END",
-				h.DurationMs, h.DurationMs,
+	return r.upsert(ctx, h, false)
+}
+
+// UpsertProgress writes a progress report only when it is newer than the row
+// currently stored. Reports from an older playback session, or an older
+// sequence in the same session, are ignored. Reports without session metadata
+// fall back to Upsert for compatibility with older clients.
+func (r *HistoryRepository) UpsertProgress(ctx context.Context, h *model.PlaybackHistory) error {
+	h.SessionID = strings.TrimSpace(h.SessionID)
+	if h.SessionID == "" || h.SessionStartedAtMs <= 0 {
+		return r.Upsert(ctx, h)
+	}
+	return r.upsert(ctx, h, true)
+}
+
+func (r *HistoryRepository) upsert(ctx context.Context, h *model.PlaybackHistory, versioned bool) error {
+	updates := playbackHistoryAssignments(h)
+	if versioned {
+		updates["session_id"] = h.SessionID
+		updates["session_started_at_ms"] = h.SessionStartedAtMs
+		updates["sequence"] = h.Sequence
+	}
+
+	onConflict := clause.OnConflict{
+		Columns:   []clause.Column{{Name: "user_id"}, {Name: "media_id"}},
+		DoUpdates: clause.Assignments(updates),
+	}
+	if versioned {
+		onConflict.Where = clause.Where{Exprs: []clause.Expression{
+			clause.Or(
+				clause.Lt{
+					Column: clause.Column{Name: "session_started_at_ms"},
+					Value:  h.SessionStartedAtMs,
+				},
+				clause.And(
+					clause.Eq{
+						Column: clause.Column{Name: "session_started_at_ms"},
+						Value:  h.SessionStartedAtMs,
+					},
+					clause.Lte{
+						Column: clause.Column{Name: "sequence"},
+						Value:  h.Sequence,
+					},
+				),
 			),
-			"watched_at": h.WatchedAt,
-			"completed":  h.Completed,
-			"deleted_at": nil,
-		}),
-	}).Create(h).Error
+		}}
+	}
+	return r.db.WithContext(ctx).Clauses(onConflict).Create(h).Error
+}
+
+func playbackHistoryAssignments(h *model.PlaybackHistory) map[string]any {
+	return map[string]any{
+		"position_ms": h.PositionMs,
+		// 沿用旧语义：未知时长（0）不覆盖已记录的时长。
+		"duration_ms": gorm.Expr(
+			"CASE WHEN ? > 0 THEN ? ELSE playback_histories.duration_ms END",
+			h.DurationMs, h.DurationMs,
+		),
+		"watched_at": h.WatchedAt,
+		"completed":  h.Completed,
+		"deleted_at": nil,
+	}
 }
 
 // ListByUser returns the most recent history rows for the user.

internal/repository/history_repository_test.go

@@ -77,3 +77,105 @@ func TestHistoryUpsertKeepsDurationWhenUnknown(t *testing.T) {
 		t.Fatalf("duration_ms=0 upsert must not clear stored duration, got %d", got.DurationMs)
 	}
 }
+
+func TestHistoryUpsertProgressRejectsStaleReports(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := database.AutoMigrate(db); err != nil {
+		t.Fatalf("migrate: %v", err)
+	}
+	repos := New(db)
+	ctx := t.Context()
+	watched := time.Now()
+
+	first := &model.PlaybackHistory{
+		UserID:             "u-1",
+		MediaID:            "m-1",
+		PositionMs:         30_000,
+		DurationMs:         120_000,
+		WatchedAt:          watched,
+		SessionID:          "session-1",
+		SessionStartedAtMs: 1_000,
+		Sequence:           1,
+	}
+	if err := repos.History.UpsertProgress(ctx, first); err != nil {
+		t.Fatalf("first progress: %v", err)
+	}
+	newer := &model.PlaybackHistory{
+		UserID:             "u-1",
+		MediaID:            "m-1",
+		PositionMs:         90_000,
+		DurationMs:         120_000,
+		WatchedAt:          watched.Add(time.Minute),
+		Completed:          true,
+		SessionID:          "session-1",
+		SessionStartedAtMs: 1_000,
+		Sequence:           2,
+	}
+	if err := repos.History.UpsertProgress(ctx, newer); err != nil {
+		t.Fatalf("newer progress: %v", err)
+	}
+
+	stale := &model.PlaybackHistory{
+		UserID:             "u-1",
+		MediaID:            "m-1",
+		PositionMs:         10_000,
+		DurationMs:         120_000,
+		WatchedAt:          watched.Add(2 * time.Minute),
+		SessionID:          "session-1",
+		SessionStartedAtMs: 1_000,
+		Sequence:           1,
+	}
+	if err := repos.History.UpsertProgress(ctx, stale); err != nil {
+		t.Fatalf("stale progress: %v", err)
+	}
+	var got model.PlaybackHistory
+	if err := db.Where("user_id = ? AND media_id = ?", "u-1", "m-1").First(&got).Error; err != nil {
+		t.Fatal(err)
+	}
+	if got.PositionMs != 90_000 || !got.Completed || got.Sequence != 2 {
+		t.Fatalf("stale report overwrote newer state: %#v", got)
+	}
+
+	oldSession := &model.PlaybackHistory{
+		UserID:             "u-1",
+		MediaID:            "m-1",
+		PositionMs:         5_000,
+		DurationMs:         120_000,
+		WatchedAt:          watched.Add(3 * time.Minute),
+		SessionID:          "session-0",
+		SessionStartedAtMs: 500,
+		Sequence:           99,
+	}
+	if err := repos.History.UpsertProgress(ctx, oldSession); err != nil {
+		t.Fatalf("old session progress: %v", err)
+	}
+	if err := db.Where("user_id = ? AND media_id = ?", "u-1", "m-1").First(&got).Error; err != nil {
+		t.Fatal(err)
+	}
+	if got.PositionMs != 90_000 || !got.Completed {
+		t.Fatalf("old session overwrote newer state: %#v", got)
+	}
+
+	restart := &model.PlaybackHistory{
+		UserID:             "u-1",
+		MediaID:            "m-1",
+		PositionMs:         1_000,
+		DurationMs:         120_000,
+		WatchedAt:          watched.Add(4 * time.Minute),
+		SessionID:          "session-2",
+		SessionStartedAtMs: 2_000,
+		Sequence:           1,
+	}
+	if err := repos.History.UpsertProgress(ctx, restart); err != nil {
+		t.Fatalf("restart progress: %v", err)
+	}
+	if err := db.Where("user_id = ? AND media_id = ?", "u-1", "m-1").First(&got).Error; err != nil {
+		t.Fatal(err)
+	}
+	if got.PositionMs != 1_000 || got.Completed || got.SessionID != "session-2" {
+		t.Fatalf("new playback session did not reset state: %#v", got)
+	}
+}

internal/repository/media_repository.go

@@ -100,6 +100,26 @@ func (r *MediaRepository) ListByLibrariesFilteredNoCount(ctx context.Context, li
 	return items, err
 }
 
+// ListAllByLibrariesFilteredNoCount loads every matching row without issuing a
+// COUNT query. Full-library consumers such as series grouping must scan the
+// whole library anyway, so calling it once is both cheaper and more consistent
+// than issuing paginated queries with repeated counts.
+func (r *MediaRepository) ListAllByLibrariesFilteredNoCount(ctx context.Context, libraryIDs []string, filter MediaQueryFilter) ([]model.Media, error) {
+	items := make([]model.Media, 0)
+	if len(libraryIDs) == 0 {
+		return items, nil
+	}
+	q := r.db.WithContext(ctx).Model(&model.Media{})
+	if len(libraryIDs) == 1 {
+		q = q.Where("library_id = ?", libraryIDs[0])
+	} else {
+		q = q.Where("library_id IN ?", libraryIDs)
+	}
+	q = applyMediaQueryFilter(q, filter)
+	err := q.Order("release_date DESC, year DESC, updated_at DESC, created_at DESC, id DESC").Find(&items).Error
+	return items, err
+}
+
 func (r *MediaRepository) listByLibrariesFiltered(ctx context.Context, libraryIDs []string, offset, limit int, filter MediaQueryFilter, withCount bool) ([]model.Media, int64, error) {
 	var items []model.Media
 	var total int64

internal/service/emby_playback.go

@@ -37,7 +37,7 @@ func (e *EmbyService) PlaybackInfo(ctx context.Context, mediaID, userID string)
 		if err := e.mergeRemoteUserData(ctx, userID, out); err != nil {
 			return nil, err
 		}
-		out["PlaySessionId"] = fmt.Sprintf("remote-%s-%d", mountID, time.Now().Unix())
+		out["PlaySessionId"] = fmt.Sprintf("remote-%s-%d", mountID, time.Now().UnixMilli())
 		return out, nil
 	}
 	m, err := e.playableMedia(ctx, mediaID, userID)
@@ -46,7 +46,7 @@ func (e *EmbyService) PlaybackInfo(ctx context.Context, mediaID, userID string)
 	}
 	return map[string]any{
 		"MediaSources":  e.mediaSourcesForItem(ctx, m, false, e.directPlayOnly(ctx)),
-		"PlaySessionId": fmt.Sprintf("%s-%d", m.ID, time.Now().Unix()),
+		"PlaySessionId": fmt.Sprintf("%s-%d", m.ID, time.Now().UnixMilli()),
 	}, nil
 }
 

internal/service/emby_user_data.go

@@ -63,7 +63,15 @@ func (e *EmbyService) MarkPlayed(ctx context.Context, userID, mediaID string, pl
 }
 
 // RecordProgress 记录播放进度（来自 Emby 客户端的 /Sessions/Playing/Progress）。
+// 不携带 PlaySessionId 的旧调用仍保持兼容。
 func (e *EmbyService) RecordProgress(ctx context.Context, userID, mediaID string, positionTicks, runtimeTicks int64) error {
+	return e.RecordProgressWithSession(ctx, userID, mediaID, positionTicks, runtimeTicks, "")
+}
+
+// RecordProgressWithSession records an Emby progress update together with its
+// PlaySessionId. The server-issued ID contains a millisecond timestamp, which
+// lets the repository reject reports from an older playback session.
+func (e *EmbyService) RecordProgressWithSession(ctx context.Context, userID, mediaID string, positionTicks, runtimeTicks int64, playSessionID string) error {
 	pos := positionTicks / 10_000
 	dur := runtimeTicks / 10_000
 	if dur <= 0 {
@@ -89,14 +97,16 @@ func (e *EmbyService) RecordProgress(ctx context.Context, userID, mediaID string
 			}
 		}
 	}
-	completed := dur > 0 && pos >= dur*9/10
-	err := e.repo.History.Upsert(ctx, &model.PlaybackHistory{
-		UserID:     userID,
-		MediaID:    mediaID,
-		PositionMs: pos,
-		DurationMs: dur,
-		WatchedAt:  time.Now(),
-		Completed:  completed,
+	playSessionID = strings.TrimSpace(playSessionID)
+	err := e.repo.History.UpsertProgress(ctx, &model.PlaybackHistory{
+		UserID:             userID,
+		MediaID:            mediaID,
+		PositionMs:         pos,
+		DurationMs:         dur,
+		WatchedAt:          time.Now(),
+		Completed:          playbackProgressCompleted(pos, dur),
+		SessionID:          playSessionID,
+		SessionStartedAtMs: embyPlaySessionStartedAtMs(playSessionID),
 	})
 	if err == nil {
 		e.invalidateEmbyItemsCache(ctx)
@@ -104,6 +114,30 @@ func (e *EmbyService) RecordProgress(ctx context.Context, userID, mediaID string
 	return err
 }
 
+// embyPlaySessionStartedAtMs extracts the millisecond timestamp embedded in a
+// MeBox-issued PlaySessionId. Older IDs used seconds, so normalize those too.
+func embyPlaySessionStartedAtMs(playSessionID string) int64 {
+	playSessionID = strings.TrimSpace(playSessionID)
+	if playSessionID == "" {
+		return 0
+	}
+	idx := strings.LastIndex(playSessionID, "-")
+	if idx < 0 || idx == len(playSessionID)-1 {
+		return 0
+	}
+	value, err := strconv.ParseInt(playSessionID[idx+1:], 10, 64)
+	if err != nil || value <= 0 {
+		return 0
+	}
+	if value >= 1_000_000_000 && value < 1_000_000_000_000 {
+		value *= 1000
+	}
+	if value < 1_000_000_000_000 {
+		return 0
+	}
+	return value
+}
+
 // mergeRemoteUserData applies the current MeBox user's locally recorded playback
 // and favourite state to remote Emby payloads.
 func (e *EmbyService) mergeRemoteUserData(ctx context.Context, userID string, payload any) error {

internal/service/media_cache.go

@@ -35,7 +35,7 @@ func (s *MediaService) mediaListCacheKey(libraryID string, libraryIDs []string,
 	return "media:list:" + hex.EncodeToString(sum[:])
 }
 
-func (s *MediaService) libraryPreviewCacheKey(libraries []model.Library, cardLimit int, filter repository.MediaQueryFilter) string {
+func (s *MediaService) libraryPreviewCacheKey(libraries []model.Library, cardLimit int, filter repository.MediaQueryFilter, includeCounts bool) string {
 	libIDs := make([]string, len(libraries))
 	for i, lib := range libraries {
 		libIDs[i] = lib.ID
@@ -48,7 +48,7 @@ func (s *MediaService) libraryPreviewCacheKey(libraries []model.Library, cardLim
 	sum := sha1.Sum([]byte(strings.Join([]string{
 		"preview",
 		strings.Join(libIDs, ","),
-		fmt.Sprintf("%d:%t", cardLimit, filter.IncludeNSFW),
+		fmt.Sprintf("%d:%t:%t", cardLimit, filter.IncludeNSFW, includeCounts),
 		strings.Join(allowed, ","),
 		strings.Join(hidden, ","),
 	}, "|")))
@@ -87,15 +87,19 @@ func hashObjectCacheKey(parts []string) string {
 	return hex.EncodeToString(sum[:])
 }
 
-// mediaGroupedRowsCacheKey 版本分组源行（已挂库元数据）的对象缓存。
-func (s *MediaService) mediaGroupedRowsCacheKey(libraryID string, libraryIDs []string, filter repository.MediaQueryFilter) string {
+// groupedItemsCacheKey caches the fully grouped version list. Version grouping
+// requires scanning every row in the library, so recomputing it for each page
+// request makes pagination O(pages × library size) instead of O(library size).
+// Only the grouped result is cached; caching the ungrouped rows as well would
+// duplicate large libraries in the process memory for no additional hit path.
+func (s *MediaService) groupedItemsCacheKey(libraryID string, libraryIDs []string, filter repository.MediaQueryFilter) string {
 	libs := append([]string(nil), libraryIDs...)
 	sort.Strings(libs)
 	allowed := append([]string(nil), filter.AllowedLibraryIDs...)
 	hidden := append([]string(nil), filter.HiddenLibraryIDs...)
 	sort.Strings(allowed)
 	sort.Strings(hidden)
-	return "media:obj:grouped-rows:" + hashObjectCacheKey([]string{
+	return "media:obj:grouped-items:" + hashObjectCacheKey([]string{
 		libraryID,
 		strings.Join(libs, ","),
 		fmt.Sprintf("%t", filter.IncludeNSFW),

internal/service/media_display_library.go

@@ -2,6 +2,7 @@ package service
 
 import (
 	"context"
+	"sort"
 	"strings"
 
 	"github.com/truewhile/MeBox/internal/model"
@@ -12,14 +13,12 @@ func (s *MediaService) attachLibraryMetadata(ctx context.Context, items []model.
 	if s == nil || s.repo == nil || s.repo.Library == nil || len(items) == 0 {
 		return
 	}
-	libs, err := s.repo.Library.List(ctx)
+	libs, err := s.displayLibraries(ctx)
 	if err != nil {
 		return
 	}
 	byID := make(map[string]model.Library, len(libs))
-	for i := range libs {
-		libs[i] = normalizeLocalLibraryPathForDisplay(libs[i])
-		lib := libs[i]
+	for _, lib := range libs {
 		byID[lib.ID] = lib
 	}
 	resolver := newMediaDisplayLibraryResolver(ctx, s.repo, libs)
@@ -44,11 +43,39 @@ func (s *MediaService) attachLibraryMetadata(ctx context.Context, items []model.
 	}
 }
 
+func (s *MediaService) displayLibraries(ctx context.Context) ([]model.Library, error) {
+	const cacheKey = "media:obj:library-metadata"
+	if s.cache != nil {
+		if cachedObj, ok := s.cache.GetObject(cacheKey); ok {
+			if cached, ok := cachedObj.([]model.Library); ok {
+				return cached, nil
+			}
+		}
+	}
+	libs, err := s.repo.Library.List(ctx)
+	if err != nil {
+		return nil, err
+	}
+	for i := range libs {
+		libs[i] = normalizeLocalLibraryPathForDisplay(libs[i])
+	}
+	if s.cache != nil {
+		s.cache.SetObject(cacheKey, libs, s.mediaObjectTTL())
+	}
+	return libs, nil
+}
+
 type mediaDisplayLibraryResolver struct {
 	byID              map[string]model.Library
 	displayByID       map[string]model.Library
 	displayByMergeKey map[string]model.Library
 	displayLibraries  []model.Library
+	localDisplays     []mediaLocalDisplayLibrary
+}
+
+type mediaLocalDisplayLibrary struct {
+	library model.Library
+	path    string
 }
 
 func newMediaDisplayLibraryResolver(ctx context.Context, repo *repository.Container, libs []model.Library) mediaDisplayLibraryResolver {
@@ -58,6 +85,7 @@ func newMediaDisplayLibraryResolver(ctx context.Context, repo *repository.Contai
 		displayByID:       make(map[string]model.Library, len(displayLibraries)),
 		displayByMergeKey: make(map[string]model.Library, len(displayLibraries)),
 		displayLibraries:  displayLibraries,
+		localDisplays:     make([]mediaLocalDisplayLibrary, 0, len(displayLibraries)),
 	}
 	for _, lib := range libs {
 		normalized := normalizeLocalLibraryPathForDisplay(lib)
@@ -70,7 +98,23 @@ func newMediaDisplayLibraryResolver(ctx context.Context, repo *repository.Contai
 				resolver.displayByMergeKey[key] = lib
 			}
 		}
+		if _, ok := ParseCloudLibraryMount(lib.Path); ok || !lib.Enabled {
+			continue
+		}
+		displayPath := cleanPathForVolumeMapping(resolveMappedDestinationPath(lib.Path))
+		if displayPath == "" || displayPath == "." {
+			continue
+		}
+		resolver.localDisplays = append(resolver.localDisplays, mediaLocalDisplayLibrary{
+			library: lib,
+			path:    displayPath,
+		})
 	}
+	// 最长路径优先：一次命中就是原逻辑中最具体的媒体库，避免每条媒体都
+	// 重新规范化全部库路径并扫描整个库列表。
+	sort.SliceStable(resolver.localDisplays, func(i, j int) bool {
+		return len(resolver.localDisplays[i].path) > len(resolver.localDisplays[j].path)
+	})
 	return resolver
 }
 
@@ -172,26 +216,10 @@ func (r mediaDisplayLibraryResolver) bestPathDisplayLibrary(media model.Media) (
 	if isRelativeVolumeMarkerPath(media.Path) {
 		mediaPath = cleanPathForVolumeMapping(resolveMappedDestinationPath(media.Path))
 	}
-	var best model.Library
-	bestLen := 0
-	for _, lib := range r.displayLibraries {
-		if _, ok := ParseCloudLibraryMount(lib.Path); ok || !lib.Enabled {
-			continue
+	for _, display := range r.localDisplays {
+		if mediaPath == display.path || strings.HasPrefix(mediaPath, strings.TrimRight(display.path, "/")+"/") {
+			return display.library, true
 		}
-		libPath := cleanPathForVolumeMapping(resolveMappedDestinationPath(lib.Path))
-		if libPath == "" || libPath == "." {
-			continue
-		}
-		if mediaPath != libPath && !strings.HasPrefix(mediaPath, strings.TrimRight(libPath, "/")+"/") {
-			continue
-		}
-		if len(libPath) > bestLen {
-			best = lib
-			bestLen = len(libPath)
-		}
-	}
-	if bestLen > 0 {
-		return best, true
 	}
 	return model.Library{}, false
 }

internal/service/media_display_library_test.go

@@ -0,0 +1,43 @@
+package service
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+func TestMediaDisplayLibraryResolverUsesMostSpecificPath(t *testing.T) {
+	root := t.TempDir()
+	parentPath := filepath.Join(root, "media")
+	nestedPath := filepath.Join(parentPath, "anime")
+	parent := model.Library{
+		Base:    model.Base{ID: "parent"},
+		Name:    "媒体",
+		Path:    parentPath,
+		Enabled: true,
+	}
+	nested := model.Library{
+		Base:    model.Base{ID: "nested"},
+		Name:    "动漫",
+		Path:    nestedPath,
+		Enabled: true,
+	}
+
+	resolver := newMediaDisplayLibraryResolver(t.Context(), nil, []model.Library{parent, nested})
+	got, ok := resolver.DisplayLibraryForMedia(model.Media{
+		LibraryID: parent.ID,
+		Path:      filepath.Join(nestedPath, "Show", "S01E01.mkv"),
+	})
+	if !ok || got.ID != nested.ID {
+		t.Fatalf("display library = %q, %t; want nested library", got.ID, ok)
+	}
+
+	got, ok = resolver.DisplayLibraryForMedia(model.Media{
+		LibraryID: parent.ID,
+		Path:      filepath.Join(parentPath, "Movie", "Movie.mkv"),
+	})
+	if !ok || got.ID != parent.ID {
+		t.Fatalf("display library = %q, %t; want parent library", got.ID, ok)
+	}
+}

internal/service/media_library.go

@@ -26,6 +26,17 @@ func (s *MediaService) ListLibraries(ctx context.Context) ([]model.Library, erro
 
 // ListLibrariesWithPreview returns libraries populated with item counts and latest preview cards.
 func (s *MediaService) ListLibrariesWithPreview(ctx context.Context, libraries []model.Library, visibility MediaVisibility, cardLimit int) ([]LibraryPreviewItem, error) {
+	return s.listLibrariesWithPreview(ctx, libraries, visibility, cardLimit, true)
+}
+
+// ListLibraryPreviews returns only the latest preview cards. The metadata
+// endpoint already returns totals, so preview batches used by the home and
+// library pages can skip an otherwise repeated COUNT(*) over every library.
+func (s *MediaService) ListLibraryPreviews(ctx context.Context, libraries []model.Library, visibility MediaVisibility, cardLimit int) ([]LibraryPreviewItem, error) {
+	return s.listLibrariesWithPreview(ctx, libraries, visibility, cardLimit, false)
+}
+
+func (s *MediaService) listLibrariesWithPreview(ctx context.Context, libraries []model.Library, visibility MediaVisibility, cardLimit int, includeCounts bool) ([]LibraryPreviewItem, error) {
 	if cardLimit <= 0 {
 		cardLimit = 10
 	}
@@ -40,7 +51,7 @@ func (s *MediaService) ListLibrariesWithPreview(ctx context.Context, libraries [
 		AllowedLibraryIDs: visibility.AllowedLibraryIDs,
 		HiddenLibraryIDs:  visibility.HiddenLibraryIDs,
 	}
-	cacheKey := s.libraryPreviewCacheKey(libraries, cardLimit, filter)
+	cacheKey := s.libraryPreviewCacheKey(libraries, cardLimit, filter, includeCounts)
 	var cached libraryPreviewCacheValue
 	if s.cache != nil && s.cache.GetJSON(ctx, cacheKey, &cached) {
 		return cached.Items, nil
@@ -56,22 +67,26 @@ func (s *MediaService) ListLibrariesWithPreview(ctx context.Context, libraries [
 		libIDs = append(libIDs, lib.ID)
 	}
 
-	counts, err := s.repo.Media.CountByLibraries(ctx, libIDs, filter)
-	if err != nil {
-		return nil, err
-	}
-
-	for i := range out {
-		if total, ok := counts[out[i].ID]; ok {
-			out[i].Total = total
+	if includeCounts {
+		counts, err := s.repo.Media.CountByLibraries(ctx, libIDs, filter)
+		if err != nil {
+			return nil, err
+		}
+		for i := range out {
+			if total, ok := counts[out[i].ID]; ok {
+				out[i].Total = total
+			}
 		}
 	}
 
-	fetchCount := cardLimit * 4
-	if fetchCount < 60 {
-		fetchCount = 60
-	} else if fetchCount > 200 {
-		fetchCount = 200
+	// Preview rows are only an internal candidate window. Keep it bounded so a
+	// library with a very long series cannot turn a homepage request into a full
+	// 50k-row scan merely to find another distinct card.
+	fetchCount := cardLimit * 12
+	if fetchCount < 120 {
+		fetchCount = 120
+	} else if fetchCount > 400 {
+		fetchCount = 400
 	}
 
 	recentByLibrary, err := s.repo.Media.ListRecentByLibraries(ctx, libIDs, fetchCount, filter)
@@ -81,9 +96,6 @@ func (s *MediaService) ListLibrariesWithPreview(ctx context.Context, libraries [
 
 	allPreviewItems := make([]model.Media, 0, len(libIDs)*fetchCount)
 	for i := range out {
-		if out[i].Total == 0 {
-			continue
-		}
 		items := recentByLibrary[out[i].ID]
 		if len(items) == 0 {
 			continue
@@ -93,28 +105,18 @@ func (s *MediaService) ListLibrariesWithPreview(ctx context.Context, libraries [
 	s.attachLibraryMetadata(ctx, allPreviewItems)
 
 	for i := range out {
-		if out[i].Total == 0 {
-			continue
-		}
 		items := recentByLibrary[out[i].ID]
 		if len(items) == 0 {
 			continue
 		}
-			cards := groupMediaSeriesCards(items)
-			// 如果折叠后的作品部数不足 cardLimit，且该库总记录数大于当前提取的条目数，
-			// 说明多集剧集折叠占满了提取窗口，调用 ListLibrarySeriesCards 补齐完整的影视部数。
-			if len(cards) < cardLimit && out[i].Total > int64(len(items)) {
-				if fullCards, _, err := s.ListLibrarySeriesCards(ctx, out[i].ID, visibility); err == nil && len(fullCards) > 0 {
-					cards = fullCards
-				}
-			}
-			if len(cards) > cardLimit {
-				cards = cards[:cardLimit]
-			}
-			if cards == nil {
-				cards = []SeriesCard{}
-			}
-			out[i].Cards = cards
+		cards := groupMediaSeriesCards(items)
+		if len(cards) > cardLimit {
+			cards = cards[:cardLimit]
+		}
+		if cards == nil {
+			cards = []SeriesCard{}
+		}
+		out[i].Cards = cards
 	}
 
 	if s.cache != nil {

internal/service/media_library_test.go

@@ -155,3 +155,28 @@ func TestListLibrariesWithPreviewLongSeriesCompletion(t *testing.T) {
 		t.Fatalf("previews[0].Cards count = %d, want 2", len(previews[0].Cards))
 	}
 }
+
+func TestListLibraryPreviewsSkipsTotals(t *testing.T) {
+	db := newServiceTestDB(t, &model.Library{}, &model.Media{})
+	repos := repository.New(db)
+	lib := model.Library{Name: "电影", Path: "/media/movies", Type: "movie", Enabled: true}
+	if err := repos.Library.Create(t.Context(), &lib); err != nil {
+		t.Fatal(err)
+	}
+	if err := repos.DB.Create(&model.Media{
+		LibraryID: lib.ID,
+		Title:     "预览电影",
+		Path:      "/media/movies/预览电影.mkv",
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos)
+	previews, err := svc.ListLibraryPreviews(t.Context(), []model.Library{lib}, MediaVisibility{IncludeNSFW: true}, 10)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(previews) != 1 || previews[0].Total != 0 || len(previews[0].Cards) != 1 {
+		t.Fatalf("preview-only result = %#v, want one card and no count", previews)
+	}
+}

internal/service/media_listing.go

@@ -56,14 +56,45 @@ func (s *MediaService) ListMediaVisible(ctx context.Context, libraryID string, p
 
 func (s *MediaService) ListMediaVisibleGrouped(ctx context.Context, libraryID string, page, pageSize int, visibility MediaVisibility) ([]MediaItem, int64, error) {
 	page, pageSize = normalizeGroupedMediaPage(page, pageSize)
-	items, err := s.listMediaVisibleForGrouping(ctx, libraryID, visibility)
+	grouped, err := s.GroupedMediaVisible(ctx, libraryID, visibility)
 	if err != nil {
 		return nil, 0, err
 	}
-	grouped := groupMediaVersions(items)
 	return paginateMediaItems(grouped, page, pageSize), int64(len(grouped)), nil
 }
 
+// GroupedMediaVisible returns the complete version-grouped media list before pagination.
+// The result is cached as an immutable slice; sort/pagination callers must copy it before mutating.
+func (s *MediaService) GroupedMediaVisible(ctx context.Context, libraryID string, visibility MediaVisibility) ([]MediaItem, error) {
+	visibility = ExpandMediaVisibilityForMergedCloudLibraries(ctx, s.repo, visibility)
+	libraryIDs, err := MergedLibraryIDsForLibrary(ctx, s.repo, libraryID)
+	if err != nil {
+		return nil, err
+	}
+	filter := repository.MediaQueryFilter{
+		IncludeNSFW:       visibility.IncludeNSFW,
+		AllowedLibraryIDs: visibility.AllowedLibraryIDs,
+		HiddenLibraryIDs:  visibility.HiddenLibraryIDs,
+	}
+	itemsCacheKey := s.groupedItemsCacheKey(libraryID, libraryIDs, filter)
+	if s.cache != nil {
+		if cachedObj, ok := s.cache.GetObject(itemsCacheKey); ok {
+			if cached, ok := cachedObj.([]MediaItem); ok {
+				return cached, nil
+			}
+		}
+	}
+	items, err := s.listMediaVisibleForGrouping(ctx, libraryID, visibility)
+	if err != nil {
+		return nil, err
+	}
+	grouped := groupMediaVersions(items)
+	if s.cache != nil && len(grouped) > 0 {
+		s.cache.SetObject(itemsCacheKey, grouped, s.mediaObjectTTL())
+	}
+	return grouped, nil
+}
+
 func (s *MediaService) listMediaVisibleForGrouping(ctx context.Context, libraryID string, visibility MediaVisibility) ([]model.Media, error) {
 	visibility = ExpandMediaVisibilityForMergedCloudLibraries(ctx, s.repo, visibility)
 	libraryIDs, err := MergedLibraryIDsForLibrary(ctx, s.repo, libraryID)
@@ -75,30 +106,19 @@ func (s *MediaService) listMediaVisibleForGrouping(ctx context.Context, libraryI
 		AllowedLibraryIDs: visibility.AllowedLibraryIDs,
 		HiddenLibraryIDs:  visibility.HiddenLibraryIDs,
 	}
-	cacheKey := s.mediaGroupedRowsCacheKey(libraryID, libraryIDs, filter)
-	if s.cache != nil {
-		if cachedObj, ok := s.cache.GetObject(cacheKey); ok {
-			if cached, ok := cachedObj.([]model.Media); ok {
-				// 对象缓存中的切片视为不可变；attachLibraryMetadata 会在填充时
-				// 执行过，命中路径直接返回副本即可（调用方只读）。
-				return cached, nil
-			}
-		}
-	}
-	items, total, err := s.repo.Media.ListByLibrariesFiltered(ctx, libraryIDs, 0, maxMediaSearchLimit, filter)
+	// 版本分组的 URL 分页发生在 Go 进程内，响应里的 total 是分组后的数量，
+	// 不需要数据库再为原始行做一次 COUNT(*)。全量 COUNT 在超大媒体库上
+	// 会重复扫描整个 library_id 范围，而这里只关心是否存在截断风险。
+	items, err := s.repo.Media.ListByLibrariesFilteredNoCount(ctx, libraryIDs, 0, maxMediaSearchLimit, filter)
 	if err != nil {
 		return nil, err
 	}
-	if total > int64(len(items)) && s.log != nil {
-		s.log.Warn("media version grouping truncated by safety limit",
+	if len(items) >= maxMediaSearchLimit && s.log != nil {
+		s.log.Warn("media version grouping may be truncated by safety limit",
 			zap.String("library_id", libraryID),
-			zap.Int64("total", total),
 			zap.Int("limit", maxMediaSearchLimit))
 	}
 	s.attachLibraryMetadata(ctx, items)
-	if s.cache != nil {
-		s.cache.SetObject(cacheKey, items, s.mediaObjectTTL())
-	}
 	return items, nil
 }
 

internal/service/media_series.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
 )
 
 type seriesCardsCacheValue struct {
@@ -24,6 +25,7 @@ type libraryRowsCacheValue struct {
 	Rows     []model.Media
 	Resolver mediaSeriesKeyResolver
 	Episodes map[string][]model.Media
+	Cards    []SeriesCard
 }
 
 type SeriesCard struct {
@@ -41,6 +43,7 @@ type seriesCardGroup struct {
 
 // libraryRowsWithIndex 返回整库行与预计算剧集索引（带对象缓存）。
 func (s *MediaService) libraryRowsWithIndex(ctx context.Context, libraryID string, visibility MediaVisibility) (*libraryRowsCacheValue, error) {
+	visibility = ExpandMediaVisibilityForMergedCloudLibraries(ctx, s.repo, visibility)
 	cacheKey := s.libraryRowsCacheKey(libraryID, visibility)
 	if s.cache != nil {
 		if obj, ok := s.cache.GetObject(cacheKey); ok {
@@ -55,16 +58,17 @@ func (s *MediaService) libraryRowsWithIndex(ctx context.Context, libraryID strin
 	}
 	// listAllMediaVisible 走 ListMediaVisible，行已带库元数据（resolver 的
 	// key 计算依赖 DisplayLibraryPath/ID）。
-	resolver := newMediaSeriesKeyResolver(rows)
+	resolver, keys := resolveMediaSeriesKeys(rows)
 	episodes := make(map[string][]model.Media, len(rows)/4+1)
-	for _, row := range rows {
-		k := resolver.key(row)
+	for i, row := range rows {
+		k := keys[i]
 		if k == "" {
 			continue
 		}
 		episodes[k] = append(episodes[k], row)
 	}
-	value := &libraryRowsCacheValue{Rows: rows, Resolver: resolver, Episodes: episodes}
+	cards := groupMediaSeriesCardsByKeys(rows, keys)
+	value := &libraryRowsCacheValue{Rows: rows, Resolver: resolver, Episodes: episodes, Cards: cards}
 	if s.cache != nil {
 		s.cache.SetObject(cacheKey, value, s.mediaObjectTTL())
 	}
@@ -72,7 +76,6 @@ func (s *MediaService) libraryRowsWithIndex(ctx context.Context, libraryID strin
 }
 
 func (s *MediaService) ListLibrarySeriesCards(ctx context.Context, libraryID string, visibility MediaVisibility) ([]SeriesCard, int64, error) {
-	visibility = ExpandMediaVisibilityForMergedCloudLibraries(ctx, s.repo, visibility)
 	cacheKey := s.libraryCardsObjectKey(libraryID, visibility)
 	if s.cache != nil {
 		if obj, ok := s.cache.GetObject(cacheKey); ok {
@@ -85,7 +88,12 @@ func (s *MediaService) ListLibrarySeriesCards(ctx context.Context, libraryID str
 	if err != nil {
 		return nil, 0, err
 	}
-	cards := groupMediaSeriesCards(rows.Rows)
+	cards := rows.Cards
+	if cards == nil && len(rows.Rows) > 0 {
+		// Fallback keeps rolling-cache compatibility if an older runtime cache
+		// value was created before Cards was added.
+		cards = groupMediaSeriesCards(rows.Rows)
+	}
 	if cards == nil {
 		cards = []SeriesCard{}
 	}
@@ -190,40 +198,40 @@ func (s *MediaService) ListMediaEpisodes(ctx context.Context, mediaID string, vi
 		}
 	}
 
-		// 如果没有聚合到多集，尝试同父目录匹配（排除合集目录和公共分类目录，且同目录文件不能是互不相同的独立电影）
-		if len(out) <= 1 && target.Path != "" {
-			targetDir := filepath.Dir(strings.ReplaceAll(target.Path, "\\", "/"))
-			parentBase := filepath.Base(targetDir)
-			if !mediaParentLooksLikeCollection(target.Path) && !seriesTitleIsGenericContainer(parentBase, *target) {
-				targetTitleNorm := normalizeSeriesTitle(target.Title)
-				targetDirNorm := normalizeSeriesTitle(parentBase)
-				dirMatches := make([]model.Media, 0)
-				for _, row := range rows {
-					if row.Path == "" || filepath.Dir(strings.ReplaceAll(row.Path, "\\", "/")) != targetDir {
-						continue
-					}
-					if row.ID == target.ID {
-						dirMatches = append(dirMatches, row)
-						continue
-					}
-					rowTitleNorm := normalizeSeriesTitle(row.Title)
-					allowMatch := false
-					if isGenericMovieTitle(rowTitleNorm) || isGenericMovieTitle(targetTitleNorm) {
-						allowMatch = true
-					} else if rowTitleNorm != "" && rowTitleNorm == targetTitleNorm {
-						allowMatch = true
-					} else if rowTitleNorm != "" && targetDirNorm != "" && rowTitleNorm == targetDirNorm {
-						allowMatch = true
-					}
-					if allowMatch {
-						dirMatches = append(dirMatches, row)
-					}
+	// 如果没有聚合到多集，尝试同父目录匹配（排除合集目录和公共分类目录，且同目录文件不能是互不相同的独立电影）
+	if len(out) <= 1 && target.Path != "" {
+		targetDir := filepath.Dir(strings.ReplaceAll(target.Path, "\\", "/"))
+		parentBase := filepath.Base(targetDir)
+		if !mediaParentLooksLikeCollection(target.Path) && !seriesTitleIsGenericContainer(parentBase, *target) {
+			targetTitleNorm := normalizeSeriesTitle(target.Title)
+			targetDirNorm := normalizeSeriesTitle(parentBase)
+			dirMatches := make([]model.Media, 0)
+			for _, row := range rows {
+				if row.Path == "" || filepath.Dir(strings.ReplaceAll(row.Path, "\\", "/")) != targetDir {
+					continue
 				}
-				if len(dirMatches) > 1 {
-					out = dirMatches
+				if row.ID == target.ID {
+					dirMatches = append(dirMatches, row)
+					continue
+				}
+				rowTitleNorm := normalizeSeriesTitle(row.Title)
+				allowMatch := false
+				if isGenericMovieTitle(rowTitleNorm) || isGenericMovieTitle(targetTitleNorm) {
+					allowMatch = true
+				} else if rowTitleNorm != "" && rowTitleNorm == targetTitleNorm {
+					allowMatch = true
+				} else if rowTitleNorm != "" && targetDirNorm != "" && rowTitleNorm == targetDirNorm {
+					allowMatch = true
+				}
+				if allowMatch {
+					dirMatches = append(dirMatches, row)
 				}
 			}
+			if len(dirMatches) > 1 {
+				out = dirMatches
+			}
 		}
+	}
 
 	if len(out) == 0 {
 		out = []model.Media{*target}
@@ -246,35 +254,47 @@ func (s *MediaService) ListMediaEpisodes(ctx context.Context, mediaID string, vi
 }
 
 func (s *MediaService) listAllMediaVisible(ctx context.Context, libraryID string, visibility MediaVisibility) ([]model.Media, int64, error) {
-	const pageSize = 2000
-	var all []model.Media
-	var total int64
-	for page := 1; ; page++ {
-		rows, n, err := s.ListMediaVisible(ctx, libraryID, page, pageSize, visibility)
-		if err != nil {
-			return nil, 0, err
-		}
-		if page == 1 {
-			total = n
-			all = make([]model.Media, 0, minInt64(n, pageSize))
-		}
-		all = append(all, rows...)
-		if int64(len(all)) >= n || len(rows) < pageSize {
-			break
-		}
+	visibility = ExpandMediaVisibilityForMergedCloudLibraries(ctx, s.repo, visibility)
+	libraryIDs, err := MergedLibraryIDsForLibrary(ctx, s.repo, libraryID)
+	if err != nil {
+		return nil, 0, err
 	}
-	return all, total, nil
+	filter := repository.MediaQueryFilter{
+		IncludeNSFW:       visibility.IncludeNSFW,
+		AllowedLibraryIDs: visibility.AllowedLibraryIDs,
+		HiddenLibraryIDs:  visibility.HiddenLibraryIDs,
+	}
+	rows, err := s.repo.Media.ListAllByLibrariesFilteredNoCount(ctx, libraryIDs, filter)
+	if err != nil {
+		return nil, 0, err
+	}
+	s.attachLibraryMetadata(ctx, rows)
+	return rows, int64(len(rows)), nil
 }
 
 func groupMediaSeriesCards(items []model.Media) []SeriesCard {
 	if len(items) == 0 {
 		return nil
 	}
+	_, keys := resolveMediaSeriesKeys(items)
+	return groupMediaSeriesCardsByKeys(items, keys)
+}
+
+// groupMediaSeriesCardsByKeys performs the card fold using already-resolved
+// keys. Full-library caches need the same keys for the episode index and the
+// series-card list; resolving them once avoids several regex-heavy passes over
+// every episode row.
+func groupMediaSeriesCardsByKeys(items []model.Media, keys []string) []SeriesCard {
+	if len(items) == 0 {
+		return nil
+	}
+	if len(keys) != len(items) {
+		return groupMediaSeriesCards(items)
+	}
 	groups := make([]seriesCardGroup, 0)
 	byKey := make(map[string]int, len(items))
-	resolver := newMediaSeriesKeyResolver(items)
-	for _, item := range items {
-		key := resolver.key(item)
+	for i, item := range items {
+		key := keys[i]
 		if key == "" {
 			continue
 		}

internal/service/media_series_resolver.go

@@ -14,75 +14,123 @@ type mediaSeriesKeyResolver struct {
 	pathTitles     map[string]string
 }
 
+// mediaSeriesKeyInputs 保存单条媒体解析剧集 key 所需的派生字段。剧集卡片、
+// 剧集索引和分页分组需要反复读取同一批行；提前计算一次可以避免对每行执行
+// 多轮正则匹配、路径解析和标题规范化。
+type mediaSeriesKeyInputs struct {
+	episodic    bool
+	pathKey     string
+	externalKey string
+	titleKey    string
+}
+
+func analyzeMediaSeriesKey(item model.Media) mediaSeriesKeyInputs {
+	if !mediaLooksEpisodicForGrouping(item) {
+		return mediaSeriesKeyInputs{}
+	}
+	return mediaSeriesKeyInputs{
+		episodic:    true,
+		pathKey:     mediaSeriesRawKey(item),
+		externalKey: repeatedSeriesExternalKey(item),
+		titleKey:    repeatedSeriesTitleKey(item),
+	}
+}
+
+func analyzeMediaSeriesKeys(items []model.Media) []mediaSeriesKeyInputs {
+	inputs := make([]mediaSeriesKeyInputs, len(items))
+	for i := range items {
+		inputs[i] = analyzeMediaSeriesKey(items[i])
+	}
+	return inputs
+}
+
 func newMediaSeriesKeyResolver(items []model.Media) mediaSeriesKeyResolver {
+	return newMediaSeriesKeyResolverFromInputs(analyzeMediaSeriesKeys(items))
+}
+
+func newMediaSeriesKeyResolverFromInputs(inputs []mediaSeriesKeyInputs) mediaSeriesKeyResolver {
 	resolver := mediaSeriesKeyResolver{
 		pathCounts:     make(map[string]int),
 		externalCounts: make(map[string]int),
 		titleCounts:    make(map[string]int),
 		pathTitles:     make(map[string]string),
 	}
-	for _, item := range items {
-		if !mediaLooksEpisodicForGrouping(item) {
+	pathTitleCandidates := make(map[string]map[string]struct{})
+	for _, input := range inputs {
+		if !input.episodic {
 			continue
 		}
-		if key := mediaSeriesRawKey(item); strings.HasPrefix(key, "library-path") {
-			resolver.pathCounts[key]++
+		if strings.HasPrefix(input.pathKey, "library-path") {
+			resolver.pathCounts[input.pathKey]++
+			if input.titleKey != "" {
+				if pathTitleCandidates[input.pathKey] == nil {
+					pathTitleCandidates[input.pathKey] = make(map[string]struct{})
+				}
+				pathTitleCandidates[input.pathKey][input.titleKey] = struct{}{}
+			}
 		}
-		if key := repeatedSeriesExternalKey(item); key != "" {
-			resolver.externalCounts[key]++
+		if input.externalKey != "" {
+			resolver.externalCounts[input.externalKey]++
 		}
-		if key := repeatedSeriesTitleKey(item); key != "" {
-			resolver.titleCounts[key]++
+		if input.titleKey != "" {
+			resolver.titleCounts[input.titleKey]++
 		}
 	}
 	// A scraper can normalize the same show to one title while the source
 	// release folders still contain different tags (1080p/2160p, uploader
 	// names, etc.). Remember an unambiguous title alias for each path group so
 	// those folders are bridged instead of rendered as separate collections.
-	pathTitleCandidates := make(map[string]map[string]struct{})
-	for _, item := range items {
-		if !mediaLooksEpisodicForGrouping(item) {
-			continue
-		}
-		pathKey := mediaSeriesRawKey(item)
-		titleKey := repeatedSeriesTitleKey(item)
-		if !strings.HasPrefix(pathKey, "library-path") || titleKey == "" || resolver.titleCounts[titleKey] < 2 {
-			continue
-		}
-		if pathTitleCandidates[pathKey] == nil {
-			pathTitleCandidates[pathKey] = make(map[string]struct{})
-		}
-		pathTitleCandidates[pathKey][titleKey] = struct{}{}
-	}
 	for pathKey, candidates := range pathTitleCandidates {
-		if len(candidates) != 1 {
-			continue
-		}
+		repeatedTitle := ""
+		repeatedCount := 0
 		for titleKey := range candidates {
-			resolver.pathTitles[pathKey] = titleKey
+			if resolver.titleCounts[titleKey] < 2 {
+				continue
+			}
+			repeatedTitle = titleKey
+			repeatedCount++
+		}
+		if repeatedCount == 1 {
+			resolver.pathTitles[pathKey] = repeatedTitle
 		}
 	}
 	return resolver
 }
 
+// resolveMediaSeriesKeys 对输入只做一轮派生字段计算，返回可供后续 O(1) 解析的
+// resolver 以及每条记录对应的 key。这是整库剧集加载的快速路径。
+func resolveMediaSeriesKeys(items []model.Media) (mediaSeriesKeyResolver, []string) {
+	inputs := analyzeMediaSeriesKeys(items)
+	resolver := newMediaSeriesKeyResolverFromInputs(inputs)
+	keys := make([]string, len(items))
+	for i := range items {
+		keys[i] = resolver.keyFromInputs(items[i], inputs[i])
+	}
+	return resolver, keys
+}
+
 func (r mediaSeriesKeyResolver) key(media model.Media) string {
-	if mediaLooksEpisodicForGrouping(media) {
-		if pathKey := mediaSeriesRawKey(media); strings.HasPrefix(pathKey, "library-path") {
-			if titleKey := r.pathTitles[pathKey]; titleKey != "" {
+	return r.keyFromInputs(media, analyzeMediaSeriesKey(media))
+}
+
+func (r mediaSeriesKeyResolver) keyFromInputs(media model.Media, input mediaSeriesKeyInputs) string {
+	if input.episodic {
+		if strings.HasPrefix(input.pathKey, "library-path") {
+			if titleKey := r.pathTitles[input.pathKey]; titleKey != "" {
 				return compactSeriesKey(titleKey)
 			}
 			// A series directory is the strongest identity for mixed rows:
 			// main episodes and specials (CM/NCOP/PV/OVA) may be scraped to
 			// slightly different titles, but they still belong to one show.
-			if r.pathCounts[pathKey] > 1 {
-				return compactSeriesKey(pathKey)
+			if r.pathCounts[input.pathKey] > 1 {
+				return compactSeriesKey(input.pathKey)
 			}
 		}
-		if key := repeatedSeriesTitleKey(media); key != "" && r.titleCounts[key] > 1 {
-			return compactSeriesKey(key)
+		if input.titleKey != "" && r.titleCounts[input.titleKey] > 1 {
+			return compactSeriesKey(input.titleKey)
 		}
-		if key := repeatedSeriesExternalKey(media); key != "" && r.externalCounts[key] > 1 {
-			return compactSeriesKey(key)
+		if input.externalKey != "" && r.externalCounts[input.externalKey] > 1 {
+			return compactSeriesKey(input.externalKey)
 		}
 	}
 	return mediaSeriesKey(media)

internal/service/media_series_test.go

@@ -593,3 +593,47 @@ func TestListMediaEpisodesKeepsIndependentMoviesSeparate(t *testing.T) {
 		t.Fatalf("ListMediaEpisodes got %#v, want exactly m1", eps)
 	}
 }
+
+func TestListLibrarySeriesCardsCachesPrecomputedCards(t *testing.T) {
+	db := newServiceTestDB(t, &model.Library{}, &model.Media{})
+	repos := repository.New(db)
+	lib := model.Library{Name: "动画", Path: "/media/anime", Type: "anime", Enabled: true}
+	if err := repos.Library.Create(t.Context(), &lib); err != nil {
+		t.Fatal(err)
+	}
+	rows := []model.Media{
+		{LibraryID: lib.ID, Title: "示例动画", Path: "/media/anime/示例动画/S01E01.mkv", SeasonNum: 1, EpisodeNum: 1},
+		{LibraryID: lib.ID, Title: "示例动画", Path: "/media/anime/示例动画/S01E02.mkv", SeasonNum: 1, EpisodeNum: 2},
+	}
+	if err := repos.DB.Create(&rows).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos).
+		SetRuntimeCache(NewRuntimeCacheService(&config.Config{}, zap.NewNop()))
+	visibility := MediaVisibility{IncludeNSFW: true}
+	cards, total, err := svc.ListLibrarySeriesCards(t.Context(), lib.ID, visibility)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if total != 1 || len(cards) != 1 || cards[0].Count != 2 {
+		t.Fatalf("cold series cards = %#v, total = %d; want one two-episode card", cards, total)
+	}
+
+	cachedObj, ok := svc.cache.GetObject(svc.libraryRowsCacheKey(lib.ID, visibility))
+	if !ok {
+		t.Fatal("expected full library rows and precomputed cards to be cached")
+	}
+	cached, ok := cachedObj.(*libraryRowsCacheValue)
+	if !ok || cached.Cards == nil || len(cached.Cards) != 1 {
+		t.Fatalf("cached rows value = %#v, want one precomputed card", cachedObj)
+	}
+
+	cards, total, err = svc.ListLibrarySeriesCards(t.Context(), lib.ID, visibility)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if total != 1 || len(cards) != 1 || cards[0].Count != 2 {
+		t.Fatalf("warm series cards = %#v, total = %d; want cached result", cards, total)
+	}
+}

internal/service/media_sort.go

@@ -0,0 +1,256 @@
+package service
+
+import (
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+// MediaSortSpec is the normalized sort request shared by media and series endpoints.
+type MediaSortSpec struct {
+	Field string
+	Order string
+}
+
+// NormalizeMediaSort validates the request against the same fields the web UI
+// exposes. Unknown values fall back to the historical release-date ordering.
+func NormalizeMediaSort(field, order string) MediaSortSpec {
+	field = strings.ToLower(strings.TrimSpace(field))
+	switch field {
+	case "title", "release_date", "year", "created_at", "updated_at", "rating", "duration", "bitrate", "last_played", "random":
+	case "imdb_rating":
+		field = "rating"
+	default:
+		field = "release_date"
+	}
+
+	order = strings.ToLower(strings.TrimSpace(order))
+	if order != "asc" && order != "desc" {
+		if field == "title" {
+			order = "asc"
+		} else {
+			order = "desc"
+		}
+	}
+	if field == "random" {
+		// The web client shuffles the complete result so pagination stays stable.
+		field = "release_date"
+		order = "desc"
+	}
+	return MediaSortSpec{Field: field, Order: order}
+}
+
+// SortMediaItems returns a sorted copy of the grouped media list. The input is
+// often backed by an immutable runtime cache, so callers must not rely on the
+// returned slice aliasing it.
+func SortMediaItems(items []MediaItem, field, order string, history map[string]time.Time) []MediaItem {
+	spec := NormalizeMediaSort(field, order)
+	out := append([]MediaItem(nil), items...)
+	if len(out) < 2 {
+		return out
+	}
+	sort.SliceStable(out, func(i, j int) bool {
+		cmp := compareMediaByField(out[i], out[j], spec, history)
+		if cmp == 0 {
+			cmp = compareID(out[i].ID, out[j].ID)
+		}
+		return cmp < 0
+	})
+	return out
+}
+
+// SortSeriesCards returns a sorted copy of series cards.
+func SortSeriesCards(cards []SeriesCard, field, order string, history map[string]time.Time) []SeriesCard {
+	spec := NormalizeMediaSort(field, order)
+	out := append([]SeriesCard(nil), cards...)
+	if len(out) < 2 {
+		return out
+	}
+	sort.SliceStable(out, func(i, j int) bool {
+		cmp := compareSeriesByField(out[i], out[j], spec, history)
+		if cmp == 0 {
+			cmp = compareID(out[i].Key, out[j].Key)
+		}
+		return cmp < 0
+	})
+	return out
+}
+
+func compareMediaByField(a, b MediaItem, spec MediaSortSpec, history map[string]time.Time) int {
+	switch spec.Field {
+	case "title":
+		ta, tb := mediaSortTitle(a.Media), mediaSortTitle(b.Media)
+		return compareOrdered(strings.Compare(strings.ToLower(strings.TrimSpace(ta)), strings.ToLower(strings.TrimSpace(tb))), strings.TrimSpace(ta) != "", strings.TrimSpace(tb) != "", spec.Order)
+	case "release_date":
+		ta, oka := mediaReleaseTime(a.Media)
+		tb, okb := mediaReleaseTime(b.Media)
+		return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
+	case "year":
+		return compareOrdered(compareInt(a.Year, b.Year), true, true, spec.Order)
+	case "created_at":
+		return compareOrdered(compareTime(a.CreatedAt, b.CreatedAt), !a.CreatedAt.IsZero(), !b.CreatedAt.IsZero(), spec.Order)
+	case "updated_at":
+		ta, oka := mediaUpdatedTime(a.Media)
+		tb, okb := mediaUpdatedTime(b.Media)
+		return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
+	case "rating":
+		return compareOrdered(compareFloat(float64(a.Rating), float64(b.Rating)), true, true, spec.Order)
+	case "duration":
+		return compareOrdered(compareInt(a.DurationSec, b.DurationSec), true, true, spec.Order)
+	case "bitrate":
+		return compareOrdered(compareInt64(a.SizeBytes, b.SizeBytes), true, true, spec.Order)
+	case "last_played":
+		ta, oka := mediaItemLastPlayedTime(a, history)
+		tb, okb := mediaItemLastPlayedTime(b, history)
+		return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
+	default:
+		return 0
+	}
+}
+func compareSeriesByField(a, b SeriesCard, spec MediaSortSpec, history map[string]time.Time) int {
+	switch spec.Field {
+	case "title":
+		return compareOrdered(strings.Compare(strings.ToLower(strings.TrimSpace(mediaSortTitle(a.Rep))), strings.ToLower(strings.TrimSpace(mediaSortTitle(b.Rep)))), strings.TrimSpace(mediaSortTitle(a.Rep)) != "", strings.TrimSpace(mediaSortTitle(b.Rep)) != "", spec.Order)
+	case "release_date":
+		ta, oka := mediaReleaseTime(a.Rep)
+		tb, okb := mediaReleaseTime(b.Rep)
+		return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
+	case "year":
+		return compareOrdered(compareInt(a.Rep.Year, b.Rep.Year), true, true, spec.Order)
+	case "created_at":
+		return compareOrdered(compareTime(a.Rep.CreatedAt, b.Rep.CreatedAt), !a.Rep.CreatedAt.IsZero(), !b.Rep.CreatedAt.IsZero(), spec.Order)
+	case "updated_at":
+		ta, oka := seriesUpdatedTime(a)
+		tb, okb := seriesUpdatedTime(b)
+		return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
+	case "rating":
+		return compareOrdered(compareFloat(float64(a.Rep.Rating), float64(b.Rep.Rating)), true, true, spec.Order)
+	case "duration":
+		return compareOrdered(compareInt(a.Rep.DurationSec, b.Rep.DurationSec), true, true, spec.Order)
+	case "bitrate":
+		return compareOrdered(compareInt64(a.Rep.SizeBytes, b.Rep.SizeBytes), true, true, spec.Order)
+	case "last_played":
+		ta, oka := seriesLastPlayed(a, history)
+		tb, okb := seriesLastPlayed(b, history)
+		return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
+	default:
+		return 0
+	}
+}
+
+func mediaSortTitle(m model.Media) string {
+	if strings.TrimSpace(m.Title) != "" {
+		return m.Title
+	}
+	return m.OriginalName
+}
+
+func mediaReleaseTime(m model.Media) (time.Time, bool) {
+	if raw := strings.TrimSpace(m.ReleaseDate); raw != "" {
+		if parsed, err := time.Parse("2006-01-02", raw); err == nil {
+			return parsed, true
+		}
+	}
+	if m.Year > 0 {
+		return time.Date(m.Year, time.January, 1, 0, 0, 0, 0, time.UTC), true
+	}
+	return time.Time{}, false
+}
+
+func mediaUpdatedTime(m model.Media) (time.Time, bool) {
+	if !m.UpdatedAt.IsZero() {
+		return m.UpdatedAt, true
+	}
+	if !m.CreatedAt.IsZero() {
+		return m.CreatedAt, true
+	}
+	return time.Time{}, false
+}
+
+func seriesUpdatedTime(card SeriesCard) (time.Time, bool) {
+	if card.LastAddedAt != nil && !card.LastAddedAt.IsZero() {
+		return *card.LastAddedAt, true
+	}
+	return mediaUpdatedTime(card.Rep)
+}
+
+func seriesLastPlayed(card SeriesCard, history map[string]time.Time) (time.Time, bool) {
+	for _, id := range []string{card.Rep.ID, card.LinkMedia.ID} {
+		if played, ok := history[id]; ok {
+			return played, true
+		}
+	}
+	return time.Time{}, false
+}
+
+func mediaItemLastPlayedTime(item MediaItem, history map[string]time.Time) (time.Time, bool) {
+	best, found := history[item.ID]
+	for _, version := range item.Versions {
+		if played, ok := history[version.ID]; ok && (!found || played.After(best)) {
+			best = played
+			found = true
+		}
+	}
+	return best, found
+}
+func compareOrdered(cmp int, aValid, bValid bool, order string) int {
+	if !aValid && !bValid {
+		return 0
+	}
+	if !aValid {
+		return 1
+	}
+	if !bValid {
+		return -1
+	}
+	if order == "desc" {
+		return -cmp
+	}
+	return cmp
+}
+
+func compareTime(a, b time.Time) int {
+	if a.Before(b) {
+		return -1
+	}
+	if a.After(b) {
+		return 1
+	}
+	return 0
+}
+
+func compareInt(a, b int) int {
+	if a < b {
+		return -1
+	}
+	if a > b {
+		return 1
+	}
+	return 0
+}
+
+func compareInt64(a, b int64) int {
+	if a < b {
+		return -1
+	}
+	if a > b {
+		return 1
+	}
+	return 0
+}
+
+func compareFloat(a, b float64) int {
+	if a < b {
+		return -1
+	}
+	if a > b {
+		return 1
+	}
+	return 0
+}
+
+func compareID(a, b string) int {
+	return strings.Compare(a, b)
+}

internal/service/media_sort_test.go

@@ -0,0 +1,42 @@
+package service
+
+import (
+	"testing"
+
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+func TestSortMediaItemsTitleAscEmptyLast(t *testing.T) {
+	items := []MediaItem{
+		{Media: model.Media{Base: model.Base{ID: "b"}, Title: "Beta"}},
+		{Media: model.Media{Base: model.Base{ID: "empty"}}},
+		{Media: model.Media{Base: model.Base{ID: "a"}, Title: "alpha"}},
+	}
+	got := SortMediaItems(items, "title", "asc", nil)
+	if got[0].ID != "a" || got[1].ID != "b" || got[2].ID != "empty" {
+		t.Fatalf("title order = %q, %q, %q", got[0].ID, got[1].ID, got[2].ID)
+	}
+}
+
+func TestSortMediaItemsReleaseDescEmptyLast(t *testing.T) {
+	items := []MediaItem{
+		{Media: model.Media{Base: model.Base{ID: "old"}, ReleaseDate: "2020-01-01"}},
+		{Media: model.Media{Base: model.Base{ID: "empty"}}},
+		{Media: model.Media{Base: model.Base{ID: "new"}, ReleaseDate: "2024-01-01"}},
+	}
+	got := SortMediaItems(items, "release_date", "desc", nil)
+	if got[0].ID != "new" || got[1].ID != "old" || got[2].ID != "empty" {
+		t.Fatalf("release order = %q, %q, %q", got[0].ID, got[1].ID, got[2].ID)
+	}
+}
+
+func TestSortSeriesCardsTitleAsc(t *testing.T) {
+	cards := []SeriesCard{
+		{Key: "b", Rep: model.Media{Base: model.Base{ID: "b"}, Title: "Beta"}},
+		{Key: "a", Rep: model.Media{Base: model.Base{ID: "a"}, Title: "alpha"}},
+	}
+	got := SortSeriesCards(cards, "title", "asc", nil)
+	if got[0].Key != "a" || got[1].Key != "b" {
+		t.Fatalf("series order = %q, %q", got[0].Key, got[1].Key)
+	}
+}

internal/service/media_versions_test.go

@@ -281,7 +281,8 @@ func TestListMediaVisibleGroupedPaginatesAfterVersionGrouping(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos)
+	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos).
+		SetRuntimeCache(NewRuntimeCacheService(&config.Config{}, zap.NewNop()))
 	page, total, err := svc.ListMediaVisibleGrouped(t.Context(), lib.ID, 1, 1, MediaVisibility{IncludeNSFW: true})
 	if err != nil {
 		t.Fatal(err)
@@ -295,6 +296,17 @@ func TestListMediaVisibleGroupedPaginatesAfterVersionGrouping(t *testing.T) {
 	if page[0].Media.Path != rows[0].Path {
 		t.Fatalf("primary version = %q, want %q", page[0].Media.Path, rows[0].Path)
 	}
+	cacheKey := svc.groupedItemsCacheKey(lib.ID, []string{lib.ID}, repository.MediaQueryFilter{IncludeNSFW: true})
+	if _, ok := svc.cache.GetObject(cacheKey); !ok {
+		t.Fatal("expected grouped media items to be cached after the first page request")
+	}
+	secondPage, secondTotal, err := svc.ListMediaVisibleGrouped(t.Context(), lib.ID, 2, 1, MediaVisibility{IncludeNSFW: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if secondTotal != total || len(secondPage) != 1 || secondPage[0].Media.Path != rows[2].Path {
+		t.Fatalf("cached second page = %#v, total = %d; want Matrix item and total %d", secondPage, secondTotal, total)
+	}
 }
 
 func TestSearchMediaVisiblePageGroupedPaginatesAfterVersionGrouping(t *testing.T) {

internal/service/playback.go

@@ -41,24 +41,62 @@ func (p *PlaybackService) SetEmbyRemote(remote *EmbyRemoteService) *PlaybackServ
 
 // ─── History ────────────────────────────────────────────────────────────────
 
-// RecordProgress upserts the resume position for a (user, media) pair. A
-// position within 30 seconds of the duration auto-flags the item as
-// completed so the home page can hide it from "Continue Watching".
+// ProgressUpdate is a playback-progress report. SessionID, SessionStartedAtMs
+// and Sequence are optional for compatibility with legacy callers.
+type ProgressUpdate struct {
+	UserID             string
+	MediaID            string
+	PositionMs         int64
+	DurationMs         int64
+	SessionID          string
+	SessionStartedAtMs int64
+	Sequence           int64
+}
+
+// RecordProgress records an unversioned progress report. It is retained for
+// older callers that do not provide playback-session metadata.
 func (p *PlaybackService) RecordProgress(ctx context.Context, userID, mediaID string, position, duration int64) error {
-	if userID == "" || mediaID == "" {
-		return errors.New("missing user or media")
-	}
-	dur := p.resolvePlaybackDuration(ctx, userID, mediaID, duration)
-	completed := dur > 0 && position >= dur-30_000
-	h := &model.PlaybackHistory{
+	return p.RecordProgressUpdate(ctx, ProgressUpdate{
 		UserID:     userID,
 		MediaID:    mediaID,
 		PositionMs: position,
-		DurationMs: dur,
-		WatchedAt:  time.Now(),
-		Completed:  completed,
+		DurationMs: duration,
+	})
+}
+
+// RecordProgressUpdate upserts the resume position for a (user, media) pair.
+// When session metadata is present, stale reports are ignored so a delayed
+// request cannot overwrite a newer position or completion state.
+func (p *PlaybackService) RecordProgressUpdate(ctx context.Context, update ProgressUpdate) error {
+	if update.UserID == "" || update.MediaID == "" {
+		return errors.New("missing user or media")
 	}
-	return p.repo.History.Upsert(ctx, h)
+	dur := p.resolvePlaybackDuration(ctx, update.UserID, update.MediaID, update.DurationMs)
+	h := &model.PlaybackHistory{
+		UserID:             update.UserID,
+		MediaID:            update.MediaID,
+		PositionMs:         update.PositionMs,
+		DurationMs:         dur,
+		WatchedAt:          time.Now(),
+		Completed:          playbackProgressCompleted(update.PositionMs, dur),
+		SessionID:          update.SessionID,
+		SessionStartedAtMs: update.SessionStartedAtMs,
+		Sequence:           update.Sequence,
+	}
+	return p.repo.History.UpsertProgress(ctx, h)
+}
+
+// playbackProgressCompleted deliberately requires a positive position. For
+// very short clips the 90% threshold avoids marking a zero-second sample as
+// finished; otherwise the last 30 seconds are treated as completed.
+func playbackProgressCompleted(position, duration int64) bool {
+	if position <= 0 || duration <= 0 {
+		return false
+	}
+	if duration <= 30_000 {
+		return position*10 >= duration*9
+	}
+	return position >= duration-30_000
 }
 
 // GetProgress returns the saved resume row for one media item, or nil when absent.

internal/service/playback_test.go

@@ -91,3 +91,25 @@ func TestListFavouritesIncludesLocalAndRemoteIDs(t *testing.T) {
 		t.Fatalf("expected local favourite first by created_at desc, got %#v", items[0])
 	}
 }
+
+func TestPlaybackProgressCompletedThreshold(t *testing.T) {
+	tests := []struct {
+		name     string
+		position int64
+		duration int64
+		want     bool
+	}{
+		{name: "zero duration", position: 10_000, duration: 0, want: false},
+		{name: "short clip early", position: 10_000, duration: 20_000, want: false},
+		{name: "short clip near end", position: 18_000, duration: 20_000, want: true},
+		{name: "movie before final window", position: 80_000, duration: 120_000, want: false},
+		{name: "movie in final window", position: 95_000, duration: 120_000, want: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := playbackProgressCompleted(tt.position, tt.duration); got != tt.want {
+				t.Fatalf("playbackProgressCompleted(%d, %d) = %t, want %t", tt.position, tt.duration, got, tt.want)
+			}
+		})
+	}
+}

internal/service/runtime_cache.go

@@ -3,6 +3,7 @@ package service
 import (
 	"context"
 	"encoding/json"
+	"reflect"
 	"strings"
 	"sync"
 	"time"
@@ -13,20 +14,32 @@ import (
 	"github.com/truewhile/MeBox/internal/config"
 )
 
+const (
+	defaultRuntimeCacheEntryLimit     = 2048
+	runtimeCacheEntryOverheadBytes    = 96
+	runtimeCacheMapEntryOverheadBytes = 64
+	runtimeCacheStringHeaderBytes     = 16
+	runtimeCacheEstimateMaxDepth      = 64
+)
+
 type RuntimeCacheService struct {
 	log    *zap.Logger
 	client *redis.Client
 	prefix string
 
-	mu     sync.RWMutex
-	memory map[string]runtimeCacheItem
-	obj    map[string]runtimeObjectItem
-	limit  int
+	mu        sync.RWMutex
+	memory    map[string]runtimeCacheItem
+	obj       map[string]runtimeObjectItem
+	limit     int
+	maxBytes  int64
+	bytesUsed int64
 }
 
 type runtimeCacheItem struct {
 	raw       []byte
 	expiresAt time.Time
+	lastUsed  time.Time
+	size      int64
 }
 
 // runtimeObjectItem 直存 Go 对象，跳过 JSON 编解码。热点路径（整库行、
@@ -37,10 +50,22 @@ type runtimeCacheItem struct {
 type runtimeObjectItem struct {
 	value     any
 	expiresAt time.Time
+	lastUsed  time.Time
+	size      int64
 }
 
 func NewRuntimeCacheService(cfg *config.Config, log *zap.Logger) *RuntimeCacheService {
-	c := &RuntimeCacheService{log: log, memory: map[string]runtimeCacheItem{}, obj: map[string]runtimeObjectItem{}, limit: 2048}
+	maxBytes := int64(config.DefaultCacheMemoryMaxSizeMB) * 1024 * 1024
+	if cfg != nil && cfg.Cache.MemoryMaxSizeMB > 0 {
+		maxBytes = int64(cfg.Cache.MemoryMaxSizeMB) * 1024 * 1024
+	}
+	c := &RuntimeCacheService{
+		log:      log,
+		memory:   map[string]runtimeCacheItem{},
+		obj:      map[string]runtimeObjectItem{},
+		limit:    defaultRuntimeCacheEntryLimit,
+		maxBytes: maxBytes,
+	}
 	if cfg == nil {
 		return c
 	}
@@ -101,7 +126,7 @@ func (c *RuntimeCacheService) GetJSON(ctx context.Context, key string, out any)
 			if json.Unmarshal(raw, out) != nil {
 				return false
 			}
-			c.setMemory(fullKey, raw, 2*time.Second)
+			c.setMemoryOwned(fullKey, raw, 2*time.Second)
 			return true
 		}
 	}
@@ -117,7 +142,7 @@ func (c *RuntimeCacheService) SetJSON(ctx context.Context, key string, value any
 		return
 	}
 	fullKey := c.key(key)
-	c.setMemory(fullKey, raw, ttl)
+	c.setMemoryOwned(fullKey, raw, ttl)
 	if c.client != nil {
 		_ = c.client.Set(ctx, fullKey, raw, ttl).Err()
 	}
@@ -130,41 +155,70 @@ func (c *RuntimeCacheService) GetObject(key string) (any, bool) {
 	}
 	fullKey := c.key(key)
 	now := time.Now()
-	c.mu.RLock()
+	c.mu.Lock()
 	item, ok := c.obj[fullKey]
-	c.mu.RUnlock()
 	if !ok {
-		return nil, false
-	}
-	if now.After(item.expiresAt) {
-		c.mu.Lock()
-		delete(c.obj, fullKey)
 		c.mu.Unlock()
 		return nil, false
 	}
+	if !now.Before(item.expiresAt) {
+		c.removeObjectLocked(fullKey)
+		c.mu.Unlock()
+		return nil, false
+	}
+	item.lastUsed = now
+	c.obj[fullKey] = item
+	c.mu.Unlock()
 	return item.value, true
 }
 
-// SetObject 存入一个此后视为不可变的对象。
+// SetObject 存入一个此后视为不可变的对象。对象会按估算内存计入进程内缓存
+// 总预算；单个对象超过预算时不会进入缓存，避免一次大列表请求再次打爆内存。
 func (c *RuntimeCacheService) SetObject(key string, value any, ttl time.Duration) {
 	if !c.Enabled() || strings.TrimSpace(key) == "" || value == nil || ttl <= 0 {
 		return
 	}
 	fullKey := c.key(key)
+	size := estimateRuntimeCacheObjectSize(fullKey, value)
 	now := time.Now()
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	if len(c.obj) >= c.limit {
-		for k, item := range c.obj {
-			if now.After(item.expiresAt) || len(c.obj) >= c.limit {
-				delete(c.obj, k)
-			}
-			if len(c.obj) < c.limit {
-				break
-			}
+	if size <= 0 || size > c.maxBytes {
+		return
+	}
+	c.removeObjectLocked(fullKey)
+	if !c.makeRoomLocked(now, size) {
+		return
+	}
+	c.obj[fullKey] = runtimeObjectItem{
+		value:     value,
+		expiresAt: now.Add(ttl),
+		lastUsed:  now,
+		size:      size,
+	}
+	c.bytesUsed += size
+}
+
+// SetMaxSizeMB 热更新进程内缓存总预算。降低上限时会立即淘汰最久未使用的
+// 条目；传 0 或负数时恢复默认预算。
+func (c *RuntimeCacheService) SetMaxSizeMB(maxMB int) {
+	if c == nil {
+		return
+	}
+	if maxMB <= 0 {
+		maxMB = config.DefaultCacheMemoryMaxSizeMB
+	}
+	maxBytes := int64(maxMB) * 1024 * 1024
+	now := time.Now()
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.maxBytes = maxBytes
+	c.evictExpiredLocked(now)
+	for c.bytesUsed > c.maxBytes {
+		if !c.evictOldestLocked() {
+			break
 		}
 	}
-	c.obj[fullKey] = runtimeObjectItem{value: value, expiresAt: now.Add(ttl)}
 }
 
 func (c *RuntimeCacheService) DeletePrefix(ctx context.Context, prefix string) {
@@ -202,39 +256,145 @@ func (c *RuntimeCacheService) key(key string) string {
 
 func (c *RuntimeCacheService) getMemory(key string) ([]byte, bool) {
 	now := time.Now()
-	c.mu.RLock()
+	c.mu.Lock()
+	defer c.mu.Unlock()
 	item, ok := c.memory[key]
-	c.mu.RUnlock()
 	if !ok {
 		return nil, false
 	}
-	if now.After(item.expiresAt) {
-		c.mu.Lock()
-		delete(c.memory, key)
-		c.mu.Unlock()
+	if !now.Before(item.expiresAt) {
+		c.removeMemoryLocked(key)
 		return nil, false
 	}
+	item.lastUsed = now
+	c.memory[key] = item
 	return item.raw, true
 }
 
 func (c *RuntimeCacheService) setMemory(key string, raw []byte, ttl time.Duration) {
+	c.setMemoryBytes(key, raw, ttl, false)
+}
+
+func (c *RuntimeCacheService) setMemoryOwned(key string, raw []byte, ttl time.Duration) {
+	c.setMemoryBytes(key, raw, ttl, true)
+}
+
+func (c *RuntimeCacheService) setMemoryBytes(key string, raw []byte, ttl time.Duration, owned bool) {
 	if ttl <= 0 || len(raw) == 0 {
 		return
 	}
+	size := int64(len(key)+len(raw)) + runtimeCacheEntryOverheadBytes
+	now := time.Now()
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	if len(c.memory) >= c.limit {
-		now := time.Now()
-		for k, item := range c.memory {
-			if now.After(item.expiresAt) || len(c.memory) >= c.limit {
-				delete(c.memory, k)
-			}
-			if len(c.memory) < c.limit {
-				break
-			}
+	if size <= 0 || size > c.maxBytes {
+		return
+	}
+	c.removeMemoryLocked(key)
+	if !c.makeRoomLocked(now, size) {
+		return
+	}
+	if !owned {
+		raw = append([]byte(nil), raw...)
+	}
+	c.memory[key] = runtimeCacheItem{
+		raw:       raw,
+		expiresAt: now.Add(ttl),
+		lastUsed:  now,
+		size:      size,
+	}
+	c.bytesUsed += size
+}
+
+func (c *RuntimeCacheService) makeRoomLocked(now time.Time, incoming int64) bool {
+	if incoming <= 0 {
+		incoming = 1
+	}
+	if c.limit <= 0 {
+		c.limit = defaultRuntimeCacheEntryLimit
+	}
+	if c.maxBytes <= 0 {
+		c.maxBytes = int64(config.DefaultCacheMemoryMaxSizeMB) * 1024 * 1024
+	}
+	if incoming > c.maxBytes {
+		return false
+	}
+	c.evictExpiredLocked(now)
+	for c.entryCountLocked() >= c.limit || c.bytesUsed+incoming > c.maxBytes {
+		if !c.evictOldestLocked() {
+			return false
 		}
 	}
-	c.memory[key] = runtimeCacheItem{raw: append([]byte(nil), raw...), expiresAt: time.Now().Add(ttl)}
+	return true
+}
+
+func (c *RuntimeCacheService) entryCountLocked() int {
+	return len(c.memory) + len(c.obj)
+}
+
+func (c *RuntimeCacheService) evictExpiredLocked(now time.Time) {
+	for key, item := range c.memory {
+		if !now.Before(item.expiresAt) {
+			c.removeMemoryLocked(key)
+		}
+	}
+	for key, item := range c.obj {
+		if !now.Before(item.expiresAt) {
+			c.removeObjectLocked(key)
+		}
+	}
+}
+
+func (c *RuntimeCacheService) evictOldestLocked() bool {
+	var (
+		oldestKey  string
+		oldestKind byte
+		oldestAt   time.Time
+	)
+	for key, item := range c.memory {
+		if oldestKind == 0 || item.lastUsed.Before(oldestAt) {
+			oldestKey, oldestKind, oldestAt = key, 'm', item.lastUsed
+		}
+	}
+	for key, item := range c.obj {
+		if oldestKind == 0 || item.lastUsed.Before(oldestAt) {
+			oldestKey, oldestKind, oldestAt = key, 'o', item.lastUsed
+		}
+	}
+	switch oldestKind {
+	case 'm':
+		c.removeMemoryLocked(oldestKey)
+		return true
+	case 'o':
+		c.removeObjectLocked(oldestKey)
+		return true
+	default:
+		return false
+	}
+}
+
+func (c *RuntimeCacheService) removeMemoryLocked(key string) {
+	item, ok := c.memory[key]
+	if !ok {
+		return
+	}
+	delete(c.memory, key)
+	c.bytesUsed -= item.size
+	if c.bytesUsed < 0 {
+		c.bytesUsed = 0
+	}
+}
+
+func (c *RuntimeCacheService) removeObjectLocked(key string) {
+	item, ok := c.obj[key]
+	if !ok {
+		return
+	}
+	delete(c.obj, key)
+	c.bytesUsed -= item.size
+	if c.bytesUsed < 0 {
+		c.bytesUsed = 0
+	}
 }
 
 func (c *RuntimeCacheService) deleteMemoryPrefix(prefix string) {
@@ -242,12 +402,137 @@ func (c *RuntimeCacheService) deleteMemoryPrefix(prefix string) {
 	defer c.mu.Unlock()
 	for key := range c.memory {
 		if strings.HasPrefix(key, prefix) {
-			delete(c.memory, key)
+			c.removeMemoryLocked(key)
 		}
 	}
 	for key := range c.obj {
 		if strings.HasPrefix(key, prefix) {
-			delete(c.obj, key)
+			c.removeObjectLocked(key)
 		}
 	}
 }
+
+type runtimeCacheVisit struct {
+	kind reflect.Kind
+	ptr  uintptr
+}
+
+func estimateRuntimeCacheObjectSize(key string, value any) int64 {
+	seen := make(map[runtimeCacheVisit]struct{})
+	size := int64(len(key)) + runtimeCacheEntryOverheadBytes
+	size += estimateRuntimeCacheReflectSize(reflect.ValueOf(value), seen, 0)
+	return size
+}
+
+func estimateRuntimeCacheReflectSize(v reflect.Value, seen map[runtimeCacheVisit]struct{}, depth int) int64 {
+	if !v.IsValid() || depth > runtimeCacheEstimateMaxDepth {
+		return 0
+	}
+	switch v.Kind() {
+	case reflect.Interface:
+		if v.IsNil() {
+			return 0
+		}
+		return estimateRuntimeCacheReflectSize(v.Elem(), seen, depth+1)
+	case reflect.Pointer:
+		if v.IsNil() || markRuntimeCacheVisit(v, seen) {
+			return 0
+		}
+		return int64(v.Type().Elem().Size()) + estimateRuntimeCacheNestedSize(v.Elem(), seen, depth+1)
+	case reflect.String:
+		return int64(len(v.String())) + runtimeCacheStringHeaderBytes
+	case reflect.Slice:
+		if v.IsNil() || markRuntimeCacheVisit(v, seen) {
+			return 0
+		}
+		total := int64(v.Type().Size()) + int64(v.Cap())*int64(v.Type().Elem().Size())
+		for i := 0; i < v.Len(); i++ {
+			total += estimateRuntimeCacheNestedSize(v.Index(i), seen, depth+1)
+		}
+		return total
+	case reflect.Map:
+		if v.IsNil() || markRuntimeCacheVisit(v, seen) {
+			return 0
+		}
+		total := int64(v.Type().Size()) + int64(v.Len())*runtimeCacheMapEntryOverheadBytes
+		iter := v.MapRange()
+		for iter.Next() {
+			total += estimateRuntimeCacheNestedSize(iter.Key(), seen, depth+1)
+			total += estimateRuntimeCacheNestedSize(iter.Value(), seen, depth+1)
+		}
+		return total
+	case reflect.Struct:
+		total := int64(v.Type().Size())
+		for i := 0; i < v.NumField(); i++ {
+			total += estimateRuntimeCacheNestedSize(v.Field(i), seen, depth+1)
+		}
+		return total
+	case reflect.Array:
+		total := int64(v.Type().Size())
+		for i := 0; i < v.Len(); i++ {
+			total += estimateRuntimeCacheNestedSize(v.Index(i), seen, depth+1)
+		}
+		return total
+	default:
+		return int64(v.Type().Size())
+	}
+}
+
+func estimateRuntimeCacheNestedSize(v reflect.Value, seen map[runtimeCacheVisit]struct{}, depth int) int64 {
+	if !v.IsValid() || depth > runtimeCacheEstimateMaxDepth {
+		return 0
+	}
+	switch v.Kind() {
+	case reflect.Interface, reflect.Pointer:
+		return estimateRuntimeCacheReflectSize(v, seen, depth+1)
+	case reflect.String:
+		return int64(len(v.String()))
+	case reflect.Slice:
+		if v.IsNil() || markRuntimeCacheVisit(v, seen) {
+			return 0
+		}
+		total := int64(v.Cap()) * int64(v.Type().Elem().Size())
+		for i := 0; i < v.Len(); i++ {
+			total += estimateRuntimeCacheNestedSize(v.Index(i), seen, depth+1)
+		}
+		return total
+	case reflect.Map:
+		if v.IsNil() || markRuntimeCacheVisit(v, seen) {
+			return 0
+		}
+		total := int64(v.Len()) * runtimeCacheMapEntryOverheadBytes
+		iter := v.MapRange()
+		for iter.Next() {
+			total += estimateRuntimeCacheNestedSize(iter.Key(), seen, depth+1)
+			total += estimateRuntimeCacheNestedSize(iter.Value(), seen, depth+1)
+		}
+		return total
+	case reflect.Struct:
+		total := int64(0)
+		for i := 0; i < v.NumField(); i++ {
+			total += estimateRuntimeCacheNestedSize(v.Field(i), seen, depth+1)
+		}
+		return total
+	case reflect.Array:
+		total := int64(0)
+		for i := 0; i < v.Len(); i++ {
+			total += estimateRuntimeCacheNestedSize(v.Index(i), seen, depth+1)
+		}
+		return total
+	default:
+		return 0
+	}
+}
+
+func markRuntimeCacheVisit(v reflect.Value, seen map[runtimeCacheVisit]struct{}) bool {
+	ptr := v.Pointer()
+	if ptr == 0 {
+		return false
+	}
+	visit := runtimeCacheVisit{kind: v.Kind(), ptr: ptr}
+	if _, ok := seen[visit]; ok {
+		return true
+	}
+	seen[visit] = struct{}{}
+	return false
+}

internal/service/runtime_cache_test.go

@@ -0,0 +1,118 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+)
+
+func newRuntimeCacheForTest(t *testing.T, maxMB int) *RuntimeCacheService {
+	t.Helper()
+	cfg := &config.Config{}
+	cfg.Cache.MemoryMaxSizeMB = maxMB
+	return NewRuntimeCacheService(cfg, zap.NewNop())
+}
+
+func TestRuntimeCacheEvictsByByteBudget(t *testing.T) {
+	cache := newRuntimeCacheForTest(t, 1)
+	cache.SetObject("large", strings.Repeat("a", 800<<10), time.Minute)
+	cache.SetObject("small", strings.Repeat("b", 300<<10), time.Minute)
+
+	if cache.bytesUsed > cache.maxBytes {
+		t.Fatalf("cache bytes=%d exceeds max=%d", cache.bytesUsed, cache.maxBytes)
+	}
+	if _, ok := cache.GetObject("large"); ok {
+		t.Fatal("expected oldest large entry to be evicted")
+	}
+	if _, ok := cache.GetObject("small"); !ok {
+		t.Fatal("expected newest small entry to remain cached")
+	}
+}
+
+func TestRuntimeCacheSkipsOversizedObject(t *testing.T) {
+	cache := newRuntimeCacheForTest(t, 1)
+	cache.SetObject("huge", strings.Repeat("x", 2<<20), time.Minute)
+
+	if _, ok := cache.GetObject("huge"); ok {
+		t.Fatal("oversized object must not be cached")
+	}
+	if cache.bytesUsed != 0 {
+		t.Fatalf("bytesUsed=%d, want 0", cache.bytesUsed)
+	}
+}
+
+func TestRuntimeCachePrefixDeleteReleasesByteBudget(t *testing.T) {
+	cache := newRuntimeCacheForTest(t, 2)
+	for i := 0; i < 4; i++ {
+		cache.SetJSON(context.Background(), fmt.Sprintf("media:%d", i), strings.Repeat("x", 64<<10), time.Minute)
+	}
+	if cache.bytesUsed == 0 {
+		t.Fatal("expected cached bytes")
+	}
+	cache.DeletePrefix(context.Background(), "media:")
+	if cache.bytesUsed != 0 {
+		t.Fatalf("bytesUsed=%d after prefix delete, want 0", cache.bytesUsed)
+	}
+	for i := 0; i < 4; i++ {
+		var out string
+		if cache.GetJSON(context.Background(), fmt.Sprintf("media:%d", i), &out) {
+			t.Fatalf("entry media:%d should have been deleted", i)
+		}
+	}
+}
+
+func TestRuntimeCacheStillEnforcesEntryLimit(t *testing.T) {
+	cache := newRuntimeCacheForTest(t, 1)
+	cache.limit = 3
+	for i := 0; i < 5; i++ {
+		cache.SetObject(fmt.Sprintf("item-%d", i), i, time.Minute)
+	}
+	if got := cache.entryCountLocked(); got != 3 {
+		t.Fatalf("entry count=%d, want 3", got)
+	}
+}
+
+func TestRuntimeCacheEstimatesMediaRows(t *testing.T) {
+	rows := []model.Media{{
+		Title:       strings.Repeat("t", 1024),
+		Path:        "/media/movies/example.mkv",
+		PosterURL:   "https://image.example/poster.jpg",
+		BackdropURL: "https://image.example/backdrop.jpg",
+		Overview:    strings.Repeat("o", 2048),
+		Genres:      "Action,Adventure",
+	}}
+	size := estimateRuntimeCacheObjectSize("media:test", rows)
+	if size < int64(len(rows[0].Title)+len(rows[0].Overview)) {
+		t.Fatalf("estimated size %d is smaller than payload", size)
+	}
+}
+
+func TestRuntimeCacheSetMaxSizeEvictsImmediately(t *testing.T) {
+	cache := newRuntimeCacheForTest(t, 2)
+	cache.SetObject("old", strings.Repeat("a", 700<<10), time.Minute)
+	cache.SetObject("new", strings.Repeat("b", 700<<10), time.Minute)
+	if cache.bytesUsed <= 1<<20 {
+		t.Fatalf("test setup bytesUsed=%d, want >1MiB", cache.bytesUsed)
+	}
+
+	cache.SetMaxSizeMB(1)
+	if cache.maxBytes != 1<<20 {
+		t.Fatalf("maxBytes=%d, want 1MiB", cache.maxBytes)
+	}
+	if cache.bytesUsed > cache.maxBytes {
+		t.Fatalf("bytesUsed=%d exceeds maxBytes=%d", cache.bytesUsed, cache.maxBytes)
+	}
+	if _, ok := cache.GetObject("old"); ok {
+		t.Fatal("oldest entry should be evicted after lowering cache limit")
+	}
+	if _, ok := cache.GetObject("new"); !ok {
+		t.Fatal("newest entry should remain after lowering cache limit")
+	}
+}

internal/service/runtime_settings.go

@@ -119,6 +119,22 @@ func ApplyRuntimeSetting(cfg *config.Config, key, value string) {
 			}
 			cfg.Cache.ImagesMaxSizeMB = n
 		}
+	case "cache.memory_max_size_mb":
+		n := config.DefaultCacheMemoryMaxSizeMB
+		if value != "" {
+			parsed, err := strconv.Atoi(value)
+			if err != nil {
+				return
+			}
+			n = parsed
+		}
+		if n <= 0 {
+			n = config.DefaultCacheMemoryMaxSizeMB
+		}
+		if n > 4096 {
+			n = 4096
+		}
+		cfg.Cache.MemoryMaxSizeMB = n
 	}
 }
 

internal/service/runtime_settings_test.go

@@ -41,3 +41,22 @@ func TestApplyRuntimeSettingTranscodeSwitches(t *testing.T) {
 		t.Fatalf("max cpu threads = %d, want clamp 1", cfg.App.MaxCPUThreads)
 	}
 }
+
+func TestApplyRuntimeSettingMemoryCacheLimit(t *testing.T) {
+	cfg := &config.Config{}
+
+	ApplyRuntimeSetting(cfg, "cache.memory_max_size_mb", "64")
+	if cfg.Cache.MemoryMaxSizeMB != 64 {
+		t.Fatalf("memory cache limit = %d, want 64", cfg.Cache.MemoryMaxSizeMB)
+	}
+
+	ApplyRuntimeSetting(cfg, "cache.memory_max_size_mb", "")
+	if cfg.Cache.MemoryMaxSizeMB != config.DefaultCacheMemoryMaxSizeMB {
+		t.Fatalf("empty value should restore default, got %d", cfg.Cache.MemoryMaxSizeMB)
+	}
+
+	ApplyRuntimeSetting(cfg, "cache.memory_max_size_mb", "99999")
+	if cfg.Cache.MemoryMaxSizeMB != 4096 {
+		t.Fatalf("memory cache limit should clamp to 4096, got %d", cfg.Cache.MemoryMaxSizeMB)
+	}
+}

internal/service/scanner_existing_media.go

@@ -8,53 +8,95 @@ import (
 	"github.com/truewhile/MeBox/internal/model"
 )
 
+// existingLocalMediaSnapshot 保留整库快照入口，主要供兼容性调用和测试使用。
+// 实际扫库路径使用 existingLocalMediaSnapshotForRoot，避免多根目录库重复持有
+// 与当前 root 无关的媒体记录。
 func (s *ScannerService) existingLocalMediaSnapshot(ctx context.Context, libraryID string) (map[string]existingLocalMedia, error) {
-	var rows []model.Media
-	if err := s.repo.DB.WithContext(ctx).
+	return s.existingLocalMediaSnapshotForRoot(ctx, libraryID, "", "")
+}
+
+// existingLocalMediaSnapshotForRoot 以流式方式读取当前 root 的已有媒体索引，
+// 不再先构造 []model.Media 再复制成 map。map 中的字符串只在最终索引中保留一份，
+// 可以显著降低大库扫描时的峰值内存。
+func (s *ScannerService) existingLocalMediaSnapshotForRoot(ctx context.Context, libraryID, rootID, rootPath string) (map[string]existingLocalMedia, error) {
+	if s == nil || s.repo == nil || s.repo.DB == nil {
+		return map[string]existingLocalMedia{}, nil
+	}
+	libraryID = strings.TrimSpace(libraryID)
+	rootID = strings.TrimSpace(rootID)
+	rootPath = strings.TrimSpace(rootPath)
+	query := s.repo.DB.WithContext(ctx).
 		Model(&model.Media{}).
+		Where("library_id = ? AND path NOT LIKE ?", libraryID, "cloud://%")
+	if rootID != "" {
+		// 兼容尚未回填 library_root_id 的旧数据；没有 root id 的行再由路径归属过滤。
+		query = query.Where("(library_root_id = ? OR library_root_id = '' OR library_root_id IS NULL)", rootID)
+	}
+	rows, err := query.
 		Select("path", "library_root_id", "relative_path", "title", "original_name", "episode_title", "size_bytes", "duration_sec", "width", "height", "video_codec", "audio_codec", "container", "strm_url", "file_id", "poster_url", "backdrop_url", "overview", "year", "release_date", "rating", "tm_db_id", "bangumi_id", "douban_id", "thetvdb_id", "season_num", "episode_num", "genres", "countries", "languages", "nsfw", "scrape_status").
-		Where("library_id = ? AND path NOT LIKE ?", libraryID, "cloud://%").
-		Find(&rows).Error; err != nil {
+		Rows()
+	if err != nil {
 		return nil, err
 	}
-	snapshot := make(map[string]existingLocalMedia, len(rows))
-	for _, row := range rows {
-		if strings.TrimSpace(row.Path) == "" {
+	defer rows.Close()
+
+	snapshot := make(map[string]existingLocalMedia)
+	for rows.Next() {
+		var (
+			path string
+			row  existingLocalMedia
+		)
+		if err := rows.Scan(
+			&path,
+			&row.LibraryRootID,
+			&row.RelativePath,
+			&row.Title,
+			&row.OriginalName,
+			&row.EpisodeTitle,
+			&row.SizeBytes,
+			&row.DurationSec,
+			&row.Width,
+			&row.Height,
+			&row.VideoCodec,
+			&row.AudioCodec,
+			&row.Container,
+			&row.STRMURL,
+			&row.FileID,
+			&row.PosterURL,
+			&row.BackdropURL,
+			&row.Overview,
+			&row.Year,
+			&row.ReleaseDate,
+			&row.Rating,
+			&row.TMDbID,
+			&row.BangumiID,
+			&row.DoubanID,
+			&row.TheTVDBID,
+			&row.SeasonNum,
+			&row.EpisodeNum,
+			&row.Genres,
+			&row.Countries,
+			&row.Languages,
+			&row.NSFW,
+			&row.ScrapeStatus,
+		); err != nil {
+			return nil, err
+		}
+		path = strings.TrimSpace(path)
+		if path == "" {
 			continue
 		}
-		snapshot[filepath.Clean(row.Path)] = existingLocalMedia{
-			LibraryRootID: row.LibraryRootID,
-			RelativePath:  row.RelativePath,
-			Title:         row.Title,
-			OriginalName:  row.OriginalName,
-			EpisodeTitle:  row.EpisodeTitle,
-			SizeBytes:     row.SizeBytes,
-			DurationSec:   row.DurationSec,
-			Width:         row.Width,
-			Height:        row.Height,
-			VideoCodec:    row.VideoCodec,
-			AudioCodec:    row.AudioCodec,
-			Container:     row.Container,
-			STRMURL:       row.STRMURL,
-			FileID:        row.FileID,
-			PosterURL:     row.PosterURL,
-			BackdropURL:   row.BackdropURL,
-			Overview:      row.Overview,
-			Year:          row.Year,
-			ReleaseDate:   row.ReleaseDate,
-			Rating:        row.Rating,
-			TMDbID:        row.TMDbID,
-			BangumiID:     row.BangumiID,
-			DoubanID:      row.DoubanID,
-			TheTVDBID:     row.TheTVDBID,
-			SeasonNum:     row.SeasonNum,
-			EpisodeNum:    row.EpisodeNum,
-			Genres:        row.Genres,
-			Countries:     row.Countries,
-			Languages:     row.Languages,
-			NSFW:          row.NSFW,
-			ScrapeStatus:  row.ScrapeStatus,
+		if rootPath != "" {
+			if rootID == "" || strings.TrimSpace(row.LibraryRootID) == "" {
+				if !pathBelongsToRoot(path, rootPath) {
+					continue
+				}
+			}
 		}
+		snapshot[filepath.Clean(path)] = row
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
 	}
 	return snapshot, nil
 }

internal/service/scanner_existing_media_test.go

@@ -59,3 +59,34 @@ func TestExistingLocalMediaSnapshotFiltersAndCleansLocalRows(t *testing.T) {
 		t.Fatalf("identity fields not preserved: %#v", row)
 	}
 }
+
+func TestExistingLocalMediaSnapshotForRootFiltersOtherRoots(t *testing.T) {
+	db := newServiceTestDB(t, &model.Media{})
+	repos := repository.New(db)
+	scanner := NewScannerService(&config.Config{}, zap.NewNop(), repos, NewHub(zap.NewNop()), nil, nil)
+
+	root1 := t.TempDir()
+	root2 := t.TempDir()
+	path1 := filepath.Join(root1, "Root1.mkv")
+	path2 := filepath.Join(root2, "Root2.mkv")
+	if err := db.Create(&[]model.Media{
+		{LibraryID: "lib-1", LibraryRootID: "root-1", Path: path1, SizeBytes: 11},
+		{LibraryID: "lib-1", LibraryRootID: "root-2", Path: path2, SizeBytes: 22},
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := scanner.existingLocalMediaSnapshotForRoot(t.Context(), "lib-1", "root-1", root1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(got) != 1 {
+		t.Fatalf("snapshot len = %d, want 1: %#v", len(got), got)
+	}
+	if _, ok := got[filepath.Clean(path1)]; !ok {
+		t.Fatalf("root-1 media missing from %#v", got)
+	}
+	if _, ok := got[filepath.Clean(path2)]; ok {
+		t.Fatalf("root-2 media leaked into root-1 snapshot: %#v", got)
+	}
+}

internal/service/scanner_scan.go

@@ -73,11 +73,6 @@ func (s *ScannerService) scanLibrary(ctx context.Context, libraryID string, auto
 	}
 	res := &ScanResult{LibraryID: lib.ID}
 	writeBatch := newLocalMediaWriteBatch(s, ctx, res, 100)
-	existingMedia, err := s.existingLocalMediaSnapshot(ctx, lib.ID)
-	if err != nil {
-		s.log.Warn("load existing local media snapshot failed", zap.String("library_id", lib.ID), zap.Error(err))
-		existingMedia = nil
-	}
 
 	roots, err := s.localLibraryScanRoots(ctx, lib)
 	if err != nil {
@@ -109,6 +104,15 @@ func (s *ScannerService) scanLibrary(ctx context.Context, libraryID string, auto
 			}
 			continue
 		}
+		existingMedia, snapshotErr := s.existingLocalMediaSnapshotForRoot(ctx, lib.ID, root.ID, root.Path)
+		if snapshotErr != nil {
+			s.log.Warn("load existing local media snapshot failed",
+				zap.String("library_id", lib.ID),
+				zap.String("root_id", root.ID),
+				zap.String("path", root.Path),
+				zap.Error(snapshotErr))
+			existingMedia = nil
+		}
 		seen, walkErr := s.scanLocalLibraryFiles(ctx, lib, &root, existingMedia, writeBatch, res)
 		if walkErr != nil {
 			addScanError(res, root.Path, walkErr)
@@ -147,9 +151,13 @@ func (s *ScannerService) scanLocalLibraryRoot(ctx context.Context, lib *model.Li
 		return res, err
 	}
 	writeBatch := newLocalMediaWriteBatch(s, ctx, res, 100)
-	existingMedia, err := s.existingLocalMediaSnapshot(ctx, lib.ID)
+	existingMedia, err := s.existingLocalMediaSnapshotForRoot(ctx, lib.ID, root.ID, root.Path)
 	if err != nil {
-		s.log.Warn("load existing local media snapshot failed", zap.String("library_id", lib.ID), zap.Error(err))
+		s.log.Warn("load existing local media snapshot failed",
+			zap.String("library_id", lib.ID),
+			zap.String("root_id", root.ID),
+			zap.String("path", root.Path),
+			zap.Error(err))
 		existingMedia = nil
 	}
 	seen, walkErr := s.scanLocalLibraryFiles(ctx, lib, root, existingMedia, writeBatch, res)

web/public/artwork-cache-sw.js

@@ -102,11 +102,21 @@ async function deleteOldArtworkVariants(cache, currentRequest) {
 }
 
 function artworkIdentity(url) {
+  // 尺寸/质量属于同一源图的不同派生资源，必须参与身份计算；
+  // 否则 400px 卡片图会删掉 1600px Hero 图的缓存。
+  const variant = ['maxWidth', 'maxHeight', 'quality']
+    .map((key) => {
+      const value = url.searchParams.get(key)
+      return value ? `${key}=${value}` : ''
+    })
+    .filter(Boolean)
+    .join('&')
+  const variantSuffix = variant ? `&${variant}` : ''
   if (url.pathname === '/api/img') {
-    return `${url.origin}${url.pathname}?url=${url.searchParams.get('url') || ''}`
+    return `${url.origin}${url.pathname}?url=${url.searchParams.get('url') || ''}${variantSuffix}`
   }
   if (url.pathname.startsWith('/api/cloud/play/')) {
-    return `${url.origin}${url.pathname}?ref=${url.searchParams.get('ref') || ''}`
+    return `${url.origin}${url.pathname}?ref=${url.searchParams.get('ref') || ''}${variantSuffix}`
   }
   return ''
 }

web/src/App.tsx

@@ -1,10 +1,10 @@
-import { Component, Suspense, type ErrorInfo, type ReactNode } from 'react'
+import { Component, Suspense, lazy, type ErrorInfo, type ReactNode } from 'react'
 import { Navigate, Route, Routes } from 'react-router-dom'
 
 import { appRoutes, type AppRoute } from './appRoutes'
 import { Layout } from './components/Layout'
 import { RequireAdmin, RequireAuth } from './components/RequireAuth'
-import { LoginPage } from './pages/LoginPage'
+const LoginPage = lazy(() => import('./pages/LoginPage').then((m) => ({ default: m.LoginPage })))
 
 const Loading = () => <p className="px-6 py-8 text-sand-500">加载中…</p>
 

web/src/api/client.ts

@@ -174,6 +174,35 @@ export function stopHLSJob(mediaId: string): void {
   }).catch(() => undefined)
 }
 
+// postPlaybackProgressKeepalive sends the final playback position without
+// relying on an axios request surviving page navigation or tab close.
+export function postPlaybackProgressKeepalive(payload: {
+  media_id: string
+  position_ms: number
+  duration_ms: number
+  session_id?: string
+  session_started_at_ms?: number
+  sequence?: number
+}): void {
+  const headers: Record<string, string> = { 'Content-Type': 'application/json' }
+  const token = useAuthStore.getState().token
+  if (token) headers.Authorization = `Bearer ${token}`
+  const activeProfileId = getActivePlayProfileId()
+  if (activeProfileId) {
+    headers['X-Play-Profile-ID'] = activeProfileId
+    const pinToken = getActivePlayProfilePinToken()
+    if (pinToken) headers['X-Play-Profile-PIN-Token'] = pinToken
+  }
+  void fetch('/api/history', {
+    method: 'POST',
+    credentials: 'same-origin',
+    keepalive: true,
+    cache: 'no-store',
+    headers,
+    body: JSON.stringify(payload),
+  }).catch(() => undefined)
+}
+
 // imageURL converts a remote poster URL into a same-origin proxy URL so it
 // can never be blocked by CORS / GFW. Empty strings pass through unchanged.
 export type ImageURLOptions =
@@ -181,22 +210,36 @@ export type ImageURLOptions =
   | {
       refreshCache?: boolean
       retryFailed?: boolean
+      maxWidth?: number
+      maxHeight?: number
+      quality?: number
     }
 
 export function imageURL(remote?: string, version?: string, options: ImageURLOptions = false): string {
   if (!remote) return ''
   const versionQuery = version ? `v=${encodeURIComponent(version)}` : ''
-  const retryFailed = typeof options === 'boolean' ? options : Boolean(options.retryFailed)
-  const refreshCache = typeof options === 'boolean' ? false : Boolean(options.refreshCache)
+  const opts: Exclude<ImageURLOptions, boolean> = typeof options === 'boolean' ? {} : options
+  const retryFailed = typeof options === 'boolean' ? options : Boolean(opts.retryFailed)
+  const refreshCache = typeof options === 'boolean' ? false : Boolean(opts.refreshCache)
   const retryQuery = retryFailed ? 'retry=1' : ''
   const refreshQuery = refreshCache ? 'refresh=1' : ''
-  const imageQuery = [versionQuery, retryQuery, refreshQuery].filter(Boolean).join('&')
+  const resizeQuery = [
+    positiveDimensionQuery('maxWidth', opts.maxWidth),
+    positiveDimensionQuery('maxHeight', opts.maxHeight),
+    positiveDimensionQuery('quality', opts.quality, 100),
+  ].filter(Boolean).join('&')
+  const imageQuery = [versionQuery, retryQuery, refreshQuery, resizeQuery].filter(Boolean).join('&')
   if (remote.startsWith('/api/img')) return withQuery(withoutAuthQuery(remote), imageQuery)
   if (remote.startsWith('/api/cloud/play/')) return withQuery(withoutAuthQuery(remote), imageQuery)
   if (remote.startsWith('/api/')) return withQuery(withQuery(remote, tokenQuery()), imageQuery)
   return withQuery(`/api/img?url=${encodeURIComponent(remote)}`, imageQuery)
 }
 
+function positiveDimensionQuery(name: string, value?: number, max = 10_000): string {
+  if (!Number.isFinite(value) || !value || value <= 0) return ''
+  return `${name}=${Math.min(Math.round(value), max)}`
+}
+
 function withQuery(url: string, query: string): string {
   if (!query) return url
   return `${url}${url.includes('?') ? '&' : '?'}${query}`

web/src/api/library.ts

@@ -105,6 +105,7 @@ export const libraryAPI = {
       .get<LibraryWithPreview[]>('/libraries', {
         params: {
           with_preview: 1,
+          include_total: 0,
           preview_limit: previewLimit,
           ids: ids.join(','),
         },
@@ -160,22 +161,34 @@ export const libraryAPI = {
   scrape: (id: string, options?: ScrapeOptions) =>
     api.post(`/libraries/${id}/scrape`, options ?? null, { timeout: BATCH_REQUEST_TIMEOUT }).then((r) => r.data),
 
-  listMedia: (id: string, page = 1, pageSize = 50, options?: { groupVersions?: boolean }) =>
+  listMedia: (
+    id: string,
+    page = 1,
+    pageSize = 50,
+    options?: { groupVersions?: boolean; sort?: string; order?: 'asc' | 'desc' },
+  ) =>
     api
       .get<MediaPage>(`/libraries/${id}/media`, {
         params: {
           page,
           page_size: pageSize,
           group_versions: options?.groupVersions === false ? 0 : undefined,
+          sort: options?.sort,
+          order: options?.order,
         },
         timeout: LONG_REQUEST_TIMEOUT,
       })
       .then((r) => r.data),
 
-  listSeries: (id: string, page = 1, pageSize = 500) =>
+  listSeries: (
+    id: string,
+    page = 1,
+    pageSize = 500,
+    options?: { sort?: string; order?: 'asc' | 'desc' },
+  ) =>
     api
       .get<SeriesPage>(`/libraries/${id}/series`, {
-        params: { page, page_size: pageSize },
+        params: { page, page_size: pageSize, sort: options?.sort, order: options?.order },
         timeout: LONG_REQUEST_TIMEOUT,
       })
       .then((r) => r.data),

web/src/api/playback.ts

@@ -27,6 +27,15 @@ export interface ExternalPlayer {
   url: string
 }
 
+export interface PlaybackProgressRequest {
+  media_id: string
+  position_ms: number
+  duration_ms: number
+  session_id?: string
+  session_started_at_ms?: number
+  sequence?: number
+}
+
 function publicOriginHeader() {
   if (typeof window === 'undefined' || !window.location?.origin) return undefined
   return { 'X-MeBox-Public-Origin': window.location.origin }
@@ -38,14 +47,8 @@ export const playbackAPI = {
       .get<{ position_ms: number; duration_ms: number; completed: boolean }>(`/playback/${mediaId}/resume`)
       .then((r) => r.data),
 
-  recordProgress: (mediaId: string, positionMs: number, durationMs: number) =>
-    api
-      .post('/history', {
-        media_id: mediaId,
-        position_ms: positionMs,
-        duration_ms: durationMs,
-      })
-      .then((r) => r.data),
+  recordProgress: (payload: PlaybackProgressRequest) =>
+    api.post('/history', payload).then((r) => r.data),
 
   recentHistory: () =>
     api.get<{ items: HistoryItem[] }>('/history').then((r) => r.data.items),

web/src/appRoutes.tsx

@@ -47,17 +47,29 @@ const ScraperQueuePage = lazy(() => import('./pages/ScraperQueuePage').then((m)
 const TaskQueuePage = lazy(() => import('./pages/TaskQueuePage').then((m) => ({ default: m.TaskQueuePage })))
 
 // 常用页面的路由 chunk 空闲预取：应用加载完成后浏览器一空闲就把浏览路径
-// （库列表/库详情/媒体详情/播放/收藏/历史等）的 chunk 拉下来，
+// （库列表/库详情/媒体详情/收藏/历史等）的 chunk 拉下来，
 // 首次点击进入时不再出现"加载中…"等 chunk 下载。失败静默（导航时会重试）。
 let prefetchStarted = false
 export function prefetchCommonRouteChunks() {
   if (prefetchStarted || typeof window === 'undefined') return
+
+  // 弱网/省流模式不做空闲预取：首屏预览和海报加载优先占用带宽。
+  const connection = (navigator as Navigator & {
+    connection?: { saveData?: boolean; effectiveType?: string }
+  }).connection
+  if (
+    connection?.saveData ||
+    connection?.effectiveType === 'slow-2g' ||
+    connection?.effectiveType === '2g'
+  ) {
+    return
+  }
+
   prefetchStarted = true
   const loaders = [
     LibrariesPageLoader,
     LibraryPageLoader,
     MediaDetailPageLoader,
-    PlayerPageLoader,
     FavouritesPageLoader,
     WatchHistoryPageLoader,
     PlaylistsPageLoader,
@@ -68,9 +80,9 @@ export function prefetchCommonRouteChunks() {
     }
   }
   if (typeof requestIdleCallback !== 'undefined') {
-    requestIdleCallback(run, { timeout: 5000 })
+    requestIdleCallback(run, { timeout: 8000 })
   } else {
-    window.setTimeout(run, 2000)
+    window.setTimeout(run, 2500)
   }
 }
 

web/src/components/LayoutHeaderSections.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useLayoutEffect, useRef, useState } from 'react'
+import { useCallback, useEffect, useLayoutEffect, useRef, useState } from 'react'
 import { createPortal } from 'react-dom'
 import { Link, useLocation, useNavigate } from 'react-router-dom'
 import { ArrowLeft, Film, LoaderCircle, Menu, Search, Star, X } from 'lucide-react'
@@ -132,12 +132,12 @@ function LayoutHeaderSearch() {
   const locationKey = `${location.pathname}${location.search}`
   const prevLocationKeyRef = useRef(locationKey)
 
-  const setSearchOpen = (open: boolean) => {
+  const setSearchOpen = useCallback((open: boolean) => {
     isOpenRef.current = open
     setIsOpen(open)
-  }
+  }, [])
 
-  const dismissSearch = (clearQuery: boolean) => {
+  const dismissSearch = useCallback((clearQuery: boolean) => {
     suppressInputRef.current = true
     setSearchOpen(false)
     if (clearQuery) {
@@ -156,9 +156,11 @@ function LayoutHeaderSearch() {
     window.setTimeout(() => {
       suppressInputRef.current = false
     }, 0)
-  }
+  }, [setSearchOpen])
   const dismissSearchRef = useRef(dismissSearch)
-  dismissSearchRef.current = dismissSearch
+  useEffect(() => {
+    dismissSearchRef.current = dismissSearch
+  }, [dismissSearch])
 
   useEffect(() => {
     const trimmed = query.trim()

web/src/components/LayoutSections.tsx

@@ -1,5 +1,4 @@
 import { Outlet } from 'react-router-dom'
-import { AnimatePresence, motion } from 'framer-motion'
 import clsx from 'clsx'
 
 import { LayoutSidebarContent, type LayoutSidebarContentProps } from './LayoutSidebarContent'
@@ -50,29 +49,18 @@ export function LayoutDesktopSidebar({ children, isSidebarOpen }: LayoutSidebarP
 }
 
 export function LayoutMobileSidebar({ children, isOpen, onClose }: LayoutMobileSidebarProps) {
+  if (!isOpen) return null
+
   return (
-    <AnimatePresence>
-      {isOpen && (
-        <div className="fixed inset-0 z-50 flex lg:hidden">
-          <motion.div
-            initial={{ opacity: 0 }}
-            animate={{ opacity: 1 }}
-            exit={{ opacity: 0 }}
-            onClick={onClose}
-            className="fixed inset-0 bg-black/15 backdrop-blur-sm"
-          />
-          <motion.div
-            initial={{ x: '-100%' }}
-            animate={{ x: 0 }}
-            exit={{ x: '-100%' }}
-            transition={{ type: 'spring', damping: 25, stiffness: 220 }}
-            className="relative z-10 flex h-full min-h-0 w-64 max-w-xs flex-col overflow-hidden shadow-xl"
-          >
-            {children}
-          </motion.div>
-        </div>
-      )}
-    </AnimatePresence>
+    <div className="fixed inset-0 z-50 flex lg:hidden">
+      <div
+        onClick={onClose}
+        className="fixed inset-0 bg-black/15 backdrop-blur-sm animate-overlay-in"
+      />
+      <div className="relative z-10 flex h-full min-h-0 w-64 max-w-xs flex-col overflow-hidden shadow-xl animate-drawer-in">
+        {children}
+      </div>
+    </div>
   )
 }
 
@@ -139,19 +127,11 @@ export function LayoutWorkspace({ routeKey, showMobileBottomNav = false }: Layou
   return (
     <main id="app-main-scroll" className={clsx('flex-1 overflow-y-auto [overflow-anchor:none] px-4 py-6 md:px-8 md:py-10', bottomPad)}>
       <div className="max-w-7xl mx-auto">
-        <AnimatePresence mode="wait">
-          <motion.div
-            key={routeKey}
-            initial={{ opacity: 0, y: 12 }}
-            animate={{ opacity: 1, y: 0 }}
-            exit={{ opacity: 0, y: -6 }}
-            transition={{ duration: 0.25, ease: 'easeOut' }}
-          >
-            <RouteErrorBoundary>
-              <Outlet />
-            </RouteErrorBoundary>
-          </motion.div>
-        </AnimatePresence>
+        <div key={routeKey} className="animate-page-in">
+          <RouteErrorBoundary>
+            <Outlet />
+          </RouteErrorBoundary>
+        </div>
       </div>
     </main>
   )

web/src/components/LayoutSidebarContent.tsx

@@ -1,5 +1,4 @@
 import { Link } from 'react-router-dom'
-import { motion } from 'framer-motion'
 import { ArrowLeft, Menu, X } from 'lucide-react'
 import clsx from 'clsx'
 
@@ -77,13 +76,9 @@ function LayoutSidebarHeader({
           className="h-10 w-10 shrink-0 rounded-xl object-contain shadow-sm"
         />
         {sidebarExpanded && (
-          <motion.span
-            initial={{ opacity: 0, x: -10 }}
-            animate={{ opacity: 1, x: 0 }}
-            className="font-display text-lg font-extrabold tracking-tight text-[var(--app-text)]"
-          >
+          <span className="font-display text-lg font-extrabold tracking-tight text-[var(--app-text)] animate-fade-slide-in">
             MeBox
-          </motion.span>
+          </span>
         )}
       </Link>
       <SidebarIconButton className="hidden lg:block" onClick={onToggleSidebar}>

web/src/components/LayoutSidebarNav.tsx

@@ -1,6 +1,5 @@
 import type { ReactNode } from 'react'
 import { Link, useLocation } from 'react-router-dom'
-import { AnimatePresence, motion } from 'framer-motion'
 import { ChevronDown } from 'lucide-react'
 import clsx from 'clsx'
 
@@ -52,21 +51,13 @@ export function SidebarGroup({ id, icon, label, children, collapsed, open, activ
           </div>
         )}
       </button>
-      <AnimatePresence initial={false}>
-        {!collapsed && open && (
-          <motion.div
-            initial={{ height: 0, opacity: 0 }}
-            animate={{ height: 'auto', opacity: 1 }}
-            exit={{ height: 0, opacity: 0 }}
-            transition={{ duration: 0.18, ease: 'easeOut' }}
-            className="overflow-hidden"
-          >
-            <div className="space-y-1 pb-1 pl-3">
-              {children}
-            </div>
-          </motion.div>
-        )}
-      </AnimatePresence>
+      {!collapsed && open && (
+        <div className="overflow-hidden animate-accordion-in">
+          <div className="space-y-1 pb-1 pl-3">
+            {children}
+          </div>
+        </div>
+      )}
     </div>
   )
 }
@@ -103,13 +94,9 @@ export function SidebarLink({ to, icon, label, end, collapsed, child }: SidebarL
         {icon}
       </span>
       {!collapsed && (
-        <motion.span
-          initial={{ opacity: 0, x: -5 }}
-          animate={{ opacity: 1, x: 0 }}
-          className="truncate whitespace-nowrap"
-        >
+        <span className="truncate whitespace-nowrap">
           {label}
-        </motion.span>
+        </span>
       )}
       {collapsed && (
         <div className="pointer-events-none absolute left-full z-50 ml-3 whitespace-nowrap rounded-xl bg-[var(--app-tooltip-bg)] px-2.5 py-1.5 text-xs font-semibold text-[var(--app-tooltip-text)] opacity-0 shadow-lg transition-opacity group-hover:pointer-events-auto group-hover:opacity-100">

web/src/components/LayoutUserMenu.tsx

@@ -1,7 +1,6 @@
 import { useCallback, useEffect, useLayoutEffect, useRef, useState, type ReactNode } from 'react'
 import { createPortal } from 'react-dom'
 import { Link, useLocation } from 'react-router-dom'
-import { AnimatePresence, motion } from 'framer-motion'
 import { Cast, ChevronDown, Clock, Heart, ListMusic, LogOut, Settings, Tv, UserCog } from 'lucide-react'
 import clsx from 'clsx'
 
@@ -103,26 +102,18 @@ export function LayoutUserMenu({
 
   const menuPortal = isOpen && menuPosition && typeof document !== 'undefined'
     ? createPortal(
-        <AnimatePresence>
-          <motion.div
+        <>
+          <div
             key="layout-user-menu-backdrop"
-            initial={{ opacity: 0 }}
-            animate={{ opacity: 1 }}
-            exit={{ opacity: 0 }}
-            transition={{ duration: 0.12 }}
-            className="fixed inset-0 z-[120]"
+            className="fixed inset-0 z-[120] animate-overlay-in"
             aria-hidden="true"
             onPointerDown={onClose}
           />
-          <motion.div
+          <div
             key="layout-user-menu-panel"
-            initial={{ opacity: 0, y: 10, scale: 0.95 }}
-            animate={{ opacity: 1, y: 0, scale: 1 }}
-            exit={{ opacity: 0, y: 10, scale: 0.95 }}
-            transition={{ duration: 0.15 }}
             role="menu"
             style={{ top: menuPosition.top, right: menuPosition.right }}
-            className="fixed z-[121] w-56 origin-top-right rounded-2xl border border-[var(--app-border)] bg-[var(--app-panel)] p-2 shadow-xl"
+            className="fixed z-[121] w-56 origin-top-right rounded-2xl border border-[var(--app-border)] bg-[var(--app-panel)] p-2 shadow-xl animate-menu-in"
             onPointerDown={(event) => event.stopPropagation()}
           >
 	            <UserMenuLink to="/profile" icon={<Settings size={16} />} label="设置" onNavigate={onClose} />
@@ -191,8 +182,8 @@ export function LayoutUserMenu({
               <LogOut size={16} />
               <span>安全登出系统</span>
             </button>
-          </motion.div>
-        </AnimatePresence>,
+          </div>
+        </>,
         document.body,
       )
     : null

web/src/components/MediaCard.tsx

@@ -1,4 +1,4 @@
-import { memo, useEffect, useRef, useState, type ReactNode } from 'react'
+import { memo, useEffect, useRef, useState, type ReactNode } from 'react'
 import { Link } from 'react-router-dom'
 import { Film, Play, Layers, Star } from 'lucide-react'
 import { imageURL } from '../api/client'
@@ -22,7 +22,12 @@ export const MediaCard = memo(function MediaCard({
   const ref = useRef<HTMLDivElement>(null)
   const href = linkTo ?? `/media/${media.id}`
   const [posterFit, setPosterFit] = useState<'cover' | 'contain'>('cover')
-  const posterSrc = imageURL(media.poster_url, media.updated_at)
+  const posterSrc = imageURL(media.poster_url, media.updated_at, {
+    maxWidth: compact ? 320 : 480,
+    maxHeight: compact ? 480 : 600,
+    quality: 82,
+  })
+  const blurredPosterSrc = imageURL(media.poster_url, media.updated_at, { maxWidth: 160, quality: 60 })
   const displayRating = rating ?? media.rating
   const versionCount = media.versions?.length ?? 0
   // renderActions 延迟到卡片自身渲染时才调用，保证 memo 生效
@@ -43,7 +48,7 @@ export const MediaCard = memo(function MediaCard({
             <>
               {posterFit === 'contain' && (
                 <img
-                  src={posterSrc}
+                  src={blurredPosterSrc}
                   alt=""
                   aria-hidden="true"
                   loading="lazy"

web/src/hooks/useInViewOnce.ts

@@ -0,0 +1,44 @@
+import { useEffect, useRef, type RefObject } from 'react'
+
+const DEFAULT_ROOT_MARGIN = '480px 0px'
+
+/**
+ * 元素首次进入滚动容器附近时触发一次。用于媒体库预览的按需加载。
+ */
+export function useInViewOnce<T extends Element>(
+  onVisible: () => void,
+  rootMargin = DEFAULT_ROOT_MARGIN,
+): RefObject<T> {
+  const ref = useRef<T>(null)
+  const callbackRef = useRef(onVisible)
+
+  useEffect(() => {
+    callbackRef.current = onVisible
+  }, [onVisible])
+
+  useEffect(() => {
+    const element = ref.current
+    if (!element) return
+
+    if (typeof IntersectionObserver === 'undefined') {
+      callbackRef.current()
+      return
+    }
+
+    const root = document.getElementById('app-main-scroll')
+    let fired = false
+    const observer = new IntersectionObserver(
+      (entries) => {
+        if (fired || !entries.some((entry) => entry.isIntersecting)) return
+        fired = true
+        observer.disconnect()
+        callbackRef.current()
+      },
+      { root, rootMargin, threshold: 0.01 },
+    )
+    observer.observe(element)
+    return () => observer.disconnect()
+  }, [rootMargin])
+
+  return ref
+}

web/src/hooks/useLazyPreviewBatch.ts

@@ -0,0 +1,40 @@
+import { useCallback, useEffect, useRef } from 'react'
+
+/**
+ * 合并短时间内进入视口的预览请求，避免每个卡片各发一次 HTTP 请求。
+ * 回调放在 ref 中，调用方每次渲染传新的闭包也不会重建定时器。
+ */
+export function useLazyPreviewBatch(
+  onNeedPreviews?: (ids: string[]) => void,
+  delayMs = 48,
+) {
+  const pendingRef = useRef<Set<string>>(new Set())
+  const timerRef = useRef<number | null>(null)
+  const callbackRef = useRef(onNeedPreviews)
+
+  useEffect(() => {
+    callbackRef.current = onNeedPreviews
+  }, [onNeedPreviews])
+
+  useEffect(() => {
+    return () => {
+      if (timerRef.current !== null) {
+        window.clearTimeout(timerRef.current)
+      }
+    }
+  }, [])
+
+  return useCallback((id: string) => {
+    if (!id || !callbackRef.current) return
+    pendingRef.current.add(id)
+    if (timerRef.current !== null) return
+    timerRef.current = window.setTimeout(() => {
+      timerRef.current = null
+      const ids = Array.from(pendingRef.current)
+      pendingRef.current.clear()
+      if (ids.length > 0) {
+        callbackRef.current?.(ids)
+      }
+    }, delayMs)
+  }, [delayMs])
+}

web/src/index.css

@@ -418,3 +418,42 @@ video::cue(*) {
     0 0 8px rgba(0, 0, 0, 0.8),
     0 0 16px rgba(0, 0, 0, 0.6) !important;
 }
+
+
+/* ── Entrance animations (replaces framer-motion on the critical shell) ── */
+@keyframes overlay-in { from { opacity: 0; } to { opacity: 1; } }
+@keyframes drawer-in { from { transform: translateX(-100%); } to { transform: translateX(0); } }
+@keyframes page-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
+@keyframes accordion-in { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
+@keyframes fade-slide-in { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: translateX(0); } }
+@keyframes menu-in { from { opacity: 0; transform: translateY(10px) scale(0.95); } to { opacity: 1; transform: translateY(0) scale(1); } }
+
+.animate-overlay-in { animation: overlay-in 0.15s ease-out both; }
+.animate-drawer-in { animation: drawer-in 0.22s ease-out both; }
+.animate-page-in { animation: page-in 0.25s ease-out both; }
+.animate-accordion-in { animation: accordion-in 0.18s ease-out both; }
+.animate-fade-slide-in { animation: fade-slide-in 0.2s ease-out both; }
+.animate-menu-in { animation: menu-in 0.15s ease-out both; }
+
+@media (prefers-reduced-motion: reduce) {
+  .animate-overlay-in,
+  .animate-drawer-in,
+  .animate-page-in,
+  .animate-accordion-in,
+  .animate-fade-slide-in,
+  .animate-menu-in { animation: none !important; }
+}
+
+
+@keyframes pulse-soft { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }
+@keyframes hero-in { from { opacity: 0; transform: scale(1.08); } to { opacity: 0.38; transform: scale(1.02); } }
+@keyframes title-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
+.animate-pulse-soft { animation: pulse-soft 1.5s ease-in-out infinite; }
+.animate-hero-in { animation: hero-in 0.8s ease-out both; }
+.animate-title-in { animation: title-in 0.3s ease-out both; }
+
+@media (prefers-reduced-motion: reduce) {
+  .animate-pulse-soft,
+  .animate-hero-in,
+  .animate-title-in { animation: none !important; }
+}

web/src/pages/HomePage.tsx

@@ -18,6 +18,7 @@ import {
   HomeLoadingState,
 } from './HomePageSections'
 
+const PREVIEW_BATCH_SIZE = 4
 const hasArtwork = (media?: Media | null) => !!(media?.poster_url || media?.backdrop_url)
 
 export function HomePage() {
@@ -86,48 +87,72 @@ export function HomePage() {
 
   const sortedLibraries = useMemo(() => sortByPinnedIds(libraries, pinnedIds), [libraries, pinnedIds])
 
-  // 按需拉取卡片预览管理
-  const fetchedLibIdsRef = useRef<Set<string>>(new Set())
-  const fetchingRef = useRef<Set<string>>(new Set())
+  // 按需拉取卡片预览管理。同一个库可能先以 4 张封面用于入口网格，
+  // 稍后需要 10 张用于内容横排，因此缓存的是已加载数量而不是简单布尔值。
+  const fetchedPreviewLimitsRef = useRef<Map<string, number>>(new Map())
+  const fetchingPreviewLimitsRef = useRef<Map<string, number>>(new Map())
 
-  const fetchPreviews = useCallback(async (ids: string[]) => {
-    const targets = ids.filter((id) => !fetchedLibIdsRef.current.has(id) && !fetchingRef.current.has(id))
+  const fetchPreviews = useCallback(async (ids: string[], limit = 10) => {
+    const uniqueIDs = Array.from(new Set(ids.filter(Boolean)))
+    const targets = uniqueIDs.filter(
+      (id) =>
+        (fetchedPreviewLimitsRef.current.get(id) ?? 0) < limit &&
+        (fetchingPreviewLimitsRef.current.get(id) ?? 0) < limit,
+    )
     if (targets.length === 0) return
-    targets.forEach((id) => fetchingRef.current.add(id))
+    targets.forEach((id) => fetchingPreviewLimitsRef.current.set(id, limit))
 
-    try {
-      const rows = await libraryAPI.listPreviews(targets, 10)
-      setLibraryData((prev) => {
-        const next = { ...prev }
-        for (const row of rows) {
-          next[row.id] = {
-            cards: row.cards ?? [],
-            items: [],
-            total: row.total ?? 0,
-          }
-        }
-        return next
-      })
-    } catch {
-      // 容错
-    } finally {
-      targets.forEach((id) => {
-        fetchedLibIdsRef.current.add(id)
-        fetchingRef.current.delete(id)
-      })
+    const batches: string[][] = []
+    for (let i = 0; i < targets.length; i += PREVIEW_BATCH_SIZE) {
+      batches.push(targets.slice(i, i + PREVIEW_BATCH_SIZE))
     }
+
+    // 分批并发：一个慢库不再阻塞整页预览，先返回的批次立即渲染。
+    await Promise.allSettled(
+      batches.map(async (batch) => {
+        let loaded = false
+        try {
+          const rows = await libraryAPI.listPreviews(batch, limit)
+          loaded = true
+          setLibraryData((prev) => {
+            const next = { ...prev }
+            for (const row of rows) {
+              next[row.id] = {
+                cards: row.cards ?? [],
+                items: [],
+                total: row.total ?? 0,
+              }
+            }
+            return next
+          })
+        } catch {
+          // 单个批次失败不影响其他批次；导航回来时会重试。
+        } finally {
+          batch.forEach((id) => {
+            if (loaded) {
+              fetchedPreviewLimitsRef.current.set(
+                id,
+                Math.max(fetchedPreviewLimitsRef.current.get(id) ?? 0, limit),
+              )
+            }
+            if (fetchingPreviewLimitsRef.current.get(id) === limit) {
+              fetchingPreviewLimitsRef.current.delete(id)
+            }
+          })
+        }
+      }),
+    )
   }, [])
 
-  // 3. 首屏优先加载：轮播图库 + 媒体库卡片区前 20 个库 + 首屏前 3 个内容行
+  // 3. 首屏只预取轮播和前三行所需的预览；入口卡片进入视口后再按批加载。
   useEffect(() => {
     if (sortedLibraries.length === 0) return
     const carouselLibIds = sortedLibraries
       .filter((l) => l.carousel_enabled === true)
       .map((l) => l.id)
-    const topGridLibIds = sortedLibraries.slice(0, 20).map((l) => l.id)
     const topRowLibIds = sortedLibraries.slice(0, 3).map((l) => l.id)
-    const initialTargets = Array.from(new Set([...carouselLibIds, ...topGridLibIds, ...topRowLibIds]))
-    void fetchPreviews(initialTargets)
+    const initialTargets = Array.from(new Set([...carouselLibIds, ...topRowLibIds]))
+    void fetchPreviews(initialTargets, 10)
   }, [sortedLibraries, fetchPreviews])
 
   // 4. 媒体库展示行渐进流式加载：默认先检视前 3 个库，随向下滚动逐步检视后续库
@@ -140,7 +165,7 @@ export function HomePage() {
   useEffect(() => {
     if (sortedLibraries.length === 0) return
     const currentTargets = sortedLibraries.slice(0, visibleTargetCount).map((l) => l.id)
-    void fetchPreviews(currentTargets)
+    void fetchPreviews(currentTargets, 10)
   }, [sortedLibraries, visibleTargetCount, fetchPreviews])
 
   // 当前已拉取并确认有内容的媒体库行
@@ -214,7 +239,7 @@ export function HomePage() {
   const libraryCounts = useMemo(() => {
     const counts: Record<string, number> = {}
     for (const lib of libraries) {
-      counts[lib.id] = libraryData[lib.id]?.total ?? 0
+      counts[lib.id] = lib.total ?? libraryData[lib.id]?.total ?? 0
     }
     return counts
   }, [libraries, libraryData])

web/src/pages/HomePageSections.tsx

@@ -1,6 +1,5 @@
 import { useEffect, useMemo, useRef, useState, type ReactNode } from 'react'
 import { Link } from 'react-router-dom'
-import { AnimatePresence, motion } from 'framer-motion'
 import {
   ArrowRight,
   ChevronLeft,
@@ -18,6 +17,8 @@ import {
 } from 'lucide-react'
 
 import { imageURL } from '../api/client'
+import { useInViewOnce } from '../hooks/useInViewOnce'
+import { useLazyPreviewBatch } from '../hooks/useLazyPreviewBatch'
 import { MediaCard } from '../components/MediaCard'
 import type { HistoryItem } from '../api/playback'
 import type { Library, Media } from '../types'
@@ -37,7 +38,6 @@ const TYPE_ICONS: Record<string, ReactNode> = {
   music: <Music size={18} />,
   adult: <Film size={18} />,
 }
-
 const TYPE_LABELS: Record<string, string> = {
   movie: '电影',
   movies: '电影',
@@ -53,11 +53,7 @@ const TYPE_LABELS: Record<string, string> = {
 export function HomeLoadingState() {
   return (
     <div className="flex items-center justify-center py-48">
-      <motion.div
-        animate={{ opacity: [0.4, 1, 0.4] }}
-        transition={{ repeat: Infinity, duration: 1.5 }}
-        className="flex flex-col items-center gap-4"
-      >
+      <div className="flex flex-col items-center gap-4 animate-pulse-soft">
         <div className="relative flex items-center justify-center">
           <div className="h-10 w-10 animate-spin rounded-full border-2 border-[var(--app-border)] border-t-[var(--app-active-bg)]" />
           <Film className="absolute h-4 w-4 text-brand-500" />
@@ -65,7 +61,7 @@ export function HomeLoadingState() {
         <span className="text-sm font-semibold uppercase tracking-widest text-[var(--app-muted)]">
           首页内容准备中…
         </span>
-      </motion.div>
+      </div>
     </div>
   )
 }
@@ -170,24 +166,20 @@ export function HomeCarouselSection({
       {/* Background Backdrop Image with Crossfade */}
       <div className="absolute inset-0 z-0">
         <div className="theme-hero-bg h-full w-full" />
-        <AnimatePresence mode="wait">
-          {visual && (
-            <motion.img
-              key={visual + currentItem.id}
-              initial={{ opacity: 0, scale: 1.08 }}
-              animate={{ opacity: 0.38, scale: 1.02 }}
-              exit={{ opacity: 0 }}
-              transition={{ duration: 0.8, ease: 'easeOut' }}
-              src={imageURL(visual, currentItem.updated_at)}
-              alt=""
-              className="absolute inset-0 h-full w-full object-cover object-center blur-[1px]"
-              referrerPolicy="no-referrer"
-              onError={(e) => {
-                e.currentTarget.style.display = 'none'
-              }}
-            />
-          )}
-        </AnimatePresence>
+        {visual && (
+          <img
+            key={visual + currentItem.id}
+            src={imageURL(visual, currentItem.updated_at, { maxWidth: 1920, maxHeight: 1080, quality: 78 })}
+            alt=""
+            fetchPriority="high"
+            decoding="async"
+            className="absolute inset-0 h-full w-full object-cover object-center blur-[1px] animate-hero-in"
+            referrerPolicy="no-referrer"
+            onError={(e) => {
+              e.currentTarget.style.display = 'none'
+            }}
+          />
+        )}
         <div className="theme-hero-overlay absolute inset-0" />
         <div className="theme-hero-fade absolute inset-x-0 bottom-0 h-36" />
       </div>
@@ -212,18 +204,12 @@ export function HomeCarouselSection({
 
           {/* Title */}
           <div className="space-y-2">
-            <AnimatePresence mode="wait">
-              <motion.h1
-                key={currentItem.title + currentItem.id}
-                initial={{ opacity: 0, y: 8 }}
-                animate={{ opacity: 1, y: 0 }}
-                exit={{ opacity: 0, y: -6 }}
-                transition={{ duration: 0.3 }}
-                className="font-display text-2xl font-extrabold leading-tight tracking-tight text-[var(--app-text)] sm:text-3xl md:text-4xl lg:text-5xl"
-              >
-                {currentItem.title}
-              </motion.h1>
-            </AnimatePresence>
+            <h1
+              key={currentItem.title + currentItem.id}
+              className="font-display text-2xl font-extrabold leading-tight tracking-tight text-[var(--app-text)] sm:text-3xl md:text-4xl lg:text-5xl animate-title-in"
+            >
+              {currentItem.title}
+            </h1>
             {currentItem.original_name && currentItem.original_name !== currentItem.title && (
               <p className="text-xs font-semibold text-[var(--app-muted)] tracking-wide">
                 {currentItem.original_name}
@@ -295,8 +281,10 @@ export function HomeCarouselSection({
             </div>
             {poster && (
               <img
-                src={imageURL(poster, currentItem.updated_at)}
+                src={imageURL(poster, currentItem.updated_at, { maxWidth: 560, quality: 84 })}
                 alt={currentItem.title}
+                fetchPriority="high"
+                decoding="async"
                 className="absolute inset-2 h-[calc(100%-1rem)] w-[calc(100%-1rem)] rounded-[1.25rem] object-cover"
                 referrerPolicy="no-referrer"
                 onError={(e) => {
@@ -377,17 +365,13 @@ export function HomeLibrariesSection({
   const [currentPage, setCurrentPage] = useState(1)
   const totalPages = Math.max(1, Math.ceil(libraries.length / PAGE_SIZE))
   const effectivePage = Math.min(currentPage, totalPages)
+  const queuePreview = useLazyPreviewBatch(onNeedPreviews)
 
   const pagedLibraries = useMemo<Library[]>(() => {
     const start = (effectivePage - 1) * PAGE_SIZE
     return libraries.slice(start, start + PAGE_SIZE)
   }, [libraries, effectivePage])
 
-  useEffect(() => {
-    const ids = pagedLibraries.map((l) => l.id)
-    onNeedPreviews?.(ids)
-  }, [pagedLibraries, onNeedPreviews])
-
   return (
     <section className="space-y-4">
       <div className="flex flex-wrap items-center justify-between gap-3 border-b border-[var(--app-border)] pb-3">
@@ -449,72 +433,91 @@ export function HomeLibrariesSection({
         </div>
       </div>
 
-      {/* Libraries Grid */}
       <div className="grid grid-cols-2 gap-4 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-5 2xl:grid-cols-6">
-        {pagedLibraries.map((lib) => {
-          const count = libraryCounts[lib.id] ?? 0
-          const cards = libraryData?.[lib.id]?.cards || []
-          const artwork = getLibraryArtworks(lib, cards)
-
-          return (
-            <Link
-              key={lib.id}
-              to={`/library/${lib.id}`}
-              className="group relative flex flex-col justify-between overflow-hidden rounded-2xl border border-[var(--app-border)] bg-[var(--app-panel)] p-3 transition-all duration-300 hover:-translate-y-1 hover:border-brand-500/50 hover:bg-[var(--app-hover)]/40 hover:shadow-lg hover:shadow-brand-500/10"
-              title={lib.name}
-            >
-              {/* 封面图片展示区：和媒体库页面一样，显示设置好的或生成的图片 */}
-              <div
-                className={`relative h-28 w-full overflow-hidden rounded-xl bg-[linear-gradient(135deg,var(--app-panel-soft),var(--app-panel))] shadow-inner ${
-                  artwork.length > 1 ? 'grid grid-cols-2 gap-0.5' : ''
-                }`}
-              >
-                {artwork.length > 0 ? (
-                  artwork.map(({ src, version }, index) => (
-                    <img
-                      key={`${src}-${index}`}
-                      src={imageURL(src, version)}
-                      alt=""
-                      loading="lazy"
-                      referrerPolicy="no-referrer"
-                      className="h-full w-full object-cover transition-transform duration-500 group-hover:scale-105"
-                      onError={(event) => {
-                        event.currentTarget.style.visibility = 'hidden'
-                      }}
-                    />
-                  ))
-                ) : (
-                  <div className="flex h-full w-full items-center justify-center text-brand-500">
-                    {TYPE_ICONS[lib.type] || <FolderOpen size={28} />}
-                  </div>
-                )}
-
-                {/* 浮动类型标签 */}
-                <div className="absolute top-2 right-2 rounded-lg border border-white/20 bg-black/60 px-2 py-0.5 text-[10px] font-bold text-white backdrop-blur-md shadow-sm">
-                  {TYPE_LABELS[lib.type] || '自定义'}
-                </div>
-              </div>
-
-              {/* 媒体库信息 */}
-              <div className="mt-3 flex flex-col justify-between">
-                <h3
-                  className="line-clamp-2 break-words font-display text-sm font-bold text-[var(--app-text)] group-hover:text-brand-500"
-                  title={lib.name}
-                >
-                  {lib.name}
-                </h3>
-                <p className="mt-0.5 text-xs text-[var(--app-muted)]">
-                  {count > 0 ? `${count} 部媒体` : '暂无条目'}
-                </p>
-              </div>
-            </Link>
-          )
-        })}
+        {pagedLibraries.map((lib) => (
+          <HomeLibraryCard
+            key={lib.id}
+            library={lib}
+            count={libraryCounts[lib.id] ?? 0}
+            cards={libraryData?.[lib.id]?.cards ?? []}
+            onVisible={() => {
+              if (!lib.cover_url) {
+                queuePreview(lib.id)
+              }
+            }}
+          />
+        ))}
       </div>
     </section>
   )
 }
 
+function HomeLibraryCard({
+  library,
+  count,
+  cards,
+  onVisible,
+}: {
+  library: Library
+  count: number
+  cards: SeriesCard[]
+  onVisible: () => void
+}) {
+  const ref = useInViewOnce<HTMLAnchorElement>(onVisible)
+  const artwork = getLibraryArtworks(library, cards)
+
+  return (
+    <Link
+      ref={ref}
+      to={`/library/${library.id}`}
+      className="group relative flex flex-col justify-between overflow-hidden rounded-2xl border border-[var(--app-border)] bg-[var(--app-panel)] p-3 transition-all duration-300 hover:-translate-y-1 hover:border-brand-500/50 hover:bg-[var(--app-hover)]/40 hover:shadow-lg hover:shadow-brand-500/10"
+      title={library.name}
+    >
+      <div
+        className={`relative h-28 w-full overflow-hidden rounded-xl bg-[linear-gradient(135deg,var(--app-panel-soft),var(--app-panel))] shadow-inner ${
+          artwork.length > 1 ? 'grid grid-cols-2 gap-0.5' : ''
+        }`}
+      >
+        {artwork.length > 0 ? (
+          artwork.map(({ src, version }, index) => (
+            <img
+              key={`${src}-${index}`}
+              src={imageURL(src, version, { maxWidth: 480, maxHeight: 320, quality: 78 })}
+              alt=""
+              loading="lazy"
+              referrerPolicy="no-referrer"
+              className="h-full w-full object-cover transition-transform duration-500 group-hover:scale-105"
+              onError={(event) => {
+                event.currentTarget.style.visibility = 'hidden'
+              }}
+            />
+          ))
+        ) : (
+          <div className="flex h-full w-full items-center justify-center text-brand-500">
+            {TYPE_ICONS[library.type] || <FolderOpen size={28} />}
+          </div>
+        )}
+
+        <div className="absolute top-2 right-2 rounded-lg border border-white/20 bg-black/60 px-2 py-0.5 text-[10px] font-bold text-white backdrop-blur-md shadow-sm">
+          {TYPE_LABELS[library.type] || '自定义'}
+        </div>
+      </div>
+
+      <div className="mt-3 flex flex-col justify-between">
+        <h3
+          className="line-clamp-2 break-words font-display text-sm font-bold text-[var(--app-text)] group-hover:text-brand-500"
+          title={library.name}
+        >
+          {library.name}
+        </h3>
+        <p className="mt-0.5 text-xs text-[var(--app-muted)]">
+          {count > 0 ? `${count} 部媒体` : '暂无条目'}
+        </p>
+      </div>
+    </Link>
+  )
+}
+
 /* =========================================================================
    3. 单个媒体库内容行 (Horizontal Scroll Row)
    ========================================================================= */
@@ -694,7 +697,7 @@ function ContinueCard({ media, progress }: { media: Media; progress: number }) {
       <div className="relative h-20 w-14 shrink-0 overflow-hidden rounded-xl bg-[var(--app-panel-soft)]">
         {media.poster_url ? (
           <img
-            src={imageURL(media.poster_url, media.updated_at)}
+            src={imageURL(media.poster_url, media.updated_at, { maxWidth: 180, maxHeight: 240, quality: 78 })}
             alt=""
             className="h-full w-full object-cover transition-transform duration-500 group-hover:scale-105"
             loading="lazy"

web/src/pages/LibrariesPage.tsx

@@ -33,8 +33,10 @@ export function LibrariesPage() {
     if (targets.length === 0) return
     targets.forEach((id) => fetchingRef.current.add(id))
 
+    let loaded = false
     try {
       const rows = await libraryAPI.listPreviews(targets, 10)
+      loaded = true
       setLibraryData((prev) => {
         const next = { ...prev }
         for (const row of rows) {
@@ -49,7 +51,9 @@ export function LibrariesPage() {
       // 容错
     } finally {
       targets.forEach((id) => {
-        fetchedLibIdsRef.current.add(id)
+        if (loaded) {
+          fetchedLibIdsRef.current.add(id)
+        }
         fetchingRef.current.delete(id)
       })
     }
@@ -68,13 +72,10 @@ export function LibrariesPage() {
     try {
       const libs = await fetchLibraries()
       setLibraries(libs)
-      // 优先拉取入口卡片网格当前页（前 20 个库）的预览
-      const topIds = libs.slice(0, 20).map((l) => l.id)
-      void fetchPreviews(topIds)
     } finally {
       setLoading(false)
     }
-  }, [fetchPreviews])
+  }, [])
 
   async function handleRepairRescrape() {
     if (repairing) return
@@ -105,7 +106,7 @@ export function LibrariesPage() {
       return {
         library,
         items: [],
-        total: data?.total ?? 0,
+        total: library.total ?? data?.total ?? 0,
         cards: data?.cards ?? [],
       }
     })

web/src/pages/LibrariesPageSections.tsx

@@ -1,11 +1,12 @@
 import { useEffect, useMemo, useRef, useState, type ReactNode } from 'react'
 import { Link } from 'react-router-dom'
-import { motion } from 'framer-motion'
 import { ArrowRight, ChevronLeft, ChevronRight, Film, FolderOpen, Library as LibraryIcon, Music, Pin, PlayCircle, RefreshCw, Sparkles, Tv } from 'lucide-react'
 
 import { imageURL } from '../api/client'
 import { EpisodeArtworkToggle } from '../components/EpisodeArtworkToggle'
 import { MediaCard } from '../components/MediaCard'
+import { useInViewOnce } from '../hooks/useInViewOnce'
+import { useLazyPreviewBatch } from '../hooks/useLazyPreviewBatch'
 import { seriesCardLink } from '../utils/groupSeries'
 import { libraryDisplayPath } from './libraryDisplayModel'
 import { libraryArtworkItems, type LibraryPreview } from './librariesPageModel'
@@ -19,7 +20,6 @@ const TYPE_ICONS: Record<string, ReactNode> = {
   music: <Music size={18} />,
   adult: <Film size={18} />,
 }
-
 const TYPE_LABELS: Record<string, string> = {
   movie: '电影',
   tv: '剧集',
@@ -115,6 +115,7 @@ export function LibrariesContent({
   onNeedPreviews?: (ids: string[]) => void
 }) {
   const pinnedCount = previews.filter((preview) => isLibraryPinned(preview.library.id, pinnedIds)).length
+  const queuePreview = useLazyPreviewBatch(onNeedPreviews)
 
   // 下方媒体库货架支持向下滑动渐进流式加载：默认先展示前 3 个库货架，
   // 随着用户向下滑动接近底部，通过 IntersectionObserver 动态解锁后续媒体库货架。
@@ -185,15 +186,12 @@ export function LibrariesContent({
   const [entryPage, setEntryPage] = useState(1)
   const totalEntryPages = Math.max(1, Math.ceil(previews.length / ENTRY_PAGE_SIZE))
   const effectiveEntryPage = Math.min(entryPage, totalEntryPages)
+
   const pagedPreviews = useMemo<LibraryPreview[]>(() => {
     const start = (effectiveEntryPage - 1) * ENTRY_PAGE_SIZE
     return previews.slice(start, start + ENTRY_PAGE_SIZE)
   }, [previews, effectiveEntryPage])
 
-  useEffect(() => {
-    const ids = pagedPreviews.map((p) => p.library.id)
-    onNeedPreviews?.(ids)
-  }, [pagedPreviews, onNeedPreviews])
 
   return (
     <>
@@ -241,37 +239,38 @@ export function LibrariesContent({
           )}
         </div>
         <div className="grid grid-cols-1 gap-3 sm:grid-cols-2 sm:gap-4 xl:grid-cols-3">
-          {pagedPreviews.map((preview, index) => (
-            <motion.div
+          {pagedPreviews.map((preview) => (
+            <div
               key={preview.library.id}
-              initial={{ opacity: 0, y: 12 }}
-              animate={{ opacity: 1, y: 0 }}
-              transition={{ delay: index * 0.03 }}
+              className="animate-page-in"
             >
               <LibraryEntryCard
                 preview={preview}
                 pinned={isLibraryPinned(preview.library.id, pinnedIds)}
                 onTogglePin={() => onTogglePin(preview.library.id)}
+                onVisible={() => {
+                  if (!preview.library.cover_url) {
+                    queuePreview(preview.library.id)
+                  }
+                }}
               />
-            </motion.div>
+            </div>
           ))}
         </div>
       </section>
 
       {visiblePreviews.length > 0 && (
         <section className="space-y-6">
-          {visiblePreviews.map((preview, index) => (
-            <motion.div
+          {visiblePreviews.map((preview) => (
+            <div
               key={preview.library.id}
-              initial={{ opacity: 0, y: 12 }}
-              animate={{ opacity: 1, y: 0 }}
-              transition={{ delay: Math.min(index, 3) * 0.03 }}
+              className="animate-page-in"
             >
               <LibraryShelf
                 preview={preview}
                 pinned={isLibraryPinned(preview.library.id, pinnedIds)}
               />
-            </motion.div>
+            </div>
           ))}
 
           {visibleCount < previews.length && (
@@ -292,12 +291,15 @@ function LibraryEntryCard({
   preview,
   pinned,
   onTogglePin,
+  onVisible,
 }: {
   preview: LibraryPreview
   pinned: boolean
   onTogglePin: () => void
+  onVisible?: () => void
 }) {
   const library = preview.library
+  const ref = useInViewOnce<HTMLDivElement>(onVisible ?? (() => {}))
   const artwork = library.cover_url
     ? [{ src: library.cover_url, version: library.updated_at }]
     : libraryArtworkItems(preview.cards)
@@ -305,6 +307,7 @@ function LibraryEntryCard({
 
   return (
     <div
+      ref={ref}
       className={
         'group relative flex overflow-hidden rounded-2xl sm:rounded-3xl border bg-white p-2.5 sm:p-3 shadow-card transition-all hover:-translate-y-0.5 hover:shadow-card-hover ' +
         (pinned ? 'border-brand-300 ring-1 ring-brand-100' : 'border-sand-200 hover:border-brand-200')
@@ -339,7 +342,7 @@ function LibraryEntryCard({
           artwork.map(({ src, version }, index) => (
             <img
               key={`${src}-${index}`}
-              src={imageURL(src, version)}
+              src={imageURL(src, version, { maxWidth: 400, maxHeight: 300, quality: 78 })}
               alt=""
               loading="lazy"
               referrerPolicy="no-referrer"

web/src/pages/LibraryMediaSections.tsx

@@ -1,4 +1,4 @@
-import { memo, type ReactNode } from 'react'
+import { memo, useEffect, useRef, type ReactNode } from 'react'
 import { Film } from 'lucide-react'
 
 import { MediaCard } from '../components/MediaCard'
@@ -15,6 +15,9 @@ type LibraryMediaSectionsProps = {
   seriesCards: SeriesCard[]
   selectedSeries: SeriesCard | null
   loading: boolean
+  hasMore: boolean
+  loadingMore: boolean
+  onLoadMore: () => void
   cardActions: (media: Media) => ReactNode
   onSeriesClick: (series: SeriesCard) => void
 }
@@ -25,6 +28,9 @@ export function LibraryMediaSections({
   seriesCards,
   selectedSeries,
   loading,
+  hasMore,
+  loadingMore,
+  onLoadMore,
   cardActions,
   onSeriesClick,
 }: LibraryMediaSectionsProps) {
@@ -60,10 +66,58 @@ export function LibraryMediaSections({
       {isSeries && seriesCards.length === 0 && !loading && (
         <LibraryEmptyState message="该库尚未发现任何剧集，触发一次扫描后再来看看" />
       )}
+
+      <LoadMoreSentinel
+        hasMore={hasMore}
+        loadingMore={loadingMore}
+        onLoadMore={onLoadMore}
+      />
     </>
   )
 }
 
+function LoadMoreSentinel({
+  hasMore,
+  loadingMore,
+  onLoadMore,
+}: {
+  hasMore: boolean
+  loadingMore: boolean
+  onLoadMore: () => void
+}) {
+  const ref = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    const element = ref.current
+    if (!element || !hasMore) return
+    const root = document.getElementById('app-main-scroll')
+    const observer = new IntersectionObserver(
+      (entries) => {
+        if (!loadingMore && entries.some((entry) => entry.isIntersecting)) {
+          onLoadMore()
+        }
+      },
+      { root, rootMargin: '600px 0px', threshold: 0 },
+    )
+    observer.observe(element)
+    return () => observer.disconnect()
+  }, [hasMore, loadingMore, onLoadMore])
+
+  if (!hasMore) return null
+  return (
+    <div ref={ref} className="flex justify-center py-8">
+      <button
+        type="button"
+        disabled={loadingMore}
+        onClick={onLoadMore}
+        className="rounded-xl border border-[var(--app-border)] bg-[var(--app-panel)] px-4 py-2 text-sm font-bold text-[var(--app-subtle)] transition-colors hover:bg-[var(--app-hover)] hover:text-[var(--app-text)] disabled:cursor-wait disabled:opacity-60"
+      >
+        {loadingMore ? '加载中…' : '加载更多'}
+      </button>
+    </div>
+  )
+}
+
 // 独立 memo 组件：onClick 闭包在其内部创建，props 均为稳定引用，
 // 父级重渲染不会穿透到每张剧集卡片。
 const SeriesCardItem = memo(function SeriesCardItem({
@@ -99,4 +153,4 @@ function LibraryEmptyState({ message }: { message: string }) {
       <p className="text-ink-50">{message}</p>
     </div>
   )
-}
+}

web/src/pages/LibraryPage.tsx

@@ -1,8 +1,7 @@
-import { useCallback, useEffect, useMemo, useState, Fragment, type ReactNode } from 'react'
+import { useCallback, useMemo, useState, Fragment, type ReactNode } from 'react'
 import { useLocation, useParams, useSearchParams } from 'react-router-dom'
 import { motion } from 'framer-motion'
 
-import { historyAPI } from '../api/history'
 import type { Media } from '../types'
 import { useAuthStore } from '../stores/auth'
 import { isTheatricalFeature, type SeriesCard } from '../utils/groupSeries'
@@ -49,48 +48,10 @@ export function LibraryPage() {
     return (saved as SortOrder) || 'asc'
   })
   const [randomSeed, setRandomSeed] = useState(() => Date.now())
-  const [historyMap, setHistoryMap] = useState<Map<string, string>>(new Map())
-
-  useEffect(() => {
-    if (sortField !== 'last_played') return
-    let cancelled = false
-    historyAPI
-      .list(1000)
-      .then((historyItems) => {
-        if (cancelled) return
-        const map = new Map<string, string>()
-        for (const item of historyItems ?? []) {
-          if (item.media_id && item.watched_at) {
-            if (!map.has(item.media_id) || new Date(item.watched_at) > new Date(map.get(item.media_id)!)) {
-              map.set(item.media_id, item.watched_at)
-            }
-          }
-        }
-        setHistoryMap(map)
-      })
-      .catch(() => {})
-    return () => {
-      cancelled = true
-    }
-  }, [sortField])
-
-  const handleSortChange = (field: SortField, order: SortOrder) => {
-    setSortField(field)
-    setSortOrder(order)
-    if (id) {
-      localStorage.setItem(`mebox_lib_sort_field_${id}`, field)
-      localStorage.setItem(`mebox_lib_sort_order_${id}`, order)
-    }
-    localStorage.setItem('mebox_lib_sort_field', field)
-    localStorage.setItem('mebox_lib_sort_order', order)
-    if (field === 'random') {
-      setRandomSeed(Date.now())
-    }
-  }
-
-  const handleReshuffle = () => {
-    setRandomSeed(Date.now())
-  }
+  const [lastNonRandomSort, setLastNonRandomSort] = useState<SortField>(sortField === 'random' ? 'release_date' : sortField)
+  const [lastNonRandomOrder, setLastNonRandomOrder] = useState<SortOrder>(sortOrder)
+  const serverSortField = sortField === 'random' ? lastNonRandomSort : sortField
+  const serverSortOrder = sortField === 'random' ? lastNonRandomOrder : sortOrder
 
   // 剧集模式：选中某个剧集后展开详情
   const [selectedSeries, setSelectedSeries] = useState<SeriesCard | null>(null)
@@ -102,22 +63,56 @@ export function LibraryPage() {
     seriesEpisodeItems,
     total,
     loading,
+    loadingMore,
+    hasMore,
+    loadMore,
+    loadAll,
     loadingSeriesEpisodes,
     isSeriesLibrary,
     isSeries,
     seriesCards,
     loadingAllText,
     reloadCurrentLibrary,
-  } = useLibraryData(id, selectedSeries)
+  } = useLibraryData(id, selectedSeries, serverSortField, serverSortOrder)
 
-  const sortedItems = useMemo(() => {
-    return sortMediaList(items, sortField, sortOrder, randomSeed, historyMap)
-  }, [items, sortField, sortOrder, randomSeed, historyMap])
+  // 常规排序由服务端全局完成；只有 random 模式才在客户端洗牌。
+  const displayedItems = useMemo(() => {
+    return sortField === 'random' ? sortMediaList(items, 'random', sortOrder, randomSeed) : items
+  }, [items, sortField, sortOrder, randomSeed])
 
-  const sortedSeriesCards = useMemo(() => {
-    return sortSeriesList(seriesCards, sortField, sortOrder, randomSeed, historyMap)
-  }, [seriesCards, sortField, sortOrder, randomSeed, historyMap])
+  const displayedSeriesCards = useMemo(() => {
+    return sortField === 'random' ? sortSeriesList(seriesCards, 'random', sortOrder, randomSeed) : seriesCards
+  }, [seriesCards, sortField, sortOrder, randomSeed])
 
+  const handleSortChange = useCallback(async (field: SortField, order: SortOrder) => {
+    if (field === 'random') {
+      if (sortField !== 'random') {
+        setLastNonRandomSort(sortField)
+        setLastNonRandomOrder(sortOrder)
+        await loadAll()
+      }
+      setRandomSeed(Date.now())
+    } else {
+      setLastNonRandomSort(field)
+      setLastNonRandomOrder(order)
+    }
+    setSortField(field)
+    setSortOrder(order)
+    if (id) {
+      localStorage.setItem(`mebox_lib_sort_field_${id}`, field)
+      localStorage.setItem(`mebox_lib_sort_order_${id}`, order)
+    }
+    localStorage.setItem('mebox_lib_sort_field', field)
+    localStorage.setItem('mebox_lib_sort_order', order)
+  }, [id, loadAll, sortField, sortOrder])
+
+  const handleLoadMore = useCallback(() => {
+    void loadMore()
+  }, [loadMore])
+
+  const handleReshuffle = () => {
+    setRandomSeed(Date.now())
+  }
   const {
     scanning,
     scanProgress,
@@ -142,7 +137,7 @@ export function LibraryPage() {
     isSeriesLibrary,
     isSeries,
     loading,
-    seriesCards: sortedSeriesCards,
+    seriesCards: displayedSeriesCards,
     searchParams,
     setSearchParams,
     selectedSeries,
@@ -236,7 +231,7 @@ export function LibraryPage() {
       {!selectedSeries && (
         <LibraryPageHeader
           library={library}
-          itemCount={isSeries ? sortedSeriesCards.length : total}
+          itemCount={isSeries ? displayedSeriesCards.length : total}
           loadingAllText={loadingAllText}
           scanProgress={scanProgress}
           isAdmin={role === 'admin'}
@@ -257,10 +252,13 @@ export function LibraryPage() {
 
       <LibraryMediaSections
         isSeries={isSeries}
-        items={sortedItems}
-        seriesCards={sortedSeriesCards}
+        items={displayedItems}
+        seriesCards={displayedSeriesCards}
         selectedSeries={selectedSeries}
         loading={loading}
+        hasMore={hasMore}
+        loadingMore={loadingMore}
+        onLoadMore={handleLoadMore}
         cardActions={cardActions}
         onSeriesClick={handleSeriesClick}
       />

web/src/pages/PlayerPage.tsx

@@ -4,7 +4,7 @@ import type Hls from 'hls.js'
 import toast from 'react-hot-toast'
 
 import { mediaAPI, libraryAPI } from '../api/library'
-import { hlsURL, stopHLSJob, streamURL } from '../api/client'
+import { hlsURL, postPlaybackProgressKeepalive, stopHLSJob, streamURL } from '../api/client'
 import { danmakuAPI, type DanmakuAnime, type DanmakuLoadedInfo } from '../api/danmaku'
 import { playbackAPI } from '../api/playback'
 import { subtitlesAPI, type SubtitleTrack } from '../api/subtitles'
@@ -48,6 +48,26 @@ import { mediaVersionsOf } from '../utils/mediaVersion'
 //
 // External subtitles next to the source file are auto-discovered and
 // attached as <track> elements.
+type PlaybackProgressSession = {
+  mediaId: string
+  id: string
+  startedAtMs: number
+  sequence: number
+}
+
+function newPlaybackProgressSession(mediaId: string): PlaybackProgressSession {
+  const randomID =
+    typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function'
+      ? crypto.randomUUID()
+      : `${Date.now()}-${Math.random().toString(36).slice(2)}`
+  return {
+    mediaId,
+    id: `${mediaId}:${randomID}`,
+    startedAtMs: Date.now(),
+    sequence: 0,
+  }
+}
+
 export function PlayerPage() {
   const { id = '' } = useParams()
   const [params, setParams] = useSearchParams()
@@ -57,6 +77,7 @@ export function PlayerPage() {
   const ref = useRef<HTMLVideoElement>(null)
   const hlsRef = useRef<Hls | null>(null)
   const lastSentRef = useRef(0)
+  const progressSessionRef = useRef<PlaybackProgressSession | null>(null)
   const directRetryRef = useRef(false)
   const retryingDirectRef = useRef(false)
   const fallbackTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
@@ -565,41 +586,73 @@ export function PlayerPage() {
     modeRef.current = mode
   }, [hlsStartSec, mode])
 
-  // Persist resume position every 10 seconds while playing, and immediately upon pause/unmount.
+  // Persist resume position every 10 seconds while playing, and immediately upon
+  // pause/page hide/unmount. Bind after mediaId is available because
+  // PlayerVideoStage does not render the <video> element until media is loaded.
   useEffect(() => {
-    if (!id || !ref.current) return
+    if (!id || !mediaId || !ref.current) return
     const video = ref.current
+    if (progressSessionRef.current?.mediaId !== mediaId) {
+      progressSessionRef.current = newPlaybackProgressSession(mediaId)
+      lastSentRef.current = 0
+    }
+
     const absolutePositionMs = () => {
       const currentStartSec = modeRef.current === 'hls' ? hlsStartSecRef.current : 0
-      return Math.floor((currentStartSec + (video.currentTime || 0)) * 1000)
+      const absolute = currentStartSec + (video.currentTime || 0)
+      return Number.isFinite(absolute) ? Math.max(0, Math.floor(absolute * 1000)) : 0
     }
     const absoluteDurationMs = () => {
       const currentStartSec = modeRef.current === 'hls' ? hlsStartSecRef.current : 0
       const mediaDur = mediaRef.current?.duration_sec || 0
-      return Math.floor(Math.max(mediaDur, currentStartSec + (video.duration || 0)) * 1000)
+      const streamDur = Number.isFinite(video.duration) ? video.duration : 0
+      const totalSec = Math.max(mediaDur, currentStartSec + streamDur)
+      return Number.isFinite(totalSec) && totalSec > 0 ? Math.floor(totalSec * 1000) : 0
     }
-    const handler = () => {
+    const send = (keepalive: boolean) => {
+      const currentMedia = mediaRef.current
+      if (!currentMedia || currentMedia.id !== mediaId) return
       const now = Date.now()
-      if (now - lastSentRef.current < 10_000) return
+      if (!keepalive && now - lastSentRef.current < 10_000) return
       lastSentRef.current = now
       const positionMs = absolutePositionMs()
+      if (positionMs <= 0) return
       const durationMs = absoluteDurationMs()
-      if (positionMs > 0 && mediaRef.current) {
-        playbackAPI.recordProgress(mediaRef.current.id, positionMs, durationMs).catch(() => undefined)
+      const session = progressSessionRef.current
+      if (!session || session.mediaId !== mediaId) return
+      session.sequence += 1
+      const payload = {
+        media_id: currentMedia.id,
+        position_ms: positionMs,
+        duration_ms: durationMs,
+        session_id: session.id,
+        session_started_at_ms: session.startedAtMs,
+        sequence: session.sequence,
       }
+      if (keepalive) {
+        postPlaybackProgressKeepalive(payload)
+        return
+      }
+      playbackAPI.recordProgress(payload).catch(() => undefined)
     }
-    video.addEventListener('timeupdate', handler)
-    video.addEventListener('pause', handler)
+    const onTimeUpdate = () => send(false)
+    const onPause = () => send(true)
+    const onPageHide = () => send(true)
+    const onVisibilityChange = () => {
+      if (document.visibilityState === 'hidden') send(true)
+    }
+    video.addEventListener('timeupdate', onTimeUpdate)
+    video.addEventListener('pause', onPause)
+    window.addEventListener('pagehide', onPageHide)
+    document.addEventListener('visibilitychange', onVisibilityChange)
     return () => {
-      video.removeEventListener('timeupdate', handler)
-      video.removeEventListener('pause', handler)
-      const positionMs = absolutePositionMs()
-      const durationMs = absoluteDurationMs()
-      if (positionMs > 0 && mediaRef.current) {
-        playbackAPI.recordProgress(mediaRef.current.id, positionMs, durationMs).catch(() => undefined)
-      }
+      video.removeEventListener('timeupdate', onTimeUpdate)
+      video.removeEventListener('pause', onPause)
+      window.removeEventListener('pagehide', onPageHide)
+      document.removeEventListener('visibilitychange', onVisibilityChange)
+      send(true)
     }
-  }, [id])
+  }, [id, mediaId])
 
   // 加载剧集/播放列表
   useEffect(() => {

web/src/pages/settingsGroupGeneral.ts

@@ -99,6 +99,14 @@ export const generalSettingsGroup: SettingGroup = {
       hint: 'NAS 建议 1；用于扫描、整理洗版和手动探测，避免同时启动多个 ffprobe 进程',
       defaultValue: '1',
     },
+    {
+      key: 'cache.memory_max_size_mb',
+      label: '进程内缓存上限 (MB)',
+      type: 'number',
+      hint: 'JSON/列表等热缓存共用的内存上限。低配机器建议 32-64，内存充足可用 128-256；保存后会立即裁剪超额缓存，默认 128MB',
+      defaultValue: '128',
+      placeholder: '128',
+    },
     {
       key: 'cache.images_max_size_mb',
       label: '图片缓存上限 (MB)',

web/src/pages/useLibraryData.ts

@@ -1,19 +1,26 @@
-import { useCallback, useEffect, useMemo, useState } from 'react'
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import toast from 'react-hot-toast'
 
 import { libraryAPI } from '../api/library'
 import type { Library, Media } from '../types'
 import { peekLibrary, resolveLibrary } from '../utils/libraryCache'
 import { groupSeries, isEpisodeLike, type SeriesCard } from '../utils/groupSeries'
+import type { SortField, SortOrder } from '../utils/mediaSort'
 
-export function useLibraryData(libraryID: string, selectedSeries: SeriesCard | null) {
+export function useLibraryData(
+  libraryID: string,
+  selectedSeries: SeriesCard | null,
+  sortField: SortField,
+  sortOrder: SortOrder,
+) {
   const [library, setLibrary] = useState<Library | null>(null)
   const [items, setItems] = useState<Media[]>([])
   const [serverSeriesCards, setServerSeriesCards] = useState<SeriesCard[]>([])
   const [seriesEpisodeItems, setSeriesEpisodeItems] = useState<Media[]>([])
   const [total, setTotal] = useState(0)
   const [loading, setLoading] = useState(true)
-  const [loadingAll, setLoadingAll] = useState(false)
+  const [loadingMore, setLoadingMore] = useState(false)
+  const [hasMore, setHasMore] = useState(false)
   const [loadingSeriesEpisodes, setLoadingSeriesEpisodes] = useState(false)
 
   const isSeriesLibrary = isSeriesLibraryType(library?.type)
@@ -26,79 +33,96 @@ export function useLibraryData(libraryID: string, selectedSeries: SeriesCard | n
     return groupSeries(items)
   }, [isSeries, isSeriesLibrary, items, serverSeriesCards])
 
-  // reloadCurrentLibrary 通过自增 tick 重跑加载（原实现靠克隆 library 对象
-  // 触发第二个 effect，这里合并成单个 bootstrap effect 后改用显式信号）。
   const [reloadTick, setReloadTick] = useState(0)
+  const requestSeqRef = useRef(0)
+  const nextPageRef = useRef(2)
+  const loadedCountRef = useRef(0)
+  const totalRef = useRef(0)
+  const hasMoreRef = useRef(false)
+  const libraryRef = useRef<Library | null>(null)
+  const modeRef = useRef<'media' | 'series'>('media')
+  const moreInFlightRef = useRef(false)
 
   useEffect(() => {
     if (!libraryID) return
+    const seq = ++requestSeqRef.current
     let cancelled = false
+    nextPageRef.current = 2
+    loadedCountRef.current = 0
+    totalRef.current = 0
+    hasMoreRef.current = false
+    moreInFlightRef.current = false
     setLoading(true)
-    setLoadingAll(false)
+    setLoadingMore(false)
+    setHasMore(false)
     setLibrary(null)
     setItems([])
     setServerSeriesCards([])
     setSeriesEpisodeItems([])
+    setTotal(0)
 
     const bootstrap = async () => {
-      // 库信息先查会话缓存（首页/全部媒体库页已拉过全量列表），命中则
-      // 同步就绪，内容请求在挂载当帧即发出；未命中才退回单独请求，
-      // 消除原先"先等库信息、再等内容"的两段串行首屏等待。
-      let lib = peekLibrary(libraryID)
-      if (lib) setLibrary(lib)
+      let lib = peekLibrary(libraryID) ?? null
+      if (lib) {
+        libraryRef.current = lib
+        setLibrary(lib)
+      }
       try {
         const resolved = await resolveLibrary(libraryID)
-        if (cancelled) return
+        if (cancelled || seq !== requestSeqRef.current) return
         if (!lib) {
           lib = resolved
+          libraryRef.current = lib
           setLibrary(lib)
         }
       } catch {
-        if (!cancelled) {
+        if (!cancelled && seq === requestSeqRef.current) {
           setLoading(false)
           toast.error('媒体库不存在或无权限')
         }
         return
       }
+      if (!lib || cancelled || seq !== requestSeqRef.current) return
 
-      const seriesLibrary = isSeriesLibraryType(lib.type)
-      setLoadingAll(true)
+      const seriesMode = isSeriesLibraryType(lib.type)
+      modeRef.current = seriesMode ? 'series' : 'media'
+      const pageSize = pageSizeFor(lib, seriesMode)
       try {
-        if (seriesLibrary) {
-          const collected = await loadAllSeriesCards(libraryID, lib.is_remote_emby, (next) => {
-            if (cancelled) return
-            setTotal(next.total)
-            if (next.firstPage) {
-              setServerSeriesCards(next.items)
-              setLoading(false)
-            }
-          }, () => cancelled)
-          if (!cancelled) setServerSeriesCards(collected.items)
-          return
+        if (seriesMode) {
+          const data = await libraryAPI.listSeries(libraryID, 1, pageSize, { sort: sortField, order: sortOrder })
+          if (cancelled || seq !== requestSeqRef.current) return
+          const pageItems = data.items ?? []
+          setServerSeriesCards(pageItems)
+          loadedCountRef.current = pageItems.length
+          totalRef.current = data.total ?? pageItems.length
+        } else {
+          const data = await libraryAPI.listMedia(libraryID, 1, pageSize, { sort: sortField, order: sortOrder })
+          if (cancelled || seq !== requestSeqRef.current) return
+          const pageItems = data.items ?? []
+          setItems(pageItems)
+          loadedCountRef.current = pageItems.length
+          totalRef.current = data.total ?? pageItems.length
         }
-
-        const collected = await loadAllMedia(libraryID, lib.is_remote_emby, (next) => {
-          if (cancelled) return
-          setTotal(next.total)
-          if (next.firstPage) {
-            setItems(next.items)
-            setLoading(false)
-          }
-        }, () => cancelled)
-        if (!cancelled) setItems(collected.items)
+        setTotal(totalRef.current)
+        hasMoreRef.current = loadedCountRef.current < totalRef.current
+        setHasMore(hasMoreRef.current)
       } catch {
-        if (!cancelled) toast.error('媒体库加载失败')
+        if (!cancelled && seq === requestSeqRef.current) {
+          toast.error('媒体库加载失败')
+        }
       } finally {
-        if (!cancelled) {
+        if (!cancelled && seq === requestSeqRef.current) {
           setLoading(false)
-          setLoadingAll(false)
         }
       }
     }
 
     void bootstrap()
-    return () => { cancelled = true }
-  }, [libraryID, reloadTick])
+    return () => {
+      cancelled = true
+      requestSeqRef.current += 1
+    }
+  }, [libraryID, reloadTick, sortField, sortOrder])
 
   useEffect(() => {
     if (!libraryID || !isSeriesLibrary || !selectedSeries) {
@@ -122,15 +146,74 @@ export function useLibraryData(libraryID: string, selectedSeries: SeriesCard | n
     return () => { cancelled = true }
   }, [libraryID, isSeriesLibrary, selectedSeries])
 
+  const loadMore = useCallback(async () => {
+    const lib = libraryRef.current
+    if (!lib || moreInFlightRef.current || !hasMoreRef.current) return
+    const seq = requestSeqRef.current
+    moreInFlightRef.current = true
+    setLoadingMore(true)
+    try {
+      const page = nextPageRef.current
+      if (modeRef.current === 'series') {
+        const data = await libraryAPI.listSeries(libraryID, page, pageSizeFor(lib, true), {
+          sort: sortField,
+          order: sortOrder,
+        })
+        if (seq !== requestSeqRef.current) return
+        const pageItems = data.items ?? []
+        setServerSeriesCards((prev) => [...prev, ...pageItems])
+        loadedCountRef.current += pageItems.length
+        totalRef.current = data.total ?? totalRef.current
+        nextPageRef.current = page + 1
+        hasMoreRef.current = pageItems.length > 0 && loadedCountRef.current < totalRef.current
+      } else {
+        const data = await libraryAPI.listMedia(libraryID, page, pageSizeFor(lib, false), {
+          sort: sortField,
+          order: sortOrder,
+        })
+        if (seq !== requestSeqRef.current) return
+        const pageItems = data.items ?? []
+        setItems((prev) => [...prev, ...pageItems])
+        loadedCountRef.current += pageItems.length
+        totalRef.current = data.total ?? totalRef.current
+        nextPageRef.current = page + 1
+        hasMoreRef.current = pageItems.length > 0 && loadedCountRef.current < totalRef.current
+      }
+      setTotal(totalRef.current)
+      setHasMore(hasMoreRef.current)
+    } catch {
+      toast.error('媒体库加载失败')
+      hasMoreRef.current = false
+      setHasMore(false)
+    } finally {
+      moreInFlightRef.current = false
+      setLoadingMore(false)
+    }
+  }, [libraryID, sortField, sortOrder])
+
+  const loadAll = useCallback(async () => {
+    const seq = requestSeqRef.current
+    setLoadingMore(true)
+    try {
+      while (seq === requestSeqRef.current && hasMoreRef.current) {
+        await loadMore()
+        if (seq !== requestSeqRef.current || !hasMoreRef.current) break
+        await yieldToBrowser()
+      }
+    } finally {
+      if (seq === requestSeqRef.current) setLoadingMore(false)
+    }
+  }, [loadMore])
+
   const reloadCurrentLibrary = useCallback(() => {
     setReloadTick((tick) => tick + 1)
   }, [])
 
-  const loadingAllText = loadingAll && !loading && (isSeriesLibrary ? total > serverSeriesCards.length : total > items.length)
-    ? (isSeriesLibrary
-      ? `正在继续加载剧集卡片：${serverSeriesCards.length} / ${total}`
-      : `正在继续加载全部条目：${items.length} / ${total}`)
-    : ''
+  const loadedCount = isSeriesLibrary ? serverSeriesCards.length : items.length
+  const loadingAllText =
+    !loading && hasMore
+      ? `已加载 ${loadedCount} / ${total}，向下滚动继续加载`
+      : ''
 
   return {
     library,
@@ -138,6 +221,10 @@ export function useLibraryData(libraryID: string, selectedSeries: SeriesCard | n
     seriesEpisodeItems,
     total,
     loading,
+    loadingMore,
+    hasMore,
+    loadMore,
+    loadAll,
     loadingSeriesEpisodes,
     isSeriesLibrary,
     isSeries,
@@ -151,6 +238,11 @@ function isSeriesLibraryType(type?: string) {
   return type === 'tv' || type === 'anime' || type === 'variety'
 }
 
+function pageSizeFor(lib: Library, seriesMode: boolean): number {
+  if (lib.is_remote_emby) return 100
+  return seriesMode ? 500 : 2000
+}
+
 function yieldToBrowser(): Promise<void> {
   return new Promise((resolve) => {
     if (typeof requestIdleCallback !== 'undefined') {
@@ -159,54 +251,4 @@ function yieldToBrowser(): Promise<void> {
       setTimeout(resolve, 0)
     }
   })
-}
-
-async function loadAllSeriesCards(
-  libraryID: string,
-  isRemoteEmby: boolean | undefined,
-  onPage: (state: { items: SeriesCard[]; total: number; firstPage: boolean }) => void,
-  isCancelled: () => boolean,
-) {
-  const pageSize = isRemoteEmby ? 100 : 500
-  let page = 1
-  let collected: SeriesCard[] = []
-  for (;;) {
-    // 切库/卸载后取消标志置位，立即停止继续拉取剩余页
-    if (isCancelled()) return { items: collected }
-    const data = await libraryAPI.listSeries(libraryID, page, pageSize)
-    if (isCancelled()) return { items: collected }
-    // 后端对空库可能返回 items: null（Go nil slice）；不兜底会 concat 出 [null] 并崩溃。
-    const pageItems = data.items ?? []
-    collected = collected.concat(pageItems)
-    onPage({ items: collected, total: data.total ?? collected.length, firstPage: page === 1 })
-    if (collected.length >= (data.total ?? 0) || pageItems.length < pageSize) break
-    page += 1
-    await yieldToBrowser()
-  }
-  return { items: collected }
-}
-
-async function loadAllMedia(
-  libraryID: string,
-  isRemoteEmby: boolean | undefined,
-  onPage: (state: { items: Media[]; total: number; firstPage: boolean }) => void,
-  isCancelled: () => boolean,
-) {
-  const pageSize = isRemoteEmby ? 100 : 2000
-  let page = 1
-  let collected: Media[] = []
-  for (;;) {
-    // 切库/卸载后取消标志置位，立即停止继续拉取剩余页
-    if (isCancelled()) return { items: collected }
-    const data = await libraryAPI.listMedia(libraryID, page, pageSize)
-    if (isCancelled()) return { items: collected }
-    // 后端对空库可能返回 items: null（Go nil slice）；不兜底会 concat 出 [null] 并崩溃。
-    const pageItems = data.items ?? []
-    collected = collected.concat(pageItems)
-    onPage({ items: collected, total: data.total ?? collected.length, firstPage: page === 1 })
-    if (collected.length >= (data.total ?? 0) || pageItems.length < pageSize) break
-    page += 1
-    await yieldToBrowser()
-  }
-  return { items: collected }
-}
+}

web/src/types/library.ts

@@ -24,6 +24,8 @@ export interface Library {
   /** 远程 Emby 挂载库（只读，不支持扫描/刮削/编辑） */
   is_remote_emby?: boolean
   remote_source?: string
+  /** 媒体条目总数；`/api/libraries` 已在元数据请求中一并返回。 */
+  total?: number
 }
 
 export interface ScanResult {