优化

$null

@@ -0,0 +1,2 @@
+'Get-Content' is not recognized as an internal or external command,
+operable program or batch file.

internal/handler/pinned_libraries.go

@@ -6,6 +6,7 @@ import (
 	"github.com/gin-gonic/gin"
 
 	"github.com/truewhile/MeBox/internal/middleware"
+	"github.com/truewhile/MeBox/internal/model"
 	"github.com/truewhile/MeBox/internal/service"
 )
 
@@ -13,6 +14,45 @@ type pinnedLibrariesReq struct {
 	LibraryIDs []string `json:"library_ids"`
 }
 
+type libraryTagsReq struct {
+	Tags []model.LibraryTagSet `json:"tags"`
+}
+
+func getLibraryTagsHandler(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		uid, _ := c.Get(middleware.CtxUserID)
+		tags, err := svc.Profile.GetLibraryTags(c.Request.Context(), uid.(string))
+		if err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+		if tags == nil {
+			tags = []model.LibraryTagSet{}
+		}
+		c.JSON(http.StatusOK, gin.H{"tags": tags})
+	}
+}
+
+func setLibraryTagsHandler(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		var req libraryTagsReq
+		if err := c.ShouldBindJSON(&req); err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+		uid, _ := c.Get(middleware.CtxUserID)
+		tags, err := svc.Profile.SetLibraryTags(c.Request.Context(), uid.(string), req.Tags)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+		if tags == nil {
+			tags = []model.LibraryTagSet{}
+		}
+		c.JSON(http.StatusOK, gin.H{"tags": tags})
+	}
+}
+
 func getPinnedLibrariesHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		uid, _ := c.Get(middleware.CtxUserID)

internal/handler/routes_authenticated_core.go

@@ -12,6 +12,8 @@ func registerAuthedUserAndLicenseRoutes(authed *gin.RouterGroup, svc *service.Co
 	authed.PATCH("/me", updateProfileHandler(svc))
 	authed.GET("/me/pinned-libraries", getPinnedLibrariesHandler(svc))
 	authed.PUT("/me/pinned-libraries", setPinnedLibrariesHandler(svc))
+	authed.GET("/me/library-tags", getLibraryTagsHandler(svc))
+	authed.PUT("/me/library-tags", setLibraryTagsHandler(svc))
 	authed.POST("/me/password", changePasswordHandler(svc))
 	authed.POST("/me/logout", logoutHandler(svc))
 	authed.GET("/me/temporary-password", temporaryPasswordHandler(svc))

internal/handler/routes_authenticated_test.go

@@ -27,6 +27,8 @@ func TestAuthenticatedRouteSurfacesAreRegistered(t *testing.T) {
 		"GET /api/me",
 		"GET /api/me/pinned-libraries",
 		"PUT /api/me/pinned-libraries",
+		"GET /api/me/library-tags",
+		"PUT /api/me/library-tags",
 		"GET /api/auth/permissions",
 		"GET /api/libraries",
 		"GET /api/media",

internal/handler/watch_history.go

@@ -92,13 +92,14 @@ func historyStatsHandler(svc *service.Container) gin.HandlerFunc {
 func historyContinueHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		uid, _ := c.Get(middleware.CtxUserID)
+		userID := toString(uid)
 		limit, _ := strconv.Atoi(c.DefaultQuery("limit", "10"))
 		if limit <= 0 || limit > 50 {
 			limit = 10
 		}
 		var rows []model.PlaybackHistory
 		if err := svc.Repo.DB.
-			Where("user_id = ? AND completed = ?", toString(uid), false).
+			Where("user_id = ? AND completed = ?", userID, false).
 			Order("watched_at desc").
 			Limit(limit).
 			Find(&rows).Error; err != nil {
@@ -116,61 +117,52 @@ func historyContinueHandler(svc *service.Container) gin.HandlerFunc {
 		}
 		mIdx := make(map[string]model.Media, len(media))
 		for _, m := range media {
-			if !mediaVisibleForRequest(c, svc, &m) {
-				continue
-			}
 			mIdx[m.ID] = m
 		}
 		out := make([]gin.H, 0, len(rows))
+		staleIDs := make([]string, 0)
 		for _, r := range rows {
 			m, ok := mIdx[r.MediaID]
-			if !ok {
-				if svc.EmbyRemote != nil && service.IsEmbyRemoteID(r.MediaID) {
-					mountID, remoteID, _ := service.DecodeEmbyRemoteID(r.MediaID)
-					if mount, acct, _ := svc.EmbyRemote.ResolveMount(c.Request.Context(), mountID); mount != nil && acct != nil {
-						if rm, err := svc.EmbyRemote.RemoteMediaDetail(c.Request.Context(), mount, acct, remoteID); err == nil && rm != nil {
-							if mediaVisibleForRequest(c, svc, rm) {
-								out = append(out, gin.H{
-									"history": r,
-									"media":   *rm,
-								})
-							}
-							continue
-						}
-					}
-				}
-				fallback := fallbackHistoryMedia(r.MediaID)
-				if fallback != nil {
+			if ok {
+				if mediaVisibleForRequest(c, svc, &m) {
 					out = append(out, gin.H{
 						"history": r,
-						"media":   *fallback,
+						"media":   m,
 					})
 				}
 				continue
 			}
-			out = append(out, gin.H{
-				"history": r,
-				"media":   m,
-			})
+
+			if svc.EmbyRemote != nil && service.IsEmbyRemoteID(r.MediaID) {
+				mountID, remoteID, _ := service.DecodeEmbyRemoteID(r.MediaID)
+				mount, acct, resolveErr := svc.EmbyRemote.ResolveMount(c.Request.Context(), mountID)
+				if resolveErr == nil && mount != nil && acct != nil {
+					remoteMedia, detailErr := svc.EmbyRemote.RemoteMediaDetail(c.Request.Context(), mount, acct, remoteID)
+					if detailErr == nil && remoteMedia != nil {
+						if mediaVisibleForRequest(c, svc, remoteMedia) {
+							out = append(out, gin.H{
+								"history": r,
+								"media":   *remoteMedia,
+							})
+						}
+						continue
+					}
+				}
+			}
+
+			// 媒体记录已不存在。继续返回占位卡只会让用户点击后遇到 404，
+			// 因此清理这条失效播放记录，不再占用继续观看列表。
+			staleIDs = append(staleIDs, r.MediaID)
+		}
+		if len(staleIDs) > 0 {
+			_ = svc.Repo.DB.WithContext(c.Request.Context()).Unscoped().
+				Where("user_id = ? AND media_id IN ?", userID, staleIDs).
+				Delete(&model.PlaybackHistory{}).Error
 		}
 		c.JSON(http.StatusOK, out)
 	}
 }
 
-func fallbackHistoryMedia(mediaID string) *model.Media {
-	if mediaID == "" {
-		return nil
-	}
-	title := "媒体"
-	if service.IsEmbyRemoteID(mediaID) {
-		title = "远程媒体"
-	}
-	return &model.Media{
-		Base:  model.Base{ID: mediaID},
-		Title: title,
-	}
-}
-
 // historyDeleteHandler removes one or all history rows for the caller.
 //
 //	DELETE /api/watch-history?media_id=xxx  → delete just that media's row

internal/handler/watch_history_test.go

@@ -0,0 +1,105 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"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 TestHistoryContinueRemovesMissingMedia(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{}, &model.Media{}); err != nil {
+		t.Fatal(err)
+	}
+
+	valid := model.Media{
+		Base:  model.Base{ID: "media-valid"},
+		Title: "有效影片",
+		Path:  "/media/valid.mkv",
+	}
+	if err := db.Create(&valid).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	now := time.Now()
+	if err := db.Create(&model.PlaybackHistory{
+		Base:       model.Base{ID: "history-valid"},
+		UserID:     "user-1",
+		MediaID:    valid.ID,
+		PositionMs: 30_000,
+		DurationMs: 120_000,
+		WatchedAt:  now.Add(-time.Minute),
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Create(&model.PlaybackHistory{
+		Base:       model.Base{ID: "history-stale"},
+		UserID:     "user-1",
+		MediaID:    "media-deleted",
+		PositionMs: 60_000,
+		DurationMs: 120_000,
+		WatchedAt:  now,
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	repos := repository.New(db)
+	svc := &service.Container{
+		Log:      zap.NewNop(),
+		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.GET("/watch-history/continue", historyContinueHandler(svc))
+
+	req := httptest.NewRequest(http.MethodGet, "/watch-history/continue?limit=10", nil)
+	rec := httptest.NewRecorder()
+	router.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d, body = %s", rec.Code, rec.Body.String())
+	}
+
+	var body []struct {
+		History model.PlaybackHistory `json:"history"`
+		Media   model.Media           `json:"media"`
+	}
+	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
+		t.Fatal(err)
+	}
+	if len(body) != 1 {
+		t.Fatalf("continue watching rows = %d, want 1: %s", len(body), rec.Body.String())
+	}
+	if body[0].Media.ID != valid.ID || body[0].History.ID != "history-valid" {
+		t.Fatalf("unexpected row: %#v", body[0])
+	}
+
+	var staleCount int64
+	if err := db.Unscoped().Model(&model.PlaybackHistory{}).
+		Where("user_id = ? AND media_id = ?", "user-1", "media-deleted").
+		Count(&staleCount).Error; err != nil {
+		t.Fatal(err)
+	}
+	if staleCount != 0 {
+		t.Fatalf("stale history rows remaining = %d, want 0", staleCount)
+	}
+}

internal/model/library_tag.go

@@ -0,0 +1,118 @@
+package model
+
+import (
+	"encoding/json"
+	"strings"
+)
+
+// MaxLibraryTags 是单个用户可创建的标签数量上限，避免恶意写入过大的 JSON。
+const MaxLibraryTags = 50
+
+// MaxLibraryTagNameLen 是单个标签名的最大字符长度（按 rune 计数）。
+const MaxLibraryTagNameLen = 24
+
+// LibraryTagSet 是用户自定义的媒体库标签分组。
+// LibraryIDs 保存该标签下媒体库的 ID（含远程 Emby 挂载库的 embyremote~ 形式），
+// 顺序即媒体库在该标签内的展示顺序。
+type LibraryTagSet struct {
+	Name       string   `json:"name"`
+	LibraryIDs []string `json:"library_ids"`
+}
+
+// DecodeLibraryTags 解析 LibraryTags 字段，忽略损坏的数据。
+func (u *User) DecodeLibraryTags() []LibraryTagSet {
+	if u == nil || strings.TrimSpace(u.LibraryTags) == "" {
+		return nil
+	}
+	var tags []LibraryTagSet
+	if err := json.Unmarshal([]byte(u.LibraryTags), &tags); err != nil {
+		return nil
+	}
+	out := make([]LibraryTagSet, 0, len(tags))
+	for _, tag := range NormalizeLibraryTags(tags) {
+		out = append(out, tag)
+	}
+	if len(out) == 0 {
+		return nil
+	}
+	return out
+}
+
+// EncodeLibraryTags 把标签集合序列化为可写入 LibraryTags 字段的 JSON 字符串。
+// 空集合序列化为空字符串，便于用零值表达"没有标签"。
+func EncodeLibraryTags(tags []LibraryTagSet) (string, error) {
+	if len(tags) == 0 {
+		return "", nil
+	}
+	raw, err := json.Marshal(tags)
+	if err != nil {
+		return "", err
+	}
+	return string(raw), nil
+}
+
+// NormalizeLibraryTags 清洗标签集合：去空白、丢弃空名标签、去掉标签名与
+// 标签内媒体库 ID 的重复项，并把标签名重复的项合并。保持传入顺序。
+func NormalizeLibraryTags(tags []LibraryTagSet) []LibraryTagSet {
+	if len(tags) == 0 {
+		return nil
+	}
+	out := make([]LibraryTagSet, 0, len(tags))
+	indexByName := make(map[string]int, len(tags))
+	for _, tag := range tags {
+		name := TruncateLibraryTagName(tag.Name)
+		if name == "" {
+			continue
+		}
+		if len(out) >= MaxLibraryTags {
+			break
+		}
+		key := strings.ToLower(name)
+		pos, exists := indexByName[key]
+		if !exists {
+			if len(out) >= MaxLibraryTags {
+				break
+			}
+			out = append(out, LibraryTagSet{Name: name, LibraryIDs: []string{}})
+			pos = len(out) - 1
+			indexByName[key] = pos
+		}
+		seen := make(map[string]struct{}, len(out[pos].LibraryIDs))
+		for _, id := range out[pos].LibraryIDs {
+			seen[id] = struct{}{}
+		}
+		for _, id := range tag.LibraryIDs {
+			trimmed := strings.TrimSpace(id)
+			if trimmed == "" {
+				continue
+			}
+			if _, ok := seen[trimmed]; ok {
+				continue
+			}
+			seen[trimmed] = struct{}{}
+			out[pos].LibraryIDs = append(out[pos].LibraryIDs, trimmed)
+		}
+	}
+	if len(out) == 0 {
+		return nil
+	}
+	for i := range out {
+		if out[i].LibraryIDs == nil {
+			out[i].LibraryIDs = []string{}
+		}
+	}
+	return out
+}
+
+// TruncateLibraryTagName 去掉首尾空白并按 rune 截断到长度上限。
+func TruncateLibraryTagName(name string) string {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return ""
+	}
+	runes := []rune(name)
+	if len(runes) > MaxLibraryTagNameLen {
+		runes = runes[:MaxLibraryTagNameLen]
+	}
+	return strings.TrimSpace(string(runes))
+}

internal/model/library_tag_test.go

@@ -0,0 +1,79 @@
+package model
+
+import "testing"
+
+func TestNormalizeLibraryTagsMergesDuplicatesAndTrims(t *testing.T) {
+	tags := []LibraryTagSet{
+		{Name: "  动画  ", LibraryIDs: []string{" a ", "", "b", "a"}},
+		{Name: "动画", LibraryIDs: []string{"c", "b"}},
+		{Name: "   ", LibraryIDs: []string{"x"}},
+		{Name: "电影", LibraryIDs: nil},
+	}
+	got := NormalizeLibraryTags(tags)
+	if len(got) != 2 {
+		t.Fatalf("NormalizeLibraryTags len = %d, want 2 (%#v)", len(got), got)
+	}
+	if got[0].Name != "动画" {
+		t.Fatalf("first tag name = %q, want 动画", got[0].Name)
+	}
+	want := []string{"a", "b", "c"}
+	if len(got[0].LibraryIDs) != len(want) {
+		t.Fatalf("first tag ids = %v, want %v", got[0].LibraryIDs, want)
+	}
+	for i := range want {
+		if got[0].LibraryIDs[i] != want[i] {
+			t.Fatalf("first tag ids = %v, want %v", got[0].LibraryIDs, want)
+		}
+	}
+	if got[1].Name != "电影" || got[1].LibraryIDs == nil {
+		t.Fatalf("empty tag should survive with an empty non-nil id list: %#v", got[1])
+	}
+}
+
+func TestNormalizeLibraryTagsCapsCountAndNameLength(t *testing.T) {
+	long := make([]rune, MaxLibraryTagNameLen+10)
+	for i := range long {
+		long[i] = 'x'
+	}
+	got := NormalizeLibraryTags([]LibraryTagSet{{Name: string(long)}})
+	if len(got) != 1 {
+		t.Fatalf("len = %d, want 1", len(got))
+	}
+	if runes := []rune(got[0].Name); len(runes) != MaxLibraryTagNameLen {
+		t.Fatalf("name length = %d, want %d", len(runes), MaxLibraryTagNameLen)
+	}
+
+	many := make([]LibraryTagSet, 0, MaxLibraryTags+5)
+	for i := 0; i < MaxLibraryTags+5; i++ {
+		many = append(many, LibraryTagSet{Name: string(rune('a' + i%26)) + "-" + string(rune('a'+i/26))})
+	}
+	if capped := NormalizeLibraryTags(many); len(capped) > MaxLibraryTags {
+		t.Fatalf("capped len = %d, want <= %d", len(capped), MaxLibraryTags)
+	}
+}
+
+func TestEncodeDecodeLibraryTagsRoundTrip(t *testing.T) {
+	user := &User{}
+	if encoded, err := EncodeLibraryTags(nil); err != nil || encoded != "" {
+		t.Fatalf("EncodeLibraryTags(nil) = %q, %v; want \"\", nil", encoded, err)
+	}
+	raw, err := EncodeLibraryTags([]LibraryTagSet{{Name: "动画", LibraryIDs: []string{"lib-1"}}})
+	if err != nil {
+		t.Fatalf("EncodeLibraryTags: %v", err)
+	}
+	user.LibraryTags = raw
+	decoded := user.DecodeLibraryTags()
+	if len(decoded) != 1 || decoded[0].Name != "动画" || len(decoded[0].LibraryIDs) != 1 || decoded[0].LibraryIDs[0] != "lib-1" {
+		t.Fatalf("DecodeLibraryTags = %#v", decoded)
+	}
+
+	user.LibraryTags = "{not json"
+	if decoded := user.DecodeLibraryTags(); decoded != nil {
+		t.Fatalf("corrupt payload should decode to nil, got %#v", decoded)
+	}
+
+	user.PopulateComputedFields()
+	if user.LibraryTagList != nil {
+		t.Fatalf("PopulateComputedFields should mirror DecodeLibraryTags, got %#v", user.LibraryTagList)
+	}
+}

internal/model/user.go

@@ -28,6 +28,11 @@ type User struct {
 	// PinnedLibraryIDs 存储用户置顶的媒体库 ID 列表（JSON 字符串），顺序即置顶优先级。
 	PinnedLibraryIDs  string   `gorm:"type:text" json:"-"`
 	PinnedLibraryList []string `gorm:"-" json:"pinned_library_ids,omitempty"`
+	// LibraryTags 存储用户自定义的媒体库标签分组（JSON 字符串），
+	// 形如 [{"name":"动画","library_ids":["lib-1","lib-2"]}]。标签属于用户本人，
+	// 用于在媒体库页把同一标签下的媒体库聚合到一起。
+	LibraryTags    string          `gorm:"type:text" json:"-"`
+	LibraryTagList []LibraryTagSet `gorm:"-" json:"library_tags,omitempty"`
 	// SubtitleChineseMode 是网页播放器外挂字幕的简繁转换偏好：
 	// original / simplified / traditional。
 	SubtitleChineseMode string `gorm:"size:16;not null;default:original" json:"subtitle_chinese_mode"`
@@ -103,4 +108,5 @@ func (u *User) PopulateComputedFields() {
 	}
 	u.AllowedLibraryList = u.DecodeAllowedLibraryIDs()
 	u.PinnedLibraryList = u.DecodePinnedLibraryIDs()
+	u.LibraryTagList = u.DecodeLibraryTags()
 }

internal/service/emby_remote.go

@@ -880,6 +880,9 @@ func (r *EmbyRemoteService) RemoteLatestForDisplay(ctx context.Context, mount *m
 // RemoteLatestSeries 拉取剧集库最近更新的 Series。部分 Emby 服务不支持
 // DateLastContentAdded 或过滤 Series，此时回退到 Latest 并把 Episode 归并到
 // 对应 Series。
+//
+// 使用 Recursive=true 并跳过 anime/ 等中间容器，与 RemoteSeriesCards /
+// Emby 客户端列剧集方式一致。
 func (r *EmbyRemoteService) RemoteLatestSeries(ctx context.Context, mount *model.EmbyMount, acct *model.StrmAccount, remoteViewID string, limit int) ([]map[string]any, error) {
 	if limit <= 0 || limit > 100 {
 		limit = 20
@@ -891,17 +894,32 @@ func (r *EmbyRemoteService) RemoteLatestSeries(ctx context.Context, mount *model
 	q := url.Values{}
 	q.Set("ParentId", remoteViewID)
 	q.Set("IncludeItemTypes", "Series")
-	q.Set("Recursive", "false")
+	q.Set("Recursive", "true")
 	q.Set("SortBy", "DateLastContentAdded")
 	q.Set("SortOrder", "Descending")
-	q.Set("Limit", strconv.Itoa(limit))
+	// 多取一些以便滤掉中间容器后仍够 limit。
+	q.Set("Limit", strconv.Itoa(limit*4))
 	q.Set("Fields", "Overview,Genres,ProviderIds,Path,RecursiveItemCount,SeriesPrimaryImage,DateCreated,DateLastMediaAdded,PremiereDate,ProductionYear,CommunityRating,CriticRating")
 	var body struct {
 		Items []map[string]any `json:"Items"`
 	}
 	if err := r.doGet(ctx, acct, cfg, "/Users/"+url.PathEscape(r.remoteUserID(cfg))+"/Items", q, &body); err == nil && len(body.Items) > 0 {
-		RewriteEmbyRemoteIDs(body.Items, mount.ID)
-		return body.Items, nil
+		filtered := make([]map[string]any, 0, limit)
+		for _, it := range body.Items {
+			name := remoteItemString(it, "Name")
+			path := remoteItemString(it, "Path")
+			if remoteSeriesItemLooksLikeContainer(name, path) {
+				continue
+			}
+			filtered = append(filtered, it)
+			if len(filtered) >= limit {
+				break
+			}
+		}
+		if len(filtered) > 0 {
+			RewriteEmbyRemoteIDs(filtered, mount.ID)
+			return filtered, nil
+		}
 	}
 
 	items, err := r.RemoteLatest(ctx, mount, acct, remoteViewID, limit)

internal/service/emby_remote_web.go

@@ -516,17 +516,17 @@ const remoteSeriesPageSize = 200
 
 // RemoteSeriesCards 远程剧集库的系列卡片（ChildCount 作为集数）。
 //
-// 远程 Emby 的 Series DTO 不会返回 DateLastMediaAdded 字段（即使请求 Fields
-// 也缺失），但其服务端排序支持 SortBy=DateLastContentAdded——即客户端"上次
-// 添加集日期"排序。因此这里直接按该键倒序分页拉全量，返回的卡片顺序与对方
-// Emby 客户端选择"上次添加集日期"完全一致；LastAddedAt 在远程提供字段时
-// 才填充，否则保持 nil（前端对无该值的卡片维持服务器顺序，不再回退加入日期）。
+// 与 Emby 客户端一致：IncludeItemTypes=Series + Recursive=true，按
+// DateLastContentAdded 倒序分页拉全库剧集。多媒体根下的 anime/ 等中间容器
+// 若偶发出现在结果里则过滤掉；LastAddedAt 仅在远程提供 DateLastMediaAdded
+// 时填充。
 func (r *EmbyRemoteService) RemoteSeriesCards(ctx context.Context, mount *model.EmbyMount, acct *model.StrmAccount, remoteViewID string) ([]SeriesCard, error) {
 	cfg, err := r.remoteConfigWithToken(ctx, acct)
 	if err != nil {
 		return nil, err
 	}
-	cacheKey := r.remoteCacheKey("series-cards", acct.ID, mount.ID, remoteViewID)
+	// v3：Recursive=true（对齐 Emby 客户端），与旧直属/下探缓存区分。
+	cacheKey := r.remoteCacheKey("series-cards-v3", acct.ID, mount.ID, remoteViewID)
 	var cached []SeriesCard
 	if r.cache != nil && r.cache.GetJSON(ctx, cacheKey, &cached) {
 		return cached, nil
@@ -534,7 +534,7 @@ func (r *EmbyRemoteService) RemoteSeriesCards(ctx context.Context, mount *model.
 	q := url.Values{}
 	q.Set("ParentId", remoteViewID)
 	q.Set("IncludeItemTypes", "Series")
-	q.Set("Recursive", "false")
+	q.Set("Recursive", "true")
 	q.Set("SortBy", "DateLastContentAdded")
 	q.Set("SortOrder", "Descending")
 	q.Set("Limit", strconv.Itoa(remoteSeriesPageSize))
@@ -554,9 +554,13 @@ func (r *EmbyRemoteService) RemoteSeriesCards(ctx context.Context, mount *model.
 			break
 		}
 		for _, it := range body.Items {
+			name := remoteItemString(it, "Name")
+			path := remoteItemString(it, "Path")
+			if remoteSeriesItemLooksLikeContainer(name, path) {
+				continue
+			}
 			RewriteEmbyRemoteIDs(it, mount.ID)
 			m := r.MapRemoteItemToMedia(ctx, mount, acct, cfg, it)
-			// 集数优先用递归条目数（ChildCount 只算直属 Season 文件夹数）。
 			count := remoteItemInt(it, "RecursiveItemCount")
 			if count == 0 {
 				count = remoteItemInt(it, "ChildCount")
@@ -577,7 +581,7 @@ func (r *EmbyRemoteService) RemoteSeriesCards(ctx context.Context, mount *model.
 				LastAddedAt: lastAdded,
 			})
 		}
-		if int64(len(cards)) >= body.TotalRecordCount || len(body.Items) < remoteSeriesPageSize {
+		if int64(startIndex+len(body.Items)) >= body.TotalRecordCount || len(body.Items) < remoteSeriesPageSize {
 			break
 		}
 	}
@@ -587,6 +591,14 @@ func (r *EmbyRemoteService) RemoteSeriesCards(ctx context.Context, mount *model.
 	return cards, nil
 }
 
+func remoteSeriesItemLooksLikeContainer(name, path string) bool {
+	if isEmbyGenericContainer(name) {
+		return true
+	}
+	base := pathBaseSlash(strings.TrimRight(strings.ReplaceAll(path, "\\", "/"), "/"))
+	return base != "" && isEmbyGenericContainer(base)
+}
+
 // RemoteLatestCards 远程库最新条目（首页预览卡片），映射 SeriesCard。
 func (r *EmbyRemoteService) RemoteLatestCards(ctx context.Context, mount *model.EmbyMount, acct *model.StrmAccount, remoteViewID string, limit int) ([]SeriesCard, error) {
 	cfg, err := r.remoteConfigWithToken(ctx, acct)

internal/service/emby_remote_web_test.go

@@ -121,10 +121,15 @@ func TestRemoteSeriesCardsAutoAuthOnFirstBrowse(t *testing.T) {
 		}
 		if r.URL.Path == "/emby/Users/real-user-guid/Items" {
 			q := r.URL.Query()
-			if q.Get("ParentId") != "view-1" || q.Get("IncludeItemTypes") != "Series" {
+			if q.Get("IncludeItemTypes") != "Series" || q.Get("ParentId") != "view-1" {
 				w.WriteHeader(http.StatusBadRequest)
 				return
 			}
+			if q.Get("Recursive") != "true" {
+				w.WriteHeader(http.StatusBadRequest)
+				_, _ = w.Write([]byte("expected Recursive=true"))
+				return
+			}
 			w.Header().Set("Content-Type", "application/json")
 			_ = json.NewEncoder(w).Encode(map[string]any{
 				"TotalRecordCount": 1,
@@ -231,6 +236,11 @@ func TestRemoteSeriesCardsResolveUserIDFromAPIKey(t *testing.T) {
 			return
 		}
 		if r.URL.Path == "/emby/Users/real-user-guid/Items" {
+			q := r.URL.Query()
+			if q.Get("ParentId") != "view-2" || q.Get("Recursive") != "true" {
+				w.WriteHeader(http.StatusNotFound)
+				return
+			}
 			w.Header().Set("Content-Type", "application/json")
 			_ = json.NewEncoder(w).Encode(map[string]any{
 				"TotalRecordCount": 1,
@@ -674,6 +684,11 @@ func TestRemoteSeriesCardsFetchAllPages(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		query := r.URL.Query()
+		if query.Get("Recursive") != "true" {
+			w.WriteHeader(http.StatusBadRequest)
+			_, _ = w.Write([]byte("expected Recursive=true"))
+			return
+		}
 		startIndex, _ := strconv.Atoi(query.Get("StartIndex"))
 		limit, _ := strconv.Atoi(query.Get("Limit"))
 		requests.Add(1)
@@ -740,6 +755,84 @@ func TestRemoteSeriesCardsFetchAllPages(t *testing.T) {
 	}
 }
 
+// 与 Emby 客户端一致：Recursive=true 拉全库 Series，并过滤 anime 等中间容器。
+func TestRemoteSeriesCardsRecursiveFiltersAnimeContainers(t *testing.T) {
+	var sawRecursive atomic.Bool
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		if strings.TrimPrefix(r.URL.Path, "/emby") != "/Users/remote-user/Items" {
+			http.NotFound(w, r)
+			return
+		}
+		q := r.URL.Query()
+		if q.Get("ParentId") != "view-2023" || q.Get("IncludeItemTypes") != "Series" {
+			http.NotFound(w, r)
+			return
+		}
+		if q.Get("Recursive") == "true" {
+			sawRecursive.Store(true)
+		}
+		_ = json.NewEncoder(w).Encode(map[string]any{
+			"TotalRecordCount": 5,
+			"Items": []map[string]any{
+				{"Id": "c0", "Name": "anime", "Type": "Series", "Path": "https://cdn/0/anime/", "RecursiveItemCount": 3086},
+				{"Id": "c1", "Name": "anime", "Type": "Series", "Path": "https://cdn/1/anime/", "RecursiveItemCount": 567},
+				{"Id": "s-a", "Name": "数码宝贝 BEATBREAK", "Type": "Series", "Path": "https://cdn/0/anime/digimon", "RecursiveItemCount": 24},
+				{"Id": "s-b", "Name": "活死喵之夜", "Type": "Series", "Path": "https://cdn/0/anime/nyaight", "RecursiveItemCount": 12},
+				{"Id": "s-c", "Name": "药屋少女的呢喃", "Type": "Series", "Path": "https://cdn/1/anime/kusuriya", "RecursiveItemCount": 51},
+			},
+		})
+	}))
+	defer server.Close()
+
+	db := newServiceTestDB(t, &model.StrmAccount{}, &model.EmbyMount{})
+	repos := repository.New(db)
+	svc := NewEmbyRemoteService(&config.Config{}, zap.NewNop(), repos, NewCryptoService("", zap.NewNop()))
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            server.URL,
+		"token":          "fake-token",
+		"remote_user_id": "remote-user",
+	})
+	acct := &model.StrmAccount{
+		Base:     model.Base{ID: "acct-recursive"},
+		Name:     "nijigem",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}
+	if err := repos.StrmAccount.Create(t.Context(), acct); err != nil {
+		t.Fatalf("create account: %v", err)
+	}
+	mount := &model.EmbyMount{
+		Base:           model.Base{ID: "mount-recursive"},
+		AccountID:      acct.ID,
+		RemoteViewID:   "view-2023",
+		RemoteViewName: "2023前 动漫",
+		CollectionType: "tvshows",
+		Enabled:        true,
+	}
+	if err := repos.EmbyMount.Create(t.Context(), mount); err != nil {
+		t.Fatalf("create mount: %v", err)
+	}
+
+	cards, err := svc.RemoteSeriesCards(t.Context(), mount, acct, mount.RemoteViewID)
+	if err != nil {
+		t.Fatalf("RemoteSeriesCards failed: %v", err)
+	}
+	if !sawRecursive.Load() {
+		t.Fatal("expected Recursive=true on remote Items request")
+	}
+	if len(cards) != 3 {
+		t.Fatalf("cards = %d, want 3 real series after filtering anime containers", len(cards))
+	}
+	for _, card := range cards {
+		if strings.EqualFold(card.Rep.Title, "anime") {
+			t.Fatalf("container title %q should have been filtered", card.Rep.Title)
+		}
+	}
+}
+
 // 首页「最新条目」卡片 key 必须与媒体库剧集列表的 key 一致，否则点击后
 // 媒体库页找不到目标剧集，只能退回整库列表。
 func TestRemoteLatestCardsKeyMatchesSeriesList(t *testing.T) {
@@ -751,6 +844,14 @@ func TestRemoteLatestCardsKeyMatchesSeriesList(t *testing.T) {
 			return
 		}
 		seriesQueryCalls.Add(1)
+		parentID := r.URL.Query().Get("ParentId")
+		if parentID == "series-latest" {
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"Items":            []map[string]any{},
+				"TotalRecordCount": 0,
+			})
+			return
+		}
 		_ = json.NewEncoder(w).Encode(map[string]any{
 			"Items": []map[string]any{
 				{

internal/service/media_listing.go

@@ -2,7 +2,6 @@ package service
 
 import (
 	"context"
-	"sort"
 	"strings"
 	"time"
 
@@ -179,9 +178,18 @@ func (s *MediaService) listVersionSiblings(ctx context.Context, media *model.Med
 		libraryIDs = []string{media.LibraryID}
 	}
 	filter := repository.MediaQueryFilter{IncludeNSFW: true}
-	candidates, narrowed, err := s.repo.Media.ListVersionCandidates(ctx, libraryIDs, *media, 5000)
-	if err != nil {
-		return nil, err
+	// 成人条目按番号分组，而番号常常只存在于路径/标题里：本地 NFO 来源的分片
+	// 没有 douban_id/thetvdb_id（MetaTube 刮削出来的那几个才有）。若仍按外部
+	// ID 预先收窄候选集，同番号的其它分片会被 SQL 直接排除，表现就是库里折叠
+	// 出了 N 个版本、详情页却只列出带 ID 的那几个。因此成人条目不预先收窄，
+	// 直接在该库范围内比对版本键。
+	var candidates []model.Media
+	narrowed := false
+	if mediaAdultGroupCode(*media) == "" {
+		candidates, narrowed, err = s.repo.Media.ListVersionCandidates(ctx, libraryIDs, *media, 5000)
+		if err != nil {
+			return nil, err
+		}
 	}
 	if !narrowed {
 		candidates, err = s.repo.Media.ListByLibrariesFilteredNoCount(ctx, libraryIDs, 0, 5000, filter)
@@ -199,14 +207,6 @@ func (s *MediaService) listVersionSiblings(ctx context.Context, media *model.Med
 	if len(matched) == 0 {
 		return []model.Media{*media}, nil
 	}
-	sort.SliceStable(matched, func(i, j int) bool {
-		if matched[i].ID == media.ID {
-			return true
-		}
-		if matched[j].ID == media.ID {
-			return false
-		}
-		return betterMediaVersion(matched[i], matched[j])
-	})
+	sortMediaVersionsForDisplay(matched)
 	return matched, nil
 }

internal/service/media_versions.go

@@ -3,7 +3,9 @@ package service
 import (
 	"fmt"
 	"path/filepath"
+	"regexp"
 	"sort"
+	"strconv"
 	"strings"
 
 	"github.com/truewhile/MeBox/internal/model"
@@ -76,34 +78,28 @@ func groupMediaVersions(items []model.Media) []MediaItem {
 		return nil
 	}
 	type group struct {
-		key     string
-		primary model.Media
-		rows    []model.Media
+		key  string
+		rows []model.Media
 	}
 	groups := make([]group, 0, len(items))
 	byKey := make(map[string]int, len(items))
 	for _, item := range items {
 		key := mediaVersionGroupKey(item)
 		if key == "" {
-			groups = append(groups, group{primary: item, rows: []model.Media{item}})
+			groups = append(groups, group{rows: []model.Media{item}})
 			continue
 		}
 		if idx, ok := byKey[key]; ok {
 			groups[idx].rows = append(groups[idx].rows, item)
-			if betterMediaVersion(item, groups[idx].primary) {
-				groups[idx].primary = item
-			}
 			continue
 		}
 		byKey[key] = len(groups)
-		groups = append(groups, group{key: key, primary: item, rows: []model.Media{item}})
+		groups = append(groups, group{key: key, rows: []model.Media{item}})
 	}
 	out := make([]MediaItem, 0, len(groups))
 	for _, g := range groups {
-		sort.SliceStable(g.rows, func(i, j int) bool {
-			return betterMediaVersion(g.rows[i], g.rows[j])
-		})
-		item := MediaItem{Media: g.primary}
+		sortMediaVersionsForDisplay(g.rows)
+		item := MediaItem{Media: g.rows[0]}
 		if len(g.rows) > 1 {
 			item.Versions = g.rows
 		}
@@ -193,6 +189,18 @@ func mediaVersionGroupKey(m model.Media) string {
 		return mediaVersionStemGroupKey(m, libKey)
 	}
 
+	// 成人条目按番号折叠。在线刮削（MetaTube）会把番号与 provider「借用」
+	// 存进 douban_id/thetvdb_id，本地 NFO 路径则拿不到这两个字段；一旦按
+	// 外部 ID 分组，同一部片的各个分片就会因为元数据来源不同（在线刮削 vs
+	// 本地 NFO）裂成两张标题相同的卡。番号取自原文件名/路径/标题，与元数据
+	// 来源无关，因此这里统一用番号做版本身份。
+	if code := mediaAdultGroupCode(m); code != "" {
+		if libKey == "" {
+			libKey = "_"
+		}
+		return fmt.Sprintf("adult:%s:%s", libKey, code)
+	}
+
 	switch {
 	case m.TMDbID > 0:
 		if libKey != "" {
@@ -267,6 +275,44 @@ func mediaVersionGroupKey(m model.Media) string {
 	return fmt.Sprintf("movie:%s:%d", title, year)
 }
 
+// mediaAdultGroupCode 返回成人条目的番号，作为与元数据来源无关的版本身份。
+//
+// 只在已经确认是成人条目（NSFW）时才返回番号：番号本身来自原文件名/路径/
+// 标题，不会随「在线刮削（MetaTube 把番号与 provider 借用进 douban_id/
+// thetvdb_id）」还是「本地 NFO（不带外部 ID）」而改变，因此两条来源能算出
+// 同一个键。未标记 NSFW 的条目仍走标题分组，普通影视库里 "The Matrix 1999"
+// 这类文件名不会被当成番号。
+func mediaAdultGroupCode(m model.Media) string {
+	if !m.NSFW {
+		return ""
+	}
+	code := firstText(
+		normalizeAdultCode(m.OriginalName),
+		AdultCodeFromMediaPath(m.Path),
+		normalizeAdultCode(m.Title),
+	)
+	if code == "" {
+		return ""
+	}
+	return canonicalAdultGroupCode(code)
+}
+
+// canonicalAdultGroupCode 去掉番号数字部分的补零，让 IPVR-00192 与 IPVR-192
+// 这类同一部片的不同写法落到同一个分组键上。无法解析数字的番号原样返回
+// （如 FC2-PPV-4701981）。
+func canonicalAdultGroupCode(code string) string {
+	code = strings.ToUpper(strings.TrimSpace(code))
+	prefix, digits, ok := strings.Cut(code, "-")
+	if !ok {
+		return code
+	}
+	value, err := strconv.Atoi(digits)
+	if err != nil {
+		return code
+	}
+	return prefix + "-" + strconv.Itoa(value)
+}
+
 // mediaVersionStemGroupKey 按「库 + 父目录 + 文件词干」折叠多版本
 // （如 竞女01.mkv.strm 与 竞女01.mp4.strm）。
 func mediaVersionStemGroupKey(m model.Media, libKey string) string {
@@ -300,8 +346,11 @@ func mediaVersionFileStem(name string) string {
 }
 
 // MediaVersionLabel 生成版本切换展示名（分辨率 / 容器 / 编码 / 体积 / 文件名）。
+// 当只有容器等无法区分多版本的信息时，回退到清理后的文件名。
 func MediaVersionLabel(m model.Media) string {
 	parts := make([]string, 0, 4)
+	isStrm := strings.HasSuffix(strings.ToLower(strings.TrimSpace(m.Path)), ".strm") ||
+		strings.TrimSpace(m.STRMURL) != ""
 	if m.Height > 0 {
 		parts = append(parts, fmt.Sprintf("%dp", m.Height))
 	} else if m.Width > 0 {
@@ -317,17 +366,91 @@ func MediaVersionLabel(m model.Media) string {
 	if codec := strings.TrimSpace(m.VideoCodec); codec != "" {
 		parts = append(parts, strings.ToUpper(codec))
 	}
-	if m.SizeBytes > 0 {
+	// STRM 占位体积（通常几十到几百字节）不能区分分片，跳过。
+	placeholderSize := isStrm && m.SizeBytes > 0 && m.SizeBytes < 1024*1024
+	if m.SizeBytes > 0 && !placeholderSize {
 		parts = append(parts, formatMediaSize(m.SizeBytes))
 	}
-	if len(parts) > 0 {
+	if len(parts) > 0 && !mediaVersionLabelIndistinct(parts) {
 		return strings.Join(parts, " · ")
 	}
-	base := filepath.Base(strings.ReplaceAll(strings.TrimSpace(m.Path), "\\", "/"))
-	if base == "" || base == "." {
-		return firstNonEmpty(m.Title, m.OriginalName, m.ID)
+	if cleaned := cleanMediaVersionFilename(m.Path); cleaned != "" {
+		return cleaned
 	}
-	return base
+	return firstNonEmpty(m.Title, m.OriginalName, m.ID)
+}
+
+func mediaVersionLabelIndistinct(parts []string) bool {
+	if len(parts) == 0 {
+		return true
+	}
+	for _, part := range parts {
+		upper := strings.ToUpper(strings.TrimSpace(part))
+		if upper == "" || upper == "云端直链" || upper == "STRM" {
+			continue
+		}
+		if _, ok := videoExtensions["."+strings.ToLower(upper)]; ok {
+			continue
+		}
+		return false
+	}
+	return true
+}
+
+func cleanMediaVersionFilename(path string) string {
+	base := filepath.Base(strings.ReplaceAll(strings.TrimSpace(path), "\\", "/"))
+	if base == "" || base == "." {
+		return ""
+	}
+	stem := mediaFileStem(base)
+	stem = strings.ReplaceAll(stem, "_", " ")
+	stem = strings.ReplaceAll(stem, ".", " ")
+	return strings.Join(strings.Fields(stem), " ")
+}
+
+// mediaPartNumber 从路径提取分片序号（part1 / cd2 / -3）。
+// 裸后缀只认 1–2 位数字，避免把年份 2024 当成 part。
+func mediaPartNumber(path string) (int, bool) {
+	stem := mediaFileStem(filepath.Base(strings.ReplaceAll(strings.TrimSpace(path), "\\", "/")))
+	if stem == "" {
+		return 0, false
+	}
+	lower := strings.ToLower(stem)
+	for _, re := range mediaPartNumberPatterns {
+		if m := re.FindStringSubmatch(lower); len(m) == 2 {
+			n, err := strconv.Atoi(m[1])
+			if err == nil && n > 0 {
+				return n, true
+			}
+		}
+	}
+	return 0, false
+}
+
+var mediaPartNumberPatterns = []*regexp.Regexp{
+	regexp.MustCompile(`(?:^|[.\-_])part[\s._-]*(\d{1,3})$`),
+	regexp.MustCompile(`(?:^|[.\-_])(?:cd|disc|disk)[\s._-]*(\d{1,3})$`),
+	regexp.MustCompile(`[-_](\d{1,2})$`),
+}
+
+func sortMediaVersionsForDisplay(rows []model.Media) {
+	sort.SliceStable(rows, func(i, j int) bool {
+		return compareMediaVersionsForDisplay(rows[i], rows[j])
+	})
+}
+
+// compareMediaVersionsForDisplay：有分片号时按 1→2→3… 升序；否则按画质/体积择优。
+func compareMediaVersionsForDisplay(a, b model.Media) bool {
+	pa, oka := mediaPartNumber(a.Path)
+	pb, okb := mediaPartNumber(b.Path)
+	if oka && okb {
+		if pa != pb {
+			return pa < pb
+		}
+	} else if oka != okb {
+		return oka
+	}
+	return betterMediaVersion(a, b)
 }
 
 func mediaVersionContainerFromPath(path, strmURL string) string {

internal/service/media_versions_test.go

@@ -442,3 +442,298 @@ func TestMediaVersionLabelUsesContainerAndSize(t *testing.T) {
 		t.Fatalf("unexpected label %q", label)
 	}
 }
+
+func TestMediaPartNumberFromPath(t *testing.T) {
+	cases := []struct {
+		path string
+		want int
+		ok   bool
+	}{
+		{"/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm", 1, true},
+		{"/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part2.strm", 2, true},
+		{"/media/云下载/sivr-270/sivr-270-1.strm", 1, true},
+		{"/media/云下载/sivr-270/sivr-270-7.strm", 7, true},
+		{"/media/云下载/fc2/FC2PPV-4701981-cd2.strm", 2, true},
+		{"/media/Movies/Inception.2010.1080p.BluRay.x264.mkv", 0, false},
+		{"/media/Movies/Movie.2024.mkv", 0, false},
+	}
+	for _, tc := range cases {
+		got, ok := mediaPartNumber(tc.path)
+		if ok != tc.ok || got != tc.want {
+			t.Fatalf("mediaPartNumber(%q) = (%d, %v), want (%d, %v)", tc.path, got, ok, tc.want, tc.ok)
+		}
+	}
+}
+
+func TestGroupMediaVersionsSortsPartsAscending(t *testing.T) {
+	rows := []model.Media{
+		{
+			Base:      model.Base{ID: "p3"},
+			LibraryID: "cloud",
+			Title:     "SIVR-270",
+			Path:      "/media/云下载/sivr-270/sivr-270-3.strm",
+			Year:      2023,
+			NSFW:      true,
+			SizeBytes: 300,
+		},
+		{
+			Base:      model.Base{ID: "p1"},
+			LibraryID: "cloud",
+			Title:     "SIVR-270",
+			Path:      "/media/云下载/sivr-270/sivr-270-1.strm",
+			Year:      2023,
+			NSFW:      true,
+			SizeBytes: 100,
+		},
+		{
+			Base:      model.Base{ID: "p2"},
+			LibraryID: "cloud",
+			Title:     "SIVR-270",
+			Path:      "/media/云下载/sivr-270/sivr-270-2.strm",
+			Year:      2023,
+			NSFW:      true,
+			SizeBytes: 200,
+		},
+	}
+	grouped := groupMediaVersions(rows)
+	if len(grouped) != 1 || len(grouped[0].Versions) != 3 {
+		t.Fatalf("grouped = %#v", grouped)
+	}
+	want := []string{"p1", "p2", "p3"}
+	for i, id := range want {
+		if grouped[0].Versions[i].ID != id {
+			t.Fatalf("versions[%d] = %q, want %q (order %#v)", i, grouped[0].Versions[i].ID, id, grouped[0].Versions)
+		}
+	}
+	if grouped[0].ID != "p1" {
+		t.Fatalf("primary = %q, want p1 (first part)", grouped[0].ID)
+	}
+}
+
+func TestMediaVersionLabelFallsBackToFilenameWhenIndistinct(t *testing.T) {
+	label := MediaVersionLabel(model.Media{
+		Title:     "SIVR-270-【VR】河北彩花",
+		Path:      "/media/云下载/sivr-270/sivr-270-1.strm",
+		SizeBytes: 157,
+		STRMURL:   "/api/strm/play/cloud115/video.mp4?pickcode=a",
+	})
+	if !strings.Contains(label, "sivr-270-1") {
+		t.Fatalf("indistinct strm label should fall back to filename, got %q", label)
+	}
+	if strings.EqualFold(label, "MP4") || strings.Contains(label, "云端") {
+		t.Fatalf("should not keep generic-only label %q", label)
+	}
+}
+
+// SIVR-270 现场：一部分分片走在线刮削（MetaTube 把番号/provider 借用进
+// douban_id/thetvdb_id），另一部分只从本地 NFO 拿到标题（没有外部 ID）。
+// 按外部 ID 分组会把它们裂成两张标题完全相同的卡，必须按番号折成一张。
+func TestGroupMediaVersionsMergesAdultPartsAcrossMetadataSources(t *testing.T) {
+	online := model.Media{
+		Base:         model.Base{ID: "sivr-270-2"},
+		LibraryID:    "cloud",
+		Title:        "SIVR-270-【VR】河北彩花",
+		OriginalName: "SIVR-270",
+		Path:         "/media/云下载/sivr-270/sivr-270-2.strm",
+		Year:         2023,
+		NSFW:         true,
+		DoubanID:     "SIVR-270",
+		TheTVDBID:    "JavBus",
+		ScrapeStatus: "matched",
+		SizeBytes:    200,
+	}
+	fromNFO := model.Media{
+		Base:         model.Base{ID: "sivr-270-3"},
+		LibraryID:    "cloud",
+		Title:        "SIVR-270-【VR】河北彩花",
+		OriginalName: "SIVR-270",
+		Path:         "/media/云下载/sivr-270/sivr-270-3.strm",
+		Year:         2023,
+		NSFW:         true,
+		ScrapeStatus: "matched",
+		SizeBytes:    100,
+	}
+
+	grouped := groupMediaVersions([]model.Media{online, fromNFO})
+	if len(grouped) != 1 {
+		t.Fatalf("grouped len = %d, want 1: %#v", len(grouped), grouped)
+	}
+	if len(grouped[0].Versions) != 2 {
+		t.Fatalf("versions len = %d, want 2", len(grouped[0].Versions))
+	}
+	if grouped[0].Path != online.Path {
+		t.Fatalf("larger part should stay primary, got %q", grouped[0].Path)
+	}
+}
+
+func TestGroupMediaVersionsKeepsDifferentAdultCodesSeparate(t *testing.T) {
+	rows := []model.Media{
+		{
+			Base:      model.Base{ID: "sivr-270"},
+			LibraryID: "cloud",
+			Title:     "SIVR-270 作品",
+			Path:      "/media/云下载/sivr-270/sivr-270-1.strm",
+			Year:      2023,
+			NSFW:      true,
+		},
+		{
+			Base:      model.Base{ID: "sivr-271"},
+			LibraryID: "cloud",
+			Title:     "SIVR-271 作品",
+			Path:      "/media/云下载/sivr-271/sivr-271-1.strm",
+			Year:      2023,
+			NSFW:      true,
+		},
+	}
+	grouped := groupMediaVersions(rows)
+	if len(grouped) != 2 {
+		t.Fatalf("different adult codes must stay separate: %#v", grouped)
+	}
+}
+
+// 同一部片的两种写法：路径里的 IPVR-00192 与刮削回来的 IPVR-192 必须归一。
+func TestGroupMediaVersionsMergesAdultCodesIgnoringZeroPadding(t *testing.T) {
+	scraped := model.Media{
+		Base:         model.Base{ID: "ipvr-192-part2"},
+		LibraryID:    "cloud",
+		Title:        "IPVR-192-相沢みなみ",
+		OriginalName: "IPVR-192",
+		Path:         "/media/云下载/ipvr00192pl/scraped/part2.strm",
+		Year:         2022,
+		NSFW:         true,
+		ScrapeStatus: "matched",
+		SizeBytes:    200,
+	}
+	fromPath := model.Media{
+		Base:      model.Base{ID: "ipvr-00192-part1"},
+		LibraryID: "cloud",
+		Title:     "fbzip com@ipvr00192",
+		Path:      "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm",
+		Year:      2022,
+		NSFW:      true,
+		SizeBytes: 100,
+	}
+	grouped := groupMediaVersions([]model.Media{scraped, fromPath})
+	if len(grouped) != 1 || len(grouped[0].Versions) != 2 {
+		t.Fatalf("zero padded code must fold into one item: %#v", grouped)
+	}
+}
+
+func TestGroupMediaVersionsMergesAdultPartsWithBorrowedMetaTubeIDs(t *testing.T) {
+	// IPVR-00192 现场：两个 part 标题、年份完全一样，但 part2 是走 MetaTube
+	// 刮削的（番号/provider 被借用进 douban_id/thetvdb_id），part1 只有本地
+	// NFO 身份、两个字段为空。旧逻辑按外部 ID 分组会裂成两张卡。
+	part1 := model.Media{
+		Base:         model.Base{ID: "ipvr-00192-part1"},
+		LibraryID:    "cloud",
+		Title:        "IPVR-00192-IPVR-192-【VR】相沢みなみ",
+		OriginalName: "IPVR-00192",
+		Path:         "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm",
+		Year:         2022,
+		NSFW:         true,
+		ScrapeStatus: "matched",
+		SizeBytes:    100,
+	}
+	part2 := part1
+	part2.ID = "ipvr-00192-part2"
+	part2.Path = "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part2.strm"
+	part2.DoubanID = "ipvr00192"
+	part2.TheTVDBID = "JAV321"
+	part2.SizeBytes = 200
+
+	grouped := groupMediaVersions([]model.Media{part1, part2})
+	if len(grouped) != 1 {
+		t.Fatalf("grouped len = %d, want 1: %#v", len(grouped), grouped)
+	}
+	if len(grouped[0].Versions) != 2 {
+		t.Fatalf("versions len = %d, want 2", len(grouped[0].Versions))
+	}
+	if grouped[0].Versions[0].ID != "ipvr-00192-part1" || grouped[0].Versions[1].ID != "ipvr-00192-part2" {
+		t.Fatalf("versions should be part1 then part2, got %#v", grouped[0].Versions)
+	}
+}
+
+func TestGetMediaItemListsAdultVersionsAcrossMetadataSources(t *testing.T) {
+	db := newServiceTestDB(t, &model.Library{}, &model.Media{})
+	repos := repository.New(db)
+	lib := model.Library{Name: "云下载", Path: "/media/云下载", Type: "movie", Enabled: true}
+	if err := repos.Library.Create(t.Context(), &lib); err != nil {
+		t.Fatal(err)
+	}
+	rows := []model.Media{
+		{
+			// 走 MetaTube 刮削的分片：番号/provider 被借用进 douban/thetvdb。
+			LibraryID:    lib.ID,
+			Title:        "SIVR-270-【VR】河北彩花",
+			OriginalName: "SIVR-270",
+			Path:         "/media/云下载/sivr-270/sivr-270-1.strm",
+			Year:         2023,
+			NSFW:         true,
+			DoubanID:     "SIVR-270",
+			TheTVDBID:    "JavBus",
+			ScrapeStatus: "matched",
+			SizeBytes:    200,
+		},
+		{
+			// 只有本地 NFO 身份的分片：两个外部 ID 都为空。
+			LibraryID:    lib.ID,
+			Title:        "SIVR-270-【VR】河北彩花",
+			OriginalName: "SIVR-270",
+			Path:         "/media/云下载/sivr-270/sivr-270-4.strm",
+			Year:         2023,
+			NSFW:         true,
+			ScrapeStatus: "matched",
+			SizeBytes:    100,
+		},
+	}
+	if err := db.Create(&rows).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos).
+		SetRuntimeCache(NewRuntimeCacheService(&config.Config{}, zap.NewNop()))
+	item, err := svc.GetMediaItem(t.Context(), rows[0].ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if item == nil || len(item.Versions) != 2 {
+		// 详情页版本列表不能只按外部 ID 收窄，否则没有 ID 的分片会消失。
+		t.Fatalf("versions = %#v, want both parts", item)
+	}
+}
+
+func TestMediaAdultGroupCodeRequiresNSFW(t *testing.T) {
+	cases := []struct {
+		name string
+		m    model.Media
+		want string
+	}{
+		{
+			name: "普通影片名里的字母+数字不当番号",
+			m:    model.Media{Title: "Spider-Man 2008 1080p", Path: "/media/Movies/Spider-Man 2008 1080p.mkv"},
+			want: "",
+		},
+		{
+			name: "未识别成人的条目即使文件名像番号也不折叠",
+			m:    model.Media{Title: "SIVR-270", Path: "/media/云下载/sivr-270/sivr-270-1.strm"},
+			want: "",
+		},
+		{
+			name: "已标记 NSFW 时按番号分组",
+			m:    model.Media{NSFW: true, Title: "sivr 270", Path: "/media/云下载/sivr-270/sivr-270-1.strm"},
+			want: "SIVR-270",
+		},
+		{
+			name: "站点前缀里带补零的番号会归一",
+			m:    model.Media{NSFW: true, Title: "fbzip com@ipvr00192", Path: "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm"},
+			want: "IPVR-192",
+		},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := mediaAdultGroupCode(tc.m); got != tc.want {
+				t.Fatalf("mediaAdultGroupCode = %q, want %q", got, tc.want)
+			}
+		})
+	}
+}

internal/service/nfo.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strconv"
 	"strings"
 
 	"go.uber.org/zap"
@@ -48,9 +49,13 @@ type movieNFO struct {
 	Poster   string   `xml:"thumb,omitempty"`
 	Fanart   string   `xml:"fanart,omitempty"`
 	TMDb     int      `xml:"tmdbid,omitempty"`
-	Genre    []string `xml:"genre,omitempty"`
-	Country  []string `xml:"country,omitempty"`
-	Language []string `xml:"language,omitempty"`
+	// UniqueIDs 让 sidecar 能把 MeBox 自己用的外部 ID 原样带回来。缺了它，
+	// 「在线刮削 → 写 NFO → 重扫读 NFO」会丢掉 douban/thetvdb（成人条目借用
+	// 这两个字段存番号/provider），同一部片的两条来源就会算出不同的版本键。
+	UniqueIDs []nfoUniqueID `xml:"uniqueid,omitempty"`
+	Genre     []string      `xml:"genre,omitempty"`
+	Country   []string      `xml:"country,omitempty"`
+	Language  []string      `xml:"language,omitempty"`
 }
 
 type episodeNFO struct {
@@ -167,17 +172,18 @@ func WriteMediaNFO(m *model.Media) (string, error) {
 			}
 		}
 		doc = movieNFO{
-			Title:    title,
-			Original: original,
-			Year:     m.Year,
-			Plot:     m.Overview,
-			Rating:   m.Rating,
-			Poster:   m.PosterURL,
-			Fanart:   m.BackdropURL,
-			TMDb:     m.TMDbID,
-			Genre:    splitNFOList(m.Genres),
-			Country:  splitNFOList(m.Countries),
-			Language: splitNFOList(m.Languages),
+			Title:     title,
+			Original:  original,
+			Year:      m.Year,
+			Plot:      m.Overview,
+			Rating:    m.Rating,
+			Poster:    m.PosterURL,
+			Fanart:    m.BackdropURL,
+			TMDb:      m.TMDbID,
+			UniqueIDs: nfoExternalUniqueIDs(m),
+			Genre:     splitNFOList(m.Genres),
+			Country:   splitNFOList(m.Countries),
+			Language:  splitNFOList(m.Languages),
 		}
 	}
 	out, err := xml.MarshalIndent(doc, "", "  ")
@@ -202,3 +208,27 @@ func splitNFOList(value string) []string {
 	}
 	return out
 }
+
+// nfoExternalUniqueIDs 把 MeBox 使用的外部 ID 写进 sidecar，供自己重扫时读回
+// （metadataFromDoc 会按 type 还原成 bangumi/douban/thetvdb 字段）。
+// TMDb 走 <tmdbid>，单集 NFO 不写唯一 ID：单集 ID 属于单集，写进整剧身份会把
+// 同一部剧拆成多张卡（见 mergeEpisodeMetadata 的约束说明）。
+func nfoExternalUniqueIDs(m *model.Media) []nfoUniqueID {
+	if m == nil {
+		return nil
+	}
+	out := make([]nfoUniqueID, 0, 3)
+	if m.BangumiID > 0 {
+		out = append(out, nfoUniqueID{Type: "bangumi", Value: strconv.Itoa(m.BangumiID)})
+	}
+	if id := strings.TrimSpace(m.DoubanID); id != "" {
+		out = append(out, nfoUniqueID{Type: "douban", Value: id})
+	}
+	if id := strings.TrimSpace(m.TheTVDBID); id != "" {
+		out = append(out, nfoUniqueID{Type: "thetvdb", Value: id})
+	}
+	if len(out) == 0 {
+		return nil
+	}
+	return out
+}

internal/service/nfo_test.go

@@ -100,3 +100,51 @@ func TestWriteMediaNFOAdultTitleWithCode(t *testing.T) {
 		t.Fatalf("expected originaltitle with code, got:\n%s", text)
 	}
 }
+
+func TestWriteMediaNFORoundTripsExternalUniqueIDs(t *testing.T) {
+	root := t.TempDir()
+	mediaPath := filepath.Join(root, "云下载", "sivr-270", "sivr-270-1.strm")
+	if err := os.MkdirAll(filepath.Dir(mediaPath), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(mediaPath, []byte("strm"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	dst, err := WriteMediaNFO(&model.Media{
+		Title:        "SIVR-270-河北彩花",
+		OriginalName: "SIVR-270",
+		Path:         mediaPath,
+		Year:         2023,
+		NSFW:         true,
+		DoubanID:     "SIVR-270",
+		TheTVDBID:    "JavBus",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	body, err := os.ReadFile(dst)
+	if err != nil {
+		t.Fatal(err)
+	}
+	text := string(body)
+	// 成人条目把番号/provider 借用存在 douban/thetvdb 两列；sidecar 必须把它们
+	// 带回来，否则「在线刮削 → 写 NFO → 重扫读 NFO」之后同一部片会被按不同
+	// 分组键拆成多张卡。
+	for _, want := range []string{
+		`<uniqueid type="douban">SIVR-270</uniqueid>`,
+		`<uniqueid type="thetvdb">JavBus</uniqueid>`,
+	} {
+		if !strings.Contains(text, want) {
+			t.Fatalf("sidecar missing %s, got:\n%s", want, text)
+		}
+	}
+
+	meta, err := ReadLocalMetadata(mediaPath, "", false)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if meta == nil || meta.DoubanID != "SIVR-270" || meta.TheTVDBID != "JavBus" {
+		t.Fatalf("external ids did not round trip: %#v", meta)
+	}
+}

internal/service/profile.go

@@ -144,6 +144,85 @@ func (p *ProfileService) SetPinnedLibraryIDs(ctx context.Context, userID string,
 	return normalized, nil
 }
 
+// GetLibraryTags returns the user's library tag groups, filtered to libraries
+// the user can still access. Empty tags are kept so an editor does not lose a
+// tag that was just created.
+func (p *ProfileService) GetLibraryTags(ctx context.Context, userID string) ([]model.LibraryTagSet, error) {
+	user, err := p.repo.User.FindByID(ctx, userID)
+	if err != nil {
+		return nil, err
+	}
+	if user == nil {
+		return nil, errors.New("user not found")
+	}
+	tags := model.NormalizeLibraryTags(user.DecodeLibraryTags())
+	if len(tags) == 0 {
+		return []model.LibraryTagSet{}, nil
+	}
+	visibility := UserDefaultMediaVisibility(ctx, p.repo, userID)
+	accessible, err := p.accessibleLibraryIDSet(ctx, visibility)
+	if err != nil {
+		return nil, err
+	}
+	for i := range tags {
+		tags[i].LibraryIDs = filterPinnedLibraryIDs(tags[i].LibraryIDs, accessible)
+		if tags[i].LibraryIDs == nil {
+			tags[i].LibraryIDs = []string{}
+		}
+	}
+	return tags, nil
+}
+
+// SetLibraryTags persists the user's library tag groups after dropping
+// inaccessible libraries. A library belongs to at most one tag: the first tag
+// that lists it wins, so the saved state always matches the tab UI.
+func (p *ProfileService) SetLibraryTags(ctx context.Context, userID string, tags []model.LibraryTagSet) ([]model.LibraryTagSet, error) {
+	if userID == "" {
+		return nil, errors.New("missing user id")
+	}
+	user, err := p.repo.User.FindByID(ctx, userID)
+	if err != nil {
+		return nil, err
+	}
+	if user == nil {
+		return nil, errors.New("user not found")
+	}
+	visibility := UserDefaultMediaVisibility(ctx, p.repo, userID)
+	accessible, err := p.accessibleLibraryIDSet(ctx, visibility)
+	if err != nil {
+		return nil, err
+	}
+	normalized := model.NormalizeLibraryTags(tags)
+	if len(normalized) > model.MaxLibraryTags {
+		normalized = normalized[:model.MaxLibraryTags]
+	}
+	claimed := make(map[string]struct{})
+	for i := range normalized {
+		filtered := make([]string, 0, len(normalized[i].LibraryIDs))
+		for _, id := range filterPinnedLibraryIDs(normalized[i].LibraryIDs, accessible) {
+			if _, taken := claimed[id]; taken {
+				continue
+			}
+			claimed[id] = struct{}{}
+			filtered = append(filtered, id)
+		}
+		normalized[i].LibraryIDs = filtered
+	}
+	raw, err := model.EncodeLibraryTags(normalized)
+	if err != nil {
+		return nil, err
+	}
+	if err := p.repo.User.UpdateFields(ctx, userID, map[string]any{
+		"library_tags": raw,
+	}); err != nil {
+		return nil, err
+	}
+	if normalized == nil {
+		normalized = []model.LibraryTagSet{}
+	}
+	return normalized, nil
+}
+
 func (p *ProfileService) accessibleLibraryIDSet(ctx context.Context, visibility MediaVisibility) (map[string]struct{}, error) {
 	libs, err := p.repo.Library.List(ctx)
 	if err != nil {

internal/service/profile_library_tags_test.go

@@ -0,0 +1,150 @@
+package service
+
+import (
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+	"go.uber.org/zap"
+)
+
+func TestProfileLibraryTagsFiltersInaccessibleAndKeepsOneTagPerLibrary(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.AutoMigrate(&model.User{}, &model.Library{}, &model.EmbyMount{}); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	svc := NewProfileService(zap.NewNop(), repos)
+
+	user := &model.User{Username: "viewer", PasswordHash: "hash", Role: "user"}
+	if err := repos.User.Create(t.Context(), user); err != nil {
+		t.Fatal(err)
+	}
+	libA := &model.Library{Name: "Movies", Path: "/media/movies", Type: "movie", Enabled: true}
+	libB := &model.Library{Name: "TV", Path: "/media/tv", Type: "tv", Enabled: true}
+	libHidden := &model.Library{Name: "Adult", Path: "/media/adult", Type: "movie", Enabled: true}
+	for _, lib := range []*model.Library{libA, libB, libHidden} {
+		if err := repos.Library.Create(t.Context(), lib); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := repos.User.UpdateFields(t.Context(), user.ID, map[string]any{
+		"allowed_library_ids": `["` + libA.ID + `","` + libB.ID + `"]`,
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := svc.SetLibraryTags(t.Context(), user.ID, []model.LibraryTagSet{
+		{Name: " 热门 ", LibraryIDs: []string{libA.ID, libHidden.ID, "missing", libA.ID}},
+		{Name: "热门", LibraryIDs: []string{libB.ID, libA.ID}},
+		{Name: "", LibraryIDs: []string{libB.ID}},
+	})
+	if err != nil {
+		t.Fatalf("SetLibraryTags: %v", err)
+	}
+	if len(got) != 1 {
+		t.Fatalf("SetLibraryTags returned %d tags, want 1 (%#v)", len(got), got)
+	}
+	if got[0].Name != "热门" {
+		t.Fatalf("tag name = %q, want 热门", got[0].Name)
+	}
+	// libA 已在第一个标签里占位，第二个标签里的 libA 应被丢弃。
+	want := []string{libA.ID, libB.ID}
+	if len(got[0].LibraryIDs) != len(want) {
+		t.Fatalf("tag ids = %v, want %v", got[0].LibraryIDs, want)
+	}
+	for i := range want {
+		if got[0].LibraryIDs[i] != want[i] {
+			t.Fatalf("tag ids = %v, want %v", got[0].LibraryIDs, want)
+		}
+	}
+
+	loaded, err := svc.GetLibraryTags(t.Context(), user.ID)
+	if err != nil {
+		t.Fatalf("GetLibraryTags: %v", err)
+	}
+	if len(loaded) != 1 || loaded[0].Name != "热门" || len(loaded[0].LibraryIDs) != len(want) {
+		t.Fatalf("GetLibraryTags = %#v, want one tag with %v", loaded, want)
+	}
+}
+
+func TestProfileLibraryTagsKeepsEmptyTagAndMountedEmby(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.AutoMigrate(&model.User{}, &model.Library{}, &model.EmbyMount{}); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	svc := NewProfileService(zap.NewNop(), repos)
+
+	user := &model.User{Username: "viewer", PasswordHash: "hash", Role: "user"}
+	if err := repos.User.Create(t.Context(), user); err != nil {
+		t.Fatal(err)
+	}
+	mount := &model.EmbyMount{
+		AccountID:      "acct-1",
+		RemoteViewID:   "view-42",
+		RemoteViewName: "Remote Movies",
+		Enabled:        true,
+	}
+	if err := repos.EmbyMount.Create(t.Context(), mount); err != nil {
+		t.Fatal(err)
+	}
+	remoteID := EncodeEmbyRemoteID(mount.ID, mount.RemoteViewID)
+
+	got, err := svc.SetLibraryTags(t.Context(), user.ID, []model.LibraryTagSet{
+		{Name: "远程", LibraryIDs: []string{remoteID, "embyremote~missing~view"}},
+		{Name: "以后再用", LibraryIDs: []string{}},
+	})
+	if err != nil {
+		t.Fatalf("SetLibraryTags: %v", err)
+	}
+	if len(got) != 2 {
+		t.Fatalf("SetLibraryTags = %#v, want 2 tags", got)
+	}
+	if len(got[0].LibraryIDs) != 1 || got[0].LibraryIDs[0] != remoteID {
+		t.Fatalf("remote tag ids = %v, want [%s]", got[0].LibraryIDs, remoteID)
+	}
+	if got[1].Name != "以后再用" || len(got[1].LibraryIDs) != 0 {
+		t.Fatalf("empty tag should survive as-is, got %#v", got[1])
+	}
+
+	loaded, err := svc.GetLibraryTags(t.Context(), user.ID)
+	if err != nil {
+		t.Fatalf("GetLibraryTags: %v", err)
+	}
+	if len(loaded) != 2 || len(loaded[1].LibraryIDs) != 0 {
+		t.Fatalf("GetLibraryTags = %#v, want the empty tag preserved", loaded)
+	}
+}
+
+func TestProfileLibraryTagsEmptyStateReturnsEmptySlice(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.AutoMigrate(&model.User{}, &model.Library{}, &model.EmbyMount{}); err != nil {
+		t.Fatal(err)
+	}
+	repos := repository.New(db)
+	svc := NewProfileService(zap.NewNop(), repos)
+
+	user := &model.User{Username: "viewer", PasswordHash: "hash", Role: "user"}
+	if err := repos.User.Create(t.Context(), user); err != nil {
+		t.Fatal(err)
+	}
+	if tags, err := svc.GetLibraryTags(t.Context(), user.ID); err != nil || tags == nil || len(tags) != 0 {
+		t.Fatalf("GetLibraryTags = %#v, %v; want empty non-nil slice", tags, err)
+	}
+	if tags, err := svc.SetLibraryTags(t.Context(), user.ID, nil); err != nil || tags == nil || len(tags) != 0 {
+		t.Fatalf("SetLibraryTags(nil) = %#v, %v; want empty non-nil slice", tags, err)
+	}
+}

web/src/api/profile.ts

@@ -1,5 +1,5 @@
 import { api } from './client'
-import type { User } from '../types'
+import type { LibraryTagSet, User } from '../types'
 
 export const profileAPI = {
   get: () => api.get<User>('/me').then((r) => r.data),
@@ -21,6 +21,12 @@ export const profileAPI = {
   setPinnedLibraries: (libraryIds: string[]) =>
     api.put<{ library_ids: string[] }>('/me/pinned-libraries', { library_ids: libraryIds }).then((r) => r.data.library_ids ?? []),
 
+  getLibraryTags: () =>
+    api.get<{ tags: LibraryTagSet[] | null }>('/me/library-tags').then((r) => r.data.tags ?? []),
+
+  setLibraryTags: (tags: LibraryTagSet[]) =>
+    api.put<{ tags: LibraryTagSet[] | null }>('/me/library-tags', { tags }).then((r) => r.data.tags ?? []),
+
   adminUpdateRole: (id: string, role: 'admin' | 'user') =>
     api.patch<User>(`/admin/users/${id}/role`, { role }).then((r) => r.data),
 }

web/src/components/LibraryListSortDropdown.tsx

@@ -0,0 +1,108 @@
+import { useEffect, useRef, useState } from 'react'
+import { ArrowDown, ArrowUp, ArrowUpDown, Check } from 'lucide-react'
+
+import {
+  LIBRARY_LIST_SORT_OPTIONS,
+  type LibraryListSortField,
+  type LibraryListSortOption,
+  type LibraryListSortOrder,
+} from '../utils/libraryListSort'
+
+type LibraryListSortDropdownProps = {
+  value: LibraryListSortField
+  order: LibraryListSortOrder
+  onChange: (field: LibraryListSortField, order: LibraryListSortOrder) => void
+  className?: string
+}
+
+export function LibraryListSortDropdown({
+  value,
+  order,
+  onChange,
+  className = '',
+}: LibraryListSortDropdownProps) {
+  const [isOpen, setIsOpen] = useState(false)
+  const dropdownRef = useRef<HTMLDivElement>(null)
+  const currentOption = LIBRARY_LIST_SORT_OPTIONS.find((opt) => opt.id === value) ?? LIBRARY_LIST_SORT_OPTIONS[0]
+
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
+        setIsOpen(false)
+      }
+    }
+    if (isOpen) {
+      document.addEventListener('mousedown', handleClickOutside)
+    }
+    return () => {
+      document.removeEventListener('mousedown', handleClickOutside)
+    }
+  }, [isOpen])
+
+  const handleSelect = (option: LibraryListSortOption) => {
+    if (value === option.id) {
+      onChange(option.id, order === 'asc' ? 'desc' : 'asc')
+    } else {
+      onChange(option.id, option.defaultOrder)
+    }
+    setIsOpen(false)
+  }
+
+  return (
+    <div className={`relative inline-block text-left ${className}`} ref={dropdownRef}>
+      <button
+        type="button"
+        onClick={() => setIsOpen((prev) => !prev)}
+        className="inline-flex h-9 items-center gap-1.5 rounded-xl border border-sand-200 bg-white/90 px-3 py-1.5 text-xs font-semibold text-ink-600 shadow-sm transition-all hover:border-brand-300 hover:bg-brand-50/50 hover:text-brand-700 sm:h-10 sm:text-sm"
+        title="更改媒体库列表排序"
+      >
+        <ArrowUpDown size={14} className="text-sand-500" />
+        <span>排序: {currentOption.label}</span>
+        {order === 'asc' ? (
+          <ArrowUp size={13} className="font-bold text-brand-600" />
+        ) : (
+          <ArrowDown size={13} className="font-bold text-brand-600" />
+        )}
+      </button>
+
+      {isOpen && (
+        <div className="absolute left-0 z-50 mt-1.5 w-44 max-w-[calc(100vw-2rem)] origin-top-left rounded-2xl border border-sand-200/80 bg-white/95 p-1.5 shadow-xl backdrop-blur-md transition-all animate-in fade-in-0 zoom-in-95 sm:left-auto sm:right-0 sm:origin-top-right">
+          <div className="border-b border-sand-100 px-2.5 py-1.5 text-[11px] font-bold text-sand-500">
+            排序方式
+          </div>
+          <div className="space-y-0.5 py-1">
+            {LIBRARY_LIST_SORT_OPTIONS.map((option) => {
+              const isSelected = value === option.id
+              return (
+                <button
+                  key={option.id}
+                  type="button"
+                  onClick={() => handleSelect(option)}
+                  className={`flex w-full items-center justify-between rounded-xl px-3 py-2 text-xs font-medium transition-colors ${
+                    isSelected
+                      ? 'bg-brand-50 font-semibold text-brand-700'
+                      : 'text-ink-600 hover:bg-sand-50 hover:text-brand-600'
+                  }`}
+                >
+                  <div className="flex items-center gap-2">
+                    {isSelected && <Check size={13} className="text-brand-600" />}
+                    <span className={isSelected ? '' : 'pl-5'}>{option.label}</span>
+                  </div>
+                  {isSelected && (
+                    <div className="flex items-center text-brand-600">
+                      {order === 'asc' ? (
+                        <ArrowUp size={14} className="stroke-[2.5]" />
+                      ) : (
+                        <ArrowDown size={14} className="stroke-[2.5]" />
+                      )}
+                    </div>
+                  )}
+                </button>
+              )
+            })}
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}

web/src/components/LibraryTagBar.tsx

@@ -0,0 +1,165 @@
+import { useEffect, useMemo, useRef, useState } from 'react'
+import { Layers, Plus, Settings2, X } from 'lucide-react'
+
+import { MAX_LIBRARY_TAGS } from '../utils/libraryTags'
+import type { LibraryTagTab } from '../utils/libraryTags'
+
+/**
+ * 媒体库标签栏：固定「全部」+ 每个标签一个页签，选中后只展示该标签下的媒体库。
+ * 只是管理员/普通用户都能用的展示层过滤，不改动媒体库本身。
+ * 标签顺序由「管理标签」里的拖拽决定，这里只负责展示与选中。
+ */
+export function LibraryTagBar({
+  tabs,
+  selectedTagId,
+  onSelect,
+  onCreate,
+  onManage,
+  manageLabel = '管理标签',
+  showCreate = true,
+  busy = false,
+}: {
+  tabs: LibraryTagTab[]
+  selectedTagId: string
+  onSelect: (tagId: string) => void
+  onCreate?: (name: string) => void
+  onManage?: () => void
+  manageLabel?: string
+  showCreate?: boolean
+  busy?: boolean
+}) {
+  const [creating, setCreating] = useState(false)
+  const [draft, setDraft] = useState('')
+  const inputRef = useRef<HTMLInputElement | null>(null)
+  // 同一帧内 blur 与 Enter 都可能触发提交：用一个标记保证只提交一次。
+  const submittedRef = useRef(false)
+
+  useEffect(() => {
+    if (creating) {
+      submittedRef.current = false
+      inputRef.current?.focus()
+    }
+  }, [creating])
+
+  const hasTags = useMemo(() => tabs.some((tab) => !tab.isAll), [tabs])
+
+  const submit = () => {
+    if (submittedRef.current) return
+    submittedRef.current = true
+    const name = draft.trim()
+    setDraft('')
+    setCreating(false)
+    if (!name) return
+    onCreate?.(name)
+  }
+
+  const cancel = () => {
+    submittedRef.current = true
+    setDraft('')
+    setCreating(false)
+  }
+
+  return (
+    <div className="flex flex-wrap items-center gap-2 border-b border-[var(--app-border)] pb-3">
+      <div className="flex flex-wrap items-center gap-1.5">
+        {tabs.map((tab) => {
+          const active = tab.id === selectedTagId
+          return (
+            <button
+              key={tab.id}
+              type="button"
+              onClick={() => onSelect(tab.id)}
+              aria-pressed={active}
+              className={`inline-flex items-center gap-1.5 rounded-xl border px-3 py-1.5 text-xs font-bold transition-colors ${
+                active
+                  ? 'border-brand-500/60 bg-brand-500/10 text-brand-600'
+                  : 'border-[var(--app-border)] bg-[var(--app-panel-soft)] text-[var(--app-subtle)] hover:border-brand-500/40 hover:text-[var(--app-text)]'
+              }`}
+              title={tab.isAll ? '显示全部媒体库' : `只看「${tab.name}」标签下的媒体库`}
+            >
+              {tab.isAll && <Layers size={13} />}
+              <span className="max-w-[8rem] truncate">{tab.name}</span>
+              <span className={`font-mono text-[10px] ${active ? 'text-brand-500' : 'text-[var(--app-muted)]'}`}>
+                {tab.count}
+              </span>
+            </button>
+          )
+        })}
+      </div>
+
+      {(showCreate || onManage) && (
+        <div className="flex flex-wrap items-center gap-1.5">
+          {showCreate && onCreate && (creating || !hasTags) && (
+            <div className="inline-flex items-center gap-1 rounded-xl border border-[var(--app-border)] bg-[var(--app-panel-soft)] px-2 py-1">
+              <input
+                ref={inputRef}
+                value={draft}
+                onChange={(event) => setDraft(event.target.value)}
+                onKeyDown={(event) => {
+                  if (event.key === 'Enter') {
+                    event.preventDefault()
+                    submit()
+                  }
+                  if (event.key === 'Escape') {
+                    event.preventDefault()
+                    setDraft('')
+                    setCreating(false)
+                  }
+                }}
+                onBlur={() => submit()}
+                maxLength={24}
+                placeholder="新标签名"
+                className="h-6 w-24 bg-transparent text-xs font-semibold text-[var(--app-text)] outline-none placeholder:text-[var(--app-muted)]"
+                title={`最多 24 个字，当前最多 ${MAX_LIBRARY_TAGS} 个标签`}
+              />
+              <button
+                type="button"
+                onMouseDown={(event) => event.preventDefault()}
+                onClick={submit}
+                disabled={busy || !draft.trim()}
+                className="rounded-lg p-1 text-brand-500 transition-colors hover:bg-[var(--app-hover)] disabled:opacity-40"
+                title="创建标签"
+              >
+                <Plus size={13} />
+              </button>
+              <button
+                type="button"
+                onMouseDown={(event) => event.preventDefault()}
+                onClick={cancel}
+                className="rounded-lg p-1 text-[var(--app-muted)] transition-colors hover:bg-[var(--app-hover)]"
+                title="取消"
+              >
+                <X size={13} />
+              </button>
+            </div>
+          )}
+
+          {showCreate && onCreate && !creating && hasTags && (
+            <button
+              type="button"
+              onClick={() => setCreating(true)}
+              disabled={busy || tabs.length - 1 >= MAX_LIBRARY_TAGS}
+              className="inline-flex items-center gap-1 rounded-xl border border-dashed border-[var(--app-border)] px-2.5 py-1.5 text-xs font-bold text-[var(--app-muted)] transition-colors hover:border-brand-500/50 hover:text-brand-500 disabled:opacity-40"
+              title="新建标签"
+            >
+              <Plus size={13} />
+              <span>新建标签</span>
+            </button>
+          )}
+
+          {onManage && (
+            <button
+              type="button"
+              onClick={onManage}
+              className="inline-flex items-center gap-1 rounded-xl border border-[var(--app-border)] bg-[var(--app-panel-soft)] px-2.5 py-1.5 text-xs font-bold text-[var(--app-subtle)] transition-colors hover:border-brand-500/40 hover:text-brand-500"
+              title="重命名 / 删除标签，调整标签下的媒体库，拖拽排序"
+            >
+              <Settings2 size={13} />
+              <span>{manageLabel}</span>
+            </button>
+          )}
+        </div>
+      )}
+    </div>
+  )
+}

web/src/components/ManageLibraryTagsDialogView.tsx

@@ -0,0 +1,520 @@
+import { useCallback, useEffect, useMemo, useState } from 'react'
+import { Check, GripVertical, Loader2, Pencil, Plus, Tag, Trash2, X } from 'lucide-react'
+import toast from 'react-hot-toast'
+
+import { confirmAction } from './confirmAction'
+import type { Library } from '../types'
+import { useDragReorder } from '../hooks/useDragReorder'
+import {
+  MAX_LIBRARY_TAGS,
+  filterLibrariesForTagging,
+  normalizeTagName,
+  tagNameError,
+  type LibraryTag,
+} from '../utils/libraryTags'
+
+export type ManageLibraryTagsDialogProps = {
+  tags: LibraryTag[]
+  libraries: Library[]
+  saving: boolean
+  onCreate: (name: string) => Promise<string>
+  onRename: (from: string, to: string) => Promise<void>
+  onRemove: (name: string) => Promise<void>
+  /** 按给定标签名顺序重排标签（拖拽排序的落点）。 */
+  onReorder: (orderedNames: string[]) => Promise<void>
+  /** 单个媒体库归类；tagName 为空表示移出所有标签。 */
+  onAssign: (libraryId: string, tagName: string) => Promise<void>
+  /** 批量归类；tagName 为空表示批量移出所有标签。一次写入。 */
+  onAssignBatch: (libraryIds: string[], tagName: string) => Promise<void>
+  onClose: () => void
+}
+
+/** 「未分类」在筛选/批量目标里的哨兵值，与标签名不会冲突。 */
+const UNTAGGED = '__untagged__'
+
+/**
+ * 标签管理对话框：左侧维护标签（新建 / 重命名 / 删除），右侧把媒体库归入
+ * 某个标签。一个媒体库同时只属于一个标签，未选择即为「未分类」。
+ *
+ * 右侧支持搜索、按当前标签筛选、多选后一次性批量归类，避免逐条点击下拉框。
+ */
+export function ManageLibraryTagsDialogView({
+  tags,
+  libraries,
+  saving,
+  onCreate,
+  onRename,
+  onRemove,
+  onReorder,
+  onAssign,
+  onAssignBatch,
+  onClose,
+}: ManageLibraryTagsDialogProps) {
+  const [draftName, setDraftName] = useState('')
+  const [renaming, setRenaming] = useState('')
+  const [renameDraft, setRenameDraft] = useState('')
+  const [busyLibrary, setBusyLibrary] = useState('')
+  const [keyword, setKeyword] = useState('')
+  const [tagFilter, setTagFilter] = useState('')
+  const [selectedIds, setSelectedIds] = useState<string[]>([])
+  const [batchTag, setBatchTag] = useState('')
+  const [applying, setApplying] = useState(false)
+  const { draggingId, dragOverId, dragProps } = useDragReorder(
+    tags.map((tag) => tag.name),
+    onReorder,
+  )
+
+  useEffect(() => {
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.key === 'Escape') onClose()
+    }
+    window.addEventListener('keydown', onKeyDown)
+    return () => window.removeEventListener('keydown', onKeyDown)
+  }, [onClose])
+
+  const tagByLibrary = useMemo(() => {
+    const map = new Map<string, string>()
+    for (const tag of tags) {
+      for (const id of tag.library_ids) {
+        if (!map.has(id)) map.set(id, tag.name)
+      }
+    }
+    return map
+  }, [tags])
+
+  // 标签被删除/重命名后，批量目标与筛选值可能已经失效，落回默认项。
+  useEffect(() => {
+    if (batchTag && batchTag !== UNTAGGED && !tags.some((tag) => tag.name === batchTag)) {
+      setBatchTag('')
+    }
+    if (tagFilter && tagFilter !== UNTAGGED && !tags.some((tag) => tag.name === tagFilter)) {
+      setTagFilter('')
+    }
+  }, [tags, batchTag, tagFilter])
+
+  // 媒体库被删除后清掉已选项，避免批量应用时带着不存在的 ID。
+  useEffect(() => {
+    const available = new Set(libraries.map((lib) => lib.id))
+    setSelectedIds((prev) => {
+      const next = prev.filter((id) => available.has(id))
+      return next.length === prev.length ? prev : next
+    })
+  }, [libraries])
+
+  const visibleLibraries = useMemo(() => {
+    const searched = filterLibrariesForTagging(libraries, keyword)
+    if (!tagFilter) return searched
+    return searched.filter((lib) => {
+      const current = tagByLibrary.get(lib.id) ?? ''
+      return tagFilter === UNTAGGED ? current === '' : current === tagFilter
+    })
+  }, [libraries, keyword, tagFilter, tagByLibrary])
+
+  const selectedSet = useMemo(() => new Set(selectedIds), [selectedIds])
+  const visibleSelectedCount = visibleLibraries.reduce(
+    (sum, lib) => sum + (selectedSet.has(lib.id) ? 1 : 0),
+    0,
+  )
+  const allVisibleSelected = visibleLibraries.length > 0 && visibleSelectedCount === visibleLibraries.length
+
+  const toggleLibrary = useCallback((libraryId: string) => {
+    setSelectedIds((prev) =>
+      prev.includes(libraryId) ? prev.filter((id) => id !== libraryId) : [...prev, libraryId],
+    )
+  }, [])
+
+  const toggleVisible = useCallback(() => {
+    const visibleIds = visibleLibraries.map((lib) => lib.id)
+    setSelectedIds((prev) => {
+      const current = new Set(prev)
+      const everySelected = visibleIds.length > 0 && visibleIds.every((id) => current.has(id))
+      if (everySelected) return prev.filter((id) => !visibleIds.includes(id))
+      for (const id of visibleIds) current.add(id)
+      return Array.from(current)
+    })
+  }, [visibleLibraries])
+
+  const handleCreate = async () => {
+    const error = tagNameError(draftName, tags)
+    if (error) {
+      toast.error(error)
+      return
+    }
+    if (tags.length >= MAX_LIBRARY_TAGS) {
+      toast.error(`最多 ${MAX_LIBRARY_TAGS} 个标签`)
+      return
+    }
+    const created = await onCreate(normalizeTagName(draftName))
+    if (created) {
+      setDraftName('')
+      toast.success(`标签「${created}」已创建`)
+    } else {
+      toast.error('标签创建失败')
+    }
+  }
+
+  const handleRename = async (from: string) => {
+    const error = tagNameError(renameDraft, tags, from)
+    if (error) {
+      toast.error(error)
+      return
+    }
+    await onRename(from, renameDraft)
+    setRenaming('')
+    setRenameDraft('')
+  }
+
+  const handleRemove = async (tag: LibraryTag) => {
+    const confirmed = await confirmAction({
+      title: '删除标签',
+      message: `确定删除标签「${tag.name}」？\n媒体库本身不会被删除，只会回到「未分类」。`,
+      confirmText: '删除',
+    })
+    if (!confirmed) return
+    await onRemove(tag.name)
+  }
+
+  const handleAssign = async (library: Library, tagName: string) => {
+    setBusyLibrary(library.id)
+    try {
+      await onAssign(library.id, tagName)
+    } finally {
+      setBusyLibrary('')
+    }
+  }
+
+  const handleApplyBatch = async () => {
+    if (selectedIds.length === 0 || applying) return
+    setApplying(true)
+    try {
+      await onAssignBatch(selectedIds, batchTag)
+      const count = selectedIds.length
+      toast.success(
+        batchTag ? `已将 ${count} 个媒体库归入「${batchTag}」` : `已将 ${count} 个媒体库移出标签`,
+      )
+      setSelectedIds([])
+    } finally {
+      setApplying(false)
+    }
+  }
+
+  const busy = saving || applying
+
+  return (
+    <div
+      className="fixed inset-0 z-[100] flex items-center justify-center bg-black/35 p-2 backdrop-blur-sm sm:p-4"
+      onClick={onClose}
+    >
+      <div
+        role="dialog"
+        aria-modal="true"
+        className="flex h-[calc(100dvh-1rem)] w-full max-w-5xl flex-col overflow-hidden rounded-2xl border border-white/70 bg-[var(--app-panel)] shadow-2xl sm:h-[82vh] sm:rounded-3xl"
+        onClick={(event) => event.stopPropagation()}
+      >
+        <div className="flex items-center justify-between border-b border-[var(--app-border)] px-4 py-3 sm:px-6 sm:py-4">
+          <div className="flex items-center gap-2">
+            <Tag size={18} className="text-brand-500" />
+            <h3 className="font-display text-base font-bold text-[var(--app-text)] sm:text-lg">管理标签</h3>
+            {busy && <Loader2 size={14} className="animate-spin text-[var(--app-muted)]" />}
+          </div>
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-xl p-1.5 text-[var(--app-muted)] transition hover:bg-[var(--app-hover)] hover:text-[var(--app-text)]"
+            title="关闭"
+          >
+            <X size={20} />
+          </button>
+        </div>
+
+        <div className="grid flex-1 grid-cols-1 gap-4 overflow-hidden p-3 sm:p-6 md:grid-cols-[minmax(0,1fr)_minmax(0,1.5fr)]">
+          <section className="flex min-h-0 flex-col gap-3">
+            <h4 className="text-xs font-bold uppercase tracking-widest text-[var(--app-muted)]">标签</h4>
+            <div className="flex items-center gap-1.5">
+              <input
+                value={draftName}
+                onChange={(event) => setDraftName(event.target.value)}
+                onKeyDown={(event) => {
+                  if (event.key === 'Enter') {
+                    event.preventDefault()
+                    void handleCreate()
+                  }
+                }}
+                maxLength={24}
+                placeholder="新建标签名"
+                className="input-base !py-2 text-sm"
+              />
+              <button
+                type="button"
+                onClick={() => void handleCreate()}
+                disabled={busy || !draftName.trim()}
+                className="btn-outline shrink-0 !px-3 !py-2 text-xs"
+                title="创建标签"
+              >
+                <Plus size={14} />
+                新建
+              </button>
+            </div>
+
+            <div className="min-h-0 flex-1 space-y-1.5 overflow-y-auto pr-1">
+              {tags.length === 0 ? (
+                <p className="rounded-xl border border-dashed border-[var(--app-border)] px-3 py-6 text-center text-xs text-[var(--app-muted)]">
+                  还没有标签。先创建一个，再把媒体库归入其中。
+                </p>
+              ) : (
+                tags.map((tag) => {
+                  const drag = dragProps(tag.name)
+                  const isDragOver = dragOverId === tag.name && draggingId !== tag.name
+                  return (
+                    <div
+                      key={tag.name}
+                      onDragOver={drag.onDragOver}
+                      onDragLeave={drag.onDragLeave}
+                      onDrop={drag.onDrop}
+                      className={`flex items-center gap-2 rounded-xl border px-2.5 py-2 transition-colors ${
+                        isDragOver
+                          ? 'border-brand-500/60 bg-brand-500/5'
+                          : 'border-[var(--app-border)] bg-[var(--app-panel-soft)]'
+                      }`}
+                    >
+                      {renaming === tag.name ? (
+                        <>
+                          <input
+                            autoFocus
+                            value={renameDraft}
+                            onChange={(event) => setRenameDraft(event.target.value)}
+                            onKeyDown={(event) => {
+                              if (event.key === 'Enter') {
+                                event.preventDefault()
+                                void handleRename(tag.name)
+                              }
+                              if (event.key === 'Escape') {
+                                setRenaming('')
+                                setRenameDraft('')
+                              }
+                            }}
+                            maxLength={24}
+                            className="min-w-0 flex-1 rounded-lg border border-[var(--app-border)] bg-[var(--app-panel)] px-2 py-1 text-xs font-semibold text-[var(--app-text)] outline-none focus:border-brand-500"
+                          />
+                          <button
+                            type="button"
+                            onClick={() => void handleRename(tag.name)}
+                            className="rounded-lg p-1 text-brand-500 transition-colors hover:bg-[var(--app-hover)]"
+                            title="保存名称"
+                          >
+                            <Check size={14} />
+                          </button>
+                          <button
+                            type="button"
+                            onClick={() => {
+                              setRenaming('')
+                              setRenameDraft('')
+                            }}
+                            className="rounded-lg p-1 text-[var(--app-muted)] transition-colors hover:bg-[var(--app-hover)]"
+                            title="取消"
+                          >
+                            <X size={14} />
+                          </button>
+                        </>
+                      ) : (
+                        <>
+                          <button
+                            type="button"
+                            draggable={drag.draggable}
+                            onDragStart={drag.onDragStart}
+                            onDragEnd={drag.onDragEnd}
+                            className={`-ml-1 shrink-0 cursor-grab rounded-lg p-1 text-[var(--app-muted)] transition-colors hover:bg-[var(--app-hover)] ${
+                              draggingId === tag.name ? 'opacity-40' : ''
+                            }`}
+                            title="拖拽调整标签顺序"
+                            aria-label="拖拽调整标签顺序"
+                          >
+                            <GripVertical size={13} />
+                          </button>
+                          <button
+                            type="button"
+                            onClick={() => setTagFilter(tag.name)}
+                            className="min-w-0 flex-1 truncate text-left text-sm font-bold text-[var(--app-text)] transition-colors hover:text-brand-500"
+                            title={`只看「${tag.name}」标签下的媒体库`}
+                          >
+                            {tag.name}
+                          </button>
+                          <span className="shrink-0 font-mono text-[10px] text-[var(--app-muted)]">
+                            {tag.library_ids.length}
+                          </span>
+                          <button
+                            type="button"
+                            onClick={() => {
+                              setRenaming(tag.name)
+                              setRenameDraft(tag.name)
+                            }}
+                            className="rounded-lg p-1 text-[var(--app-muted)] transition-colors hover:bg-[var(--app-hover)] hover:text-brand-500"
+                            title="重命名"
+                          >
+                            <Pencil size={13} />
+                          </button>
+                          <button
+                            type="button"
+                            onClick={() => void handleRemove(tag)}
+                            className="rounded-lg p-1 text-[var(--app-muted)] transition-colors hover:bg-[var(--app-hover)] hover:text-red-500"
+                            title="删除标签"
+                          >
+                            <Trash2 size={13} />
+                          </button>
+                        </>
+                      )}
+                    </div>
+                  )
+                })
+              )}
+            </div>
+          </section>
+
+          <section className="flex min-h-0 flex-col gap-3 border-t border-[var(--app-border)] pt-4 md:border-l md:border-t-0 md:pl-4 md:pt-0">
+            <div className="flex flex-wrap items-center justify-between gap-2">
+              <h4 className="text-xs font-bold uppercase tracking-widest text-[var(--app-muted)]">
+                媒体库归类（{libraries.length}）
+              </h4>
+              <span className="text-xs text-[var(--app-muted)]">勾选多个后可一次性设置标签</span>
+            </div>
+
+            <div className="flex flex-wrap items-center gap-1.5">
+              <input
+                value={keyword}
+                onChange={(event) => setKeyword(event.target.value)}
+                placeholder="搜索名称 / 路径 / 类型"
+                className="input-base h-9 min-w-[10rem] flex-1 !py-0 text-xs"
+              />
+              <select
+                value={tagFilter}
+                onChange={(event) => setTagFilter(event.target.value)}
+                className="input-base h-9 w-32 shrink-0 !py-0 text-xs"
+                title="筛选媒体库"
+              >
+                <option value="">全部标签</option>
+                <option value={UNTAGGED}>未分类</option>
+                {tags.map((tag) => (
+                  <option key={tag.name} value={tag.name}>
+                    {tag.name}
+                  </option>
+                ))}
+              </select>
+            </div>
+
+            <div className="flex flex-wrap items-center gap-2 rounded-xl border border-[var(--app-border)] bg-[var(--app-panel-soft)] px-2.5 py-2">
+              <button
+                type="button"
+                onClick={toggleVisible}
+                disabled={visibleLibraries.length === 0}
+                className="inline-flex items-center gap-1.5 rounded-lg border border-[var(--app-border)] bg-[var(--app-panel)] px-2.5 py-1 text-xs font-bold text-[var(--app-subtle)] transition-colors hover:border-brand-500/40 hover:text-brand-500 disabled:opacity-40"
+                title="全选 / 取消全选当前列表中的媒体库"
+              >
+                <Check size={13} />
+                {allVisibleSelected ? '取消全选' : '全选'}
+              </button>
+              <span className="text-xs font-semibold text-[var(--app-subtle)]">
+                已选 {selectedIds.length} 个
+              </span>
+              <select
+                value={batchTag}
+                onChange={(event) => setBatchTag(event.target.value)}
+                className="input-base ml-auto h-8 w-36 shrink-0 !py-0 text-xs"
+                title="选择要批量设置的标签"
+              >
+                <option value="">未分类（移出标签）</option>
+                {tags.map((tag) => (
+                  <option key={tag.name} value={tag.name}>
+                    {tag.name}
+                  </option>
+                ))}
+              </select>
+              <button
+                type="button"
+                onClick={() => void handleApplyBatch()}
+                disabled={busy || selectedIds.length === 0}
+                className="btn-outline shrink-0 !px-3 !py-1.5 text-xs"
+                title="把选中媒体库的标签一次性设为左侧所选值"
+              >
+                {applying && <Loader2 size={13} className="animate-spin" />}
+                应用到已选
+              </button>
+              {selectedIds.length > 0 && (
+                <button
+                  type="button"
+                  onClick={() => setSelectedIds([])}
+                  disabled={applying}
+                  className="rounded-lg p-1 text-[var(--app-muted)] transition-colors hover:bg-[var(--app-hover)]"
+                  title="清空选择"
+                >
+                  <X size={13} />
+                </button>
+              )}
+            </div>
+
+            <div className="min-h-0 flex-1 space-y-1.5 overflow-y-auto pr-1">
+              {visibleLibraries.length === 0 ? (
+                <p className="rounded-xl border border-dashed border-[var(--app-border)] px-3 py-6 text-center text-xs text-[var(--app-muted)]">
+                  {libraries.length === 0 ? '暂无可归类的媒体库。' : '没有符合当前筛选条件的媒体库。'}
+                </p>
+              ) : (
+                visibleLibraries.map((library) => {
+                  const current = tagByLibrary.get(library.id) ?? ''
+                  const checked = selectedSet.has(library.id)
+                  return (
+                    <div
+                      key={library.id}
+                      className={`flex items-center gap-2 rounded-xl border px-2.5 py-2 transition-colors ${
+                        checked
+                          ? 'border-brand-500/50 bg-brand-500/5'
+                          : 'border-[var(--app-border)] bg-[var(--app-panel-soft)]'
+                      }`}
+                    >
+                      <input
+                        type="checkbox"
+                        checked={checked}
+                        onChange={() => toggleLibrary(library.id)}
+                        disabled={applying}
+                        className="h-4 w-4 shrink-0 accent-brand-400"
+                        title="勾选后可批量设置标签"
+                      />
+                      <span
+                        className="min-w-0 flex-1 truncate text-xs font-semibold text-[var(--app-text)]"
+                        title={library.path || library.name}
+                      >
+                        {library.name}
+                      </span>
+                      {busyLibrary === library.id && (
+                        <Loader2 size={13} className="shrink-0 animate-spin text-[var(--app-muted)]" />
+                      )}
+                      <select
+                        value={current}
+                        disabled={busy || busyLibrary === library.id}
+                        onChange={(event) => void handleAssign(library, event.target.value)}
+                        className="input-base h-8 w-32 shrink-0 !py-0 text-xs"
+                        title="选择该媒体库所属标签"
+                      >
+                        <option value="">未分类</option>
+                        {tags.map((tag) => (
+                          <option key={tag.name} value={tag.name}>
+                            {tag.name}
+                          </option>
+                        ))}
+                      </select>
+                    </div>
+                  )
+                })
+              )}
+            </div>
+          </section>
+        </div>
+
+        <div className="flex items-center justify-between gap-3 border-t border-[var(--app-border)] px-4 py-3 sm:px-6">
+          <span className="text-xs text-[var(--app-muted)]">标签按用户保存；一个媒体库同时只属于一个标签。</span>
+          <button type="button" onClick={onClose} className="btn-outline !px-4 !py-2 text-sm">
+            完成
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}

web/src/components/MediaCard.tsx

@@ -4,6 +4,9 @@ import { Film, Play, Layers, Star } from 'lucide-react'
 import { imageURL } from '../api/client'
 import type { Media } from '../types'
 
+const ACTION_OVERLAY_CLASS =
+  'absolute right-2 top-2 z-20 flex flex-wrap justify-end gap-1 opacity-100 transition-opacity sm:pointer-events-none sm:opacity-0 sm:group-hover:pointer-events-auto sm:group-hover:opacity-100 sm:focus-within:pointer-events-auto sm:focus-within:opacity-100'
+
 // memo：父级状态变化（如轮播切图、其它卡片操作）不再级联重渲染所有卡片。
 // 注意 actions/renderActions 必须引用稳定（用 renderActions 传函数）memo 才生效。
 export const MediaCard = memo(function MediaCard({
@@ -79,25 +82,18 @@ export const MediaCard = memo(function MediaCard({
             </div>
           )}
 
-          {/* Episode count badge */}
-          {count !== undefined && count > 1 && (
-            <span className="absolute right-3 top-3 inline-flex items-center gap-1 rounded-xl border border-white/15 bg-[#111827]/90 px-2 py-1 text-[10px] font-bold text-white shadow-sm">
-              <Layers size={10} className="text-[#c9954a]" />
-              <span>{count} 集</span>
+          {/* Episode count badge：统一放右下角（桌面端与移动端一致），与左上角评分彻底错开 */}
+          {(count !== undefined && count > 1) || (count === undefined && versionCount > 1) ? (
+            <span className="absolute bottom-2 right-2 inline-flex items-center gap-1 rounded-lg border border-white/15 bg-[#111827]/90 px-1.5 py-0.5 text-[10px] font-bold text-white shadow-sm">
+              <Layers size={10} className="shrink-0 text-[#c9954a]" />
+              <span>{count !== undefined && count > 1 ? `${count} 集` : `${versionCount} 版本`}</span>
             </span>
-          )}
-
-          {count === undefined && versionCount > 1 && (
-            <span className="absolute right-3 top-3 inline-flex items-center gap-1 rounded-xl border border-white/15 bg-[#111827]/90 px-2 py-1 text-[10px] font-bold text-white shadow-sm">
-              <Layers size={10} className="text-[#c9954a]" />
-              <span>{versionCount} 版本</span>
-            </span>
-          )}
+          ) : null}
 
           {/* Rating Badge */}
           {displayRating > 0 && (
-            <span className="absolute left-3 top-3 inline-flex items-center gap-0.5 rounded-xl border border-white/15 bg-[#111827]/90 px-2 py-1 text-[10px] font-bold text-[#c9954a] shadow-sm">
-              <Star size={10} fill="currentColor" />
+            <span className="absolute left-2 top-2 inline-flex items-center gap-0.5 rounded-lg border border-white/15 bg-[#111827]/90 px-1.5 py-0.5 text-[10px] font-bold text-[#c9954a] shadow-sm">
+              <Star size={10} fill="currentColor" className="shrink-0" />
               <span>{displayRating.toFixed(1)}</span>
             </span>
           )}
@@ -160,7 +156,7 @@ export const MediaCard = memo(function MediaCard({
           {card}
         </button>
         {actionContent && (
-          <div className="absolute right-2 top-2 z-20 flex flex-wrap justify-end gap-1 opacity-0 transition-opacity group-hover:opacity-100 focus-within:opacity-100">
+          <div className={ACTION_OVERLAY_CLASS}>
             {actionContent}
           </div>
         )}
@@ -174,7 +170,7 @@ export const MediaCard = memo(function MediaCard({
         <Link to={href} className="block">
           {card}
         </Link>
-        <div className="absolute right-2 top-2 z-20 flex flex-wrap justify-end gap-1 opacity-0 transition-opacity group-hover:opacity-100 focus-within:opacity-100">
+        <div className={ACTION_OVERLAY_CLASS}>
           {actionContent}
         </div>
       </div>

web/src/hooks/useDragReorder.ts

@@ -0,0 +1,86 @@
+import { useCallback, useState, type DragEvent } from 'react'
+
+/** 一组可直接展开到可拖拽元素上的事件处理器。 */
+export type DragReorderHandlers = {
+  draggable: boolean
+  onDragStart: (event: DragEvent) => void
+  onDragOver: (event: DragEvent) => void
+  onDragLeave: (event: DragEvent) => void
+  onDrop: (event: DragEvent) => void
+  onDragEnd: () => void
+}
+
+/**
+ * 把 `fromId` 移动到 `toId` 当前所在的位置，返回新数组；不改动入参。
+ * 任一 id 不存在，或两者相同时返回 null，表示无需重排。
+ */
+export function moveIdToPosition(ids: string[], fromId: string, toId: string): string[] | null {
+  const fromIndex = ids.indexOf(fromId)
+  const toIndex = ids.indexOf(toId)
+  if (fromIndex < 0 || toIndex < 0 || fromIndex === toIndex) return null
+  const next = [...ids]
+  const [moved] = next.splice(fromIndex, 1)
+  next.splice(toIndex, 0, moved)
+  return next
+}
+
+/**
+ * 列表拖拽排序的通用状态机：只负责「一串稳定 id」的拖拽与重排计算，
+ * 不关心渲染。调用方把 `dragProps(id)` 展开到拖拽柄上，并用返回的
+ * `draggingId` / `dragOverId` 决定高亮样式。
+ *
+ * 落点语义：把被拖项插入到目标项所在的位置。未传 `onReorder` 时整体禁用。
+ */
+export function useDragReorder(
+  ids: string[],
+  onReorder?: (orderedIds: string[]) => void | Promise<void>,
+): {
+  draggingId: string | null
+  dragOverId: string | null
+  dragProps: (id: string) => DragReorderHandlers
+} {
+  const [draggingId, setDraggingId] = useState<string | null>(null)
+  const [dragOverId, setDragOverId] = useState<string | null>(null)
+
+  const enabled = Boolean(onReorder)
+
+  const dragProps = useCallback(
+    (id: string): DragReorderHandlers => ({
+      draggable: enabled,
+      onDragStart: (event) => {
+        if (!enabled) return
+        event.dataTransfer.effectAllowed = 'move'
+        event.dataTransfer.setData('text/plain', id)
+        setDraggingId(id)
+        setDragOverId(null)
+      },
+      onDragOver: (event) => {
+        if (!enabled || draggingId === id) return
+        event.preventDefault()
+        event.dataTransfer.dropEffect = 'move'
+        setDragOverId((prev) => (prev === id ? prev : id))
+      },
+      onDragLeave: () => {
+        setDragOverId((prev) => (prev === id ? null : prev))
+      },
+      onDrop: (event) => {
+        if (!enabled) return
+        event.preventDefault()
+        // 拖拽期间 state 可能尚未提交，优先信任 dataTransfer 里的来源 id。
+        const fromId = draggingId ?? event.dataTransfer.getData('text/plain')
+        setDraggingId(null)
+        setDragOverId(null)
+        if (!fromId || fromId === id) return
+        const next = moveIdToPosition(ids, fromId, id)
+        if (next) void onReorder?.(next)
+      },
+      onDragEnd: () => {
+        setDraggingId(null)
+        setDragOverId(null)
+      },
+    }),
+    [enabled, draggingId, ids, onReorder],
+  )
+
+  return { draggingId, dragOverId, dragProps }
+}

web/src/hooks/useEpisodeArtworkPreference.ts

@@ -2,6 +2,7 @@ import { useCallback, useEffect, useRef, useState, type Dispatch, type SetStateA
 import toast from 'react-hot-toast'
 
 import { adminAPI } from '../api/admin'
+import { useAuthStore } from '../stores/auth'
 
 const SETTING_KEY = 'scrape.episode_images'
 
@@ -13,8 +14,11 @@ export function useEpisodeArtworkPreference(): [boolean, Dispatch<SetStateAction
   const enabledRef = useRef(false)
   const changedLocally = useRef(false)
   const saveQueue = useRef(Promise.resolve())
+  const isAdmin = useAuthStore((state) => state.user?.role === 'admin')
 
   useEffect(() => {
+    if (!isAdmin) return
+
     let active = true
     adminAPI.listSettings()
       .then((settings) => {
@@ -32,9 +36,11 @@ export function useEpisodeArtworkPreference(): [boolean, Dispatch<SetStateAction
     return () => {
       active = false
     }
-  }, [])
+  }, [isAdmin])
 
   const setEnabled = useCallback((nextValue: SetStateAction<boolean>) => {
+    if (!isAdmin) return
+
     const next = typeof nextValue === 'function' ? nextValue(enabledRef.current) : nextValue
     if (enabledRef.current === next) return
     changedLocally.current = true
@@ -47,7 +53,7 @@ export function useEpisodeArtworkPreference(): [boolean, Dispatch<SetStateAction
       .catch(() => {
         toast.error('保存每集图片设置失败')
       })
-  }, [])
+  }, [isAdmin])
 
   return [enabled, setEnabled]
 }

web/src/hooks/useLibraryListSort.ts

@@ -0,0 +1,38 @@
+import { useCallback, useEffect, useState } from 'react'
+
+import {
+  readLibraryListSort,
+  writeLibraryListSort,
+  type LibraryListSortField,
+  type LibraryListSortOrder,
+} from '../utils/libraryListSort'
+
+export type UseLibraryListSortResult = {
+  field: LibraryListSortField
+  order: LibraryListSortOrder
+  setSort: (field: LibraryListSortField, order: LibraryListSortOrder) => void
+}
+
+/**
+ * 媒体库列表的排序偏好（localStorage 持久化）。
+ *
+ * 首页和 /libraries 读的是同一份偏好，这样在 /libraries 改了排序后回到首页
+ * 顺序也一致；默认「库名倒序」。另外监听 storage 事件，多标签页同时打开时
+ * 一边改动另一边也能跟上。
+ */
+export function useLibraryListSort(): UseLibraryListSortResult {
+  const [sort, setSort] = useState(() => readLibraryListSort())
+
+  useEffect(() => {
+    const sync = () => setSort(readLibraryListSort())
+    window.addEventListener('storage', sync)
+    return () => window.removeEventListener('storage', sync)
+  }, [])
+
+  const update = useCallback((field: LibraryListSortField, order: LibraryListSortOrder) => {
+    writeLibraryListSort(field, order)
+    setSort({ field, order })
+  }, [])
+
+  return { field: sort.field, order: sort.order, setSort: update }
+}

web/src/hooks/useLibraryTags.ts

@@ -0,0 +1,267 @@
+import { useCallback, useEffect, useRef, useState } from 'react'
+import toast from 'react-hot-toast'
+
+import {
+  ALL_TAG_ID,
+  assignLibrariesToTag,
+  attachLibraryToTag,
+  dedupeLibraryTags,
+  loadLibraryTags,
+  normalizeLibraryTags,
+  normalizeTagName,
+  readCachedLibraryTags,
+  readSelectedTagId,
+  reorderLibraryTags,
+  resolveSelectedTagId,
+  saveLibraryTags,
+  writeCachedLibraryTags,
+  writeSelectedTagId,
+  type LibraryTag,
+} from '../utils/libraryTags'
+
+export type UseLibraryTagsResult = {
+  /** 当前用户维护的标签（顺序即标签栏顺序）。 */
+  tags: LibraryTag[]
+  /** 标签数据是否仍在首次加载中。 */
+  loading: boolean
+  /** 是否有写入在途（可用于禁用重复点击）。 */
+  saving: boolean
+  /** 接口不可用（例如旧后端）时降级为本地标签。 */
+  loadError: boolean
+  /** 当前选中的标签栏：ALL_TAG_ID 表示「全部」。 */
+  selectedTagId: string
+  setSelectedTagId: (tagId: string) => void
+  createTag: (name: string) => Promise<string>
+  renameTag: (from: string, to: string) => Promise<void>
+  /** 按给定标签名顺序重排标签栏（拖拽排序的落点）。 */
+  reorderTags: (orderedNames: string[]) => Promise<void>
+  removeTag: (name: string) => Promise<void>
+  /** 覆盖某个标签下的媒体库集合（保持传入顺序）。 */
+  setTagLibraries: (name: string, libraryIds: string[]) => Promise<void>
+  /** 把媒体库挂到标签下；tagName 为空表示移出所有标签。 */
+  assignLibrary: (libraryId: string, tagName: string) => Promise<void>
+  /** 批量把媒体库挂到标签下；tagName 为空表示批量移出所有标签。一次写入。 */
+  assignLibraries: (libraryIds: string[], tagName: string) => Promise<void>
+}
+
+/**
+ * 媒体库标签的用户级读写。
+ *
+ * 写入采用「先乐观更新、串行提交、失败回滚」：标签是整份替换（`PUT`），
+ * 并发请求可能让旧快照最后落库，因此所有写操作串行排队，每次发送的都是
+ * 排队时的最新本地状态。接口不可用（旧后端/网络异常）时退回本地存储，
+ * 标签栏依旧可用，不会因为一次失败就让标签凭空消失。
+ */
+export function useLibraryTags(): UseLibraryTagsResult {
+  const [tags, setTags] = useState<LibraryTag[]>([])
+  const [loading, setLoading] = useState(true)
+  const [saving, setSaving] = useState(false)
+  const [loadError, setLoadError] = useState(false)
+  const [selectedTagId, setSelectedTagIdState] = useState(() => readSelectedTagId())
+
+  const tagsRef = useRef<LibraryTag[]>([])
+  const selectedRef = useRef(selectedTagId)
+  const savedRef = useRef<LibraryTag[]>([])
+  const chainRef = useRef<Promise<unknown>>(Promise.resolve())
+  const pendingRef = useRef(0)
+  // 后端没有该接口（旧版本）时退化为仅本地存储，不再反复提示保存失败。
+  const localOnlyRef = useRef(false)
+
+  useEffect(() => {
+    tagsRef.current = tags
+  }, [tags])
+
+  useEffect(() => {
+    selectedRef.current = selectedTagId
+  }, [selectedTagId])
+
+  useEffect(() => {
+    let cancelled = false
+    setLoading(true)
+    loadLibraryTags()
+      .then((rows) => {
+        if (cancelled) return
+        tagsRef.current = rows
+        savedRef.current = rows
+        setTags(rows)
+        setLoadError(false)
+      })
+      .catch((err) => {
+        if (cancelled) return
+        // 旧后端没有 /me/library-tags：用本地缓存兜底，标签栏照常可用。
+        const cached = readCachedLibraryTags()
+        tagsRef.current = cached
+        savedRef.current = cached
+        setTags(cached)
+        setLoadError(true)
+        // 接口不存在时（旧后端）只做本地读写，避免每次编辑都弹一次保存失败。
+        localOnlyRef.current = isMissingEndpoint(err)
+      })
+      .finally(() => {
+        if (!cancelled) setLoading(false)
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  // 选中的标签可能被删除，落回「全部」以免标签栏空白。
+  // 注意：标签首次加载完成前 tags 为空集合，此时不能据此判定标签已被删除，
+  // 否则从子页面返回时，持久化的选中标签会被误重置为「全部」。
+  useEffect(() => {
+    if (loading) return
+    const resolved = resolveSelectedTagId(tags, selectedTagId)
+    if (resolved !== selectedTagId) {
+      selectedRef.current = resolved
+      setSelectedTagIdState(resolved)
+    }
+  }, [loading, tags, selectedTagId])
+
+  const setSelectedTagId = useCallback((tagId: string) => {
+    const next = tagId && tagId !== ALL_TAG_ID ? tagId : ALL_TAG_ID
+    selectedRef.current = next
+    writeSelectedTagId(next)
+    setSelectedTagIdState(next)
+  }, [])
+
+  const mutate = useCallback((updater: (current: LibraryTag[]) => LibraryTag[]) => {
+    const rollback = savedRef.current
+    const next = dedupeLibraryTags(normalizeLibraryTags(updater(tagsRef.current)))
+    tagsRef.current = next
+    setTags(next)
+
+    pendingRef.current += 1
+    setSaving(true)
+    const task = chainRef.current.then(async () => {
+      // 发送排队时的最新本地状态：链上更早的写入已经被后面的状态取代。
+      const snapshot = tagsRef.current
+      if (localOnlyRef.current) {
+        // 已知后端不支持标签接口：只落本地缓存，不再发请求。
+        if (tagsRef.current === snapshot) savedRef.current = snapshot
+        writeCachedLibraryTags(snapshot)
+        return
+      }
+      try {
+        const saved = await saveLibraryTags(snapshot)
+        savedRef.current = saved
+        setLoadError(false)
+        if (tagsRef.current === snapshot) {
+          tagsRef.current = saved
+          setTags(saved)
+        }
+      } catch (err) {
+        if (isMissingEndpoint(err)) {
+          // 旧后端不支持标签接口：本次修改保留在本地存储，标签栏照常可用。
+          localOnlyRef.current = true
+          savedRef.current = snapshot
+          writeCachedLibraryTags(snapshot)
+          setLoadError(true)
+          return
+        }
+        // 用最后一次成功保存的状态回滚，避免前端显示一份服务端并不存在的标签。
+        tagsRef.current = rollback
+        savedRef.current = rollback
+        setTags(rollback)
+        setLoadError(true)
+        toast.error('标签保存失败，请稍后重试')
+      }
+    })
+    chainRef.current = task.catch(() => undefined)
+    return task.finally(() => {
+      pendingRef.current = Math.max(0, pendingRef.current - 1)
+      if (pendingRef.current === 0) setSaving(false)
+    })
+  }, [])
+
+  const createTag = useCallback(
+    async (name: string) => {
+      const trimmed = normalizeTagName(name)
+      if (!trimmed) return ''
+      if (tagsRef.current.some((tag) => tag.name.toLowerCase() === trimmed.toLowerCase())) {
+        return trimmed
+      }
+      await mutate((current) => [...current, { name: trimmed, library_ids: [] }])
+      return tagsRef.current.some((tag) => tag.name === trimmed) ? trimmed : ''
+    },
+    [mutate],
+  )
+
+  const renameTag = useCallback(
+    async (from: string, to: string) => {
+      const trimmed = normalizeTagName(to)
+      if (!trimmed || trimmed === from) return
+      await mutate((current) =>
+        current.map((tag) => (tag.name === from ? { ...tag, name: trimmed } : tag)),
+      )
+      // 重命名后选中项要跟着换到新名字，否则标签栏会落回「全部」。
+      if (selectedRef.current === from) setSelectedTagId(trimmed)
+    },
+    [mutate, setSelectedTagId],
+  )
+
+  const reorderTags = useCallback(
+    async (orderedNames: string[]) => {
+      await mutate((current) => reorderLibraryTags(current, orderedNames))
+    },
+    [mutate],
+  )
+
+  const removeTag = useCallback(
+    async (name: string) => {
+      await mutate((current) => current.filter((tag) => tag.name !== name))
+      if (selectedRef.current === name) setSelectedTagId(ALL_TAG_ID)
+    },
+    [mutate, setSelectedTagId],
+  )
+
+  const setTagLibraries = useCallback(
+    async (name: string, libraryIds: string[]) => {
+      await mutate((current) =>
+        current.map((tag) => (tag.name === name ? { ...tag, library_ids: libraryIds } : tag)),
+      )
+    },
+    [mutate],
+  )
+
+  const assignLibrary = useCallback(
+    async (libraryId: string, tagName: string) => {
+      await mutate((current) => {
+        if (tagName) return attachLibraryToTag(current, libraryId, tagName)
+        return current.map((tag) => ({
+          ...tag,
+          library_ids: tag.library_ids.filter((id) => id !== libraryId),
+        }))
+      })
+    },
+    [mutate],
+  )
+
+  const assignLibraries = useCallback(
+    async (libraryIds: string[], tagName: string) => {
+      await mutate((current) => assignLibrariesToTag(current, libraryIds, tagName))
+    },
+    [mutate],
+  )
+
+  return {
+    tags,
+    loading,
+    saving,
+    loadError,
+    selectedTagId,
+    setSelectedTagId,
+    createTag,
+    renameTag,
+    reorderTags,
+    removeTag,
+    setTagLibraries,
+    assignLibrary,
+    assignLibraries,
+  }
+}
+
+/** 判断错误是否说明后端没有这个接口（旧版本 / 反向代理未更新）。 */
+function isMissingEndpoint(err: unknown): boolean {
+  const status = (err as { response?: { status?: number } })?.response?.status
+  return status === 404 || status === 405 || status === 501
+}

web/src/hooks/useListPositionMemory.test.ts

@@ -0,0 +1,62 @@
+import { createElement } from 'react'
+import { renderToStaticMarkup } from 'react-dom/server'
+
+import {
+  forgetListPosition,
+  normalizeListPosition,
+  readListPosition,
+  useRememberedListPosition,
+  writeListPosition,
+} from './useListPositionMemory.ts'
+
+function check(name: string, condition: boolean) {
+  if (!condition) throw new Error(`useListPositionMemory: ${name}`)
+}
+
+check('unknown key falls back', readListPosition('unknown-key', 3) === 3)
+check('missing value uses default fallback', readListPosition('unknown-key') === 1)
+
+writeListPosition('demo', 4)
+check('round trip keeps value', readListPosition('demo') === 4)
+
+writeListPosition('demo', 9)
+check('rewrite keeps latest value', readListPosition('demo') === 9)
+
+forgetListPosition('demo')
+check('forget resets to fallback', readListPosition('demo', 2) === 2)
+
+check('normalize parses numeric string', normalizeListPosition('7', 1) === 7)
+check('normalize floors decimals', normalizeListPosition(3.8, 1) === 3)
+check('normalize rejects zero', normalizeListPosition(0, 2) === 2)
+check('normalize rejects negatives', normalizeListPosition(-5, 2) === 2)
+check('normalize rejects NaN input', normalizeListPosition('abc', 2) === 2)
+check('normalize rejects infinity', normalizeListPosition(Number.POSITIVE_INFINITY, 2) === 2)
+check('normalize clamps to max', normalizeListPosition(99, 1, 8) === 8)
+check('normalize keeps value under max', normalizeListPosition(6, 1, 8) === 6)
+
+// 详情页返回时列表组件会重新挂载：挂载即可读到上次页码，而不是先回第一页。
+function PageProbe({ positionKey, max }: { positionKey: string; max?: number }) {
+  const [position] = useRememberedListPosition(positionKey, 1, max)
+  return createElement('span', null, String(position))
+}
+
+writeListPosition('grid:/libraries', 3)
+check(
+  'remount restores remembered page',
+  renderToStaticMarkup(createElement(PageProbe, { positionKey: 'grid:/libraries' })) === '<span>3</span>',
+)
+check(
+  'remount restores independent key',
+  renderToStaticMarkup(createElement(PageProbe, { positionKey: 'grid:/' })) === '<span>1</span>',
+)
+writeListPosition('shelves', 40)
+check(
+  'remount clamps to restore cap',
+  renderToStaticMarkup(createElement(PageProbe, { positionKey: 'shelves', max: 15 })) === '<span>15</span>',
+)
+check(
+  'live state can grow past restore cap',
+  readListPosition('shelves') === 40,
+)
+
+console.log('useListPositionMemory.test.ts ok')

web/src/hooks/useListPositionMemory.ts

@@ -0,0 +1,87 @@
+import { useCallback, useEffect, useState } from 'react'
+
+// 列表分页位置（媒体库入口当前页、媒体库已加载页数、货架解锁数量）需要在
+// 进入详情页再返回后依然生效，所以用 sessionStorage 记录，并在内存里留一份
+// 兜底缓存；同一标签页内刷新也仍然记得。
+const LIST_POSITION_PREFIX = 'mebox.listpos.'
+const positions = new Map<string, number>()
+
+/**
+ * 详情页返回时最多自动补拉的分页数量：滚动到很深的用户重新进入列表时
+ * 依次补拉这些页，剩下的继续由底部哨兵按需加载，避免一次打太多请求。
+ */
+export const MAX_RESTORE_PAGES = 8
+
+/** 把存储里的任意值收敛成 >= 1 的整数分页位置。 */
+export function normalizeListPosition(
+  value: unknown,
+  fallback = 1,
+  max = Number.MAX_SAFE_INTEGER,
+): number {
+  const numeric = typeof value === 'number' ? value : Number(value)
+  if (!Number.isFinite(numeric)) return fallback
+  const rounded = Math.floor(numeric)
+  if (rounded < 1) return fallback
+  return Math.min(rounded, max)
+}
+
+export function readListPosition(key: string, fallback = 1, max = Number.MAX_SAFE_INTEGER): number {
+  const cached = positions.get(key)
+  if (cached !== undefined) return Math.min(cached, max)
+  if (typeof window === 'undefined') return fallback
+  try {
+    const raw = window.sessionStorage.getItem(LIST_POSITION_PREFIX + key)
+    if (raw === null) return fallback
+    const value = normalizeListPosition(raw, fallback, max)
+    positions.set(key, value)
+    return value
+  } catch {
+    return fallback
+  }
+}
+
+export function writeListPosition(key: string, value: number): void {
+  const next = normalizeListPosition(value)
+  positions.set(key, next)
+  if (typeof window === 'undefined') return
+  try {
+    window.sessionStorage.setItem(LIST_POSITION_PREFIX + key, String(next))
+  } catch {
+    // 私密模式等场景忽略存储失败，不影响分页。
+  }
+}
+
+export function forgetListPosition(key: string): void {
+  positions.delete(key)
+  if (typeof window === 'undefined') return
+  try {
+    window.sessionStorage.removeItem(LIST_POSITION_PREFIX + key)
+  } catch {
+    // 同上，存储不可用时无需处理。
+  }
+}
+
+/**
+ * 记住列表当前分页位置。key 需要在一份挂载生命周期内保持稳定：路由切换会
+ * 让列表重新挂载，因此每次挂载都能直接读到上次记录的位置（不会先闪回第一页）。
+ */
+export function useRememberedListPosition(
+  key: string,
+  fallback = 1,
+  max = Number.MAX_SAFE_INTEGER,
+): [number, (next: number | ((prev: number) => number)) => void] {
+  const [position, setPosition] = useState(() => readListPosition(key, fallback, max))
+
+  useEffect(() => {
+    writeListPosition(key, position)
+  }, [key, position])
+
+  const remember = useCallback((next: number | ((prev: number) => number)) => {
+    setPosition((prev) => {
+      const value = typeof next === 'function' ? next(prev) : next
+      return normalizeListPosition(value, prev)
+    })
+  }, [])
+
+  return [position, remember]
+}

web/src/pages/HomePage.tsx

@@ -6,8 +6,13 @@ import type { HistoryItem } from '../api/playback'
 import type { Library, Media } from '../types'
 import type { SeriesCard } from '../utils/groupSeries'
 import { fetchLibraries, peekLibraries } from '../utils/libraryCache'
+import { buildLibraryTagTabs, filterLibrariesByTag } from '../utils/libraryTags'
+import { LibraryTagBar } from '../components/LibraryTagBar'
+import { ManageLibraryTagsDialogView } from '../components/ManageLibraryTagsDialogView'
+import { useLibraryTags } from '../hooks/useLibraryTags'
 import { usePinnedLibraries } from '../hooks/usePinnedLibraries'
-import { sortByPinnedIds } from '../utils/pinnedLibraries'
+import { useLibraryListSort } from '../hooks/useLibraryListSort'
+import { sortLibrariesByField } from '../utils/libraryListSort'
 import { partitionPreviewIDs } from '../utils/remoteEmby'
 import {
   ContinueWatchingSection,
@@ -30,6 +35,8 @@ export function HomePage() {
   const [librariesLoading, setLibrariesLoading] = useState(true)
   const [historyLoading, setHistoryLoading] = useState(true)
   const { pinnedIds } = usePinnedLibraries()
+  const { field: sortField, order: sortOrder } = useLibraryListSort()
+  const libraryTags = useLibraryTags()
 
   // 1. 媒体库元数据极速加载（不带 preview，毫秒级秒开首屏）。
   //    会话内已有缓存则先用缓存立即渲染，后台仍刷新一次兜底。
@@ -85,7 +92,25 @@ export function HomePage() {
     }
   }, [])
 
-  const sortedLibraries = useMemo(() => sortByPinnedIds(libraries, pinnedIds), [libraries, pinnedIds])
+  // 与 /libraries 共用同一份排序偏好（默认库名倒序）：置顶库始终在前，
+  // 组内按偏好排序字段排。这样在媒体库页改过排序后，首页顺序也一致。
+  const sortedLibraries = useMemo(
+    () => sortLibrariesByField(libraries, pinnedIds, sortField, sortOrder),
+    [libraries, pinnedIds, sortField, sortOrder],
+  )
+
+  // 标签过滤只作用于展示层：选中的标签栏决定哪部分媒体库参与轮播/入口网格/内容行。
+  const effectiveTagId = libraryTags.selectedTagId
+  const tagTabs = useMemo(
+    () => buildLibraryTagTabs(sortedLibraries, libraryTags.tags),
+    [sortedLibraries, libraryTags.tags],
+  )
+  const taggedLibraries = useMemo(
+    () => filterLibrariesByTag(sortedLibraries, libraryTags.tags, effectiveTagId),
+    [sortedLibraries, libraryTags.tags, effectiveTagId],
+  )
+
+  const [libraryTagsOpen, setLibraryTagsOpen] = useState(false)
 
   // 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。
@@ -153,14 +178,14 @@ export function HomePage() {
 
   // 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自行按批加载。
   useEffect(() => {
-    if (sortedLibraries.length === 0) return
-    const carouselLibIds = sortedLibraries
+    if (taggedLibraries.length === 0) return
+    const carouselLibIds = taggedLibraries
       .filter((l) => l.carousel_enabled === true)
       .map((l) => l.id)
-    const topRowLibIds = sortedLibraries.slice(0, 3).map((l) => l.id)
+    const topRowLibIds = taggedLibraries.slice(0, 3).map((l) => l.id)
     const shelfTargets = Array.from(new Set([...carouselLibIds, ...topRowLibIds]))
     void fetchPreviews(shelfTargets, 10)
-  }, [sortedLibraries, fetchPreviews])
+  }, [taggedLibraries, 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
   const INITIAL_ROWS = 3
@@ -171,26 +196,26 @@ export function HomePage() {
 
   const revealMoreLibraries = useCallback(() => {
     setVisibleTargetCount((prev) => {
-      if (prev >= sortedLibraries.length) return prev
-      return Math.min(prev + STEP_ROWS, sortedLibraries.length)
+      if (prev >= taggedLibraries.length) return prev
+      return Math.min(prev + STEP_ROWS, taggedLibraries.length)
     })
-  }, [sortedLibraries.length])
+  }, [taggedLibraries.length])
 
   // 随 visibleTargetCount 增加，按需触发后续库的预览加载
   useEffect(() => {
-    if (sortedLibraries.length === 0) return
-    const currentTargets = sortedLibraries.slice(0, visibleTargetCount).map((l) => l.id)
+    if (taggedLibraries.length === 0) return
+    const currentTargets = taggedLibraries.slice(0, visibleTargetCount).map((l) => l.id)
     void fetchPreviews(currentTargets, 10)
-  }, [sortedLibraries, visibleTargetCount, fetchPreviews])
+  }, [taggedLibraries, visibleTargetCount, fetchPreviews])
 
   // 当前已拉取并确认有内容的媒体库行
   const visibleLibraries = useMemo(() => {
-    return sortedLibraries
+    return taggedLibraries
       .slice(0, visibleTargetCount)
       .filter((lib) => (libraryData[lib.id]?.cards?.length ?? 0) > 0)
-  }, [sortedLibraries, visibleTargetCount, libraryData])
+  }, [taggedLibraries, visibleTargetCount, libraryData])
 
-  const hasMoreLibraries = visibleTargetCount < sortedLibraries.length
+  const hasMoreLibraries = visibleTargetCount < taggedLibraries.length
 
   // 底部哨兵监听与滚动双保险（触底解锁后续媒体库行）
   useEffect(() => {
@@ -258,7 +283,7 @@ export function HomePage() {
   // series-type libs (loaded via /series), so gate on cards instead.
   const carouselItems = useMemo(() => {
     const candidateMedia: Media[] = []
-    const effectiveSelectedIds = libraries
+    const effectiveSelectedIds = taggedLibraries
       .filter((l) => l.carousel_enabled === true)
       .map((l) => l.id)
 
@@ -275,7 +300,7 @@ export function HomePage() {
 
     // Fallback to all loaded items with artwork
     if (candidateMedia.length === 0) {
-      for (const lib of libraries) {
+      for (const lib of taggedLibraries) {
         const data = libraryData[lib.id]
         if (data) {
           for (const card of data.cards) {
@@ -286,14 +311,13 @@ export function HomePage() {
     }
 
     return candidateMedia.slice(0, 10)
-  }, [libraries, libraryData])
+  }, [taggedLibraries, libraryData])
 
   // 库列表还没回来先展示整页 loading；库为空时再等一下播放记录，
   // 以免在"空站点"和"有观看记录"两个终态之间闪空白。
   if (librariesLoading || (libraries.length === 0 && historyLoading)) {
     return <HomeLoadingState />
   }
-
   const empty =
     libraries.length === 0 &&
     history.length === 0
@@ -313,14 +337,46 @@ export function HomePage() {
       {historyLoading && <ContinueWatchingSkeleton />}
       {!historyLoading && history.length > 0 && <ContinueWatchingSection history={history} />}
 
-      {/* 3. 媒体库卡片区（每页展示 20 个媒体库） */}
+      {/* 3. 媒体库标签栏 + 卡片区（每页展示 20 个媒体库） */}
       {sortedLibraries.length > 0 && (
-        <HomeLibrariesSection
-          libraries={sortedLibraries}
-          libraryData={libraryData}
-          libraryCounts={libraryCounts}
-          onNeedPreviews={fetchPreviews}
-        />
+        <section className="space-y-6">
+          <LibraryTagBar
+            tabs={tagTabs}
+            selectedTagId={effectiveTagId}
+            onSelect={libraryTags.setSelectedTagId}
+            onCreate={(name) => {
+              void libraryTags.createTag(name)
+            }}
+            onManage={() => setLibraryTagsOpen(true)}
+            busy={libraryTags.saving}
+          />
+          {libraryTagsOpen && (
+            <ManageLibraryTagsDialogView
+              tags={libraryTags.tags}
+              libraries={libraries}
+              saving={libraryTags.saving}
+              onCreate={libraryTags.createTag}
+              onRename={libraryTags.renameTag}
+              onRemove={libraryTags.removeTag}
+              onReorder={libraryTags.reorderTags}
+              onAssign={libraryTags.assignLibrary}
+              onAssignBatch={libraryTags.assignLibraries}
+              onClose={() => setLibraryTagsOpen(false)}
+            />
+          )}
+          {taggedLibraries.length === 0 ? (
+            <p className="rounded-2xl border border-dashed border-[var(--app-border)] bg-[var(--app-panel)] px-4 py-12 text-center text-sm text-[var(--app-muted)]">
+              「{effectiveTagId}」标签下还没有媒体库，可在「管理标签」里把媒体库归入该标签。
+            </p>
+          ) : (
+            <HomeLibrariesSection
+              libraries={taggedLibraries}
+              libraryData={libraryData}
+              libraryCounts={libraryCounts}
+              onNeedPreviews={fetchPreviews}
+            />
+          )}
+        </section>
       )}
 
       {/* 4. 各媒体库内容展示行（向下滑动渐进流式加载，不受上方20个分页限制） */}

web/src/pages/HomePageSections.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useMemo, useRef, useState, type ReactNode } from 'react'
-import { Link } from 'react-router-dom'
+import { Link, useLocation } from 'react-router-dom'
 import {
   ArrowRight,
   ChevronLeft,
@@ -20,6 +20,7 @@ import {
 import { imageURL } from '../api/client'
 import { useInViewOnce } from '../hooks/useInViewOnce'
 import { useLazyPreviewBatch } from '../hooks/useLazyPreviewBatch'
+import { useRememberedListPosition } from '../hooks/useListPositionMemory'
 import { MediaCard } from '../components/MediaCard'
 import type { HistoryItem } from '../api/playback'
 import type { Library, Media } from '../types'
@@ -371,7 +372,13 @@ export function HomeLibrariesSection({
   title?: string
 }) {
   const PAGE_SIZE = 20
-  const [currentPage, setCurrentPage] = useState(1)
+  // 分页位置按路由分别记忆：首页「媒体库」和 /libraries 的「媒体库入口」
+  // 各自保留自己的页码，进入媒体库详情再返回时不会掉回第一页。
+  const { pathname } = useLocation()
+  const [currentPage, setCurrentPage] = useRememberedListPosition(
+    `libraries-grid:${pathname}`,
+    1,
+  )
   const totalPages = Math.max(1, Math.ceil(libraries.length / PAGE_SIZE))
   const effectivePage = Math.min(currentPage, totalPages)
   const queuePreview = useLazyPreviewBatch((ids) => onNeedPreviews?.(ids, 2))

web/src/pages/LibrariesPage.tsx

@@ -2,9 +2,13 @@ import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 
 import { libraryAPI } from '../api/library'
 import { toolsAPI } from '../api/tools'
+import { LibraryTagBar } from '../components/LibraryTagBar'
+import { ManageLibraryTagsDialogView } from '../components/ManageLibraryTagsDialogView'
 import { openManageLibrariesDialog } from '../components/manageLibrariesDialog'
 import { useEpisodeArtworkPreference } from '../hooks/useEpisodeArtworkPreference'
+import { useLibraryTags } from '../hooks/useLibraryTags'
 import { usePinnedLibraries } from '../hooks/usePinnedLibraries'
+import { useLibraryListSort } from '../hooks/useLibraryListSort'
 import { useAuthStore } from '../stores/auth'
 import {
   LibrariesContent,
@@ -14,19 +18,29 @@ import {
 import type { LibraryPreview } from './librariesPageModel'
 import type { Library } from '../types'
 import type { SeriesCard } from '../utils/groupSeries'
+import {
+  sortLibraryPreviewsByField,
+  type LibraryListSortField,
+  type LibraryListSortOrder,
+} from '../utils/libraryListSort'
 import { fetchLibraries, invalidateLibraries, peekLibraries } from '../utils/libraryCache'
-import { sortLibraryPreviews } from '../utils/pinnedLibraries'
+import { ALL_TAG_ID, buildLibraryTagTabs, filterLibrariesByTag } from '../utils/libraryTags'
+import type { LibraryTag } from '../utils/libraryTags'
 import { partitionPreviewIDs } from '../utils/remoteEmby'
 
 export function LibrariesPage() {
   const isAdmin = useAuthStore((state) => state.user?.role === 'admin')
-  const [libraries, setLibraries] = useState<Library[]>([])
+  // 会话缓存命中时首屏即用缓存渲染（避免先闪一帧占位再被撑高），
+  // 这样 useScrollMemory 的布局期恢复才能在返回列表时立刻落到原位置。
+  const [libraries, setLibraries] = useState<Library[]>(() => peekLibraries() ?? [])
   const [libraryData, setLibraryData] = useState<Record<string, { cards: SeriesCard[]; total: number }>>({})
-  const { pinnedIds, loading: pinnedLoading, togglePin } = usePinnedLibraries()
-  const [loading, setLoading] = useState(true)
+  const { pinnedIds, togglePin } = usePinnedLibraries()
+  const libraryTags = useLibraryTags()
+  const [loading, setLoading] = useState(() => peekLibraries() === null)
   const [repairing, setRepairing] = useState(false)
   const [repairEpisodeArtwork, setRepairEpisodeArtwork] = useEpisodeArtworkPreference()
   const [repairMsg, setRepairMsg] = useState('')
+  const { field: sortField, order: sortOrder, setSort: setLibrarySort } = useLibraryListSort()
 
   // 缓存每个库已加载到的预览数量：入口网格只需要 2 张，横向货架需要 10 张。
   const fetchedPreviewLimitsRef = useRef<Map<string, number>>(new Map())
@@ -140,37 +154,90 @@ export function LibrariesPage() {
     })
   }, [libraries, libraryData])
 
-  const sortedPreviews = useMemo(() => sortLibraryPreviews(previews, pinnedIds), [previews, pinnedIds])
+  const sortedPreviews = useMemo(
+    () => sortLibraryPreviewsByField(previews, pinnedIds, sortField, sortOrder),
+    [previews, pinnedIds, sortField, sortOrder],
+  )
+
+  const handleSortChange = useCallback((field: LibraryListSortField, order: LibraryListSortOrder) => {
+    setLibrarySort(field, order)
+  }, [setLibrarySort])
 
   const handleTogglePin = useCallback((libraryId: string) => {
     void togglePin(libraryId)
   }, [togglePin])
 
-  const total = useMemo(() => previews.reduce((sum, preview) => sum + preview.total, 0), [previews])
+  const [libraryTagsOpen, setLibraryTagsOpen] = useState(false)
+  const effectiveTagId = libraryTags.selectedTagId
+  const tagTabs = useMemo(
+    () => buildLibraryTagTabs(sortedPreviews.map((preview) => preview.library), libraryTags.tags),
+    [sortedPreviews, libraryTags.tags],
+  )
+  const taggedPreviews = useMemo(
+    () => filterPreviewsByTag(sortedPreviews, libraryTags.tags, effectiveTagId),
+    [sortedPreviews, libraryTags.tags, effectiveTagId],
+  )
+  const taggedTotal = useMemo(
+    () => taggedPreviews.reduce((sum, preview) => sum + preview.total, 0),
+    [taggedPreviews],
+  )
 
-  if (loading || pinnedLoading) {
+  if (loading) {
     return <p className="px-2 py-8 text-sm text-sand-500">媒体库加载中…</p>
   }
 
   return (
     <div className="space-y-8">
       <LibrariesHeader
-        previewCount={previews.length}
-        total={total}
+        previewCount={taggedPreviews.length}
+        total={taggedTotal}
         isAdmin={isAdmin}
         repairMsg={repairMsg}
         repairEpisodeArtwork={repairEpisodeArtwork}
         repairing={repairing}
+        sortField={sortField}
+        sortOrder={sortOrder}
+        onSortChange={handleSortChange}
         onRepairEpisodeArtworkChange={setRepairEpisodeArtwork}
         onRepairRescrape={handleRepairRescrape}
         onManageLibraries={handleManageLibraries}
       />
 
+      <LibraryTagBar
+        tabs={tagTabs}
+        selectedTagId={effectiveTagId}
+        onSelect={libraryTags.setSelectedTagId}
+        onCreate={(name) => {
+          void libraryTags.createTag(name)
+        }}
+        onManage={() => setLibraryTagsOpen(true)}
+        busy={libraryTags.saving}
+      />
+
+      {libraryTagsOpen && (
+        <ManageLibraryTagsDialogView
+          tags={libraryTags.tags}
+          libraries={libraries}
+          saving={libraryTags.saving}
+          onCreate={libraryTags.createTag}
+          onRename={libraryTags.renameTag}
+          onRemove={libraryTags.removeTag}
+          onReorder={libraryTags.reorderTags}
+          onAssign={libraryTags.assignLibrary}
+          onAssignBatch={libraryTags.assignLibraries}
+          onClose={() => setLibraryTagsOpen(false)}
+        />
+      )}
+
       {previews.length === 0 ? (
         <LibrariesEmptyState isAdmin={isAdmin} />
+      ) : taggedPreviews.length === 0 ? (
+        <p className="rounded-3xl border border-dashed border-[var(--app-border)] bg-[var(--app-panel)] px-4 py-16 text-center text-sm text-[var(--app-muted)]">
+          「{effectiveTagId}」标签下还没有媒体库，可在「管理标签」里把媒体库归入该标签。
+        </p>
       ) : (
         <LibrariesContent
-          previews={sortedPreviews}
+          previews={taggedPreviews}
           pinnedIds={pinnedIds}
           onTogglePin={handleTogglePin}
           onNeedPreviews={fetchPreviews}
@@ -179,3 +246,18 @@ export function LibrariesPage() {
     </div>
   )
 }
+
+/**
+ * 按选中标签过滤媒体库预览：复用共享的成员筛选（保持输入顺序），
+ * 这样排序下拉（含倒序）在标签页与「全部」页行为一致。
+ */
+function filterPreviewsByTag(previews: LibraryPreview[], tags: LibraryTag[], tagId: string): LibraryPreview[] {
+  if (!tagId || tagId === ALL_TAG_ID) return previews
+  const byId = new Map(previews.map((preview) => [preview.library.id, preview]))
+  const kept: LibraryPreview[] = []
+  for (const library of filterLibrariesByTag(previews.map((preview) => preview.library), tags, tagId)) {
+    const preview = byId.get(library.id)
+    if (preview) kept.push(preview)
+  }
+  return kept
+}

web/src/pages/LibrariesPageSections.tsx

@@ -1,11 +1,18 @@
-import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { useCallback, useEffect, useMemo, useRef } from 'react'
 import { Link } from 'react-router-dom'
 import { Library as LibraryIcon, RefreshCw, Sparkles } from 'lucide-react'
 
 import { EpisodeArtworkToggle } from '../components/EpisodeArtworkToggle'
+import { LibraryListSortDropdown } from '../components/LibraryListSortDropdown'
+import { useRememberedListPosition } from '../hooks/useListPositionMemory'
+import type { LibraryListSortField, LibraryListSortOrder } from '../utils/libraryListSort'
 import { HomeLibrariesSection, HomeLibraryRowSection } from './HomePageSections'
 import type { LibraryPreview } from './librariesPageModel'
 
+// 返回媒体库列表时最多一次性解锁的货架数量：滚动到很深的位置后回来
+// 仍能落到原处，同时避免一次渲染过多货架。上限之外的继续按需解锁。
+const MAX_RESTORED_SHELVES = 15
+
 export function LibrariesHeader({
   previewCount,
   total,
@@ -13,6 +20,9 @@ export function LibrariesHeader({
   repairMsg,
   repairEpisodeArtwork,
   repairing,
+  sortField,
+  sortOrder,
+  onSortChange,
   onRepairEpisodeArtworkChange,
   onRepairRescrape,
   onManageLibraries,
@@ -23,6 +33,9 @@ export function LibrariesHeader({
   repairMsg: string
   repairEpisodeArtwork: boolean
   repairing: boolean
+  sortField: LibraryListSortField
+  sortOrder: LibraryListSortOrder
+  onSortChange: (field: LibraryListSortField, order: LibraryListSortOrder) => void
   onRepairEpisodeArtworkChange: (value: boolean) => void
   onRepairRescrape: () => void
   onManageLibraries: () => void
@@ -35,42 +48,45 @@ export function LibrariesHeader({
           共 {previewCount} 个目录 · {total.toLocaleString()} 个条目。每个目录直接展示最新入库内容。
         </p>
       </div>
-      {isAdmin && (
-        <div className="flex flex-wrap items-center gap-2 sm:gap-3">
-          {repairMsg && <span className="w-full text-xs text-ink-50">{repairMsg}</span>}
-          <EpisodeArtworkToggle
-            checked={repairEpisodeArtwork}
-            onChange={onRepairEpisodeArtworkChange}
-            title="关闭后仍会获取主海报和每集文字元数据，只跳过每集图片"
-            className="h-9 sm:h-10 text-xs sm:text-sm"
-          />
-          <button
-            type="button"
-            onClick={onRepairRescrape}
-            disabled={repairing}
-            className="btn-outline !px-3 !py-1.5 text-xs sm:!px-4 sm:!py-2.5 sm:text-sm disabled:cursor-not-allowed disabled:opacity-60"
-            title="从媒体路径回填缺失/错误的外部 ID，再批量重刮整库"
-          >
-            <RefreshCw size={14} className={repairing ? 'animate-spin' : ''} />
-            {repairing ? '正在启动…' : '全库修复+重刮'}
-          </button>
-          <Link
-            to="/scraper/queue"
-            className="btn-outline inline-flex items-center gap-1.5 !px-3 !py-1.5 text-xs sm:!px-4 sm:!py-2.5 sm:text-sm"
-            title="查看正在进行的刮削任务与进度"
-          >
-            <Sparkles size={14} className="text-brand-500" />
-            <span>刮削队列</span>
-          </Link>
-          <button
-            type="button"
-            onClick={onManageLibraries}
-            className="btn-outline !px-3 !py-1.5 text-xs sm:!px-4 sm:!py-2.5 sm:text-sm"
-          >
-            管理媒体库
-          </button>
-        </div>
-      )}
+      <div className="flex flex-wrap items-center gap-2 sm:gap-3">
+        <LibraryListSortDropdown value={sortField} order={sortOrder} onChange={onSortChange} />
+        {isAdmin && (
+          <>
+            {repairMsg && <span className="w-full text-xs text-ink-50">{repairMsg}</span>}
+            <EpisodeArtworkToggle
+              checked={repairEpisodeArtwork}
+              onChange={onRepairEpisodeArtworkChange}
+              title="关闭后仍会获取主海报和每集文字元数据，只跳过每集图片"
+              className="h-9 sm:h-10 text-xs sm:text-sm"
+            />
+            <button
+              type="button"
+              onClick={onRepairRescrape}
+              disabled={repairing}
+              className="btn-outline !px-3 !py-1.5 text-xs sm:!px-4 sm:!py-2.5 sm:text-sm disabled:cursor-not-allowed disabled:opacity-60"
+              title="从媒体路径回填缺失/错误的外部 ID，再批量重刮整库"
+            >
+              <RefreshCw size={14} className={repairing ? 'animate-spin' : ''} />
+              {repairing ? '正在启动…' : '全库修复+重刮'}
+            </button>
+            <Link
+              to="/scraper/queue"
+              className="btn-outline inline-flex items-center gap-1.5 !px-3 !py-1.5 text-xs sm:!px-4 sm:!py-2.5 sm:text-sm"
+              title="查看正在进行的刮削任务与进度"
+            >
+              <Sparkles size={14} className="text-brand-500" />
+              <span>刮削队列</span>
+            </Link>
+            <button
+              type="button"
+              onClick={onManageLibraries}
+              className="btn-outline !px-3 !py-1.5 text-xs sm:!px-4 sm:!py-2.5 sm:text-sm"
+            >
+              管理媒体库
+            </button>
+          </>
+        )}
+      </div>
     </div>
   )
 }
@@ -100,7 +116,12 @@ export function LibrariesContent({
   // 下方媒体库货架继续按需解锁：首屏先展示前 3 个，滚动接近底部再加载 2 个。
   const INITIAL_SHELVES = 3
   const STEP_SHELVES = 2
-  const [visibleCount, setVisibleCount] = useState(INITIAL_SHELVES)
+  // 货架解锁数量同样跨路由记忆：进入媒体库详情再返回不会从头解锁。
+  const [visibleCount, setVisibleCount] = useRememberedListPosition(
+    'libraries-shelves',
+    INITIAL_SHELVES,
+    MAX_RESTORED_SHELVES,
+  )
   const sentinelRef = useRef<HTMLButtonElement | null>(null)
   const userScrolledRef = useRef(false)
 
@@ -109,7 +130,7 @@ export function LibrariesContent({
       if (prev >= previews.length) return prev
       return Math.min(prev + STEP_SHELVES, previews.length)
     })
-  }, [previews.length])
+  }, [previews.length, setVisibleCount])
 
   useEffect(() => {
     const currentTargets = previews.slice(0, visibleCount).map((preview) => preview.library.id)

web/src/pages/LibraryMovieActions.tsx

@@ -30,7 +30,7 @@ export function LibraryMovieActions({
   }
 
   return (
-    <>
+    <div className="hidden flex-wrap justify-end gap-1 sm:flex">
       <button title="智能刮削" disabled={busy} onClick={() => onSmartScrape(media)} className={buttonClass}>
         <Sparkles size={13} />
       </button>
@@ -46,6 +46,6 @@ export function LibraryMovieActions({
       <button title="删除" disabled={busy} onClick={() => onDelete(media)} className={`${buttonClass} hover:!bg-red-50 hover:!text-red-500`}>
         <Trash2 size={13} />
       </button>
-    </>
+    </div>
   )
 }

web/src/pages/useLibraryData.ts

@@ -6,6 +6,7 @@ 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'
+import { MAX_RESTORE_PAGES, readListPosition, writeListPosition } from '../hooks/useListPositionMemory'
 
 export function useLibraryData(
   libraryID: string,
@@ -43,6 +44,84 @@ export function useLibraryData(
   const modeRef = useRef<'media' | 'series'>('media')
   const moreInFlightRef = useRef(false)
 
+  // 分页位置按「媒体库 + 排序」记忆：详情页返回、甚至换完排序再切回来，
+  // 都能回到上次加载到的页数。
+  const positionKey = `library:${libraryID}:${sortField}:${sortOrder}`
+
+  // 拉取并追加下一页。滚动哨兵、按钮和首屏分页恢复共用这一条路径，
+  // 避免两套分页逻辑各自算页码。
+  const appendNextPage = useCallback(async (options?: { remember?: boolean }) => {
+    const lib = libraryRef.current
+    if (!lib || !hasMoreRef.current) return false
+    const seq = requestSeqRef.current
+    const page = nextPageRef.current
+    try {
+      if (modeRef.current === 'series') {
+        const data = await libraryAPI.listSeries(libraryID, page, pageSizeFor(lib), {
+          sort: sortField,
+          order: sortOrder,
+        })
+        if (seq !== requestSeqRef.current) return false
+        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), {
+          sort: sortField,
+          order: sortOrder,
+        })
+        if (seq !== requestSeqRef.current) return false
+        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)
+      if (options?.remember !== false) writeListPosition(positionKey, page)
+      return true
+    } catch {
+      if (seq === requestSeqRef.current) {
+        toast.error('媒体库加载失败')
+        hasMoreRef.current = false
+        setHasMore(false)
+      }
+      return false
+    }
+  }, [libraryID, positionKey, sortField, sortOrder])
+
+  const loadMore = useCallback(async (options?: { remember?: boolean }) => {
+    if (moreInFlightRef.current || !hasMoreRef.current) return
+    moreInFlightRef.current = true
+    setLoadingMore(true)
+    try {
+      await appendNextPage(options)
+    } finally {
+      moreInFlightRef.current = false
+      setLoadingMore(false)
+    }
+  }, [appendNextPage])
+
+  const loadAll = useCallback(async () => {
+    const seq = requestSeqRef.current
+    setLoadingMore(true)
+    try {
+      while (seq === requestSeqRef.current && hasMoreRef.current) {
+        // 一次拉全量（random 排序前的准备）不代表用户的分页位置，不写入记忆。
+        await loadMore({ remember: false })
+        if (seq !== requestSeqRef.current || !hasMoreRef.current) break
+        await yieldToBrowser()
+      }
+    } finally {
+      if (seq === requestSeqRef.current) setLoadingMore(false)
+    }
+  }, [loadMore])
+
   useEffect(() => {
     if (!libraryID) return
     const seq = ++requestSeqRef.current
@@ -106,6 +185,19 @@ export function useLibraryData(
         setTotal(totalRef.current)
         hasMoreRef.current = loadedCountRef.current < totalRef.current
         setHasMore(hasMoreRef.current)
+
+        // 按记忆的分页位置把后续页补回来：从详情页返回时直接回到上次翻到的
+        // 位置，而不是只剩第一页。超出上限的部分继续交给底部哨兵按需加载。
+        const restoreTarget = Math.min(readListPosition(positionKey, 1), MAX_RESTORE_PAGES)
+        while (
+          !cancelled &&
+          seq === requestSeqRef.current &&
+          hasMoreRef.current &&
+          nextPageRef.current <= restoreTarget
+        ) {
+          const advanced = await appendNextPage()
+          if (!advanced) break
+        }
       } catch {
         if (!cancelled && seq === requestSeqRef.current) {
           toast.error('媒体库加载失败')
@@ -122,7 +214,7 @@ export function useLibraryData(
       cancelled = true
       requestSeqRef.current += 1
     }
-  }, [libraryID, reloadTick, sortField, sortOrder])
+  }, [appendNextPage, libraryID, positionKey, reloadTick, sortField, sortOrder])
 
   useEffect(() => {
     if (!libraryID || !isSeriesLibrary || !selectedSeries) {
@@ -146,65 +238,6 @@ export function useLibraryData(
     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), {
-          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), {
-          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)
   }, [])

web/src/types/auth.ts

@@ -1,3 +1,5 @@
+import type { LibraryTagSet } from './library'
+
 export interface User {
   id: string
   username: string
@@ -16,6 +18,8 @@ export interface User {
   is_active: boolean
   allowed_library_ids?: string[]
   pinned_library_ids?: string[]
+  /** 当前用户维护的媒体库标签分组。 */
+  library_tags?: LibraryTagSet[]
   is_default_admin?: boolean
   is_protected?: boolean
   realtime_online?: boolean

web/src/types/library.ts

@@ -28,6 +28,15 @@ export interface Library {
   total?: number
 }
 
+/**
+ * 用户自定义的媒体库标签分组。标签属于当前用户本人，用于在媒体库页把
+ * 同一标签下的媒体库聚合到一起。一个媒体库同时只属于一个标签。
+ */
+export interface LibraryTagSet {
+  name: string
+  library_ids: string[]
+}
+
 export interface ScanResult {
   library_id: string
   visited: number

web/src/utils/libraryListSort.test.ts

@@ -0,0 +1,92 @@
+import {
+  DEFAULT_LIBRARY_LIST_SORT_FIELD,
+  DEFAULT_LIBRARY_LIST_SORT_ORDER,
+  readLibraryListSort,
+  sortLibrariesByField,
+  sortLibraryPreviewsByField,
+} from './libraryListSort.ts'
+import type { Library } from '../types/index.ts'
+
+function check(name: string, condition: boolean) {
+  if (!condition) throw new Error(`libraryListSort: ${name}`)
+}
+
+function lib(id: string, name: string, sortOrder = 0): Library {
+  return { id, name, sort_order: sortOrder } as Library
+}
+
+const ordered = (libs: Library[]) => libs.map((item) => item.id).join(',')
+
+// 首页默认就是「库名倒序」，所以没写过偏好时要拿到 name/desc。
+const fallback = readLibraryListSort()
+check(
+  'default preference is name descending',
+  fallback.field === 'name' && fallback.order === 'desc',
+)
+check(
+  'default constants stay in sync with the fallback',
+  DEFAULT_LIBRARY_LIST_SORT_FIELD === 'name' && DEFAULT_LIBRARY_LIST_SORT_ORDER === 'desc',
+)
+
+const alpha = [lib('a', '动画'), lib('b', '电影'), lib('c', '纪录片')]
+// zh-CN 拼音升序是 电影(b) → 动画(a) → 纪录片(c)。
+check(
+  'name descending is the default order',
+  ordered(sortLibrariesByField(alpha, [], 'name', 'desc')) === 'c,a,b',
+)
+check(
+  'name ascending reverses it',
+  ordered(sortLibrariesByField(alpha, [], 'name', 'asc')) === 'b,a,c',
+)
+
+const manual = [lib('a', '动画', 2), lib('b', '电影', 0), lib('c', '纪录片', 1)]
+check(
+  'manual order ascending follows sort_order',
+  ordered(sortLibrariesByField(manual, [], 'sort_order', 'asc')) === 'b,c,a',
+)
+check(
+  'manual order descending flips sort_order',
+  ordered(sortLibrariesByField(manual, [], 'sort_order', 'desc')) === 'a,c,b',
+)
+
+// 置顶只决定分组：置顶库整体在前，组内仍然按当前字段/方向排。
+check(
+  'pinned libraries always come first',
+  ordered(sortLibrariesByField(alpha, ['c'], 'name', 'desc')) === 'c,a,b',
+)
+check(
+  'pinned group is sorted by the active field too',
+  ordered(sortLibrariesByField(alpha, ['a', 'c'], 'name', 'desc')) === 'c,a,b',
+)
+check(
+  'pinned ids that no longer exist are ignored',
+  ordered(sortLibrariesByField(alpha, ['missing'], 'name', 'desc')) === 'c,a,b',
+)
+
+// 同名时按 sort_order 兜底，再按 id 兜底，保证顺序稳定。
+const sameName = [lib('b', '动画', 1), lib('a', '动画', 1), lib('c', '动画', 0)]
+check(
+  'equal names fall back to sort_order then id',
+  ordered(sortLibrariesByField(sameName, [], 'name', 'desc')) === 'c,a,b',
+)
+
+check('single library is returned as-is', sortLibrariesByField([lib('a', '动画')], [], 'name', 'desc').length === 1)
+
+const previews = [
+  { library: lib('a', '动画'), total: 1 },
+  { library: lib('b', '电影'), total: 2 },
+]
+check(
+  'previews follow the library order',
+  sortLibraryPreviewsByField(previews, [], 'name', 'desc').map((item) => item.library.id).join(',') === 'a,b',
+)
+check(
+  'previews keep their payload after sorting',
+  sortLibraryPreviewsByField(previews, [], 'name', 'desc')[0].total === 1,
+)
+check(
+  'previews respect pinning',
+  sortLibraryPreviewsByField(previews, ['b'], 'name', 'desc').map((item) => item.library.id).join(',') === 'b,a',
+)
+
+console.log('libraryListSort.test.ts ok')

web/src/utils/libraryListSort.ts

@@ -0,0 +1,122 @@
+import type { Library } from '../types'
+
+export type LibraryListSortField = 'name' | 'sort_order'
+export type LibraryListSortOrder = 'asc' | 'desc'
+
+export type LibraryListSortOption = {
+  id: LibraryListSortField
+  label: string
+  defaultOrder: LibraryListSortOrder
+}
+
+export const LIBRARY_LIST_SORT_OPTIONS: LibraryListSortOption[] = [
+  { id: 'name', label: '库名', defaultOrder: 'desc' },
+  { id: 'sort_order', label: '手动顺序', defaultOrder: 'asc' },
+]
+
+export const DEFAULT_LIBRARY_LIST_SORT_FIELD: LibraryListSortField = 'name'
+export const DEFAULT_LIBRARY_LIST_SORT_ORDER: LibraryListSortOrder = 'desc'
+
+const FIELD_KEY = 'mebox_libraries_sort_field'
+const ORDER_KEY = 'mebox_libraries_sort_order'
+
+export function readLibraryListSort(): { field: LibraryListSortField; order: LibraryListSortOrder } {
+  if (typeof window === 'undefined') {
+    return { field: DEFAULT_LIBRARY_LIST_SORT_FIELD, order: DEFAULT_LIBRARY_LIST_SORT_ORDER }
+  }
+  const rawField = window.localStorage.getItem(FIELD_KEY)
+  const rawOrder = window.localStorage.getItem(ORDER_KEY)
+  const field: LibraryListSortField =
+    rawField === 'name' || rawField === 'sort_order' ? rawField : DEFAULT_LIBRARY_LIST_SORT_FIELD
+  const order: LibraryListSortOrder =
+    rawOrder === 'asc' || rawOrder === 'desc'
+      ? rawOrder
+      : field === 'name'
+        ? DEFAULT_LIBRARY_LIST_SORT_ORDER
+        : 'asc'
+  return { field, order }
+}
+
+export function writeLibraryListSort(field: LibraryListSortField, order: LibraryListSortOrder): void {
+  if (typeof window === 'undefined') return
+  window.localStorage.setItem(FIELD_KEY, field)
+  window.localStorage.setItem(ORDER_KEY, order)
+}
+
+function compareNames(a: string, b: string, order: LibraryListSortOrder): number {
+  const cmp = a.localeCompare(b, 'zh-CN', { numeric: true, sensitivity: 'base' })
+  return order === 'asc' ? cmp : -cmp
+}
+
+function compareSortOrder(a: number, b: number, order: LibraryListSortOrder): number {
+  const cmp = a - b
+  return order === 'asc' ? cmp : -cmp
+}
+
+function librarySortKey(library: Library): { name: string; sortOrder: number } {
+  return {
+    name: (library.name || '').trim(),
+    sortOrder: library.sort_order ?? 0,
+  }
+}
+
+function compareLibraries(a: Library, b: Library, field: LibraryListSortField, order: LibraryListSortOrder): number {
+  const ka = librarySortKey(a)
+  const kb = librarySortKey(b)
+  if (field === 'name') {
+    const byName = compareNames(ka.name, kb.name, order)
+    if (byName !== 0) return byName
+    return compareSortOrder(ka.sortOrder, kb.sortOrder, 'asc') || a.id.localeCompare(b.id)
+  }
+  const byOrder = compareSortOrder(ka.sortOrder, kb.sortOrder, order)
+  if (byOrder !== 0) return byOrder
+  return compareNames(ka.name, kb.name, 'asc') || a.id.localeCompare(b.id)
+}
+
+/**
+ * 置顶组始终在前；组内按 field/order 排序。
+ * pinnedIds 的相对顺序只决定「是否置顶」，组内不再保留置顶拖拽序。
+ *
+ * 首页与 /libraries 共用这份排序，保证两处的媒体库顺序一致。
+ */
+export function sortLibrariesByField(
+  libraries: Library[],
+  pinnedIds: string[],
+  field: LibraryListSortField,
+  order: LibraryListSortOrder,
+): Library[] {
+  if (libraries.length < 2) return libraries
+
+  const pinnedRank = new Map(pinnedIds.map((id, index) => [id, index]))
+  const pinned: Library[] = []
+  const rest: Library[] = []
+  for (const library of libraries) {
+    if (pinnedRank.has(library.id)) pinned.push(library)
+    else rest.push(library)
+  }
+
+  const byField = (a: Library, b: Library) => compareLibraries(a, b, field, order)
+  pinned.sort(byField)
+  rest.sort(byField)
+  return [...pinned, ...rest]
+}
+
+/** 预览列表按库排序：先排库，再按排好的库顺序取回对应预览。 */
+export function sortLibraryPreviewsByField<T extends { library: Library }>(
+  items: T[],
+  pinnedIds: string[],
+  field: LibraryListSortField,
+  order: LibraryListSortOrder,
+): T[] {
+  if (items.length < 2) return items
+  const ordered = sortLibrariesByField(
+    items.map((item) => item.library),
+    pinnedIds,
+    field,
+    order,
+  )
+  const byId = new Map(items.map((item) => [item.library.id, item]))
+  return ordered
+    .map((library) => byId.get(library.id))
+    .filter((item): item is T => item !== undefined)
+}

web/src/utils/libraryTags.test.ts

@@ -0,0 +1,166 @@
+import {
+  ALL_TAG_ID,
+  assignLibrariesToTag,
+  attachLibrariesToTag,
+  attachLibraryToTag,
+  buildLibraryTagTabs,
+  dedupeLibraryTags,
+  detachLibrariesFromTag,
+  detachLibraryFromTag,
+  filterLibrariesByTag,
+  filterLibrariesForTagging,
+  normalizeLibraryTags,
+  normalizeTagName,
+  reorderLibraryTags,
+  resolveSelectedTagId,
+  tagNameError,
+} from './libraryTags.ts'
+
+function check(name: string, condition: boolean) {
+  if (!condition) throw new Error(`libraryTags: ${name}`)
+}
+
+const libs = [
+  { id: 'lib-a', total: 10 },
+  { id: 'lib-b', total: 5 },
+  { id: 'lib-c', total: 0 },
+]
+
+check('empty input normalizes to empty list', normalizeLibraryTags(null).length === 0)
+check('trims and drops blank names', normalizeLibraryTags([{ name: '  ', library_ids: [] }]).length === 0)
+check(
+  'merges duplicate tag names case-insensitively',
+  normalizeLibraryTags([
+    { name: 'Anime', library_ids: ['a'] },
+    { name: 'anime', library_ids: ['b', 'a'] },
+  ]).length === 1,
+)
+check(
+  'dedupes ids inside one tag',
+  normalizeLibraryTags([{ name: '动画', library_ids: ['a', '', 'a', 'b'] }])[0].library_ids.join(',') === 'a,b',
+)
+check('truncates over-long names to 24 chars', Array.from(normalizeTagName('x'.repeat(40))).length === 24)
+
+const tabs = buildLibraryTagTabs(libs, [
+  { name: '动画', library_ids: ['lib-b', 'missing'] },
+  { name: '电影', library_ids: [] },
+])
+check('tab bar always starts with 全部', tabs[0].id === ALL_TAG_ID && tabs[0].count === 3)
+check('tag tab keeps creation order', tabs[1].name === '动画' && tabs[2].name === '电影')
+check('tag count ignores unavailable libraries', tabs[1].count === 1)
+
+check(
+  'filtering drops unknown ids and keeps input order',
+  filterLibrariesByTag(libs, [{ name: '动画', library_ids: ['lib-c', 'missing', 'lib-a'] }], '动画')
+    .map((lib) => lib.id)
+    .join(',') === 'lib-a,lib-c',
+)
+check('全部 returns every library in original order', filterLibrariesByTag(libs, [], ALL_TAG_ID).length === 3)
+check('unknown tag yields no libraries', filterLibrariesByTag(libs, [], 'nope').length === 0)
+
+check(
+  'selected tag falls back to 全部 when the tag is gone',
+  resolveSelectedTagId([{ name: '动画', library_ids: [] }], '动画') === '动画' &&
+    resolveSelectedTagId([{ name: '动画', library_ids: [] }], '电影') === ALL_TAG_ID,
+)
+
+const claimed = dedupeLibraryTags([
+  { name: '动画', library_ids: ['a', 'b'] },
+  { name: '电影', library_ids: ['b', 'c'] },
+])
+check('one library belongs to a single tag', claimed[0].library_ids.join(',') === 'a,b')
+check('later tag loses the shared library', claimed[1].library_ids.join(',') === 'c')
+
+const attached = attachLibraryToTag(
+  [
+    { name: '动画', library_ids: ['a'] },
+    { name: '电影', library_ids: ['b'] },
+  ],
+  'a',
+  '电影',
+)
+check('attach moves the library out of its old tag', attached[0].library_ids.length === 0)
+check('attach appends to the target tag', attached[1].library_ids.join(',') === 'b,a')
+
+const detached = detachLibraryFromTag(
+  [{ name: '电影', library_ids: ['b', 'a'] }],
+  'a',
+  '电影',
+)
+check('detach removes only the requested library', detached[0].library_ids.join(',') === 'b')
+
+const batchAttached = attachLibrariesToTag(
+  [
+    { name: '动画', library_ids: ['a', 'x'] },
+    { name: '电影', library_ids: ['b'] },
+  ],
+  ['b', 'x', 'b', ' missing '],
+  '动画',
+)
+check('batch attach moves every id out of its old tag', batchAttached[1].library_ids.length === 0)
+check('batch attach keeps order and dedupes ids', batchAttached[0].library_ids.join(',') === 'a,b,x,missing')
+check('batch attach ignores unknown target tag', attachLibrariesToTag([{ name: '动画', library_ids: [] }], ['a'], '不存在')[0].library_ids.length === 0)
+check('batch attach with no ids is a no-op', attachLibrariesToTag([{ name: '动画', library_ids: ['a'] }], [], '动画')[0].library_ids.join(',') === 'a')
+
+const batchDetached = detachLibrariesFromTag(
+  [
+    { name: '动画', library_ids: ['a', 'b'] },
+    { name: '电影', library_ids: ['b', 'c'] },
+  ],
+  ['b', 'c'],
+)
+check('batch detach removes ids from every tag', batchDetached[0].library_ids.join(',') === 'a')
+check('batch detach clears emptied tags', batchDetached[1].library_ids.length === 0)
+check(
+  'assign with empty tag name clears everything',
+  assignLibrariesToTag([{ name: '动画', library_ids: ['a'] }], ['a'], '')[0].library_ids.length === 0,
+)
+check(
+  'assign with a tag routes to attach',
+  assignLibrariesToTag([{ name: '动画', library_ids: [] }], ['a'], '动画')[0].library_ids.join(',') === 'a',
+)
+
+const searchable = [
+  { id: 'lib-a', name: '电影库', path: '/media/movies', type: 'movie' },
+  { id: 'lib-b', name: 'TV Shows', path: '/media/tv', type: 'tv' },
+]
+check('tagging search matches name', filterLibrariesForTagging(searchable as never, '电影').length === 1)
+check('tagging search matches path', filterLibrariesForTagging(searchable as never, 'media/tv').length === 1)
+check('tagging search matches type case-insensitively', filterLibrariesForTagging(searchable as never, 'MOVIE').length === 1)
+check('tagging search with blank keyword returns all', filterLibrariesForTagging(searchable as never, '  ').length === 2)
+
+check('blank name is rejected', tagNameError('   ', []) !== '')
+check('duplicate name is rejected', tagNameError('动画', [{ name: '动画', library_ids: [] }]) !== '')
+check(
+  'renaming a tag to itself is allowed',
+  tagNameError('动画', [{ name: '动画', library_ids: [] }], '动画') === '',
+)
+
+const reorderable = [
+  { name: '动画', library_ids: [] },
+  { name: '电影', library_ids: [] },
+  { name: '音乐', library_ids: [] },
+]
+check(
+  'reorder moves a tag to the requested slot',
+  reorderLibraryTags(reorderable, ['电影', '动画', '音乐']).map((tag) => tag.name).join(',') === '电影,动画,音乐',
+)
+check(
+  'reorder can move a tag to the front',
+  reorderLibraryTags(reorderable, ['音乐', '动画', '电影']).map((tag) => tag.name).join(',') === '音乐,动画,电影',
+)
+check(
+  'names missing from the order keep relative order at the end',
+  reorderLibraryTags(reorderable, ['电影']).map((tag) => tag.name).join(',') === '电影,动画,音乐',
+)
+check(
+  'empty order leaves tags untouched',
+  reorderLibraryTags(reorderable, []).map((tag) => tag.name).join(',') === '动画,电影,音乐',
+)
+check('reorder ignores extra unknown names', reorderLibraryTags(reorderable, ['不存在', '音乐']).map((tag) => tag.name).join(',') === '音乐,动画,电影')
+check(
+  'reordering with fewer than two tags is a no-op',
+  reorderLibraryTags([{ name: '动画', library_ids: [] }], []).map((tag) => tag.name).join(',') === '动画',
+)
+
+console.log('libraryTags.test.ts ok')

web/src/utils/libraryTags.ts

@@ -0,0 +1,309 @@
+import type { Library, LibraryTagSet } from '../types'
+
+/** 与后端 model.MaxLibraryTagNameLen 保持一致。 */
+export const MAX_TAG_NAME_LENGTH = 24
+/** 与后端 model.MaxLibraryTags 保持一致。 */
+export const MAX_LIBRARY_TAGS = 50
+
+/** 「全部」伪标签：不参与持久化，仅用于标签栏选中项。 */
+export const ALL_TAG_ID = '__all__'
+
+export type LibraryTag = LibraryTagSet
+
+export type LibraryTagTab = {
+  /** 选中的稳定标识：ALL_TAG_ID 或标签名。 */
+  id: string
+  name: string
+  count: number
+  /** 是否为「全部」标签栏 */
+  isAll: boolean
+}
+
+const STORAGE_KEY = 'mebox_library_tags'
+const SELECTED_KEY = 'mebox_library_tag_selected'
+
+/** 标签名去空白并按字符数截断，与后端清洗规则一致。 */
+export function normalizeTagName(name: string): string {
+  return Array.from(name.trim()).slice(0, MAX_TAG_NAME_LENGTH).join('').trim()
+}
+
+export function normalizeLibraryTags(tags: unknown): LibraryTag[] {
+  if (!Array.isArray(tags)) return []
+  const out: LibraryTag[] = []
+  const indexByName = new Map<string, number>()
+  for (const raw of tags) {
+    if (!raw || typeof raw !== 'object') continue
+    const name = normalizeTagName(String((raw as LibraryTagSet).name ?? ''))
+    if (!name) continue
+    const key = name.toLowerCase()
+    let pos = indexByName.get(key)
+    if (pos === undefined) {
+      if (out.length >= MAX_LIBRARY_TAGS) break
+      out.push({ name, library_ids: [] })
+      pos = out.length - 1
+      indexByName.set(key, pos)
+    }
+    const ids = (raw as LibraryTagSet).library_ids
+    if (!Array.isArray(ids)) continue
+    const seen = new Set(out[pos].library_ids)
+    for (const id of ids) {
+      const trimmed = String(id ?? '').trim()
+      if (!trimmed || seen.has(trimmed)) continue
+      seen.add(trimmed)
+      out[pos].library_ids.push(trimmed)
+    }
+  }
+  return out
+}
+
+/** 读取本地兜底缓存：接口不可用时标签栏仍然可用。 */
+export function readCachedLibraryTags(): LibraryTag[] {
+  if (typeof window === 'undefined') return []
+  try {
+    return normalizeLibraryTags(JSON.parse(window.localStorage.getItem(STORAGE_KEY) ?? '[]'))
+  } catch {
+    return []
+  }
+}
+
+export function writeCachedLibraryTags(tags: LibraryTag[]): void {
+  if (typeof window === 'undefined') return
+  try {
+    if (tags.length === 0) {
+      window.localStorage.removeItem(STORAGE_KEY)
+      return
+    }
+    window.localStorage.setItem(STORAGE_KEY, JSON.stringify(tags))
+  } catch {
+    // 私密模式等场景忽略存储失败。
+  }
+}
+
+export function readSelectedTagId(): string {
+  if (typeof window === 'undefined') return ALL_TAG_ID
+  try {
+    return window.localStorage.getItem(SELECTED_KEY)?.trim() || ALL_TAG_ID
+  } catch {
+    return ALL_TAG_ID
+  }
+}
+
+export function writeSelectedTagId(tagId: string): void {
+  if (typeof window === 'undefined') return
+  try {
+    if (!tagId || tagId === ALL_TAG_ID) {
+      window.localStorage.removeItem(SELECTED_KEY)
+      return
+    }
+    window.localStorage.setItem(SELECTED_KEY, tagId)
+  } catch {
+    // 同上。
+  }
+}
+
+export async function loadLibraryTags(): Promise<LibraryTag[]> {
+  const { profileAPI } = await import('../api/profile')
+  const remote = normalizeLibraryTags(await profileAPI.getLibraryTags())
+  writeCachedLibraryTags(remote)
+  return remote
+}
+
+export async function saveLibraryTags(tags: LibraryTag[]): Promise<LibraryTag[]> {
+  const { profileAPI } = await import('../api/profile')
+  const saved = normalizeLibraryTags(await profileAPI.setLibraryTags(normalizeLibraryTags(tags)))
+  writeCachedLibraryTags(saved)
+  return saved
+}
+
+/**
+ * 把标签集合中的媒体库 ID 收敛为「每个库只归属一个标签」：越靠前的标签优先，
+ * 后面的标签里重复出现的库会被移除。与后端 SetLibraryTags 的语义一致。
+ */
+export function dedupeLibraryTags(tags: LibraryTag[]): LibraryTag[] {
+  const claimed = new Set<string>()
+  return tags.map((tag) => {
+    const libraryIds: string[] = []
+    for (const id of tag.library_ids) {
+      if (claimed.has(id)) continue
+      claimed.add(id)
+      libraryIds.push(id)
+    }
+    return { ...tag, library_ids: libraryIds }
+  })
+}
+
+/** 标签名是否可用：非空、未超长、且（除了自身以外）没有重名。 */
+export function tagNameError(name: string, tags: LibraryTag[], exceptName?: string): string {
+  const trimmed = normalizeTagName(name)
+  if (!trimmed) return '标签名不能为空'
+  if (Array.from(name.trim()).length > MAX_TAG_NAME_LENGTH) {
+    return `标签名最多 ${MAX_TAG_NAME_LENGTH} 个字`
+  }
+  const key = trimmed.toLowerCase()
+  const selfKey = exceptName ? normalizeTagName(exceptName).toLowerCase() : ''
+  if (key !== selfKey && tags.some((tag) => tag.name.toLowerCase() === key)) {
+    return '标签名已存在'
+  }
+  return ''
+}
+
+export function findTagIdByName(tags: LibraryTag[], name: string): string {
+  const key = normalizeTagName(name).toLowerCase()
+  if (!key) return ''
+  return tags.find((tag) => tag.name.toLowerCase() === key)?.name ?? ''
+}
+
+export function tagLibraryIds(tags: LibraryTag[], tagId: string): string[] {
+  if (!tagId || tagId === ALL_TAG_ID) return []
+  const tag = tags.find((item) => item.name === tagId)
+  return tag ? tag.library_ids : []
+}
+
+export function isLibraryInTag(tags: LibraryTag[], tagId: string, libraryId: string): boolean {
+  return tagLibraryIds(tags, tagId).includes(libraryId)
+}
+
+/**
+ * 按标签过滤媒体库：`tagId` 为「全部」时原样返回。
+ * 只做成员筛选、保持输入顺序，展示顺序（置顶、排序下拉等）由调用方决定；
+ * 标签里记录的 library_ids 顺序只表示归属，不作为展示排序。
+ */
+export function filterLibrariesByTag<T extends { id: string }>(
+  libraries: T[],
+  tags: LibraryTag[],
+  tagId: string,
+): T[] {
+  if (!tagId || tagId === ALL_TAG_ID) return libraries
+  const ids = new Set(tagLibraryIds(tags, tagId))
+  if (ids.size === 0) return []
+  return libraries.filter((lib) => ids.has(lib.id))
+}
+
+/** 生成标签栏模型：首项固定为「全部」，其后按标签顺序追加。 */
+export function buildLibraryTagTabs(libraries: Library[], tags: LibraryTag[]): LibraryTagTab[] {
+  const tabs: LibraryTagTab[] = [
+    { id: ALL_TAG_ID, name: '全部', count: libraries.length, isAll: true },
+  ]
+  if (tags.length === 0) return tabs
+  const available = new Set(libraries.map((lib) => lib.id))
+  for (const tag of tags) {
+    tabs.push({
+      id: tag.name,
+      name: tag.name,
+      count: tag.library_ids.filter((id) => available.has(id)).length,
+      isAll: false,
+    })
+  }
+  return tabs
+}
+
+/**
+ * 按给定标签名顺序重排标签栏：`orderedNames` 是期望的标签名顺序（通常来自拖拽后的顺序）。
+ * 未出现在顺序里的标签（例如新建、旧数据并发写入）保持原相对顺序，追加到末尾，绝不丢失。
+ */
+export function reorderLibraryTags(tags: LibraryTag[], orderedNames: string[]): LibraryTag[] {
+  if (tags.length < 2) return tags
+  const rank = new Map(orderedNames.map((name, index) => [name, index]))
+  const ranked: LibraryTag[] = []
+  const rest: LibraryTag[] = []
+  for (const tag of tags) {
+    ;(rank.has(tag.name) ? ranked : rest).push(tag)
+  }
+  ranked.sort((a, b) => (rank.get(a.name) ?? 0) - (rank.get(b.name) ?? 0))
+  return [...ranked, ...rest]
+}
+
+/** 选中的标签是否仍存在；被删除或被过滤掉时回落到「全部」。 */
+export function resolveSelectedTagId(tags: LibraryTag[], selectedId: string): string {
+  if (!selectedId || selectedId === ALL_TAG_ID) return ALL_TAG_ID
+  return tags.some((tag) => tag.name === selectedId) ? selectedId : ALL_TAG_ID
+}
+
+/** 标签下的媒体库条目总数（用于标题文案）。 */
+export function sumLibraryTotals(libraries: Library[]): number {
+  return libraries.reduce((sum, lib) => sum + (lib.total ?? 0), 0)
+}
+
+/** 把一个媒体库挂到标签下：会先从原标签移除，保证一库一标签。 */
+export function attachLibraryToTag(tags: LibraryTag[], libraryId: string, tagName: string): LibraryTag[] {
+  const target = findTagIdByName(tags, tagName)
+  if (!target) return tags
+  const next = tags.map((tag) => ({
+    ...tag,
+    library_ids: tag.library_ids.filter((id) => id !== libraryId),
+  }))
+  return next.map((tag) =>
+    tag.name === target ? { ...tag, library_ids: [...tag.library_ids, libraryId] } : tag,
+  )
+}
+
+/** 从标签下移除媒体库。 */
+export function detachLibraryFromTag(tags: LibraryTag[], libraryId: string, tagName: string): LibraryTag[] {
+  return tags.map((tag) =>
+    tag.name === tagName ? { ...tag, library_ids: tag.library_ids.filter((id) => id !== libraryId) } : tag,
+  )
+}
+
+/**
+ * 批量把一个或多个媒体库挂到标签下：先从各自原标签移除，再按传入顺序追加，
+ * 保证「一库一标签」。整批只产生一次写入。
+ */
+export function attachLibrariesToTag(
+  tags: LibraryTag[],
+  libraryIds: string[],
+  tagName: string,
+): LibraryTag[] {
+  const target = findTagIdByName(tags, tagName)
+  const moving = normalizeLibraryIds(libraryIds)
+  if (!target || moving.length === 0) return tags
+  const movingSet = new Set(moving)
+  const next = tags.map((tag) => ({
+    ...tag,
+    library_ids: tag.library_ids.filter((id) => !movingSet.has(id)),
+  }))
+  return next.map((tag) =>
+    tag.name === target ? { ...tag, library_ids: [...tag.library_ids, ...moving] } : tag,
+  )
+}
+
+/** 批量把媒体库移出所有标签（即变为「未分类」）。 */
+export function detachLibrariesFromTag(tags: LibraryTag[], libraryIds: string[]): LibraryTag[] {
+  const moving = new Set(normalizeLibraryIds(libraryIds))
+  if (moving.size === 0) return tags
+  return tags.map((tag) => ({
+    ...tag,
+    library_ids: tag.library_ids.filter((id) => !moving.has(id)),
+  }))
+}
+
+/** 批量归类：tagName 为空表示移出所有标签。 */
+export function assignLibrariesToTag(
+  tags: LibraryTag[],
+  libraryIds: string[],
+  tagName: string,
+): LibraryTag[] {
+  return tagName ? attachLibrariesToTag(tags, libraryIds, tagName) : detachLibrariesFromTag(tags, libraryIds)
+}
+
+/** 去掉空白与重复，保留首次出现的顺序。 */
+export function normalizeLibraryIds(libraryIds: unknown): string[] {
+  if (!Array.isArray(libraryIds)) return []
+  const seen = new Set<string>()
+  const out: string[] = []
+  for (const raw of libraryIds) {
+    const trimmed = String(raw ?? '').trim()
+    if (!trimmed || seen.has(trimmed)) continue
+    seen.add(trimmed)
+    out.push(trimmed)
+  }
+  return out
+}
+
+/** 媒体库列表的模糊匹配（名称 / 路径 / 类型），供标签管理里的搜索框使用。 */
+export function filterLibrariesForTagging(libraries: Library[], keyword: string): Library[] {
+  const needle = keyword.trim().toLowerCase()
+  if (!needle) return libraries
+  return libraries.filter((lib) =>
+    `${lib.name} ${lib.path} ${lib.type}`.toLowerCase().includes(needle),
+  )
+}

web/src/utils/mediaVersion.test.ts

@@ -0,0 +1,44 @@
+import { mediaVersionLabel } from './mediaVersion.ts'
+import type { Media } from '../types/index.ts'
+
+function check(name: string, condition: boolean) {
+  if (!condition) throw new Error(`mediaVersion: ${name}`)
+}
+
+function media(partial: Partial<Media>): Media {
+  return {
+    id: 'm1',
+    title: 'SIVR-270',
+    path: '',
+    height: 0,
+    width: 0,
+    size_bytes: 0,
+    ...partial,
+  } as Media
+}
+
+const partLabel = mediaVersionLabel(media({
+  path: '/media/云下载/sivr-270/sivr-270-1.strm',
+  size_bytes: 157,
+  strm_url: '/api/strm/play/cloud115/video.mp4?pickcode=a',
+}))
+check('indistinct strm falls back to filename', partLabel.includes('sivr-270-1'))
+check('indistinct strm is not generic MP4 only', partLabel.toUpperCase() !== 'MP4')
+
+const richLabel = mediaVersionLabel(media({
+  path: '/strm/竞女01.mkv.strm',
+  height: 1080,
+  size_bytes: 1024 * 1024 * 1200,
+  strm_url: '/api/strm/play/cloud115/video.mkv?pickcode=a',
+}))
+check('rich metadata keeps resolution label', richLabel.includes('1080p'))
+check('rich metadata keeps container', richLabel.toUpperCase().includes('MKV'))
+
+const dottedPart = mediaVersionLabel(media({
+  path: '/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part2.strm',
+  size_bytes: 157,
+  strm_url: '/api/strm/play/cloud115/video.mp4?pickcode=b',
+}))
+check('part2 filename fallback keeps part token', dottedPart.includes('part2'))
+
+console.log('mediaVersion.test.ts: ok')

web/src/utils/mediaVersion.ts

@@ -107,6 +107,15 @@ function cleanFallbackFilename(raw: string): string {
   return name
 }
 
+function isIndistinctVersionLabel(parts: string[]): boolean {
+  if (parts.length === 0) return true
+  return parts.every((part) => {
+    const upper = part.toUpperCase()
+    if (upper === '云端直链' || upper === 'STRM') return true
+    return VIDEO_EXTENSIONS.has(part.toLowerCase())
+  })
+}
+
 /** 版本切换展示名：分辨率 · 容器 · 编码 · 体积 / 规格 / 来源标签。 */
 export function mediaVersionLabel(media: Media): string {
   const isStrm = isStrmMedia(media)
@@ -153,11 +162,11 @@ export function mediaVersionLabel(media: Media): string {
     parts.push('云端直链')
   }
 
-  if (parts.length > 0) {
+  // 只有容器 /「云端直链」时无法区分多分片，回退文件名（sivr-270-1 / …part1）
+  if (parts.length > 0 && !isIndistinctVersionLabel(parts)) {
     return parts.join(' · ')
   }
 
-  // 兜底：使用清理后的文件名
   const cleaned = cleanFallbackFilename(media.path || '')
   return cleaned || media.title || media.id
 }

web/src/utils/pinnedLibraries.ts

@@ -67,31 +67,3 @@ export function togglePinnedLibraryId(current: string[], id: string): string[] {
 export function isLibraryPinned(id: string, pinnedIds: string[]): boolean {
   return pinnedIds.includes(id)
 }
-
-export function sortByPinnedIds<T extends { id: string }>(items: T[], pinnedIds: string[]): T[] {
-  if (pinnedIds.length === 0) return items
-  const rank = new Map(pinnedIds.map((pinnedId, index) => [pinnedId, index]))
-  return [...items].sort((a, b) => {
-    const aRank = rank.get(a.id)
-    const bRank = rank.get(b.id)
-    const aPinned = aRank !== undefined
-    const bPinned = bRank !== undefined
-    if (aPinned !== bPinned) return aPinned ? -1 : 1
-    if (aPinned && bPinned) return aRank - bRank
-    return 0
-  })
-}
-
-export function sortLibraryPreviews<T extends { library: { id: string } }>(items: T[], pinnedIds: string[]): T[] {
-  if (pinnedIds.length === 0) return items
-  const rank = new Map(pinnedIds.map((id, index) => [id, index]))
-  return [...items].sort((a, b) => {
-    const aRank = rank.get(a.library.id)
-    const bRank = rank.get(b.library.id)
-    const aPinned = aRank !== undefined
-    const bPinned = bRank !== undefined
-    if (aPinned !== bPinned) return aPinned ? -1 : 1
-    if (aPinned && bPinned) return aRank - bRank
-    return 0
-  })
-}