优化

docs/superpowers/plans/2026-09-24-segment-coverage.md

@@ -0,0 +1,36 @@
+# Segment Coverage Implementation Plan
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** IntroDB prewarm + same-season intro propagation + shorter miss TTL + playback-only duration probe (option C).
+
+**Architecture:** Extend `MediaSegmentService` for merge/propagate/prewarm; add scheduler job `segment_prewarm`; repository queries for candidates and season siblings.
+
+**Tech Stack:** Go, GORM/SQLite, existing SchedulerService + IntroDB client.
+
+---
+
+### Task 1: Negative cache TTL + ledgerFresh tests
+
+**Files:** `internal/service/media_segment.go`, `internal/service/media_segment_test.go`
+
+- Change `segmentMissingTTL` to 24h; update tests for fresh/stale miss.
+
+### Task 2: Playback merge + propagation
+
+**Files:** `media_segment.go`, `media_segment_repository.go`, `media_repository.go`, tests
+
+- Constant `PropagatedSource = "propagated"`.
+- `ListForPlayback` merges sources with priority manual > theintrodb > propagated.
+- After successful IntroDB refresh with intro, propagate to same-season siblings (shared `tm_db_id` or `series_id`).
+
+### Task 3: Prewarm API + scheduler job
+
+**Files:** `media_segment.go`, `media_segment_repository.go`, `scheduler.go`, `scheduler_segment_jobs.go`, `service_builder.go`, tests
+
+- `Prewarm(ctx, limit)` rate-limited refreshes.
+- Job `segment_prewarm` every 6h.
+
+### Task 4: Verify
+
+- `go test` for affected packages.

docs/superpowers/specs/2026-09-24-segment-coverage-design.md

@@ -0,0 +1,52 @@
+# Segment Coverage Improvements (1–4, option C)
+
+## Goal
+
+Raise intro/outro skip availability without Chromaprint or full-library STRM probing.
+
+## Scope (approved)
+
+1. **IntroDB prewarm** — background job for all queryable media (TMDb + season/episode).
+2. **Duration** — playback-path only (no full STRM scan); keep `ListForPlayback` → `EnsureAsync`.
+3. **Same-season intro propagation** — copy intro to sibling episodes after a hit.
+4. **Negative cache** — miss TTL 24h; 403/429/timeout must not write miss ledger.
+
+## Non-goals
+
+Chromaprint, manual segment UI, library-name filters, batch STRM duration scan.
+
+## Behavior
+
+### Prewarm (`segment_prewarm`)
+
+- Scheduler job, interval 6h, initial delay 6h (avoid restart spike).
+- **Opt-in via `segment.prewarm_enabled` (default off)** — system settings toggle「后台预热 IntroDB 片头片段」.
+- Candidates: `tm_db_id > 0`, season/episode or movie, ledger missing or stale.
+- Order: recently played first, then others.
+- Rate: ~1 req/s, stop on context cancel; respect IntroDB 429 retry already in client.
+- Reuse `MediaSegmentService` refresh + propagation.
+- Manual `RunNow` can bypass the toggle (same pattern as organize).
+
+### Propagation
+
+- After TheIntroDB refresh finds at least one `intro` span, write the same intro window to same-season siblings that lack a `theintrodb` intro.
+- Source tag: `propagated`.
+- Do not propagate credits/preview/recap.
+- Playback merge priority per kind: `manual` > `theintrodb` > `propagated`.
+
+### Negative cache
+
+- `segmentMissingTTL`: 24h (was 7d).
+- `segmentFoundTTL`: 30d (unchanged).
+- Provider errors (non-404) continue to skip ledger writes.
+
+### Duration (C)
+
+- No new batch probe job.
+- Existing `defer ensureMediaProbe` on playback remains the only STRM duration path.
+
+## Success criteria
+
+- Prewarm increases `media_segment_fetches` over time without blocking play.
+- One IntroDB intro hit can surface skip on sibling episodes via `propagated`.
+- Misses are retried within ~24h (sooner if recently played and prewarm runs).

internal/handler/danmaku_settings_test.go

@@ -112,8 +112,7 @@ func TestGetDanmakuConfigIncludesPerUserMergePreference(t *testing.T) {
 		t.Fatalf("status = %d, want 200", w.Code)
 	}
 	var cfg struct {
-		MergeSources bool    `json:"merge_sources"`
-		PlaybackRate float64 `json:"playback_rate"`
+		MergeSources bool `json:"merge_sources"`
 	}
 	if err := json.Unmarshal(w.Body.Bytes(), &cfg); err != nil {
 		t.Fatalf("decode: %v", err)
@@ -121,9 +120,6 @@ func TestGetDanmakuConfigIncludesPerUserMergePreference(t *testing.T) {
 	if cfg.MergeSources {
 		t.Fatal("default merge preference should be false")
 	}
-	if cfg.PlaybackRate != 1 {
-		t.Fatalf("default playback rate = %v, want 1", cfg.PlaybackRate)
-	}
 
 	if err := svc.Danmaku.SetMergeSources(t.Context(), "user-1", true); err != nil {
 		t.Fatalf("set: %v", err)
@@ -141,7 +137,7 @@ func TestGetDanmakuConfigIncludesPerUserMergePreference(t *testing.T) {
 func TestUpdateDanmakuSettingsPersistsAllPlayerPreferences(t *testing.T) {
 	svc := newDanmakuSettingsService(t)
 
-	body := "{\"enabled\":false,\"opacity\":0.6,\"font_size\":32,\"area\":0.7,\"merge_sources\":true,\"volume\":0.35,\"playback_rate\":1.5,\"source\":\"https://dm.example/base/\",\"app_id\":\"my-app-id\",\"app_key\":\"my-app-secret\"}"
+	body := "{\"enabled\":false,\"opacity\":0.6,\"font_size\":32,\"area\":0.7,\"merge_sources\":true,\"volume\":0.35,\"source\":\"https://dm.example/base/\",\"app_id\":\"my-app-id\",\"app_key\":\"my-app-secret\"}"
 	c, w := newDanmakuSettingsContext(t, svc, http.MethodPut, "/danmaku/settings", body, "user-1")
 	updateDanmakuSettingsHandler(svc)(c)
 
@@ -158,7 +154,7 @@ func TestUpdateDanmakuSettingsPersistsAllPlayerPreferences(t *testing.T) {
 	if cfg.Enabled || cfg.Opacity != "0.6" || cfg.FontSize != "32" || cfg.Area != "0.7" {
 		t.Fatalf("unexpected render config: %+v", cfg)
 	}
-	if !cfg.MergeSources || cfg.Volume != 0.35 || cfg.PlaybackRate != 1.5 {
+	if !cfg.MergeSources || cfg.Volume != 0.35 {
 		t.Fatalf("unexpected user preferences: %+v", cfg)
 	}
 	if cfg.Source != "https://dm.example/base" || cfg.AppID != "my-app-id" || !cfg.AppKeyConfigured {
@@ -169,7 +165,7 @@ func TestUpdateDanmakuSettingsPersistsAllPlayerPreferences(t *testing.T) {
 	if err != nil || user == nil {
 		t.Fatalf("read persisted user: %v", err)
 	}
-	if user.DanmakuAppKey != "my-app-secret" || user.PlayerVolume != 0.35 || user.PlayerPlaybackRate != 1.5 || user.DanmakuSource != "https://dm.example/base" {
+	if user.DanmakuAppKey != "my-app-secret" || user.PlayerVolume != 0.35 || user.DanmakuSource != "https://dm.example/base" {
 		t.Fatalf("preferences not persisted: %+v", user)
 	}
 }
@@ -207,22 +203,36 @@ func TestUpdateDanmakuSettingsPersistsVr360GuideSeen(t *testing.T) {
 	}
 }
 
-func TestUpdateDanmakuSettingsRejectsInvalidPlaybackRate(t *testing.T) {
+// 播放倍速只作用于当前视频：接口既不下发也不保存它。老客户端仍可能带上
+// playback_rate，服务端应当忽略而不是报错。
+func TestDanmakuSettingsIgnorePlaybackRate(t *testing.T) {
 	svc := newDanmakuSettingsService(t)
 
-	c, w := newDanmakuSettingsContext(t, svc, http.MethodPut, "/danmaku/settings",
-		`{"playback_rate":4}`, "user-1")
-	updateDanmakuSettingsHandler(svc)(c)
+	c, w := newDanmakuSettingsContext(t, svc, http.MethodGet, "/danmaku/config", "", "user-1")
+	getDanmakuConfigHandler(svc)(c)
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200 (body=%s)", w.Code, w.Body.String())
+	}
+	if bytes.Contains(w.Body.Bytes(), []byte("playback_rate")) {
+		t.Fatalf("config must not expose playback rate: %s", w.Body.String())
+	}
 
-	if w.Code != http.StatusBadRequest {
-		t.Fatalf("status = %d, want 400 (body=%s)", w.Code, w.Body.String())
+	c2, w2 := newDanmakuSettingsContext(t, svc, http.MethodPut, "/danmaku/settings",
+		`{"volume":0.5,"playback_rate":1.5}`, "user-1")
+	updateDanmakuSettingsHandler(svc)(c2)
+
+	if w2.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200 (body=%s)", w2.Code, w2.Body.String())
+	}
+	if bytes.Contains(w2.Body.Bytes(), []byte("playback_rate")) {
+		t.Fatalf("settings response must not expose playback rate: %s", w2.Body.String())
 	}
 	user, err := svc.Repo.User.FindByID(t.Context(), "user-1")
 	if err != nil || user == nil {
 		t.Fatalf("read user: %v", err)
 	}
-	if user.PlayerPlaybackRate != 1 {
-		t.Fatalf("invalid playback rate was persisted: %v", user.PlayerPlaybackRate)
+	if user.PlayerVolume != 0.5 {
+		t.Fatalf("volume not persisted: %v", user.PlayerVolume)
 	}
 }
 

internal/handler/emby_discovery.go

@@ -24,7 +24,42 @@ func embyNextUpHandler(svc *service.Container) gin.HandlerFunc {
 			return
 		}
 		limit, _ := strconv.Atoi(embyFirstNonEmptyString(firstQueryValue(c, "Limit", "limit"), ""))
-		out, err := svc.Emby.NextUp(c.Request.Context(), userID, limit)
+		// YamBy / Emby 进剧集详情会带 SeriesId 请求「本剧下一集」。
+		// 忽略该参数会把全站 NextUp 第一条塞进详情页「继续播放」。
+		// 注意：不要把普通 ParentId（媒体库）当成 SeriesId，否则首页 NextUp 会被滤空。
+		seriesID := firstQueryValue(c, "SeriesId", "seriesId", "seriesid")
+		if seriesID == "" {
+			if parentID := firstQueryValue(c, "ParentId", "parentId", "parentid"); parentID != "" {
+				if strings.HasPrefix(parentID, "msgo-series-") || service.IsEmbyRemoteID(parentID) {
+					seriesID = parentID
+				}
+			}
+		}
+		out, err := svc.Emby.NextUp(c.Request.Context(), userID, seriesID, limit)
+		if err != nil {
+			c.JSON(http.StatusOK, embyEmptyItemsPayload())
+			return
+		}
+		embyAttachRequestTokenToMediaSources(c, out)
+		c.JSON(http.StatusOK, out)
+	}
+}
+
+// embyShowNextUpHandler 处理 /Shows/{id}/NextUp：把路径上的剧集 ID 当作 SeriesId。
+func embyShowNextUpHandler(svc *service.Container) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		userID := embyScopedUserID(c)
+		if userID == "" {
+			c.JSON(http.StatusOK, embyEmptyItemsPayload())
+			return
+		}
+		seriesID := strings.TrimSpace(c.Param("id"))
+		if seriesID == "" || strings.EqualFold(seriesID, "NextUp") {
+			c.JSON(http.StatusOK, embyEmptyItemsPayload())
+			return
+		}
+		limit, _ := strconv.Atoi(embyFirstNonEmptyString(firstQueryValue(c, "Limit", "limit"), ""))
+		out, err := svc.Emby.NextUp(c.Request.Context(), userID, seriesID, limit)
 		if err != nil {
 			c.JSON(http.StatusOK, embyEmptyItemsPayload())
 			return

internal/handler/emby_discovery_test.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
+	"strconv"
 	"testing"
 	"time"
 
@@ -104,8 +105,8 @@ func TestEmbyNextUpReturnsNextEpisode(t *testing.T) {
 		}
 		if watched {
 			h := &model.PlaybackHistory{
-				UserID: userID, MediaID: m.ID, PositionMs: 1000, DurationMs: 2000,
-				WatchedAt: watchedAt, Completed: false,
+				UserID: userID, MediaID: m.ID, PositionMs: 2000, DurationMs: 2000,
+				WatchedAt: watchedAt, Completed: true, // 第 1 集已看完
 			}
 			if err := svc.Repo.DB.Create(h).Error; err != nil {
 				t.Fatal(err)
@@ -126,6 +127,49 @@ func TestEmbyNextUpReturnsNextEpisode(t *testing.T) {
 	}
 }
 
+// 回归：用户在剧集详情页点播放、只看了几秒就退出（历史行 completed=false）后，
+// Yamby 再次进入详情页带的 NextUp 仍要指向那一集本身，否则「继续播放」会跳到下一集。
+func TestEmbyNextUpKeepsPartiallyWatchedEpisode(t *testing.T) {
+	router, svc, userID := newEmbyDiscoveryEnv(t)
+	libID := seedEmbyLibrary(t, svc, "tv")
+
+	episodeIDs := map[int]string{}
+	for ep := 1; ep <= 3; ep++ {
+		m := &model.Media{
+			LibraryID: libID, SeriesID: "series-1", Title: "剧一",
+			SeasonNum: 1, EpisodeNum: ep,
+			Path: "/media/tv/S1E" + strconv.Itoa(ep) + ".mkv",
+		}
+		if err := svc.Repo.DB.Create(m).Error; err != nil {
+			t.Fatal(err)
+		}
+		episodeIDs[ep] = m.ID
+	}
+
+	// 第 2 集播放了 3 秒后退出：有进度、未标记看完。
+	if err := svc.Repo.DB.Create(&model.PlaybackHistory{
+		UserID: userID, MediaID: episodeIDs[2], PositionMs: 3582, DurationMs: 1440064,
+		WatchedAt: time.Now(), Completed: false,
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	w := embyGet(t, router, "/emby/Shows/NextUp?SeriesId=series-1&Limit=1", signedTestToken(t, "test-secret"))
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d body=%s", w.Code, w.Body.String())
+	}
+	items := decodeItemsEnvelope(t, w.Body.Bytes())
+	if len(items) != 1 {
+		t.Fatalf("items = %d, want 1 (body=%s)", len(items), w.Body.String())
+	}
+	if id, _ := items[0]["Id"].(string); id != episodeIDs[2] {
+		t.Fatalf("Id = %q, want the partially watched episode %q (body=%s)", id, episodeIDs[2], w.Body.String())
+	}
+	if index, ok := items[0]["IndexNumber"].(float64); !ok || int(index) != 2 {
+		t.Fatalf("IndexNumber = %v, want 2 (body=%s)", items[0]["IndexNumber"], w.Body.String())
+	}
+}
+
 // 没有历史时必须返回合法空信封，不能 404/500。
 func TestEmbyNextUpEmptyWithoutHistory(t *testing.T) {
 	router, _, _ := newEmbyDiscoveryEnv(t)
@@ -242,3 +286,87 @@ func TestEmbyNextUpRejectsForeignUserID(t *testing.T) {
 		t.Fatalf("items = %d, want 0", len(items))
 	}
 }
+
+// YamBy 等客户端进入剧集详情会带 SeriesId 调 NextUp；必须只返回该剧的下一集，
+// 不能回落成全站「继续观看」第一条，否则详情页播放会串到别的片子。
+func TestEmbyNextUpFiltersBySeriesID(t *testing.T) {
+	router, svc, userID := newEmbyDiscoveryEnv(t)
+	libID := seedEmbyLibrary(t, svc, "tv")
+	recent := time.Now().Add(-time.Minute)
+	older := time.Now().Add(-2 * time.Hour)
+
+	seedSeries := func(seriesID, title string, watchedAt time.Time) (watchedID, nextID string) {
+		t.Helper()
+		for ep := 1; ep <= 3; ep++ {
+			m := &model.Media{
+				LibraryID: libID, SeriesID: seriesID, Title: title,
+				SeasonNum: 1, EpisodeNum: ep,
+				Path: "/media/tv/" + seriesID + "/S1E" + strconv.Itoa(ep) + ".mkv",
+			}
+			if err := svc.Repo.DB.Create(m).Error; err != nil {
+				t.Fatal(err)
+			}
+			switch ep {
+			case 1:
+				watchedID = m.ID
+				h := &model.PlaybackHistory{
+					UserID: userID, MediaID: m.ID, PositionMs: 2000, DurationMs: 2000,
+					WatchedAt: watchedAt, Completed: true, // 第 1 集已看完，下一集是 S1E2
+				}
+				if err := svc.Repo.DB.Create(h).Error; err != nil {
+					t.Fatal(err)
+				}
+			case 2:
+				nextID = m.ID
+			}
+		}
+		return watchedID, nextID
+	}
+
+	_, _ = seedSeries("series-hot", "热门剧", recent)
+	_, wantNext := seedSeries("series-cold", "目标剧", older)
+
+	token := signedTestToken(t, "test-secret")
+	global := embyGet(t, router, "/emby/Shows/NextUp?Limit=10", token)
+	if global.Code != http.StatusOK {
+		t.Fatalf("global status = %d body=%s", global.Code, global.Body.String())
+	}
+	if items := decodeItemsEnvelope(t, global.Body.Bytes()); len(items) < 2 {
+		t.Fatalf("global items = %d, want >= 2 (body=%s)", len(items), global.Body.String())
+	}
+
+	scoped := embyGet(t, router, "/emby/Shows/NextUp?SeriesId=series-cold&Limit=10", token)
+	if scoped.Code != http.StatusOK {
+		t.Fatalf("scoped status = %d body=%s", scoped.Code, scoped.Body.String())
+	}
+	items := decodeItemsEnvelope(t, scoped.Body.Bytes())
+	if len(items) != 1 {
+		t.Fatalf("scoped items = %d, want 1 (body=%s)", len(items), scoped.Body.String())
+	}
+	if id, _ := items[0]["Id"].(string); id != wantNext {
+		t.Fatalf("scoped Id = %q, want %q (body=%s)", id, wantNext, scoped.Body.String())
+	}
+	if seriesID, _ := items[0]["SeriesId"].(string); seriesID != "series-cold" {
+		t.Fatalf("scoped SeriesId = %q, want series-cold", seriesID)
+	}
+
+	empty := embyGet(t, router, "/emby/Shows/NextUp?SeriesId=series-never-watched", token)
+	if empty.Code != http.StatusOK {
+		t.Fatalf("empty status = %d body=%s", empty.Code, empty.Body.String())
+	}
+	if items := decodeItemsEnvelope(t, empty.Body.Bytes()); len(items) != 0 {
+		t.Fatalf("never-watched items = %d, want 0 (body=%s)", len(items), empty.Body.String())
+	}
+
+	pathScoped := embyGet(t, router, "/emby/Shows/series-cold/NextUp?Limit=10", token)
+	if pathScoped.Code != http.StatusOK {
+		t.Fatalf("path scoped status = %d body=%s", pathScoped.Code, pathScoped.Body.String())
+	}
+	pathItems := decodeItemsEnvelope(t, pathScoped.Body.Bytes())
+	if len(pathItems) != 1 {
+		t.Fatalf("path scoped items = %d, want 1 (body=%s)", len(pathItems), pathScoped.Body.String())
+	}
+	if id, _ := pathItems[0]["Id"].(string); id != wantNext {
+		t.Fatalf("path scoped Id = %q, want %q", id, wantNext)
+	}
+}

internal/handler/emby_items_handlers.go

@@ -132,7 +132,10 @@ func embyResumeItemsHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		uid := embyEffectiveUserID(c)
 		limit, _ := strconv.Atoi(embyFirstNonEmptyString(firstQueryValue(c, "Limit", "limit"), "20"))
-		out, err := svc.Emby.ResumeItems(c.Request.Context(), uid, limit)
+		startIndex, _ := strconv.Atoi(embyFirstNonEmptyString(firstQueryValue(c, "StartIndex", "startIndex", "startindex"), "0"))
+		// ParentId / SeriesId 收窄到当前库或当前剧，避免详情页继续播放串到全站历史。
+		parentID := firstQueryValue(c, "ParentId", "parentId", "parentid", "SeriesId", "seriesId", "seriesid")
+		out, err := svc.Emby.ResumeItems(c.Request.Context(), uid, parentID, limit, startIndex)
 		if err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 			return

internal/handler/emby_routes.go

@@ -198,6 +198,9 @@ func registerEmbyAuthenticatedItemRoutes(auth *gin.RouterGroup, svc *service.Con
 	auth.GET("/Users/:userId/Shows/:id/Episodes", embyShowEpisodesHandler(svc))
 	auth.GET("/Shows/NextUp", embyNextUpHandler(svc))
 	auth.GET("/Users/:userId/Shows/NextUp", embyNextUpHandler(svc))
+	// 部分客户端用路径形式 /Shows/{seriesId}/NextUp，而不是 query SeriesId。
+	auth.GET("/Shows/:id/NextUp", embyShowNextUpHandler(svc))
+	auth.GET("/Users/:userId/Shows/:id/NextUp", embyShowNextUpHandler(svc))
 	auth.GET("/MediaSegments/:id", embyMediaSegmentsHandler(svc))
 	auth.GET("/Items/:id/MediaSegments", embyMediaSegmentsHandler(svc))
 	auth.GET("/Users/:userId/Items/:id/MediaSegments", embyMediaSegmentsHandler(svc))

internal/handler/emby_routes_lowercase.go

@@ -42,6 +42,8 @@ func registerLowercaseEmbyItemRoutes(auth *gin.RouterGroup, svc *service.Contain
 	auth.GET("/users/:userId/shows/:id/episodes", embyShowEpisodesHandler(svc))
 	auth.GET("/shows/nextup", embyNextUpHandler(svc))
 	auth.GET("/users/:userId/shows/nextup", embyNextUpHandler(svc))
+	auth.GET("/shows/:id/nextup", embyShowNextUpHandler(svc))
+	auth.GET("/users/:userId/shows/:id/nextup", embyShowNextUpHandler(svc))
 	auth.GET("/mediasegments/:id", embyMediaSegmentsHandler(svc))
 	auth.GET("/items/:id/mediasegments", embyMediaSegmentsHandler(svc))
 	auth.GET("/users/:userId/items/:id/mediasegments", embyMediaSegmentsHandler(svc))

internal/handler/playback_segments.go

@@ -22,9 +22,7 @@ import (
 func playbackSegmentsHandler(svc *service.Container) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		autoSkip := resolveAutoSkipFlag(c, svc)
-		source := resolveSegmentSource(c, svc)
 		segments := []service.SegmentView{}
-		pending := false
 
 		m, err := findMediaForPlaybackEndpoint(c, svc, c.Param("id"))
 		if err != nil || m == nil || !mediaVisibleForRequest(c, svc, m) {
@@ -33,22 +31,14 @@ func playbackSegmentsHandler(svc *service.Container) gin.HandlerFunc {
 		}
 		// 远程 Emby 挂载的条目是上游库的投影，本地没有可查询的外部 ID 关联。
 		if svc.Segments != nil && !service.IsEmbyRemoteID(m.ID) {
-			result, listErr := svc.Segments.SegmentsForPlayback(c.Request.Context(), m, source)
+			rows, listErr := svc.Segments.ListForPlayback(c.Request.Context(), m)
 			if listErr != nil && svc.Log != nil {
 				svc.Log.Debug("list media segments failed",
 					zap.String("media_id", m.ID), zap.Error(listErr))
 			}
-			segments = service.ToSegmentViews(result.Segments)
-			pending = result.Pending
+			segments = service.ToSegmentViews(rows)
 		}
-		// pending 告诉客户端「章节提取还在后台跑，过几秒再拉一次」；提取完成时
-		// 如果片头还没播完，跳过按钮就会自己出现，已经过了片头则不会提示。
-		c.JSON(http.StatusOK, gin.H{
-			"segments":  segments,
-			"auto_skip": autoSkip,
-			"pending":   pending,
-			"source":    source,
-		})
+		c.JSON(http.StatusOK, gin.H{"segments": segments, "auto_skip": autoSkip})
 	}
 }
 
@@ -63,13 +53,3 @@ func resolveAutoSkipFlag(c *gin.Context, svc *service.Container) bool {
 	}
 	return profile.SkipIntro
 }
-
-// resolveSegmentSource reads the「片头片尾数据来源」choice off the active profile.
-// PIN-locked profiles fall back to auto rather than leaking the profile's setting.
-func resolveSegmentSource(c *gin.Context, svc *service.Container) string {
-	profile, locked := selectedPlayProfile(c, svc)
-	if locked || profile == nil {
-		return service.SegmentSourceAuto
-	}
-	return service.NormalizeSegmentSource(profile.SegmentSource)
-}

internal/model/playback_collection.go

@@ -53,21 +53,18 @@ type PlaylistItem struct {
 // AllowedLibraryIDs is a JSON array of library UUIDs (empty = all).
 type PlayProfile struct {
 	Base
-	UserID                string `gorm:"index;size:36;not null" json:"user_id"`
-	Name                  string `gorm:"size:64;not null" json:"name"`
-	IsDefault             bool   `gorm:"default:false" json:"is_default"`
-	ContentRatingLimit    string `gorm:"size:16" json:"content_rating_limit,omitempty"`
-	AllowAdult            bool   `gorm:"default:false" json:"allow_adult"`
-	RequirePIN            bool   `gorm:"default:false" json:"require_pin"`
-	PINHash               string `gorm:"size:128" json:"-"`
-	PreferredSubtitleLang string `gorm:"size:16" json:"preferred_subtitle_lang,omitempty"`
-	PreferredAudioLang    string `gorm:"size:16" json:"preferred_audio_lang,omitempty"`
-	AutoplayNext          bool   `gorm:"default:true" json:"autoplay_next"`
-	SkipIntro             bool   `gorm:"default:false" json:"skip_intro"`
-	// SegmentSource 决定片头/片尾数据从哪来：auto（优先文件内嵌章节，没有可用
-	// 章节时回落到 TheIntroDB）/ theintrodb / ffprobe。空值按 auto 处理。
-	SegmentSource     string     `gorm:"size:16;default:'auto'" json:"segment_source,omitempty"`
-	AllowedLibraryIDs string     `gorm:"type:text;default:'[]'" json:"allowed_library_ids"`
-	TotalWatchTime    int64      `gorm:"default:0" json:"total_watch_time"`
-	LastActiveAt      *time.Time `json:"last_active_at,omitempty"`
+	UserID                string     `gorm:"index;size:36;not null" json:"user_id"`
+	Name                  string     `gorm:"size:64;not null" json:"name"`
+	IsDefault             bool       `gorm:"default:false" json:"is_default"`
+	ContentRatingLimit    string     `gorm:"size:16" json:"content_rating_limit,omitempty"`
+	AllowAdult            bool       `gorm:"default:false" json:"allow_adult"`
+	RequirePIN            bool       `gorm:"default:false" json:"require_pin"`
+	PINHash               string     `gorm:"size:128" json:"-"`
+	PreferredSubtitleLang string     `gorm:"size:16" json:"preferred_subtitle_lang,omitempty"`
+	PreferredAudioLang    string     `gorm:"size:16" json:"preferred_audio_lang,omitempty"`
+	AutoplayNext          bool       `gorm:"default:true" json:"autoplay_next"`
+	SkipIntro             bool       `gorm:"default:false" json:"skip_intro"`
+	AllowedLibraryIDs     string     `gorm:"type:text;default:'[]'" json:"allowed_library_ids"`
+	TotalWatchTime        int64      `gorm:"default:0" json:"total_watch_time"`
+	LastActiveAt          *time.Time `json:"last_active_at,omitempty"`
 }

internal/model/user.go

@@ -37,8 +37,8 @@ type User struct {
 	// original / simplified / traditional。
 	SubtitleChineseMode string `gorm:"size:16;not null;default:original" json:"subtitle_chinese_mode"`
 	// 网页播放器偏好按用户存储，切换媒体对象后继续沿用。
-	PlayerVolume       float64 `gorm:"not null;default:1" json:"player_volume"`
-	PlayerPlaybackRate float64 `gorm:"not null;default:1" json:"player_playback_rate"`
+	// 播放倍速不在此列：它只作用于当前视频，不进数据库。
+	PlayerVolume float64 `gorm:"not null;default:1" json:"player_volume"`
 	// PlayerVr360GuideSeen 记录用户是否已经看过 VR 全景播放的首次操作说明，
 	// 按用户保存：看过一次之后不再弹出。
 	PlayerVr360GuideSeen bool    `gorm:"not null;default:false" json:"player_vr360_guide_seen"`

internal/repository/media_repository.go

@@ -232,6 +232,31 @@ func (r *MediaRepository) ExistsSiblingWithTMDbID(ctx context.Context, m *model.
 	return count > 0
 }
 
+// ListSeasonSiblings returns other episodes in the same season as m.
+// Prefers series_id; falls back to shared library+title+tm_db_id (anime scrape path).
+func (r *MediaRepository) ListSeasonSiblings(ctx context.Context, m *model.Media) ([]model.Media, error) {
+	if r == nil || m == nil || m.SeasonNum <= 0 || m.ID == "" {
+		return nil, nil
+	}
+	query := r.db.WithContext(ctx).Model(&model.Media{}).
+		Where("season_num = ? AND id <> ?", m.SeasonNum, m.ID)
+	if seriesID := strings.TrimSpace(m.SeriesID); seriesID != "" {
+		query = query.Where("series_id = ?", seriesID)
+	} else {
+		libraryID := strings.TrimSpace(m.LibraryID)
+		title := strings.TrimSpace(m.Title)
+		if libraryID == "" || title == "" || m.TMDbID <= 0 {
+			return nil, nil
+		}
+		query = query.Where("library_id = ? AND title = ? AND tm_db_id = ?", libraryID, title, m.TMDbID)
+	}
+	var rows []model.Media
+	if err := query.Find(&rows).Error; err != nil {
+		return nil, err
+	}
+	return rows, nil
+}
+
 // ListByLibrary returns paginated media items for a library.
 func (r *MediaRepository) ListByLibrary(ctx context.Context, libraryID string, offset, limit int) ([]model.Media, int64, error) {
 	return r.ListByLibraryFiltered(ctx, libraryID, offset, limit, MediaQueryFilter{IncludeNSFW: true})

internal/repository/media_segment_repository.go

@@ -3,6 +3,7 @@ package repository
 import (
 	"context"
 	"errors"
+	"time"
 
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
@@ -84,3 +85,45 @@ func (r *MediaSegmentRepository) UpsertFetch(ctx context.Context, row *model.Med
 	}
 	return r.db.WithContext(ctx).Clauses(onConflict).Create(row).Error
 }
+
+// ListPrewarmCandidates returns media that should be refreshed from source:
+// no ledger, expired miss (fetched_at < missBefore), or expired hit (fetched_at < hitBefore).
+// Recently played items come first so hot titles recover coverage sooner.
+func (r *MediaSegmentRepository) ListPrewarmCandidates(
+	ctx context.Context,
+	source string,
+	missBefore, hitBefore time.Time,
+	limit int,
+) ([]model.Media, error) {
+	if r == nil || limit <= 0 {
+		return nil, nil
+	}
+	rows := make([]model.Media, 0, limit)
+	// 可查询：有 TMDb，且是剧集（有季集）或电影（无季集）。
+	err := r.db.WithContext(ctx).Raw(`
+SELECT m.*
+FROM media m
+LEFT JOIN media_segment_fetches f
+  ON f.media_id = m.id AND f.source = ? AND f.deleted_at IS NULL
+LEFT JOIN (
+  SELECT media_id, MAX(updated_at) AS last_played
+  FROM playback_histories
+  WHERE deleted_at IS NULL
+  GROUP BY media_id
+) ph ON ph.media_id = m.id
+WHERE m.deleted_at IS NULL
+  AND m.tm_db_id > 0
+  AND (
+    (m.season_num > 0 AND m.episode_num > 0)
+    OR (COALESCE(m.season_num, 0) = 0 AND COALESCE(m.episode_num, 0) = 0)
+  )
+  AND (
+    f.id IS NULL
+    OR (f.found = 0 AND f.fetched_at < ?)
+    OR (f.found = 1 AND f.fetched_at < ?)
+  )
+ORDER BY ph.last_played DESC
+LIMIT ?
+`, source, missBefore, hitBefore, limit).Scan(&rows).Error
+	return rows, err
+}

internal/repository/media_segment_repository_test.go

@@ -152,3 +152,56 @@ func TestUpsertFetchKeepsOneRowPerMediaAndSource(t *testing.T) {
 		t.Fatalf("ledger should be updated in place, got %#v", got)
 	}
 }
+
+func TestListSeasonSiblingsSharesLibraryTitleTMDb(t *testing.T) {
+	repos := newSegmentTestRepos(t)
+	ctx := t.Context()
+	eps := []*model.Media{
+		{Base: model.Base{ID: "a"}, LibraryID: "lib", Title: "Show", Path: "/a", SeasonNum: 1, EpisodeNum: 1, TMDbID: 99},
+		{Base: model.Base{ID: "b"}, LibraryID: "lib", Title: "Show", Path: "/b", SeasonNum: 1, EpisodeNum: 2, TMDbID: 99},
+		{Base: model.Base{ID: "c"}, LibraryID: "lib", Title: "Show", Path: "/c", SeasonNum: 2, EpisodeNum: 1, TMDbID: 99},
+	}
+	for _, ep := range eps {
+		if err := repos.DB.Create(ep).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+	got, err := repos.Media.ListSeasonSiblings(ctx, eps[0])
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(got) != 1 || got[0].ID != "b" {
+		t.Fatalf("siblings = %#v, want only same-season ep b", got)
+	}
+}
+
+func TestListPrewarmCandidatesOrdersRecentPlaysFirst(t *testing.T) {
+	repos := newSegmentTestRepos(t)
+	ctx := t.Context()
+	now := time.Now()
+	for _, m := range []*model.Media{
+		{Base: model.Base{ID: "cold"}, Path: "/cold", TMDbID: 1},
+		{Base: model.Base{ID: "hot"}, Path: "/hot", TMDbID: 2},
+	} {
+		if err := repos.DB.Create(m).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := repos.DB.Create(&model.PlaybackHistory{
+		Base: model.Base{ID: "ph1"}, UserID: "u", MediaID: "hot",
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+	got, err := repos.MediaSegment.ListPrewarmCandidates(
+		ctx, "theintrodb", now.Add(-time.Hour), now.Add(-time.Hour), 10,
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(got) < 2 {
+		t.Fatalf("candidates = %#v, want both", got)
+	}
+	if got[0].ID != "hot" {
+		t.Fatalf("first = %s, want hot (recently played)", got[0].ID)
+	}
+}

internal/service/danmaku_service.go

@@ -49,12 +49,6 @@ const (
 // dandanplay protocol (search/episodes + comment/{episodeId}) may be used.
 const DanmakuDefaultSource = "https://api.dandanplay.net"
 
-const (
-	minPlayerPlaybackRate     = 0.5
-	maxPlayerPlaybackRate     = 3.0
-	defaultPlayerPlaybackRate = 1.0
-)
-
 // danmakuOfficialBase is where identification (/api/v2/match) and the
 // comment/search fallback always go, regardless of the configured source.
 // A package var (not a const) so tests can point it at a local server.
@@ -69,8 +63,6 @@ type DanmakuRenderConfig struct {
 	FontSize string  `json:"font_size"`
 	Area     string  `json:"area"`
 	Volume   float64 `json:"volume"`
-	// PlaybackRate 是当前用户的播放倍速偏好（按用户存储）。
-	PlaybackRate float64 `json:"playback_rate"`
 	// Vr360GuideSeen 表示当前用户是否已经看过 VR 全景播放的首次操作说明。
 	Vr360GuideSeen bool `json:"vr360_guide_seen"`
 	// MergeSources 是当前用户的弹幕合并偏好（按用户存储）。
@@ -99,7 +91,6 @@ type DanmakuSettingsPatch struct {
 	Area         *float64 `json:"area"`
 	MergeSources *bool    `json:"merge_sources"`
 	Volume       *float64 `json:"volume"`
-	PlaybackRate *float64 `json:"playback_rate"`
 	// Vr360GuideSeen 标记 VR 全景播放的首次操作说明是否已经看过。
 	Vr360GuideSeen *bool `json:"vr360_guide_seen"`
 }
@@ -358,11 +349,10 @@ func cloneDanmakuAnimeList(in []DanmakuAnime) []DanmakuAnime {
 // Config reads danmaku settings from the runtime settings table.
 func (s *DanmakuService) Config(ctx context.Context) DanmakuRenderConfig {
 	cfg := DanmakuRenderConfig{
-		Opacity:      "1",
-		FontSize:     "24",
-		Area:         "1",
-		Volume:       1,
-		PlaybackRate: defaultPlayerPlaybackRate,
+		Opacity:  "1",
+		FontSize: "24",
+		Area:     "1",
+		Volume:   1,
 	}
 	if s == nil || s.repo == nil || s.repo.Setting == nil {
 		return cfg
@@ -414,12 +404,11 @@ func (s *DanmakuService) findUser(ctx context.Context, userID string) (*model.Us
 func danmakuConfigFromUser(user *model.User) DanmakuRenderConfig {
 	if user == nil {
 		return DanmakuRenderConfig{
-			Enabled:      true,
-			Opacity:      "1",
-			FontSize:     "24",
-			Area:         "1",
-			Volume:       1,
-			PlaybackRate: defaultPlayerPlaybackRate,
+			Enabled:  true,
+			Opacity:  "1",
+			FontSize: "24",
+			Area:     "1",
+			Volume:   1,
 		}
 	}
 	opacity := user.DanmakuOpacity
@@ -438,10 +427,6 @@ func danmakuConfigFromUser(user *model.User) DanmakuRenderConfig {
 	if volume < 0 || volume > 1 {
 		volume = 1
 	}
-	playbackRate := user.PlayerPlaybackRate
-	if playbackRate < minPlayerPlaybackRate || playbackRate > maxPlayerPlaybackRate {
-		playbackRate = defaultPlayerPlaybackRate
-	}
 	return DanmakuRenderConfig{
 		Enabled:          user.DanmakuEnabled,
 		Source:           strings.TrimSpace(user.DanmakuSource),
@@ -450,7 +435,6 @@ func danmakuConfigFromUser(user *model.User) DanmakuRenderConfig {
 		FontSize:         strconv.Itoa(fontSize),
 		Area:             strconv.FormatFloat(area, 'f', -1, 64),
 		Volume:           volume,
-		PlaybackRate:     playbackRate,
 		Vr360GuideSeen:   user.PlayerVr360GuideSeen,
 		MergeSources:     user.DanmakuMergeSources,
 		AppKeyConfigured: strings.TrimSpace(user.DanmakuAppKey) != "",
@@ -522,17 +506,6 @@ func (s *DanmakuService) UpdateUserSettings(ctx context.Context, userID string,
 		}
 		updates["player_volume"] = *patch.Volume
 	}
-	if patch.PlaybackRate != nil {
-		if *patch.PlaybackRate < minPlayerPlaybackRate || *patch.PlaybackRate > maxPlayerPlaybackRate {
-			return DanmakuRenderConfig{}, fmt.Errorf(
-				"%w: playback_rate must be between %.2f and %.2f",
-				ErrInvalidDanmakuSettings,
-				minPlayerPlaybackRate,
-				maxPlayerPlaybackRate,
-			)
-		}
-		updates["player_playback_rate"] = *patch.PlaybackRate
-	}
 	if patch.Vr360GuideSeen != nil {
 		updates["player_vr360_guide_seen"] = *patch.Vr360GuideSeen
 	}

internal/service/danmaku_service_test.go

@@ -422,7 +422,6 @@ func TestDanmakuFetchUsesPerUserSourceAndCredentials(t *testing.T) {
 	user.DanmakuFontSize = 30
 	user.DanmakuArea = 0.7
 	user.PlayerVolume = 0.42
-	user.PlayerPlaybackRate = 1.25
 	require.NoError(t, svc.repo.User.Create(ctx, &user))
 	seedDanmakuMedia(t, svc, "per-user-media", "测试动画", "", 0)
 
@@ -431,7 +430,6 @@ func TestDanmakuFetchUsesPerUserSourceAndCredentials(t *testing.T) {
 	require.Contains(t, res.Raw, "弹幕A")
 	require.Equal(t, srv.URL(), res.Source)
 	require.Equal(t, 0.42, res.Volume)
-	require.Equal(t, 1.25, res.PlaybackRate)
 	require.Equal(t, "0.65", res.Opacity)
 	require.Equal(t, "30", res.FontSize)
 	require.Equal(t, srv.lastHeaders.Get("X-AppId"), "user-app-id")

internal/service/emby_discovery.go

@@ -6,6 +6,8 @@ import (
 	"encoding/hex"
 	"strings"
 	"time"
+
+	"github.com/truewhile/MeBox/internal/model"
 )
 
 // Emby 发现类接口：NextUp / Similar / Genres。
@@ -21,7 +23,8 @@ const (
 )
 
 // NextUp 返回「每部在看的剧的下一集」，即 Emby 客户端首页「接下来播放」的数据源。
-func (e *EmbyService) NextUp(ctx context.Context, userID string, limit int) (map[string]any, error) {
+// seriesID 非空时只返回该剧的下一集（剧集详情页「继续播放」）；空则返回全站列表。
+func (e *EmbyService) NextUp(ctx context.Context, userID, seriesID string, limit int) (map[string]any, error) {
 	if limit <= 0 {
 		limit = embyNextUpDefaultLimit
 	}
@@ -31,11 +34,16 @@ func (e *EmbyService) NextUp(ctx context.Context, userID string, limit int) (map
 	if strings.TrimSpace(userID) == "" {
 		return emptyItemsEnvelope(0), nil
 	}
+	seriesID = strings.TrimSpace(seriesID)
 	discovery := e.discoveryService()
 	if discovery == nil {
 		return emptyItemsEnvelope(0), nil
 	}
 
+	if seriesID != "" {
+		return e.nextUpForSeries(ctx, userID, seriesID, limit)
+	}
+
 	rows, err := discovery.NextUpCandidates(ctx, userID, limit, e.mediaVisibility(ctx, userID))
 	if err != nil {
 		return nil, err
@@ -52,6 +60,140 @@ func (e *EmbyService) NextUp(ctx context.Context, userID string, limit int) (map
 	}, nil
 }
 
+// nextUpForSeries 只解析指定剧的下一集。远程挂载剧集按本机播放历史 + 远程
+// 分集列表计算，避免把其它本地剧的 NextUp 塞进详情页继续播放按钮。
+func (e *EmbyService) nextUpForSeries(ctx context.Context, userID, seriesID string, limit int) (map[string]any, error) {
+	if IsEmbyRemoteID(seriesID) {
+		return e.nextUpForRemoteSeries(ctx, userID, seriesID, limit)
+	}
+	discovery := e.discoveryService()
+	if discovery == nil {
+		return emptyItemsEnvelope(0), nil
+	}
+	// 多取候选再按 SeriesId 精确过滤，避免「全站 TopN」把目标剧挤掉。
+	scanLimit := embyNextUpMaxLimit
+	if limit > scanLimit {
+		scanLimit = limit
+	}
+	rows, err := discovery.NextUpCandidates(ctx, userID, scanLimit, e.mediaVisibility(ctx, userID))
+	if err != nil {
+		return nil, err
+	}
+	items, err := e.payloadsForMedia(ctx, rows, userID)
+	if err != nil {
+		return nil, err
+	}
+	filtered := make([]map[string]any, 0, 1)
+	for _, item := range items {
+		itemSeries, _ := item["SeriesId"].(string)
+		if itemSeries == seriesID {
+			filtered = append(filtered, item)
+			if len(filtered) >= limit {
+				break
+			}
+		}
+	}
+	return map[string]any{
+		"Items":            filtered,
+		"TotalRecordCount": int64(len(filtered)),
+	}, nil
+}
+
+// nextUpForRemoteSeries 用 MeBox 本地播放历史在远程剧的分集里找「下一集」。
+// 不透传远程账号的 NextUp，避免多用户共用挂载账号时串进度。
+func (e *EmbyService) nextUpForRemoteSeries(ctx context.Context, userID, seriesID string, limit int) (map[string]any, error) {
+	if e == nil || e.remote == nil || strings.TrimSpace(userID) == "" {
+		return emptyItemsEnvelope(0), nil
+	}
+	if limit <= 0 {
+		limit = 1
+	}
+	mountID, remoteSeriesID, ok := DecodeEmbyRemoteID(seriesID)
+	if !ok {
+		return emptyItemsEnvelope(0), nil
+	}
+	mount, acct, err := e.remote.ResolveMount(ctx, mountID)
+	if err != nil || mount == nil || acct == nil {
+		return emptyItemsEnvelope(0), nil
+	}
+	if !EmbyMountLibraryAllowed(e.mediaVisibility(ctx, userID), mount) {
+		return emptyItemsEnvelope(0), nil
+	}
+
+	prefix := EmbyRemoteIDPrefix + mountID + "~"
+	var hist []model.PlaybackHistory
+	if err := e.repo.DB.WithContext(ctx).
+		Where("user_id = ? AND position_ms > 0 AND media_id LIKE ?", userID, prefix+"%").
+		Order("watched_at desc").
+		Limit(nextUpHistoryScanLimit).
+		Find(&hist).Error; err != nil {
+		return nil, err
+	}
+	if len(hist) == 0 {
+		return emptyItemsEnvelope(0), nil
+	}
+
+	episodes, err := e.remote.RemoteEpisodes(ctx, mount, acct, remoteSeriesID)
+	if err != nil || len(episodes) == 0 {
+		return emptyItemsEnvelope(0), nil
+	}
+	epByID := make(map[string]*model.Media, len(episodes))
+	for i := range episodes {
+		epByID[episodes[i].ID] = &episodes[i]
+	}
+
+	var current *model.Media
+	currentCompleted := false
+	for i := range hist {
+		if m := epByID[hist[i].MediaID]; m != nil {
+			current = m
+			currentCompleted = hist[i].Completed
+			break
+		}
+	}
+	if current == nil {
+		return emptyItemsEnvelope(0), nil
+	}
+
+	completed := map[string]bool{}
+	epIDs := make([]string, 0, len(episodes))
+	for i := range episodes {
+		epIDs = append(epIDs, episodes[i].ID)
+	}
+	var done []model.PlaybackHistory
+	if err := e.repo.DB.WithContext(ctx).
+		Where("user_id = ? AND completed = ? AND media_id IN ?", userID, true, epIDs).
+		Find(&done).Error; err == nil {
+		for _, h := range done {
+			completed[h.MediaID] = true
+		}
+	}
+
+	next, ok := pickNextEpisode(episodes, current, currentCompleted, completed)
+	if !ok {
+		return emptyItemsEnvelope(0), nil
+	}
+	_, remoteEpID, ok := DecodeEmbyRemoteID(next.ID)
+	if !ok {
+		return emptyItemsEnvelope(0), nil
+	}
+	item, err := e.remote.RemoteItem(ctx, mount, acct, remoteEpID)
+	if err != nil || item == nil {
+		return emptyItemsEnvelope(0), nil
+	}
+	if err := e.mergeRemoteUserData(ctx, userID, item); err != nil {
+		return nil, err
+	}
+	items := []map[string]any{item}
+	if limit < len(items) {
+		items = items[:limit]
+	}
+	return map[string]any{
+		"Items":            items,
+		"TotalRecordCount": int64(len(items)),
+	}, nil
+}
+
 // SimilarItems 返回与指定条目相似的本地媒体。
 //
 // 找不到条目（或该条目对当前用户不可见）时返回空列表而不是错误：客户端会在

internal/service/emby_items_detail.go

@@ -299,8 +299,14 @@ func embyLatestSeriesRowLimit(limit int) int {
 }
 
 // ResumeItems 列出有未完成播放进度的媒体。
-func (e *EmbyService) ResumeItems(ctx context.Context, userID string, limit int) (map[string]any, error) {
-	return e.resumableItems(ctx, ItemsParams{UserID: userID, Limit: limit})
+// parentID 非空时收窄到该库 / 该剧（含虚拟 msgo-series-* ID）。
+func (e *EmbyService) ResumeItems(ctx context.Context, userID, parentID string, limit, startIndex int) (map[string]any, error) {
+	return e.resumableItems(ctx, ItemsParams{
+		UserID:     userID,
+		ParentID:   strings.TrimSpace(parentID),
+		Limit:      limit,
+		StartIndex: startIndex,
+	})
 }
 
 // favoriteItems returns favourited media for Emby clients, including mounted
@@ -434,6 +440,30 @@ func favoriteMatchesParent(ctx context.Context, e *EmbyService, parentID, mediaI
 	return wantMountID != "" && gotMountID == wantMountID
 }
 
+// resumeMatchesParent 判断续播条目是否属于 ParentId / SeriesId 作用域。
+// 本地剧集的 series_id 常为空，实际对外 ID 是 msgo-series-* 虚拟 ID，必须用
+// seriesIDForMedia 对齐，否则按剧收窄永远匹配不上。
+func resumeMatchesParent(ctx context.Context, e *EmbyService, parentID, libraryID, seriesID string, m *model.Media) bool {
+	if parentID == "" {
+		return true
+	}
+	if libraryID == parentID || seriesID == parentID {
+		return true
+	}
+	if m != nil && e.seriesIDForMedia(ctx, m) == parentID {
+		return true
+	}
+	if m != nil && e.seasonIDForMedia(ctx, m) == parentID {
+		return true
+	}
+	for _, id := range e.mergedLibraryIDs(ctx, parentID) {
+		if id == libraryID {
+			return true
+		}
+	}
+	return false
+}
+
 // resumableItems 返回未完成播放进度的媒体（包含本地媒体与挂载的远程媒体），支持分页。
 func (e *EmbyService) resumableItems(ctx context.Context, p ItemsParams) (map[string]any, error) {
 	if p.Limit <= 0 || p.Limit > 100 {
@@ -500,7 +530,7 @@ func (e *EmbyService) resumableItems(ctx context.Context, p ItemsParams) (map[st
 	localTotal, remoteTotal := 0, 0
 	for _, h := range hist {
 		if m, ok := byID[h.MediaID]; ok {
-			if p.ParentID != "" && m.LibraryID != p.ParentID && m.SeriesID != p.ParentID {
+			if p.ParentID != "" && !resumeMatchesParent(ctx, e, p.ParentID, m.LibraryID, m.SeriesID, m) {
 				continue
 			}
 			localTotal++

internal/service/emby_remote_nextup_test.go

@@ -0,0 +1,240 @@
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/config"
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+// 回归：挂载的远程 Emby 剧集里，只看了几秒就退出的那一集必须仍是 NextUp 的结果。
+// 客户端（Yamby 等）剧集详情页的「继续播放」直接取 NextUp 第一条，跳集会播错集。
+func TestMountedRemoteNextUpKeepsPartiallyWatchedEpisode(t *testing.T) {
+	episode := func(id string, index int) map[string]any {
+		return map[string]any{
+			"Id":                id,
+			"Name":              "第" + strconv.Itoa(index) + "集",
+			"Type":              "Episode",
+			"SeriesId":          "series-100",
+			"ParentIndexNumber": 1,
+			"IndexNumber":       index,
+			"RunTimeTicks":      14400640000,
+		}
+	}
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		switch r.URL.Path {
+		case "/emby/Users/uid-1/Items/series-100":
+			_ = json.NewEncoder(w).Encode(map[string]any{"Id": "series-100", "Name": "剧一", "Type": "Series"})
+		case "/emby/Users/uid-1/Items/ep-2":
+			_ = json.NewEncoder(w).Encode(episode("ep-2", 2))
+		case "/emby/Users/uid-1/Items":
+			q := r.URL.Query()
+			if q.Get("IncludeItemTypes") != "Episode" || q.Get("ParentId") != "series-100" {
+				w.WriteHeader(http.StatusBadRequest)
+				return
+			}
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"TotalRecordCount": 3,
+				"Items": []map[string]any{
+					episode("ep-1", 1),
+					episode("ep-2", 2),
+					episode("ep-3", 3),
+				},
+			})
+		default:
+			w.WriteHeader(http.StatusNotFound)
+		}
+	}))
+	defer server.Close()
+
+	db := newServiceTestDB(t, &model.StrmAccount{}, &model.EmbyMount{}, &model.PlaybackHistory{}, &model.User{})
+	repos := repository.New(db)
+
+	cfg := &config.Config{}
+	remote := NewEmbyRemoteService(cfg, zap.NewNop(), repos, NewCryptoService("", zap.NewNop()))
+	svc := NewEmbyService(cfg, zap.NewNop(), repos).SetEmbyRemote(remote)
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            server.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	acct := &model.StrmAccount{
+		Base:     model.Base{ID: "acct-1"},
+		Name:     "远程 Emby",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}
+	if err := repos.StrmAccount.Create(t.Context(), acct); err != nil {
+		t.Fatalf("create account: %v", err)
+	}
+	mount := &model.EmbyMount{
+		Base:           model.Base{ID: "mount-1"},
+		AccountID:      acct.ID,
+		RemoteViewID:   "view-1",
+		RemoteViewName: "新番连载",
+		CollectionType: "tvshows",
+		Enabled:        true,
+	}
+	if err := repos.EmbyMount.Create(t.Context(), mount); err != nil {
+		t.Fatalf("create mount: %v", err)
+	}
+	user := &model.User{
+		Base:         model.Base{ID: "user-1"},
+		Username:     "viewer",
+		PasswordHash: "x",
+		Role:         "user",
+		Tier:         "free",
+		IsActive:     true,
+	}
+	if err := repos.User.Create(t.Context(), user); err != nil {
+		t.Fatalf("create user: %v", err)
+	}
+
+	// 第 2 集只播了 3.5 秒就退出：有进度、未标记看完。
+	if err := repos.DB.Create(&model.PlaybackHistory{
+		UserID:     user.ID,
+		MediaID:    EncodeEmbyRemoteID(mount.ID, "ep-2"),
+		PositionMs: 3582,
+		DurationMs: 1440064,
+		WatchedAt:  time.Now(),
+		Completed:  false,
+	}).Error; err != nil {
+		t.Fatalf("create history: %v", err)
+	}
+
+	envelope, err := svc.NextUp(t.Context(), user.ID, EncodeEmbyRemoteID(mount.ID, "series-100"), 1)
+	if err != nil {
+		t.Fatalf("NextUp: %v", err)
+	}
+	items, _ := envelope["Items"].([]map[string]any)
+	if len(items) != 1 {
+		t.Fatalf("items = %d, want 1 (%#v)", len(items), envelope)
+	}
+	wantID := EncodeEmbyRemoteID(mount.ID, "ep-2")
+	if id, _ := items[0]["Id"].(string); id != wantID {
+		t.Fatalf("Id = %q, want %q (未看完的那一集不能被跳过)", id, wantID)
+	}
+	userData, _ := items[0]["UserData"].(map[string]any)
+	if ticks, _ := userData["PlaybackPositionTicks"].(int64); ticks != 35820000 {
+		t.Fatalf("PlaybackPositionTicks = %#v, want 35820000 (详情页要能续播到 3.5 秒)", userData["PlaybackPositionTicks"])
+	}
+}
+
+// 远程剧集已看完当前一集时，NextUp 仍要指向下一集。
+func TestMountedRemoteNextUpAfterCompletedEpisode(t *testing.T) {
+	episode := func(id string, index int) map[string]any {
+		return map[string]any{
+			"Id":                id,
+			"Name":              "第" + strconv.Itoa(index) + "集",
+			"Type":              "Episode",
+			"SeriesId":          "series-100",
+			"ParentIndexNumber": 1,
+			"IndexNumber":       index,
+			"RunTimeTicks":      14400640000,
+		}
+	}
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		switch r.URL.Path {
+		case "/emby/Users/uid-1/Items/series-100":
+			_ = json.NewEncoder(w).Encode(map[string]any{"Id": "series-100", "Name": "剧一", "Type": "Series"})
+		case "/emby/Users/uid-1/Items/ep-3":
+			_ = json.NewEncoder(w).Encode(episode("ep-3", 3))
+		case "/emby/Users/uid-1/Items":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"TotalRecordCount": 3,
+				"Items": []map[string]any{
+					episode("ep-1", 1),
+					episode("ep-2", 2),
+					episode("ep-3", 3),
+				},
+			})
+		default:
+			w.WriteHeader(http.StatusNotFound)
+		}
+	}))
+	defer server.Close()
+
+	db := newServiceTestDB(t, &model.StrmAccount{}, &model.EmbyMount{}, &model.PlaybackHistory{}, &model.User{})
+	repos := repository.New(db)
+
+	cfg := &config.Config{}
+	remote := NewEmbyRemoteService(cfg, zap.NewNop(), repos, NewCryptoService("", zap.NewNop()))
+	svc := NewEmbyService(cfg, zap.NewNop(), repos).SetEmbyRemote(remote)
+
+	rawConfig, _ := json.Marshal(map[string]string{
+		"url":            server.URL,
+		"api_key":        "test-api-key",
+		"remote_user_id": "uid-1",
+	})
+	acct := &model.StrmAccount{
+		Base:     model.Base{ID: "acct-1"},
+		Name:     "远程 Emby",
+		Provider: model.StrmProviderEmbyRemote,
+		Config:   string(rawConfig),
+		Enabled:  true,
+	}
+	if err := repos.StrmAccount.Create(t.Context(), acct); err != nil {
+		t.Fatalf("create account: %v", err)
+	}
+	mount := &model.EmbyMount{
+		Base:           model.Base{ID: "mount-1"},
+		AccountID:      acct.ID,
+		RemoteViewID:   "view-1",
+		RemoteViewName: "新番连载",
+		CollectionType: "tvshows",
+		Enabled:        true,
+	}
+	if err := repos.EmbyMount.Create(t.Context(), mount); err != nil {
+		t.Fatalf("create mount: %v", err)
+	}
+	user := &model.User{
+		Base:         model.Base{ID: "user-1"},
+		Username:     "viewer",
+		PasswordHash: "x",
+		Role:         "user",
+		Tier:         "free",
+		IsActive:     true,
+	}
+	if err := repos.User.Create(t.Context(), user); err != nil {
+		t.Fatalf("create user: %v", err)
+	}
+
+	// 第 2 集已整集看完。
+	if err := repos.DB.Create(&model.PlaybackHistory{
+		UserID:     user.ID,
+		MediaID:    EncodeEmbyRemoteID(mount.ID, "ep-2"),
+		PositionMs: 1440064,
+		DurationMs: 1440064,
+		WatchedAt:  time.Now(),
+		Completed:  true,
+	}).Error; err != nil {
+		t.Fatalf("create history: %v", err)
+	}
+
+	envelope, err := svc.NextUp(context.Background(), user.ID, EncodeEmbyRemoteID(mount.ID, "series-100"), 1)
+	if err != nil {
+		t.Fatalf("NextUp: %v", err)
+	}
+	items, _ := envelope["Items"].([]map[string]any)
+	if len(items) != 1 {
+		t.Fatalf("items = %d, want 1 (%#v)", len(items), envelope)
+	}
+	if id, _ := items[0]["Id"].(string); id != EncodeEmbyRemoteID(mount.ID, "ep-3") {
+		t.Fatalf("Id = %q, want ep-3", id)
+	}
+}

internal/service/media_discovery.go

@@ -212,10 +212,11 @@ func (s *MediaDiscoveryService) NextUpCandidates(ctx context.Context, userID str
 		byID[watchedRows[i].ID] = &watchedRows[i]
 	}
 
-	// 按最近观看顺序归并到「剧」维度，同时记住该剧最近的已看集。
+	// 按最近观看顺序归并到「剧」维度，同时记住该剧最近看的那一集以及它是否看完。
 	type seriesState struct {
-		key     string
-		current *model.Media
+		key       string
+		current   *model.Media
+		completed bool
 	}
 	states := make([]seriesState, 0, len(histories))
 	seen := make(map[string]bool, len(histories))
@@ -229,7 +230,7 @@ func (s *MediaDiscoveryService) NextUpCandidates(ctx context.Context, userID str
 			continue
 		}
 		seen[key] = true
-		states = append(states, seriesState{key: key, current: m})
+		states = append(states, seriesState{key: key, current: m, completed: h.Completed})
 	}
 	if len(states) == 0 {
 		return nil, nil
@@ -293,7 +294,7 @@ func (s *MediaDiscoveryService) NextUpCandidates(ctx context.Context, userID str
 		if len(out) >= limit {
 			break
 		}
-		next, ok := pickNextEpisode(bySeries[st.key], st.current, completed)
+		next, ok := pickNextEpisode(bySeries[st.key], st.current, st.completed, completed)
 		if !ok {
 			continue
 		}
@@ -341,16 +342,27 @@ func (s *MediaDiscoveryService) completedMediaIDs(ctx context.Context, userID st
 	return out
 }
 
-// pickNextEpisode 在候选集中选出严格晚于 current 的、编号最小的一集。
-// 比较顺序为 (季, 集)，因此跨季时自然落到下一季第一集。
-func pickNextEpisode(candidates []model.Media, current *model.Media, completed map[string]bool) (model.Media, bool) {
+// pickNextEpisode 选出这部剧「接下来该看的那一集」。
+//
+// anchor 是这部剧最近一次播放的那一集，anchorCompleted 表示那一集是否已看完：
+//   - 没看完（只播了几秒就退出、或中途暂停）时，接下来该看的仍是这一集本身。
+//     否则详情页的「继续播放」会直接跳到下一集，用户刚看的那一集被静默跳过。
+//   - 已看完时，才在候选集里取严格晚于它的、编号最小的一集；比较顺序为
+//     (季, 集)，因此跨季时自然落到下一季第一集。
+func pickNextEpisode(candidates []model.Media, anchor *model.Media, anchorCompleted bool, completed map[string]bool) (model.Media, bool) {
+	if anchor == nil {
+		return model.Media{}, false
+	}
+	if !anchorCompleted {
+		return *anchor, true
+	}
 	var best model.Media
 	found := false
 	for _, candidate := range candidates {
-		if candidate.ID == current.ID || completed[candidate.ID] {
+		if candidate.ID == anchor.ID || completed[candidate.ID] {
 			continue
 		}
-		if !episodeAfter(candidate, *current) {
+		if !episodeAfter(candidate, *anchor) {
 			continue
 		}
 		if !found || episodeBefore(candidate, best) {

internal/service/media_discovery_nextup_test.go

@@ -13,6 +13,9 @@ import (
 )
 
 // seedEpisode 插入一集，并把播放历史指向 `watched`（nil 表示没有历史）。
+//
+// position_ms / duration_ms 只是占位值，NextUp 只看历史行的 completed 字段：
+// 未看完的那一集本身就是「接下来该看的一集」。
 func seedEpisode(
 	t *testing.T,
 	repos *repository.Container,
@@ -78,7 +81,7 @@ func TestNextUpPicksNextEpisode(t *testing.T) {
 	libID := seedDiscoveryLibrary(t, repos, "tv")
 	watchedAt := time.Now().Add(-time.Hour)
 
-	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 1, &watchedAt, false)
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 1, &watchedAt, true) // 第 1 集已看完
 	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 2, nil, false)
 	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 3, nil, false)
 
@@ -89,6 +92,40 @@ func TestNextUpPicksNextEpisode(t *testing.T) {
 	}
 }
 
+// 回归：只播了几秒就退出（未看完）时，「接下来该看的一集」仍是这一集本身。
+// 客户端（Yamby 等）剧集详情页的「继续播放」直接取 NextUp 第一条，跳集会播错集。
+func TestNextUpKeepsPartiallyWatchedEpisode(t *testing.T) {
+	repos := newDiscoveryTestDB(t)
+	libID := seedDiscoveryLibrary(t, repos, "tv")
+	watchedAt := time.Now().Add(-time.Minute)
+
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 1, nil, true)
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 2, &watchedAt, false) // 第 2 集只看了几秒
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 3, nil, false)
+
+	svc := NewMediaDiscoveryService(zap.NewNop(), repos)
+	got := nextUpIDs(t, svc, MediaVisibility{IncludeNSFW: true})
+	if len(got) != 1 || got[0] != "S1E2" {
+		t.Fatalf("next up = %v, want [S1E2] (未看完的那一集不能跳过)", got)
+	}
+}
+
+// 未看完的是这部剧的最后一集时也要返回它，不能因为「后面没有集了」而返回空。
+func TestNextUpKeepsPartiallyWatchedFinalEpisode(t *testing.T) {
+	repos := newDiscoveryTestDB(t)
+	libID := seedDiscoveryLibrary(t, repos, "tv")
+	watchedAt := time.Now().Add(-time.Minute)
+
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 1, nil, true)
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 2, &watchedAt, false) // 最后一集未看完
+
+	svc := NewMediaDiscoveryService(zap.NewNop(), repos)
+	got := nextUpIDs(t, svc, MediaVisibility{IncludeNSFW: true})
+	if len(got) != 1 || got[0] != "S1E2" {
+		t.Fatalf("next up = %v, want [S1E2]", got)
+	}
+}
+
 // 电影不进 NextUp：NextUp 的语义是「下一集」，电影由 Resume 接口负责。
 func TestNextUpSkipsMovies(t *testing.T) {
 	repos := newDiscoveryTestDB(t)
@@ -104,6 +141,10 @@ func TestNextUpSkipsMovies(t *testing.T) {
 }
 
 // 同一部剧有多条未看完历史时，只能出一条，且指向最靠后的已看集的下一集。
+// 同一部剧有多条未看完历史时只能出一条，且指向最近看过的那一集。
+//
+// 最近那一集（S1E2）本身还没看完，所以它就是「接下来该看的一集」；
+// S1E1 只是更早的中间进度，不能据此跳到 S1E3。
 func TestNextUpOneEntryPerSeries(t *testing.T) {
 	repos := newDiscoveryTestDB(t)
 	libID := seedDiscoveryLibrary(t, repos, "tv")
@@ -116,8 +157,8 @@ func TestNextUpOneEntryPerSeries(t *testing.T) {
 
 	svc := NewMediaDiscoveryService(zap.NewNop(), repos)
 	got := nextUpIDs(t, svc, MediaVisibility{IncludeNSFW: true})
-	if len(got) != 1 || got[0] != "S1E3" {
-		t.Fatalf("next up = %v, want [S1E3]", got)
+	if len(got) != 1 || got[0] != "S1E2" {
+		t.Fatalf("next up = %v, want [S1E2]", got)
 	}
 }
 
@@ -127,7 +168,7 @@ func TestNextUpCrossesSeason(t *testing.T) {
 	libID := seedDiscoveryLibrary(t, repos, "tv")
 	watchedAt := time.Now().Add(-time.Hour)
 
-	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 12, &watchedAt, false)
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 12, &watchedAt, true) // 第 1 季最后一集已看完
 	seedEpisode(t, repos, libID, "series-1", "剧一", 2, 1, nil, false)
 	seedEpisode(t, repos, libID, "series-1", "剧一", 2, 2, nil, false)
 
@@ -144,8 +185,8 @@ func TestNextUpSkipsCompletedEpisode(t *testing.T) {
 	libID := seedDiscoveryLibrary(t, repos, "tv")
 	watchedAt := time.Now().Add(-time.Hour)
 
-	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 1, &watchedAt, false)
-	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 2, nil, true) // 已看完
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 1, &watchedAt, true) // 已看完，下一集是 S1E3
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 2, nil, true)        // 已看完
 	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 3, nil, false)
 
 	svc := NewMediaDiscoveryService(zap.NewNop(), repos)
@@ -155,13 +196,13 @@ func TestNextUpSkipsCompletedEpisode(t *testing.T) {
 	}
 }
 
-// 追到最后一集时没有下一集，结果为空而不是重复返回最后一集。
+// 追到最后一集且已看完时没有下一集，结果为空而不是重复返回最后一集。
 func TestNextUpEmptyAtSeriesEnd(t *testing.T) {
 	repos := newDiscoveryTestDB(t)
 	libID := seedDiscoveryLibrary(t, repos, "tv")
 	watchedAt := time.Now().Add(-time.Hour)
 
-	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 3, &watchedAt, false)
+	seedEpisode(t, repos, libID, "series-1", "剧一", 1, 3, &watchedAt, true)
 
 	svc := NewMediaDiscoveryService(zap.NewNop(), repos)
 	if got := nextUpIDs(t, svc, MediaVisibility{IncludeNSFW: true}); len(got) != 0 {
@@ -176,7 +217,7 @@ func TestNextUpRespectsVisibility(t *testing.T) {
 	hiddenLib := seedDiscoveryLibrary(t, repos, "tv")
 	watchedAt := time.Now().Add(-time.Hour)
 
-	seedEpisode(t, repos, visibleLib, "series-1", "剧一", 1, 1, &watchedAt, false)
+	seedEpisode(t, repos, visibleLib, "series-1", "剧一", 1, 1, &watchedAt, true)
 	seedEpisode(t, repos, hiddenLib, "series-1", "剧一", 1, 2, nil, false)
 
 	svc := NewMediaDiscoveryService(zap.NewNop(), repos)

internal/service/media_probe.go

@@ -18,18 +18,7 @@ import (
 	"github.com/truewhile/MeBox/internal/repository"
 )
 
-// 播放档案里可选的片头/片尾数据来源。
-const (
-	// SegmentSourceAuto 优先用文件内嵌章节（对这个片源最准），没有可用章节时
-	// 回落到 TheIntroDB。
-	SegmentSourceAuto = "auto"
-	// SegmentSourceFFprobe 只用文件内嵌章节。
-	SegmentSourceFFprobe = "ffprobe"
-	// SegmentSourceTheIntroDB 只用社区数据库。它同时是 media_segments.source 的
-	// 取值——两处必须一致，所以直接复用提供方的常量。
-	SegmentSourceTheIntroDB = IntroDBSource
-)
-
+// 探测结果的缓存与预算策略。
 const (
 	// mediaProbeTimeout 是一次后台探测的总预算（含把 strm 目标解析成直链）。
 	mediaProbeTimeout = 90 * time.Second
@@ -41,31 +30,25 @@ const (
 	mediaProbeErrorLimit = 200
 )
 
-// NormalizeSegmentSource 把任意输入收敛到合法取值；未知值一律按 auto 处理
-// （历史档案里这一列可能还是空串）。
-func NormalizeSegmentSource(raw string) string {
-	switch strings.ToLower(strings.TrimSpace(raw)) {
-	case SegmentSourceFFprobe:
-		return SegmentSourceFFprobe
-	case SegmentSourceTheIntroDB:
-		return SegmentSourceTheIntroDB
-	default:
-		return SegmentSourceAuto
-	}
-}
-
 // mediaProber 是 MediaProbeService 需要的探测能力。抽成接口是为了在测试里注入
 // 桩，避免依赖真实 ffprobe 二进制。
 type mediaProber interface {
 	ProbeFull(ctx context.Context, input ProbeInput) (*FullProbeResult, error)
 }
 
-// MediaProbeService 用 ffprobe 提取媒体的完整信息（容器、每路轨道、内嵌章节），
-// 把结果落库缓存，并把章节映射成可跳过的片头/片尾区间。
+// MediaProbeService 用 ffprobe 提取媒体的基础信息（容器、每路轨道、内嵌章节）
+// 并落库缓存。
 //
-// 核心约束：一次探测要 3～4 秒（远端直链更慢，跨洋要跑三次 HTTP 事务），所以
-// 只允许异步跑。播放链路永远只读缓存，拿不到就下次再来——绝不能让一次探测挡在
-// 起播路径上。
+// 定位是「播放时顺带补齐媒体信息」：STRM / 云盘媒体在扫描阶段拿不到时长，而
+// 播放链路要用缓存里的时长来换算「延续到片尾」这类区间，详情页将来也直接读这份
+// 媒体信息。
+//
+// 它**不参与片头/片尾判定**：章节标题绝大多数没有语义（生产库实测抽样 64 个
+// 文件，命中 0 个），拿它去猜跳过点只会给出错误的位置，时间轴数据仍然只信
+// TheIntroDB。
+//
+// 核心约束：一次探测要 2～4.5 秒（远端直链要跨洋跑几次 HTTP 事务），所以只允许
+// 异步跑，播放链路永远只读缓存。
 type MediaProbeService struct {
 	log   *zap.Logger
 	repo  *repository.Container
@@ -200,22 +183,11 @@ func (s *MediaProbeService) probeInput(ctx context.Context, m *model.Media) (Pro
 	return ProbeInput{}, errors.New("strm probe source unavailable")
 }
 
-// persistProbe 把一次成功的探测落库：先写片段区间，再写探测行。
-//
-// 顺序很重要：探测行是「已经探过」的标记，客户端靠它决定要不要继续轮询。先写
-// 它会让客户端在区间还没落库时就停止等待。
+// persistProbe 把一次成功的探测落库。
 func (s *MediaProbeService) persistProbe(ctx context.Context, m *model.Media, result *FullProbeResult) error {
-	if s.repo == nil || s.repo.MediaProbe == nil || s.repo.MediaSegment == nil {
+	if s.repo == nil || s.repo.MediaProbe == nil {
 		return errors.New("media probe repository not wired")
 	}
-	rows := chaptersToSegments(result.Chapters)
-	for i := range rows {
-		rows[i].MediaID = m.ID
-		rows[i].SeriesID = m.SeriesID
-	}
-	if err := s.repo.MediaSegment.ReplaceForMedia(ctx, m.ID, SegmentSourceFFprobe, rows); err != nil {
-		return err
-	}
 	payload, err := result.PayloadJSON()
 	if err != nil {
 		return err

internal/service/media_probe_chapters.go

@@ -1,72 +0,0 @@
-package service
-
-import (
-	"regexp"
-	"strings"
-
-	"github.com/truewhile/MeBox/internal/model"
-)
-
-// chapterMinMs 是章节被判为「可跳过区间」的最短长度。太短的章节没有可跳过的
-// 内容，多半是章节切分噪声。
-const chapterMinMs = 2000
-
-// chapterKindPatterns 是章节标题 → 片段类型的映射表。
-//
-// 只认「有语义的」标题。大量发布组的章节叫 Chapter 01/02…，那种一律不猜：
-// auto 档会优先采用章节数据，猜错会让跳过按钮指到错误的位置，比拿不到数据更糟。
-// 匹配不到就返回空串，让 auto 回落到 TheIntroDB。
-//
-// 西文关键词要求词边界（前后不能是字母），否则 "Options" 会被当成片头（op）、
-// "Weekend" 会被当成片尾（end）。中日文关键词按子串匹配（CJK 不是 [a-z]，所以
-// 同一条边界规则对它们天然成立）。
-var chapterKindPatterns = []struct {
-	kind    string
-	pattern *regexp.Regexp
-}{
-	{model.SegmentKindIntro, regexp.MustCompile(`(?i)(^|[^a-z])(intro|opening|op|ncop)([^a-z]|$)|片头|オープニング`)},
-
-	{model.SegmentKindRecap, regexp.MustCompile(`(?i)(^|[^a-z])(recap|previously)([^a-z]|$)|前情|回顾|あらすじ`)},
-
-	{model.SegmentKindCredits, regexp.MustCompile(`(?i)(^|[^a-z])(credits|ending|end|outro|nced|ed)([^a-z]|$)|片尾|エンディング`)},
-
-	{model.SegmentKindPreview, regexp.MustCompile(`(?i)(^|[^a-z])(preview|next\s+episode|next\s+time)([^a-z]|$)|预告|次回|予告`)},
-}
-
-// chapterTitleKind 返回章节标题对应的片段类型；识别不出来时返回空串。
-func chapterTitleKind(title string) string {
-	title = strings.TrimSpace(title)
-	if title == "" {
-		return ""
-	}
-	for _, entry := range chapterKindPatterns {
-		if entry.pattern.MatchString(title) {
-			return entry.kind
-		}
-	}
-	return ""
-}
-
-// chaptersToSegments 把内嵌章节映射成可跳过的区间。
-//
-// 只有标题能识别出类型时才产出区间；EndMs 为 0 的章节落成 0（= 延续到片尾），
-// 与提供方契约一致，由客户端按媒体总时长补齐。
-func chaptersToSegments(chapters []ProbeChapter) []model.MediaSegment {
-	rows := make([]model.MediaSegment, 0, 4)
-	for _, chapter := range chapters {
-		kind := chapterTitleKind(chapter.Title)
-		if kind == "" || chapter.StartMs < 0 {
-			continue
-		}
-		if chapter.EndMs > 0 && chapter.EndMs-chapter.StartMs < chapterMinMs {
-			continue
-		}
-		rows = append(rows, model.MediaSegment{
-			Kind:    kind,
-			StartMs: chapter.StartMs,
-			EndMs:   chapter.EndMs,
-			Source:  SegmentSourceFFprobe,
-		})
-	}
-	return rows
-}

internal/service/media_probe_chapters_test.go

@@ -1,111 +0,0 @@
-package service
-
-import (
-	"testing"
-
-	"github.com/truewhile/MeBox/internal/model"
-)
-
-// 章节标题只有「有语义」时才认。西文关键词要词边界，否则 Options / Weekend
-// 这类标题会被误判成片头/片尾；中文日文按子串匹配。
-func TestChapterTitleKind(t *testing.T) {
-	cases := []struct {
-		title string
-		want  string
-	}{
-		{"Intro", model.SegmentKindIntro},
-		{"Opening", model.SegmentKindIntro},
-		{"Opening Title", model.SegmentKindIntro},
-		{"OP", model.SegmentKindIntro},
-		{"NCOP", model.SegmentKindIntro},
-		{"片头", model.SegmentKindIntro},
-		{"オープニング", model.SegmentKindIntro},
-
-		{"Recap", model.SegmentKindRecap},
-		{"Previously on", model.SegmentKindRecap},
-		{"前情提要", model.SegmentKindRecap},
-		{"回顾", model.SegmentKindRecap},
-		{"あらすじ", model.SegmentKindRecap},
-
-		{"End Credits", model.SegmentKindCredits},
-		{"Credits", model.SegmentKindCredits},
-		{"Ending", model.SegmentKindCredits},
-		{"ED", model.SegmentKindCredits},
-		{"Outro", model.SegmentKindCredits},
-		{"片尾", model.SegmentKindCredits},
-		{"エンディング", model.SegmentKindCredits},
-
-		{"Next Episode", model.SegmentKindPreview},
-		{"Next time", model.SegmentKindPreview},
-		{"Preview", model.SegmentKindPreview},
-		{"预告", model.SegmentKindPreview},
-		{"次回予告", model.SegmentKindPreview},
-
-		// 无语义或容易误判的标题一律不认：猜错比没有数据更糟。
-		{"", ""},
-		{"   ", ""},
-		{"Chapter 01", ""},
-		{"Chapter 12", ""},
-		{"Options", ""},
-		{"Weekend", ""},
-		{"Main Menu", ""},
-		{"Menu", ""},
-	}
-	for _, tc := range cases {
-		if got := chapterTitleKind(tc.title); got != tc.want {
-			t.Errorf("chapterTitleKind(%q) = %q, want %q", tc.title, got, tc.want)
-		}
-	}
-}
-
-func TestChaptersToSegmentsOnlyKeepsSemanticChapters(t *testing.T) {
-	rows := chaptersToSegments([]ProbeChapter{
-		{Index: 0, StartMs: 0, EndMs: 95_000, Title: "Chapter 01"},
-		{Index: 1, StartMs: 228_664, EndMs: 246_143, Title: "Opening"},
-		{Index: 2, StartMs: 246_500, EndMs: 247_400, Title: "Recap"}, // 不足 chapterMinMs
-		{Index: 3, StartMs: 3_431_000, EndMs: 0, Title: "End Credits"},
-	})
-	if len(rows) != 2 {
-		t.Fatalf("rows = %#v, want 2 (Opening + End Credits)", rows)
-	}
-	if rows[0].Kind != model.SegmentKindIntro || rows[0].StartMs != 228_664 || rows[0].EndMs != 246_143 {
-		t.Fatalf("first row = %#v", rows[0])
-	}
-	if rows[1].Kind != model.SegmentKindCredits || rows[1].StartMs != 3_431_000 || rows[1].EndMs != 0 {
-		t.Fatalf("second row = %#v", rows[1])
-	}
-	for _, row := range rows {
-		if row.Source != SegmentSourceFFprobe {
-			t.Fatalf("source = %q, want %q", row.Source, SegmentSourceFFprobe)
-		}
-	}
-}
-
-func TestChaptersToSegmentsIgnoresUntitledAndNegativeChapters(t *testing.T) {
-	rows := chaptersToSegments([]ProbeChapter{
-		{Index: 0, StartMs: 0, EndMs: 60_000, Title: ""},
-		{Index: 1, StartMs: -1, EndMs: 60_000, Title: "Intro"},
-	})
-	if len(rows) != 0 {
-		t.Fatalf("rows = %#v, want none", rows)
-	}
-}
-
-func TestNormalizeSegmentSourceFallsBackToAuto(t *testing.T) {
-	cases := map[string]string{
-		"":           SegmentSourceAuto,
-		"  ":         SegmentSourceAuto,
-		"auto":       SegmentSourceAuto,
-		"AUTO":       SegmentSourceAuto,
-		"ffprobe":    SegmentSourceFFprobe,
-		" FFprobe  ": SegmentSourceFFprobe,
-		"theintrodb": SegmentSourceTheIntroDB,
-		"TheIntroDB": SegmentSourceTheIntroDB,
-		"aniskip":    SegmentSourceAuto, // 未知值按 auto 处理
-	}
-	for input, want := range cases {
-		if got := NormalizeSegmentSource(input); got != want {
-			t.Errorf("NormalizeSegmentSource(%q) = %q, want %q", input, got, want)
-		}
-	}
-}

internal/service/media_probe_test.go

@@ -110,7 +110,7 @@ func waitForCondition(t *testing.T, timeout time.Duration, cond func() bool) {
 	t.Fatal("condition was not met before the deadline")
 }
 
-func TestMediaProbeRunPersistsSegmentsAndProbeRow(t *testing.T) {
+func TestMediaProbeRunPersistsProbeRow(t *testing.T) {
 	svc, repos, m := newProbeFixture(t)
 	prober := &stubProber{result: chapterProbeResult()}
 	svc.probe = prober
@@ -123,17 +123,6 @@ func TestMediaProbeRunPersistsSegmentsAndProbeRow(t *testing.T) {
 		t.Fatalf("probe source = %q, want the local path %q", got, m.Path)
 	}
 
-	rows, err := repos.MediaSegment.ListByMediaSource(t.Context(), m.ID, SegmentSourceFFprobe)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(rows) != 2 {
-		t.Fatalf("segments = %#v, want the 2 semantic chapters", rows)
-	}
-	if rows[0].Kind != model.SegmentKindIntro || rows[0].SeriesID != "s-1" {
-		t.Fatalf("segment[0] = %#v, want an intro carrying the series id", rows[0])
-	}
-
 	probe, err := repos.MediaProbe.Get(t.Context(), m.ID)
 	if err != nil {
 		t.Fatal(err)
@@ -170,7 +159,7 @@ func TestMediaProbeRunPersistsSegmentsAndProbeRow(t *testing.T) {
 	}
 }
 
-func TestMediaProbeFailureKeepsPreviousProbeAndSegments(t *testing.T) {
+func TestMediaProbeFailureKeepsPreviousSummary(t *testing.T) {
 	svc, repos, m := newProbeFixture(t)
 	prober := &stubProber{result: chapterProbeResult()}
 	svc.probe = prober
@@ -186,17 +175,11 @@ func TestMediaProbeFailureKeepsPreviousProbeAndSegments(t *testing.T) {
 	if probe == nil || probe.LastError == "" {
 		t.Fatal("a failed re-probe must record the error")
 	}
-	// 关键：失败只更新时间与错误信息，上一次成功的媒体信息与片段必须留着。
-	if probe.DurationSec != 1451 || probe.Container != "matroska,webm" {
+	// 关键：失败只更新时间与错误信息，上一次成功的媒体信息必须留着——
+	// 否则一次失败的重探会把已经拿到的时长（片尾区间换算要用）抹掉。
+	if probe.DurationSec != 1451 || probe.Container != "matroska,webm" || probe.Payload == "" {
 		t.Fatalf("a failed re-probe wiped the previous summary: %#v", probe)
 	}
-	rows, err := repos.MediaSegment.ListByMediaSource(t.Context(), m.ID, SegmentSourceFFprobe)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(rows) != 2 {
-		t.Fatalf("segments = %#v, want the previous 2 kept", rows)
-	}
 }
 
 // 探测有结论后就不再重探；失败要等冷却期过去才允许重试。

internal/service/media_segment.go

@@ -18,9 +18,21 @@ import (
 // 片段数据的缓存时长。命中过说明社区库里已有记录、数据很少变动，可以放很久；
 // 未命中说明这部片还没人贡献，隔一段时间再试一次即可——负缓存是必须的，否则
 // 每次播放一部没有片段数据的影片都会打一次外网。
+//
+// 未命中 TTL 刻意短于命中：社区库在持续补充，尤其是热门剧，24h 重试一次比
+// 锁死 7 天更能跟上贡献节奏；预热任务也会优先扫最近播放过的 miss。
 const (
 	segmentFoundTTL   = 30 * 24 * time.Hour
-	segmentMissingTTL = 7 * 24 * time.Hour
+	segmentMissingTTL = 24 * time.Hour
+
+	// SegmentSourceManual / Propagated 与 IntroDBSource 并列，播放时按优先级合并。
+	SegmentSourceManual     = "manual"
+	SegmentSourcePropagated = "propagated"
+
+	// segmentPrewarmDefaultLimit 是一次预热任务最多处理的媒体数，避免单次跑太久。
+	segmentPrewarmDefaultLimit = 200
+	// segmentPrewarmInterval 是预热请求之间的间隔，压低对 TheIntroDB 的 429。
+	segmentPrewarmInterval = time.Second
 )
 
 // SegmentView 是播放器消费的最小片段结构，避免把库内字段（source 等）暴露给前端。
@@ -44,14 +56,29 @@ type MediaSegmentService struct {
 	log     *zap.Logger
 	repo    *repository.Container
 	introdb *IntroDBService
-	// probe 负责从文件内嵌章节里提取片头/片尾（异步、落库）。未注入时只用
-	// TheIntroDB。
+	// probe 负责异步补齐媒体信息（主要是 STRM 时长）。未注入时只用 TheIntroDB。
 	probe *MediaProbeService
+	// prewarmGap 是预热两次 IntroDB 请求之间的间隔；测试可设为 0。
+	prewarmGap time.Duration
+	now        func() time.Time
 }
 
 // NewMediaSegmentService is the constructor.
 func NewMediaSegmentService(log *zap.Logger, repo *repository.Container) *MediaSegmentService {
-	return &MediaSegmentService{log: log, repo: repo}
+	return &MediaSegmentService{
+		log:        log,
+		repo:       repo,
+		prewarmGap: segmentPrewarmInterval,
+		now:        time.Now,
+	}
+}
+
+// SetPrewarmGap overrides the delay between prewarm fetches (tests use 0).
+func (s *MediaSegmentService) SetPrewarmGap(gap time.Duration) *MediaSegmentService {
+	if s != nil {
+		s.prewarmGap = gap
+	}
+	return s
 }
 
 // SetIntroDB wires the provider. Without it the service only reads cached rows.
@@ -62,8 +89,8 @@ func (s *MediaSegmentService) SetIntroDB(p *IntroDBService) *MediaSegmentService
 	return s
 }
 
-// SetProbe wires the in-file chapter extractor. Without it the ffprobe source
-// simply yields nothing and auto falls back to TheIntroDB.
+// SetProbe wires the async media probe (duration backfill for STRM). Without it
+// open-ended credits still work once duration is known from elsewhere.
 func (s *MediaSegmentService) SetProbe(p *MediaProbeService) *MediaSegmentService {
 	if s != nil {
 		s.probe = p
@@ -71,138 +98,45 @@ func (s *MediaSegmentService) SetProbe(p *MediaProbeService) *MediaSegmentServic
 	return s
 }
 
-// SegmentsResult 是播放器一次查询的结果。
-type SegmentsResult struct {
-	// Segments 是按当前来源选定、可以直接用来跳过的区间。
-	Segments []model.MediaSegment
-	// Pending 为 true 表示 ffprobe 提取还在后台跑：这次可能还没有章节数据，
-	// 客户端过几秒再拉一次就能拿到；那时如果片头还没播完，跳过按钮会自动出现。
-	Pending bool
-}
-
-// SegmentsForPlayback 返回播放器该用的片段，并按需触发数据补齐。
+// ListForPlayback returns the segments known for a media item, refreshing from
+// the provider when the cache is stale.
 //
-// 它绝不做阻塞起播的事：TheIntroDB 的抓取沿用原来的「以调用方 deadline 为预算」，
-// ffprobe 提取则完全异步。抓取或提取失败只是少一个「跳过片头」按钮、或晚几秒
-// 出现，绝不能让播放报错。
-func (s *MediaSegmentService) SegmentsForPlayback(ctx context.Context, m *model.Media, source string) (SegmentsResult, error) {
+// 它不做任何阻塞起播的事情——调用方是在播放已经开始之后用一次独立请求进来的，
+// 抓取失败也只是少一个「跳过片头」按钮，绝不能让播放报错。
+//
+// 时间轴数据只来自 TheIntroDB。顺带在返回前起一次异步探测补齐媒体信息（主要是
+// STRM 媒体的时长），但探测结果不参与片段判定，详见 MediaProbeService 的说明。
+func (s *MediaSegmentService) ListForPlayback(ctx context.Context, m *model.Media) ([]model.MediaSegment, error) {
 	if s == nil || s.repo == nil || m == nil || m.ID == "" {
-		return SegmentsResult{}, nil
+		return nil, nil
 	}
-	source = NormalizeSegmentSource(source)
-	result := SegmentsResult{}
-	// 只用社区库时连探测都不该触发：没必要为一次用不上的章节提取去跑 ffprobe。
-	var chapterRows []model.MediaSegment
-	needsProbe := false
-	if source != SegmentSourceTheIntroDB {
-		chapterRows, needsProbe = s.chapterSegments(ctx, m)
-	}
-	result.Pending = needsProbe
-	// 用 defer 保证无论走哪条分支、包括中途出错，后台提取都会排上队；同时它一定在
-	// 所有前台数据库读写之后才启动（见 triggerAsyncProbe 的说明）。
-	defer triggerAsyncProbe(s, m, needsProbe)
-
-	if source == SegmentSourceTheIntroDB {
-		introRows, err := s.introDBSegments(ctx, m)
-		if err != nil {
-			return result, err
-		}
-		result.Segments = introRows
-		return result, nil
-	}
-	// ffprobe 档、以及 auto 档下已经有可用章节的情况，都整体采用章节数据。
-	//
-	// 章节与社区库的数据刻意不合并：两边对同一集的判定会互相矛盾（同一集的片尾
-	// 起点能差上百秒），只能按 media 整体二选一。auto 走到这里说明章节可用，也就
-	// 不必再去打一次用不上的社区库。
-	if source == SegmentSourceFFprobe || len(chapterRows) > 0 {
-		result.Segments = chapterRows
-		return result, nil
-	}
-	// auto 且没有可用章节：回落到社区库；Pending 保留，客户端会再拉一次。
-	introRows, err := s.introDBSegments(ctx, m)
-	if err != nil {
-		return result, err
-	}
-	result.Segments = introRows
-	return result, nil
+	// 用 defer 保证探测一定在本次请求所有数据库读写之后才启动：后台探测自己也要
+	// 写库，若在本次写事务还没结束时启动，两个写事务会抢同一把锁（SQLite 下就是
+	// SQLITE_BUSY，实测能直接把社区库的落库打失败）。
+	defer s.ensureMediaProbe(ctx, m)
+	return s.introDBSegments(ctx, m)
 }
 
-// triggerAsyncProbe 在所有前台数据库读写都结束之后再起后台提取。
+// ensureMediaProbe 在还没探过（或上次失败已过冷却期）时起一次异步探测。
 //
-// 顺序很关键：后台探测自己也要写库，若在本次请求的写事务还没结束时启动，两个写
-// 事务会抢同一把锁（SQLite 下就是 SQLITE_BUSY）。
-func triggerAsyncProbe(s *MediaSegmentService, m *model.Media, needsProbe bool) {
-	if !needsProbe || s == nil || s.probe == nil {
+// 它只为「补齐媒体信息」服务：失败只是拿不到时长，不影响播放，也不影响片段。
+func (s *MediaSegmentService) ensureMediaProbe(ctx context.Context, m *model.Media) {
+	if s == nil || s.probe == nil || m == nil {
+		return
+	}
+	cached, err := s.repo.MediaProbe.Get(ctx, m.ID)
+	if err != nil {
+		s.debug("get media probe failed", m.ID, err)
+		return
+	}
+	if mediaProbeSettled(cached) {
 		return
 	}
 	s.probe.EnsureAsync(m)
 }
 
-// ListForPlayback 供 Emby / Jellyfin 兼容接口使用：按 auto 档取数据（章节优先，
-// 回落社区库）。第三方客户端不会轮询，所以这里只返回当前能拿到的部分。
-func (s *MediaSegmentService) ListForPlayback(ctx context.Context, m *model.Media) ([]model.MediaSegment, error) {
-	result, err := s.SegmentsForPlayback(ctx, m, SegmentSourceAuto)
-	if err != nil {
-		return nil, err
-	}
-	return result.Segments, nil
-}
-
-// introDBSegments 读社区库的片段，缓存过期时按调用方的预算抓一次并落库。
-func (s *MediaSegmentService) introDBSegments(ctx context.Context, m *model.Media) ([]model.MediaSegment, error) {
-	cached, err := s.repo.MediaSegment.ListByMediaSource(ctx, m.ID, IntroDBSource)
-	if err != nil {
-		return nil, err
-	}
-	ledger, err := s.repo.MediaSegment.GetFetch(ctx, m.ID, IntroDBSource)
-	if err != nil {
-		return nil, err
-	}
-	if ledger != nil && ledgerFresh(ledger) {
-		return cached, nil
-	}
-	refreshed, attempted, err := s.refresh(ctx, m)
-	if err != nil {
-		// 社区库不可达或返回异常：沿用已有缓存，不影响播放。
-		logIntroDBFailure(s.log, 0, err)
-		return cached, nil
-	}
-	if !attempted {
-		return cached, nil
-	}
-	return refreshed, nil
-}
-
-// chapterSegments 读 ffprobe 提取出的章节区间，并报告「是否还需要等一次提取结果」。
-//
-// 它只读、不启动提取：调用方要等所有前台数据库读写都结束之后再起后台任务，否则
-// 后台写事务会和本次请求的写事务抢同一把锁。探测失败的结果也会落库，所以不会
-// 每次播放都为同一个坏源重跑。
-func (s *MediaSegmentService) chapterSegments(ctx context.Context, m *model.Media) ([]model.MediaSegment, bool) {
-	if s == nil || s.probe == nil || s.repo == nil {
-		return nil, false
-	}
-	rows, err := s.repo.MediaSegment.ListByMediaSource(ctx, m.ID, SegmentSourceFFprobe)
-	if err != nil {
-		s.debug("list ffprobe segments failed", m.ID, err)
-		return nil, false
-	}
-	cached, err := s.repo.MediaProbe.Get(ctx, m.ID)
-	if err != nil {
-		s.debug("get media probe failed", m.ID, err)
-		return nil, false
-	}
-	if mediaProbeSettled(cached) {
-		return rows, false
-	}
-	// 还没探过、或失败已过冷却期：值得让客户端稍后再来一次。
-	return rows, true
-}
-
 // mediaProbeSettled 判断这部媒体的探测是否已经「有结论」——成功过，或者失败但还在
-// 冷却期内。有结论就不必再探，客户端也不用继续轮询；失败且已过冷却期时返回
-// false，让下一次播放重试。
+// 冷却期内。有结论就不必再探；失败且已过冷却期时返回 false，让下一次播放重试。
 func mediaProbeSettled(row *model.MediaProbe) bool {
 	if row == nil {
 		return false
@@ -213,6 +147,76 @@ func mediaProbeSettled(row *model.MediaProbe) bool {
 	return time.Since(row.ProbedAt) < mediaProbeFailureRetry
 }
 
+// introDBSegments 读社区库的片段，缓存过期时按调用方的预算抓一次并落库。
+// 返回值是按来源优先级合并后的结果（manual > theintrodb > propagated）。
+func (s *MediaSegmentService) introDBSegments(ctx context.Context, m *model.Media) ([]model.MediaSegment, error) {
+	ledger, err := s.repo.MediaSegment.GetFetch(ctx, m.ID, IntroDBSource)
+	if err != nil {
+		// 调用方预算耗尽时仍读本地缓存，绝不能让播放接口报错。
+		if ctx.Err() != nil {
+			return s.mergeForPlayback(context.WithoutCancel(ctx), m.ID)
+		}
+		return nil, err
+	}
+	if ledger == nil || !ledgerFresh(ledger) {
+		if _, _, err := s.refresh(ctx, m); err != nil {
+			// 社区库不可达或返回异常：沿用已有缓存，不影响播放；也不写负缓存。
+			logIntroDBFailure(s.log, 0, err)
+		}
+	}
+	// 合并读库只碰本地，脱离调用方 deadline，避免外网抓取耗尽预算后读缓存也失败。
+	return s.mergeForPlayback(context.WithoutCancel(ctx), m.ID)
+}
+
+// mergeForPlayback 合并同一媒体上多来源片段。同 kind 只保留优先级最高的来源。
+func (s *MediaSegmentService) mergeForPlayback(ctx context.Context, mediaID string) ([]model.MediaSegment, error) {
+	rows, err := s.repo.MediaSegment.ListByMedia(ctx, mediaID)
+	if err != nil {
+		return nil, err
+	}
+	return preferSegmentsBySource(rows), nil
+}
+
+// segmentSourcePriority 数值越大越优先。未知来源视为最低，避免挡住已知源。
+func segmentSourcePriority(source string) int {
+	switch source {
+	case SegmentSourceManual:
+		return 3
+	case IntroDBSource:
+		return 2
+	case SegmentSourcePropagated:
+		return 1
+	default:
+		return 0
+	}
+}
+
+// preferSegmentsBySource 按 kind 选取最高优先级来源的全部区间。
+func preferSegmentsBySource(rows []model.MediaSegment) []model.MediaSegment {
+	bestPri := make(map[string]int, 4)
+	byKind := make(map[string][]model.MediaSegment, 4)
+	for _, row := range rows {
+		pri := segmentSourcePriority(row.Source)
+		cur, seen := bestPri[row.Kind]
+		if !seen || pri > cur {
+			bestPri[row.Kind] = pri
+			byKind[row.Kind] = []model.MediaSegment{row}
+			continue
+		}
+		if pri == cur {
+			byKind[row.Kind] = append(byKind[row.Kind], row)
+		}
+	}
+	out := make([]model.MediaSegment, 0, len(rows))
+	for _, kind := range []string{
+		model.SegmentKindIntro, model.SegmentKindRecap,
+		model.SegmentKindCredits, model.SegmentKindPreview,
+	} {
+		out = append(out, byKind[kind]...)
+	}
+	return out
+}
+
 func (s *MediaSegmentService) debug(message, mediaID string, err error) {
 	if s == nil || s.log == nil {
 		return
@@ -278,9 +282,111 @@ func (s *MediaSegmentService) refresh(ctx context.Context, m *model.Media) ([]mo
 	}); err != nil {
 		return nil, true, err
 	}
+	s.propagateIntroToSeason(fetchCtx, m, rows)
 	return rows, true, nil
 }
 
+// propagateIntroToSeason 把本集 IntroDB 命中的 intro 复制到同季还没有
+// theintrodb intro 的兄弟集。片尾/预告不传播：各集时长与片尾位置经常不同。
+func (s *MediaSegmentService) propagateIntroToSeason(ctx context.Context, m *model.Media, rows []model.MediaSegment) {
+	if s == nil || s.repo == nil || m == nil || m.SeasonNum <= 0 {
+		return
+	}
+	intros := introSpansFrom(rows)
+	if len(intros) == 0 {
+		return
+	}
+	siblings, err := s.repo.Media.ListSeasonSiblings(ctx, m)
+	if err != nil {
+		s.debug("list season siblings failed", m.ID, err)
+		return
+	}
+	for i := range siblings {
+		sib := &siblings[i]
+		existing, err := s.repo.MediaSegment.ListByMediaSource(ctx, sib.ID, IntroDBSource)
+		if err != nil {
+			s.debug("list sibling introdb segments failed", sib.ID, err)
+			continue
+		}
+		if hasSegmentKind(existing, model.SegmentKindIntro) {
+			continue
+		}
+		copied := make([]model.MediaSegment, 0, len(intros))
+		for _, intro := range intros {
+			copied = append(copied, model.MediaSegment{
+				MediaID:  sib.ID,
+				SeriesID: sib.SeriesID,
+				Kind:     model.SegmentKindIntro,
+				StartMs:  intro.StartMs,
+				EndMs:    intro.EndMs,
+				Source:   SegmentSourcePropagated,
+			})
+		}
+		if err := s.repo.MediaSegment.ReplaceForMedia(ctx, sib.ID, SegmentSourcePropagated, copied); err != nil {
+			s.debug("propagate intro failed", sib.ID, err)
+		}
+	}
+}
+
+func introSpansFrom(rows []model.MediaSegment) []model.MediaSegment {
+	out := make([]model.MediaSegment, 0, 1)
+	for _, row := range rows {
+		if row.Kind == model.SegmentKindIntro {
+			out = append(out, row)
+		}
+	}
+	return out
+}
+
+func hasSegmentKind(rows []model.MediaSegment, kind string) bool {
+	for _, row := range rows {
+		if row.Kind == kind {
+			return true
+		}
+	}
+	return false
+}
+
+// Prewarm 批量向 TheIntroDB 补齐过期/缺失账本的可查询媒体。返回实际发起过查询的数量。
+func (s *MediaSegmentService) Prewarm(ctx context.Context, limit int) (int, error) {
+	if s == nil || s.repo == nil || s.introdb == nil {
+		return 0, nil
+	}
+	if limit <= 0 {
+		limit = segmentPrewarmDefaultLimit
+	}
+	now := time.Now()
+	if s.now != nil {
+		now = s.now()
+	}
+	candidates, err := s.repo.MediaSegment.ListPrewarmCandidates(
+		ctx, IntroDBSource, now.Add(-segmentMissingTTL), now.Add(-segmentFoundTTL), limit,
+	)
+	if err != nil {
+		return 0, err
+	}
+	attempted := 0
+	for i := range candidates {
+		if err := ctx.Err(); err != nil {
+			return attempted, err
+		}
+		m := &candidates[i]
+		_, did, err := s.refresh(ctx, m)
+		if err != nil {
+			logIntroDBFailure(s.log, m.TMDbID, err)
+		}
+		if did {
+			attempted++
+		}
+		if i+1 < len(candidates) && s.prewarmGap > 0 {
+			if !waitForIntroDBRetry(ctx, s.prewarmGap) {
+				return attempted, ctx.Err()
+			}
+		}
+	}
+	return attempted, nil
+}
+
 // queryIDs resolves the provider query key. Movies use their own TMDb id.
 //
 // 剧集需要「剧集级」TMDb id 加季/集。优先取 Series.TMDbID；但有些刮削路径

internal/service/media_segment_probe_test.go

@@ -0,0 +1,77 @@
+package service
+
+import (
+	"testing"
+	"time"
+
+	"go.uber.org/zap"
+)
+
+// 播放请求要顺带把媒体信息（主要是 STRM 媒体的时长）补齐，但探测不能影响片段：
+// ListForPlayback 只读社区库，探测在返回前才异步排上队。
+func TestListForPlaybackTriggersMediaProbe(t *testing.T) {
+	probeSvc, repos, m := newProbeFixture(t)
+	prober := &stubProber{result: chapterProbeResult()}
+	probeSvc.probe = prober
+
+	segments := NewMediaSegmentService(zap.NewNop(), repos).SetProbe(probeSvc)
+
+	rows, err := segments.ListForPlayback(t.Context(), m)
+	if err != nil {
+		t.Fatalf("ListForPlayback: %v", err)
+	}
+	if len(rows) != 0 {
+		t.Fatalf("rows = %#v, want none without a provider", rows)
+	}
+
+	// 探测是异步的：等它跑完并落库。
+	waitForCondition(t, 5*time.Second, func() bool { return prober.callCount() >= 1 })
+	probeRow, err := repos.MediaProbe.Get(t.Context(), m.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if probeRow == nil {
+		t.Fatal("the playback path should have probed the media info")
+	}
+
+	// 已经有结论的媒体不该被反复探测：每次播放重跑一次 2～4.5 秒的远端读取太贵。
+	if _, err := segments.ListForPlayback(t.Context(), m); err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(50 * time.Millisecond)
+	if got := prober.callCount(); got != 1 {
+		t.Fatalf("probe calls = %d, want 1 (a settled probe must not repeat)", got)
+	}
+}
+
+// 探测失败也要有结论：冷却期内不再重探。
+func TestListForPlaybackDoesNotReprobeWithinFailureCooldown(t *testing.T) {
+	probeSvc, repos, m := newProbeFixture(t)
+	prober := &stubProber{result: chapterProbeResult()}
+	probeSvc.probe = prober
+	if err := repos.MediaProbe.MarkFailure(t.Context(), m.ID, "boom", time.Now()); err != nil {
+		t.Fatal(err)
+	}
+
+	segments := NewMediaSegmentService(zap.NewNop(), repos).SetProbe(probeSvc)
+	if _, err := segments.ListForPlayback(t.Context(), m); err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(50 * time.Millisecond)
+	if got := prober.callCount(); got != 0 {
+		t.Fatalf("probe calls = %d, want 0 inside the cooldown", got)
+	}
+}
+
+// 没注入探测服务时（ffprobe 不可用的精简部署）播放链路必须照常工作。
+func TestListForPlaybackWithoutProbeStillWorks(t *testing.T) {
+	_, repos, m := newProbeFixture(t)
+	segments := NewMediaSegmentService(zap.NewNop(), repos)
+	rows, err := segments.ListForPlayback(t.Context(), m)
+	if err != nil {
+		t.Fatalf("ListForPlayback: %v", err)
+	}
+	if len(rows) != 0 {
+		t.Fatalf("rows = %#v, want none", rows)
+	}
+}

internal/service/media_segment_source_test.go

@@ -1,223 +0,0 @@
-package service
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"os"
-	"path/filepath"
-	"sync/atomic"
-	"testing"
-	"time"
-
-	"go.uber.org/zap"
-
-	"github.com/truewhile/MeBox/internal/model"
-	"github.com/truewhile/MeBox/internal/repository"
-)
-
-// segmentSourceFixture 提供一个带社区库假服务端、可选探测桩、以及一条已有本地
-// 文件的媒体行，用来验证「数据来源选择」这一层。
-type segmentSourceFixture struct {
-	svc    *MediaSegmentService
-	repos  *repository.Container
-	calls  *int32
-	prober *stubProber
-	media  *model.Media
-}
-
-func newSegmentSourceFixture(t *testing.T, prober *stubProber) *segmentSourceFixture {
-	t.Helper()
-	repos := repository.New(newServiceTestDB(t))
-	var calls int32
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
-		atomic.AddInt32(&calls, 1)
-		w.Header().Set("Content-Type", "application/json")
-		_, _ = w.Write([]byte(introDBMoviePayload))
-	}))
-	t.Cleanup(server.Close)
-
-	svc := NewMediaSegmentService(zap.NewNop(), repos).
-		SetIntroDB(NewIntroDBService(zap.NewNop()).SetBaseURL(server.URL).SetRetryDelay(0))
-
-	dir := t.TempDir()
-	path := filepath.Join(dir, "inception.mkv")
-	if err := os.WriteFile(path, []byte("data"), 0o600); err != nil {
-		t.Fatal(err)
-	}
-	m := &model.Media{Base: model.Base{ID: "mv-1"}, Title: "盗梦空间", Path: path, TMDbID: 27205}
-	if err := repos.DB.Create(m).Error; err != nil {
-		t.Fatal(err)
-	}
-
-	if prober != nil {
-		probeSvc := NewMediaProbeService(zap.NewNop(), repos, nil)
-		probeSvc.probe = prober
-		svc.SetProbe(probeSvc)
-	}
-	return &segmentSourceFixture{svc: svc, repos: repos, calls: &calls, prober: prober, media: m}
-}
-
-// seedChapters 模拟「已经提取过并且拿到了章节」：写入章节区间 + 探测行（探测行
-// 是「已经探过」的标记，客户端靠它停止轮询）。
-func (f *segmentSourceFixture) seedChapters(t *testing.T, rows ...model.MediaSegment) {
-	t.Helper()
-	seeded := make([]model.MediaSegment, 0, len(rows))
-	for _, row := range rows {
-		row.MediaID = f.media.ID
-		row.Source = SegmentSourceFFprobe
-		seeded = append(seeded, row)
-	}
-	if err := f.repos.MediaSegment.ReplaceForMedia(t.Context(), f.media.ID, SegmentSourceFFprobe, seeded); err != nil {
-		t.Fatal(err)
-	}
-	if err := f.repos.MediaProbe.Upsert(t.Context(), &model.MediaProbe{
-		MediaID:      f.media.ID,
-		ProbedAt:     time.Now(),
-		ChapterCount: len(seeded),
-	}); err != nil {
-		t.Fatal(err)
-	}
-}
-
-func chapterIntroRow() model.MediaSegment {
-	return model.MediaSegment{Kind: model.SegmentKindIntro, StartMs: 228_664, EndMs: 246_143}
-}
-
-// auto 档在有章节时必须整体采用章节，并且不打社区库。
-func TestSegmentsForPlaybackAutoPrefersChapters(t *testing.T) {
-	f := newSegmentSourceFixture(t, &stubProber{result: chapterProbeResult()})
-	f.seedChapters(t, chapterIntroRow())
-
-	for _, source := range []string{SegmentSourceAuto, SegmentSourceFFprobe, "未知值"} {
-		result, err := f.svc.SegmentsForPlayback(t.Context(), f.media, source)
-		if err != nil {
-			t.Fatalf("source %q: %v", source, err)
-		}
-		if len(result.Segments) != 1 || result.Segments[0].StartMs != 228_664 {
-			t.Fatalf("source %q segments = %#v, want the chapter row", source, result.Segments)
-		}
-		if result.Segments[0].Source != SegmentSourceFFprobe {
-			t.Fatalf("source %q returned a %q row", source, result.Segments[0].Source)
-		}
-		if result.Pending {
-			t.Fatalf("source %q reported pending although the probe is cached", source)
-		}
-	}
-	if got := atomic.LoadInt32(f.calls); got != 0 {
-		t.Fatalf("provider calls = %d, want 0: chapters must not trigger TheIntroDB", got)
-	}
-}
-
-// theintrodb 档必须忽略章节，并且不触发任何探测。
-func TestSegmentsForPlaybackIntroDBOnlyIgnoresChapters(t *testing.T) {
-	prober := &stubProber{result: chapterProbeResult()}
-	f := newSegmentSourceFixture(t, prober)
-	f.seedChapters(t, chapterIntroRow())
-
-	result, err := f.svc.SegmentsForPlayback(t.Context(), f.media, SegmentSourceTheIntroDB)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(result.Segments) != 1 || result.Segments[0].Source != IntroDBSource {
-		t.Fatalf("segments = %#v, want the community row", result.Segments)
-	}
-	if result.Segments[0].StartMs != 0 || result.Segments[0].EndMs != 38_000 {
-		t.Fatalf("segments = %#v, want the movie intro from the provider", result.Segments)
-	}
-	if result.Pending {
-		t.Fatal("theintrodb-only must never report pending")
-	}
-	// 只用社区库时不该为一次用不上的章节提取去跑 3 秒 ffprobe。
-	if got := prober.callCount(); got != 0 {
-		t.Fatalf("probe calls = %d, want 0", got)
-	}
-}
-
-// auto 档没有章节时回落到社区库，同时告诉客户端「章节还在提取」。
-func TestSegmentsForPlaybackAutoFallsBackAndReportsPending(t *testing.T) {
-	prober := &stubProber{result: chapterProbeResult()}
-	f := newSegmentSourceFixture(t, prober)
-
-	result, err := f.svc.SegmentsForPlayback(t.Context(), f.media, SegmentSourceAuto)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(result.Segments) != 1 || result.Segments[0].Source != IntroDBSource {
-		t.Fatalf("segments = %#v, want the community fallback", result.Segments)
-	}
-	if !result.Pending {
-		t.Fatal("auto without chapters must report that a probe is running")
-	}
-	// 异步提取确实排上了队（这里只验证调度；落库由 media_probe_test.go 覆盖）。
-	waitForCondition(t, 5*time.Second, func() bool { return prober.callCount() >= 1 })
-}
-
-// ffprobe 档没有章节数据时返回空，但会起一次提取并报告 pending。
-func TestSegmentsForPlaybackFFprobeOnlyReturnsEmptyWhilePending(t *testing.T) {
-	prober := &stubProber{result: chapterProbeResult()}
-	f := newSegmentSourceFixture(t, prober)
-
-	result, err := f.svc.SegmentsForPlayback(t.Context(), f.media, SegmentSourceFFprobe)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(result.Segments) != 0 {
-		t.Fatalf("segments = %#v, want none before extraction finishes", result.Segments)
-	}
-	if !result.Pending {
-		t.Fatal("ffprobe-only must report pending while the extraction runs")
-	}
-	if got := atomic.LoadInt32(f.calls); got != 0 {
-		t.Fatalf("provider calls = %d, want 0", got)
-	}
-}
-
-// 提取失败也要有个结果：不能在每次播放时无限重试，客户端也不该一直轮询。
-func TestSegmentsForPlaybackStopsPendingAfterFailedProbe(t *testing.T) {
-	prober := &stubProber{result: chapterProbeResult()}
-	f := newSegmentSourceFixture(t, prober)
-	if err := f.repos.MediaProbe.MarkFailure(t.Context(), f.media.ID, "probe exploded", time.Now()); err != nil {
-		t.Fatal(err)
-	}
-
-	result, err := f.svc.SegmentsForPlayback(t.Context(), f.media, SegmentSourceFFprobe)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.Pending {
-		t.Fatal("a recent failure must stop the client from polling")
-	}
-	if got := prober.callCount(); got != 0 {
-		t.Fatalf("probe calls = %d, want 0 inside the failure cooldown", got)
-	}
-}
-
-// 没有注入探测服务时（ffprobe 不可用的精简部署）不能谎报 pending。
-func TestSegmentsForPlaybackWithoutProbeNeverReportsPending(t *testing.T) {
-	f := newSegmentSourceFixture(t, nil)
-
-	result, err := f.svc.SegmentsForPlayback(t.Context(), f.media, SegmentSourceFFprobe)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.Pending {
-		t.Fatal("pending must be false when no prober is wired")
-	}
-	if len(result.Segments) != 0 {
-		t.Fatalf("segments = %#v, want none", result.Segments)
-	}
-}
-
-// ListForPlayback 仍供 Emby / Jellyfin 兼容接口使用，按 auto 档取数。
-func TestListForPlaybackUsesAutoSelection(t *testing.T) {
-	f := newSegmentSourceFixture(t, &stubProber{result: chapterProbeResult()})
-	f.seedChapters(t, chapterIntroRow())
-
-	rows, err := f.svc.ListForPlayback(t.Context(), f.media)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(rows) != 1 || rows[0].Source != SegmentSourceFFprobe {
-		t.Fatalf("rows = %#v, want the chapter row via auto", rows)
-	}
-}

internal/service/media_segment_test.go

@@ -385,6 +385,123 @@ func TestListForPlaybackRespectsCallerDeadline(t *testing.T) {
 	}
 }
 
+func TestPreferSegmentsBySourcePrefersManualThenIntroDBThenPropagated(t *testing.T) {
+	rows := []model.MediaSegment{
+		{Kind: model.SegmentKindIntro, StartMs: 1, EndMs: 2, Source: SegmentSourcePropagated},
+		{Kind: model.SegmentKindIntro, StartMs: 10, EndMs: 20, Source: IntroDBSource},
+		{Kind: model.SegmentKindIntro, StartMs: 100, EndMs: 200, Source: SegmentSourceManual},
+		{Kind: model.SegmentKindCredits, StartMs: 1000, EndMs: 0, Source: SegmentSourcePropagated},
+		{Kind: model.SegmentKindCredits, StartMs: 2000, EndMs: 0, Source: IntroDBSource},
+	}
+	got := preferSegmentsBySource(rows)
+	if len(got) != 2 {
+		t.Fatalf("got %#v, want manual intro + introdb credits", got)
+	}
+	if got[0].Source != SegmentSourceManual || got[0].StartMs != 100 {
+		t.Fatalf("intro = %#v, want manual", got[0])
+	}
+	if got[1].Source != IntroDBSource || got[1].StartMs != 2000 {
+		t.Fatalf("credits = %#v, want theintrodb", got[1])
+	}
+}
+
+func TestListForPlaybackPropagatesIntroToSeasonSiblings(t *testing.T) {
+	svc, repos, _ := newSegmentServiceFixture(t, writeJSONBody(introDBTVPayload))
+	svc.SetPrewarmGap(0)
+	ctx := t.Context()
+	episodes := []*model.Media{
+		{Base: model.Base{ID: "ep-1"}, LibraryID: "lib-anime", Title: "便·当",
+			Path: "/anime/S01E01.mkv", SeasonNum: 1, EpisodeNum: 1, TMDbID: 61970},
+		{Base: model.Base{ID: "ep-2"}, LibraryID: "lib-anime", Title: "便·当",
+			Path: "/anime/S01E02.mkv", SeasonNum: 1, EpisodeNum: 2, TMDbID: 61970},
+	}
+	for _, ep := range episodes {
+		if err := repos.DB.Create(ep).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	rows, err := svc.ListForPlayback(ctx, episodes[0])
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(rows) != 2 {
+		t.Fatalf("ep1 rows = %#v, want intro+credits from provider", rows)
+	}
+
+	sib, err := repos.MediaSegment.ListByMediaSource(ctx, "ep-2", SegmentSourcePropagated)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(sib) != 1 || sib[0].Kind != model.SegmentKindIntro {
+		t.Fatalf("sibling propagated = %#v, want intro only", sib)
+	}
+	if sib[0].StartMs != 228_664 || sib[0].EndMs != 246_143 {
+		t.Fatalf("propagated window = %#v", sib[0])
+	}
+
+	// 兄弟集播放时应直接看到传播来的 intro（即使自己还没打过 IntroDB）。
+	if err := repos.MediaSegment.UpsertFetch(ctx, &model.MediaSegmentFetch{
+		MediaID: "ep-2", Source: IntroDBSource, FetchedAt: time.Now(), Found: false,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	merged, err := svc.ListForPlayback(ctx, episodes[1])
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(merged) != 1 || merged[0].Kind != model.SegmentKindIntro || merged[0].Source != SegmentSourcePropagated {
+		t.Fatalf("ep2 playback = %#v, want propagated intro", merged)
+	}
+}
+
+func TestPrewarmFetchesStaleMissesPreferringRecentPlays(t *testing.T) {
+	svc, repos, calls := newSegmentServiceFixture(t, writeJSONBody(introDBMoviePayload))
+	svc.SetPrewarmGap(0)
+	ctx := t.Context()
+
+	old := &model.Media{Base: model.Base{ID: "mv-old"}, Path: "/a.mkv", TMDbID: 111}
+	hot := &model.Media{Base: model.Base{ID: "mv-hot"}, Path: "/b.mkv", TMDbID: 27205}
+	for _, m := range []*model.Media{old, hot} {
+		if err := repos.DB.Create(m).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+	// 两条都是过期 miss，热播的应优先被预热。
+	stale := time.Now().Add(-segmentMissingTTL - time.Hour)
+	for _, id := range []string{"mv-old", "mv-hot"} {
+		if err := repos.MediaSegment.UpsertFetch(ctx, &model.MediaSegmentFetch{
+			MediaID: id, Source: IntroDBSource, FetchedAt: stale, Found: false,
+		}); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := repos.DB.Create(&model.PlaybackHistory{
+		Base: model.Base{ID: "h-1"}, UserID: "u1", MediaID: "mv-hot",
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	n, err := svc.Prewarm(ctx, 1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 1 {
+		t.Fatalf("attempted = %d, want 1", n)
+	}
+	if got := atomic.LoadInt32(calls); got != 1 {
+		t.Fatalf("provider calls = %d, want 1", got)
+	}
+	ledger, err := repos.MediaSegment.GetFetch(ctx, "mv-hot", IntroDBSource)
+	if err != nil || ledger == nil || !ledger.Found {
+		t.Fatalf("hot ledger = %#v err=%v, want found", ledger, err)
+	}
+	oldLedger, err := repos.MediaSegment.GetFetch(ctx, "mv-old", IntroDBSource)
+	if err != nil || oldLedger == nil || oldLedger.Found {
+		t.Fatalf("old ledger should remain a miss, got %#v err=%v", oldLedger, err)
+	}
+}
+
 func TestLedgerFreshUsesLongerTTLWhenDataWasFound(t *testing.T) {
 	now := time.Now()
 	found := &model.MediaSegmentFetch{FetchedAt: now.Add(-segmentMissingTTL), Found: true}
@@ -399,3 +516,4 @@ func TestLedgerFreshUsesLongerTTLWhenDataWasFound(t *testing.T) {
 		t.Fatal("a missing ledger must not be considered fresh")
 	}
 }
+

internal/service/play_profile.go

@@ -94,7 +94,6 @@ func (s *PlayProfileService) Create(ctx context.Context, in PlayProfileInput) (*
 		PreferredAudioLang:    in.PreferredAudioLang,
 		AutoplayNext:          in.AutoplayNext,
 		SkipIntro:             in.SkipIntro,
-		SegmentSource:         NormalizeSegmentSource(in.SegmentSource),
 		AllowedLibraryIDs:     string(libsBlob),
 	}
 	if in.RequirePIN && in.PIN != "" {
@@ -154,7 +153,6 @@ func (s *PlayProfileService) updateExisting(ctx context.Context, row *model.Play
 		"preferred_audio_lang":    in.PreferredAudioLang,
 		"autoplay_next":           in.AutoplayNext,
 		"skip_intro":              in.SkipIntro,
-		"segment_source":          NormalizeSegmentSource(in.SegmentSource),
 		"allowed_library_ids":     string(libsBlob),
 	}
 	if in.RequirePIN && in.PIN != "" {

internal/service/play_profile_model.go

@@ -13,20 +13,18 @@ import (
 // PlayProfileInput is the create/update payload accepted by the API.
 // PIN is hashed only when non-empty so omitting it preserves the existing PIN on update.
 type PlayProfileInput struct {
-	UserID                string `json:"user_id"`
-	Name                  string `json:"name"`
-	IsDefault             bool   `json:"is_default"`
-	ContentRatingLimit    string `json:"content_rating_limit"`
-	AllowAdult            bool   `json:"allow_adult"`
-	RequirePIN            bool   `json:"require_pin"`
-	PIN                   string `json:"pin,omitempty"`
-	PreferredSubtitleLang string `json:"preferred_subtitle_lang"`
-	PreferredAudioLang    string `json:"preferred_audio_lang"`
-	AutoplayNext          bool   `json:"autoplay_next"`
-	SkipIntro             bool   `json:"skip_intro"`
-	// SegmentSource 是片头/片尾数据来源：auto | theintrodb | ffprobe。
-	SegmentSource     string   `json:"segment_source"`
-	AllowedLibraryIDs []string `json:"allowed_library_ids"`
+	UserID                string   `json:"user_id"`
+	Name                  string   `json:"name"`
+	IsDefault             bool     `json:"is_default"`
+	ContentRatingLimit    string   `json:"content_rating_limit"`
+	AllowAdult            bool     `json:"allow_adult"`
+	RequirePIN            bool     `json:"require_pin"`
+	PIN                   string   `json:"pin,omitempty"`
+	PreferredSubtitleLang string   `json:"preferred_subtitle_lang"`
+	PreferredAudioLang    string   `json:"preferred_audio_lang"`
+	AutoplayNext          bool     `json:"autoplay_next"`
+	SkipIntro             bool     `json:"skip_intro"`
+	AllowedLibraryIDs     []string `json:"allowed_library_ids"`
 }
 
 // ProfileView is the public shape for React forms.

internal/service/scheduler.go

@@ -8,6 +8,7 @@
 //	organize_source   opt-in        — organize the configured staging folder.
 //	transcode_cleanup every 24 h   — purge HLS transcode artefacts
 //	                                  older than 24 h.
+//	segment_prewarm   every 6 h    — fill IntroDB skip segments for queryable media.
 //
 // Each job runs at most once at a time (an in-flight run blocks the
 // next tick). All work happens on a long-lived background context so
@@ -42,6 +43,8 @@ type SchedulerService struct {
 
 	imagesPolicyProvider func() ImageCachePolicy
 
+	segments *MediaSegmentService
+
 	mu     sync.Mutex
 	stopCh chan struct{}
 	jobs   []*scheduledJob
@@ -145,6 +148,14 @@ func (s *SchedulerService) Start(ctx context.Context) {
 			run:      s.jobCleanImageCache,
 		},
 	}
+	// 片头预热只在注入了 Segments 时注册，避免测试跑无转外网任务。
+	if s.segments != nil {
+		s.jobs = append(s.jobs, &scheduledJob{
+			name:     "segment_prewarm",
+			interval: segmentPrewarmJobInterval,
+			run:      s.jobSegmentPrewarm,
+		})
+	}
 	// 到期提醒只在配置了巡检器时注册，避免测试与未启用通知的部署跑空转任务。
 	if s.expiryWatcher != nil {
 		s.jobs = append(s.jobs, &scheduledJob{
@@ -155,8 +166,8 @@ func (s *SchedulerService) Start(ctx context.Context) {
 	}
 	for _, j := range s.jobs {
 		initialDelay := 15 * time.Second
-		if j.name == "library_scan" || j.name == "organize_source" {
-			// 重启后不立即整库重扫/整理下载目录：更新窗口恰是登录高峰，
+		if j.name == "library_scan" || j.name == "organize_source" || j.name == "segment_prewarm" {
+			// 重启后不立即整库重扫/整理/预热：更新窗口恰是登录高峰，
 			// 15 秒即全量 walk + ffprobe 曾把 CPU/磁盘打满导致无法登录。
 			// 首轮等满一个完整周期再跑，平时节奏不变。
 			initialDelay = j.interval

internal/service/scheduler_segment_jobs.go

@@ -0,0 +1,52 @@
+package service
+
+import (
+	"context"
+	"time"
+
+	"go.uber.org/zap"
+)
+
+const (
+	segmentPrewarmJobInterval = 6 * time.Hour
+	// SegmentPrewarmEnabledKey 控制是否后台预热 TheIntroDB 片段；默认关闭。
+	SegmentPrewarmEnabledKey = "segment.prewarm_enabled"
+)
+
+// SetSegments wires the IntroDB prewarm job. Without it the job is not registered.
+func (s *SchedulerService) SetSegments(segments *MediaSegmentService) {
+	if s != nil {
+		s.segments = segments
+	}
+}
+
+func (s *SchedulerService) jobSegmentPrewarm(ctx context.Context) error {
+	if s == nil || s.segments == nil {
+		return nil
+	}
+	manual, _ := ctx.Value(schedulerManualRunKey{}).(bool)
+	if !manual && !s.segmentPrewarmEnabled(ctx) {
+		return nil
+	}
+	n, err := s.segments.Prewarm(ctx, segmentPrewarmDefaultLimit)
+	if s.log != nil {
+		s.log.Info("segment prewarm finished",
+			zap.Int("attempted", n),
+			zap.Error(err),
+		)
+	}
+	return err
+}
+
+// segmentPrewarmEnabled reports whether the operator opted into background
+// IntroDB prewarm. Defaults to false so playback-on-demand remains the only path.
+func (s *SchedulerService) segmentPrewarmEnabled(ctx context.Context) bool {
+	if s.repo == nil || s.repo.Setting == nil {
+		return false
+	}
+	v, err := s.repo.Setting.Get(ctx, SegmentPrewarmEnabledKey)
+	if err != nil {
+		return false
+	}
+	return parseBoolSetting(v, false)
+}

internal/service/scheduler_segment_jobs_test.go

@@ -0,0 +1,60 @@
+package service
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+
+	"go.uber.org/zap"
+
+	"github.com/truewhile/MeBox/internal/model"
+	"github.com/truewhile/MeBox/internal/repository"
+)
+
+func TestSegmentPrewarmDefaultsOff(t *testing.T) {
+	repos := repository.New(newServiceTestDB(t, &model.Setting{}))
+	scheduler := NewSchedulerService(zap.NewNop(), repos, nil, nil, nil, nil, "")
+	if scheduler.segmentPrewarmEnabled(t.Context()) {
+		t.Fatal("prewarm must default to off")
+	}
+}
+
+func TestJobSegmentPrewarmSkippedWhenDisabled(t *testing.T) {
+	var calls int32
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		atomic.AddInt32(&calls, 1)
+		w.WriteHeader(http.StatusNotFound)
+	}))
+	t.Cleanup(server.Close)
+
+	repos := repository.New(newServiceTestDB(t))
+	if err := repos.DB.Create(&model.Media{
+		Base: model.Base{ID: "mv-1"}, Path: "/a.mkv", TMDbID: 1,
+	}).Error; err != nil {
+		t.Fatal(err)
+	}
+	segments := NewMediaSegmentService(zap.NewNop(), repos).
+		SetIntroDB(NewIntroDBService(zap.NewNop()).SetBaseURL(server.URL)).
+		SetPrewarmGap(0)
+	scheduler := NewSchedulerService(zap.NewNop(), repos, nil, nil, nil, nil, "")
+	scheduler.SetSegments(segments)
+
+	if err := scheduler.jobSegmentPrewarm(t.Context()); err != nil {
+		t.Fatal(err)
+	}
+	if got := atomic.LoadInt32(&calls); got != 0 {
+		t.Fatalf("provider calls = %d, want 0 when prewarm is disabled", got)
+	}
+
+	if err := repos.Setting.Set(t.Context(), SegmentPrewarmEnabledKey, "true"); err != nil {
+		t.Fatal(err)
+	}
+	if err := scheduler.jobSegmentPrewarm(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+	if got := atomic.LoadInt32(&calls); got != 1 {
+		t.Fatalf("provider calls = %d, want 1 after enabling prewarm", got)
+	}
+}

internal/service/service_builder.go

@@ -192,6 +192,7 @@ func (b *serviceContainerBuilder) initAccessAndStorageServices() {
 	)
 	b.c.Scheduler.SetTaskTracker(b.c.Tasks)
 	b.c.Scheduler.SetOrganizePipeline(b.c.OrganizePipeline)
+	b.c.Scheduler.SetSegments(b.c.Segments)
 	b.c.Scheduler.SetImageCachePolicyProvider(func() ImageCachePolicy {
 		if b.cfg == nil {
 			return ImageCachePolicy{}

web/src/api/danmaku.ts

@@ -71,7 +71,6 @@ export interface DanmakuConfig {
   font_size: string
   area: string
   volume: number
-  playback_rate: number
   /** 当前用户是否已经看过 VR 全景播放的首次操作说明（按用户存储）。 */
   vr360_guide_seen: boolean
   /** Per-user preference: merge the same episode's multiple sources. */
@@ -90,7 +89,6 @@ export interface DanmakuSettingsPatch {
   area?: number
   merge_sources?: boolean
   volume?: number
-  playback_rate?: number
   /** 看过 VR 操作说明后置为 true，之后不再弹出。 */
   vr360_guide_seen?: boolean
 }

web/src/api/play_profiles.ts

@@ -1,5 +1,5 @@
 import { api } from './client'
-import type { PlayProfile, SegmentSource } from '../types'
+import type { PlayProfile } from '../types'
 
 // Payload accepted by create / update.
 export interface PlayProfileInput {
@@ -14,7 +14,6 @@ export interface PlayProfileInput {
   preferred_audio_lang?: string
   autoplay_next: boolean
   skip_intro: boolean
-  segment_source: SegmentSource
   allowed_library_ids: string[]
 }
 

web/src/components/ExternalPlayerButton.tsx

@@ -52,7 +52,7 @@ export function ExternalPlayerButton({
         className={
           compact
             ? 'shrink-0 inline-flex items-center rounded-lg border border-primary-400/35 bg-white px-2 py-1 text-xs font-semibold text-brand-500 hover:bg-primary-400/10 disabled:opacity-50 transition-colors whitespace-nowrap'
-            : 'btn-outline border-brand-500/30 px-5 text-[#c9954a] hover:border-brand-500 hover:bg-brand-50'
+            : 'btn-outline h-11 border-brand-500/30 px-5 text-[#c9954a] hover:border-brand-500 hover:bg-brand-50'
         }
       >
         <PlaySquare size={compact ? 13 : 14} className="mr-1 inline" />

web/src/components/PlayerControls.tsx

@@ -133,10 +133,9 @@ type PlayerControlsProps = {
   volume?: number
   onVolumeChange?: (volume: number) => void
   onVolumeCommit?: (volume: number) => void
-  /** 用户级播放倍速，由播放页从数据库读取。 */
+  /** 播放倍速（1x = 原速）。只作用于当前视频，不落库。 */
   playbackRate?: number
   onPlaybackRateChange?: (rate: number) => void
-  onPlaybackRateCommit?: (rate: number) => void
   uiVisible: boolean
   onUiVisibleChange: (visible: boolean) => void
   /** 外部浮层（VR 工具条/设置面板）正被鼠标悬停：此时控制栏不自动隐藏。 */
@@ -213,7 +212,6 @@ export function PlayerControls({
   onVolumeCommit,
   playbackRate: playbackRateProp = 1,
   onPlaybackRateChange,
-  onPlaybackRateCommit,
   uiVisible,
   onUiVisibleChange,
   uiHold = false,
@@ -381,7 +379,7 @@ export function PlayerControls({
     setMuted(next === 0)
   }, [video, volumeProp])
 
-  // 倍速由播放页按用户持久化；配置加载、切换剧集或切换播放源后同步到当前 video。
+  // 倍速只影响当前视频：挂载、切换剧集或切换播放源后同步到当前 video。
   useEffect(() => {
     const el = video()
     if (!el) return
@@ -626,15 +624,9 @@ export function PlayerControls({
     }, PLAYBACK_RATE_HINT_MS)
   }, [onPlaybackRateChange])
 
-  const commitPlaybackRate = useCallback(() => {
-    onPlaybackRateCommit?.(playbackRateRef.current)
-  }, [onPlaybackRateCommit])
-
   const selectPlaybackRate = useCallback((next: number) => {
-    const normalized = normalizePlaybackRate(next)
-    changePlaybackRate(normalized)
-    onPlaybackRateCommit?.(normalized)
-  }, [changePlaybackRate, onPlaybackRateCommit])
+    changePlaybackRate(normalizePlaybackRate(next))
+  }, [changePlaybackRate])
 
   const applyAbsoluteSeek = useCallback(
     (absolute: number) => {
@@ -787,18 +779,6 @@ export function PlayerControls({
     return () => window.removeEventListener('keydown', onKey, true)
   }, [changePlaybackRate, queueRelativeSeek])
 
-  useEffect(() => {
-    const onKeyUp = (e: KeyboardEvent) => {
-      if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) return
-      if (e.key !== 'ArrowUp' && e.key !== 'ArrowDown') return
-      if (shouldIgnorePlayerSeekShortcut(e.target)) return
-      e.preventDefault()
-      commitPlaybackRate()
-    }
-    window.addEventListener('keyup', onKeyUp, true)
-    return () => window.removeEventListener('keyup', onKeyUp, true)
-  }, [commitPlaybackRate])
-
   useEffect(() => {
     return () => {
       if (seekApplyTimerRef.current) clearTimeout(seekApplyTimerRef.current)

web/src/pages/MediaDetailAdminPanel.tsx

@@ -1,4 +1,4 @@
-import { Database, FileText, FolderInput, Pencil, Search, Sparkles, Trash2 } from 'lucide-react'
+import { Database, FileText, FolderInput, Pencil, Search, ShieldAlert, Sparkles, Trash2 } from 'lucide-react'
 
 import { EpisodeArtworkToggle } from '../components/EpisodeArtworkToggle'
 import type { Media } from '../types'
@@ -34,50 +34,56 @@ export function MediaDetailAdminPanel({
   }
 
   return (
-    <div className="rounded-2xl border border-gray-200 bg-gray-50/50 p-5 space-y-3">
-      <p className="text-[10px] font-bold uppercase tracking-[0.2em] text-[#c9954a]">系统后台高级控制面板</p>
-      {isEpisodeArtworkTarget(media) && (
-        <EpisodeArtworkToggle
-          checked={scrapeEpisodeArtwork}
-          onChange={onScrapeEpisodeArtworkChange}
-          title="关闭后仍会获取每集简介、评分和时长，只跳过单集图片"
-          className="h-10"
-        />
-      )}
-      <div className="flex flex-wrap gap-2">
-        <button onClick={onSmartScrape} className="btn-outline py-2 px-3.5 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
+    <section className="overflow-hidden rounded-2xl border border-gray-200 bg-gray-50/50">
+      <div className="flex flex-wrap items-center justify-between gap-3 border-b border-gray-200/60 px-4 py-3 sm:px-5">
+        <p className="inline-flex items-center gap-2 text-2xs font-bold uppercase tracking-[0.18em] text-gray-500">
+          <ShieldAlert size={14} className="text-brand-500" />
+          系统后台高级控制面板
+        </p>
+        {isEpisodeArtworkTarget(media) && (
+          <EpisodeArtworkToggle
+            checked={scrapeEpisodeArtwork}
+            onChange={onScrapeEpisodeArtworkChange}
+            title="关闭后仍会获取每集简介、评分和时长，只跳过单集图片"
+            className="h-9 text-xs"
+          />
+        )}
+      </div>
+
+      <div className="flex flex-wrap items-center gap-2 px-4 py-4 sm:px-5">
+        <button onClick={onSmartScrape} className="btn-outline h-9 rounded-lg px-3 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
           <Sparkles size={13} className="text-[#c9954a]" />
           <span>智能刮削 (TMDB)</span>
         </button>
-        <button onClick={onManualScrape} className="btn-outline py-2 px-3.5 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
+        <button onClick={onManualScrape} className="btn-outline h-9 rounded-lg px-3 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
           <Search size={13} className="text-[#c9954a]" />
           <span>手动匹配刮削</span>
         </button>
-        <button onClick={onMetadataEdit} className="btn-outline py-2 px-3.5 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
-          <Pencil size={13} className="text-gray-600" />
+        <button onClick={onMetadataEdit} className="btn-outline h-9 rounded-lg px-3 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
+          <Pencil size={13} className="text-brand-500" />
           <span>编辑元数据</span>
         </button>
-        <button onClick={onOrganize} className="btn-outline py-2 px-3.5 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
+        <button onClick={onOrganize} className="btn-outline h-9 rounded-lg px-3 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
           <FolderInput size={13} className="text-[#c9954a]" />
           <span>整理入库</span>
         </button>
-        <button onClick={onProbe} className="btn-outline py-2 px-3.5 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
-          <Database size={13} className="text-gray-600" />
+        <button onClick={onProbe} className="btn-outline h-9 rounded-lg px-3 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
+          <Database size={13} className="text-brand-500" />
           <span>探测媒体轨 (ffprobe)</span>
         </button>
-        <button onClick={onExportNFO} className="btn-outline py-2 px-3.5 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
-          <FileText size={13} />
+        <button onClick={onExportNFO} className="btn-outline h-9 rounded-lg px-3 text-xs gap-1.5 border-gray-200 hover:border-brand-500/50 hover:bg-brand-50">
+          <FileText size={13} className="text-brand-500" />
           <span>写出本地 NFO 属性</span>
         </button>
         <button
           onClick={onDelete}
-          className="btn-outline py-2 px-3.5 text-xs gap-1.5 !border-red-100 !text-red-500 hover:!bg-red-50 hover:!border-red-200"
+          className="btn-outline ml-auto h-9 rounded-lg px-3 text-xs gap-1.5 !border-red-100 !text-red-500 hover:!bg-red-50 hover:!border-red-200"
         >
-          <Trash2 size={13} />
+          <Trash2 size={13} className="text-red-500" />
           <span>删除</span>
         </button>
       </div>
-    </div>
+    </section>
   )
 }
 

web/src/pages/MediaDetailMetadata.tsx

@@ -9,6 +9,10 @@ type MediaDetailMetadataProps = {
 export function MediaDetailMetadata({ media }: MediaDetailMetadataProps) {
   const heading = media.episode_title?.trim() || media.title
   const showTitleContext = Boolean(media.episode_title?.trim() && media.title && media.title !== heading)
+  const genres = parseCSV(media.genres)
+  const languages = parseCSV(media.languages)
+  const countries = parseCSV(media.countries)
+  const hasTaxonomy = genres.length > 0 || languages.length > 0 || countries.length > 0
 
   return (
     <>
@@ -21,26 +25,26 @@ export function MediaDetailMetadata({ media }: MediaDetailMetadataProps) {
             {media.title}
           </p>
         )}
-        <div className="flex flex-wrap items-center gap-2.5 text-xs text-gray-500 font-bold tracking-wide uppercase">
+        <div className="flex flex-wrap items-center gap-2">
           {media.year > 0 && (
-            <span className="inline-flex items-center gap-1 bg-gray-100 border border-gray-200/50 px-2.5 py-1 rounded-xl text-gray-700">
+            <span className="inline-flex h-7 items-center rounded-lg border border-gray-200/60 bg-gray-100 px-2.5 text-2xs font-bold uppercase tracking-wide gap-1.5 text-gray-700">
               <Calendar size={13} className="text-brand-500" />
               <span>{media.year} 年</span>
             </span>
           )}
-          {media.width > 0 && (
-            <span className="inline-flex items-center gap-1 bg-brand-50 text-brand-700 border border-brand-100/50 px-2.5 py-1 rounded-xl">
+          {media.width > 0 && media.height > 0 && (
+            <span className="inline-flex h-7 items-center rounded-lg border border-brand-100/50 bg-brand-50 px-2.5 text-2xs font-bold uppercase tracking-wide text-brand-700">
               <span>{media.width} × {media.height}</span>
             </span>
           )}
-          <span className="bg-gray-100 border border-gray-200/50 px-2.5 py-1 rounded-xl text-gray-700">
-            {fmtSize(media.size_bytes)}
-          </span>
-          <span className="bg-gray-100 border border-gray-200/50 px-2.5 py-1 rounded-xl text-gray-700">
-            {fmtDuration(media.duration_sec)}
-          </span>
+          {media.size_bytes > 0 && (
+            <span className="inline-flex h-7 items-center rounded-lg border border-gray-200/60 bg-gray-100 px-2.5 text-2xs font-bold uppercase tracking-wide text-gray-700">{fmtSize(media.size_bytes)}</span>
+          )}
+          {media.duration_sec > 0 && (
+            <span className="inline-flex h-7 items-center rounded-lg border border-gray-200/60 bg-gray-100 px-2.5 text-2xs font-bold uppercase tracking-wide text-gray-700">{fmtDuration(media.duration_sec)}</span>
+          )}
           {media.container && (
-            <span className="bg-gray-100 border border-gray-200/50 px-2.5 py-1 rounded-xl text-gray-700 font-mono">
+            <span className="inline-flex h-7 items-center rounded-lg border border-gray-200/60 bg-gray-100 px-2.5 text-2xs font-bold uppercase tracking-wide text-gray-700 font-mono">
               {media.container}
             </span>
           )}
@@ -56,24 +60,44 @@ export function MediaDetailMetadata({ media }: MediaDetailMetadataProps) {
         </div>
       )}
 
-      <div className="space-y-4">
-        <MetadataTags label="类型流派" values={parseCSV(media.genres)} primary />
-        <MetadataTags label="语言" values={parseCSV(media.languages)} />
-        <MetadataTags label="国家/地区" values={parseCSV(media.countries)} />
-      </div>
+      {hasTaxonomy && (
+        <div className="space-y-3">
+          <MetadataRow label="类型流派" values={parseCSV(media.genres)} tone="brand" />
+          <MetadataRow label="语言" values={parseCSV(media.languages)} />
+          <MetadataRow label="国家/地区" values={parseCSV(media.countries)} />
+          </div>
+      )}
     </>
   )
 }
 
-function MetadataTags({ label, values, primary = false }: { label: string; values: string[]; primary?: boolean }) {
+/**
+ * One "label - values" row of the taxonomy block.
+ *
+ * All rows share the same label gutter, so every value column starts on the
+ * same vertical line. Pills keep one geometry and differ by tone only.
+ */
+function MetadataRow({
+  label,
+  values,
+  tone = 'neutral',
+}: {
+  label: string
+  values: string[]
+  tone?: 'neutral' | 'brand'
+}) {
   if (values.length === 0) return null
-  const tagClass = primary
-    ? 'rounded-full bg-brand-50 text-brand-700 border border-brand-100/30 px-3 py-1 text-2xs font-bold uppercase tracking-wider'
-    : 'rounded-xl bg-gray-100 text-gray-600 border border-gray-200/40 px-2.5 py-1 text-2xs font-semibold'
+  const tagClass = [
+    'inline-flex items-center rounded-lg border px-2.5 py-1 text-2xs font-bold uppercase tracking-wide',
+    tone === 'brand'
+      ? 'border-brand-100/50 bg-brand-50 text-brand-700'
+      : 'border-gray-200/60 bg-gray-100 text-gray-600',
+  ].join(' ')
+
   return (
-    <div className="flex flex-wrap items-center gap-3">
-      <span className="text-xs font-bold text-gray-500 w-16 uppercase tracking-wider">{label}</span>
-      <div className="flex flex-wrap gap-2">
+    <div className="grid grid-cols-[4.5rem_1fr] items-start gap-2 sm:grid-cols-[5.5rem_1fr]">
+      <span className="pt-1 text-xs font-semibold text-gray-500">{label}</span>
+      <div className="flex flex-wrap gap-1.5">
         {values.map((value) => (
           <span key={value} className={tagClass}>
             {value}

web/src/pages/MediaDetailPageSections.tsx

@@ -99,19 +99,23 @@ export function MediaDetailPlaybackActions({
 }: MediaDetailPlaybackActionsProps) {
   const targetId = media.id || playTargetId || ''
   return (
-    <div className="flex flex-wrap gap-3">
-      <Link to={`/play/${targetId}`} state={{ from: `/media/${media.id}` }} className="btn-primary px-6 py-3.5 shadow-sm">
+    <div className="flex flex-wrap items-center gap-2.5">
+      <Link
+        to={`/play/${targetId}`}
+        state={{ from: `/media/${media.id}` }}
+        className="btn-primary h-11 px-6 shadow-sm"
+      >
         <Play size={16} fill="currentColor" />
         <span>立即播放</span>
       </Link>
 
       {!isDirectStreamMedia(media) && (
         <Link
-        to={`/play/${targetId}?mode=hls`}
-        state={{ from: `/media/${media.id}` }}
-        className="btn-outline border-brand-500/30 hover:border-brand-500 text-[#c9954a] hover:bg-brand-50 px-5"
-      >
-          <RefreshCw size={14} className="animate-spin-slow" />
+          to={`/play/${targetId}?mode=hls`}
+          state={{ from: `/media/${media.id}` }}
+          className="btn-outline h-11 border-brand-500/30 px-5 text-[#c9954a] hover:border-brand-500 hover:bg-brand-50"
+        >
+          <RefreshCw size={14} />
           <span>HLS 兼容转码播放</span>
         </Link>
       )}
@@ -121,7 +125,7 @@ export function MediaDetailPlaybackActions({
       <button
         onClick={onToggleFavourite}
         className={
-          'btn-outline gap-2 ' +
+          'btn-outline h-11 gap-2 ' +
           (favourite
             ? '!border-red-200 !bg-red-50 !text-red-600 hover:!bg-red-100/50'
             : 'hover:border-red-200 hover:text-red-600 hover:bg-red-50/50')
@@ -154,10 +158,10 @@ export function MediaDetailMainContent({
     <div className="relative z-10 p-6 sm:p-10 flex flex-col md:flex-row gap-8 lg:gap-12">
       <MediaDetailPoster media={media} />
 
-      <div className="flex-1 space-y-6">
+      <div className="min-w-0 flex-1 space-y-5">
         <MediaDetailMetadata media={media} />
-        <div className="divider border-gray-200/60" />
-        <div className="flex flex-col gap-5">
+        <div className="divider" />
+        <div className="space-y-4">
           <MediaDetailPlaybackActions
             media={media}
             favourite={favourite}
@@ -165,21 +169,21 @@ export function MediaDetailMainContent({
             playTargetId={playTargetId}
           />
           <MediaVersionSwitcher media={media} />
-          {isAdmin && (
-            <MediaDetailAdminPanel
-              media={media}
-              scrapeEpisodeArtwork={scrapeEpisodeArtwork}
-              onScrapeEpisodeArtworkChange={onScrapeEpisodeArtworkChange}
-              onSmartScrape={onSmartScrape}
-              onManualScrape={onManualScrape}
-              onMetadataEdit={onMetadataEdit}
-              onOrganize={onOrganize}
-              onProbe={onProbe}
-              onExportNFO={onExportNFO}
-              onDelete={onDelete}
-            />
-          )}
         </div>
+        {isAdmin && (
+          <MediaDetailAdminPanel
+            media={media}
+            scrapeEpisodeArtwork={scrapeEpisodeArtwork}
+            onScrapeEpisodeArtworkChange={onScrapeEpisodeArtworkChange}
+            onSmartScrape={onSmartScrape}
+            onManualScrape={onManualScrape}
+            onMetadataEdit={onMetadataEdit}
+            onOrganize={onOrganize}
+            onProbe={onProbe}
+            onExportNFO={onExportNFO}
+            onDelete={onDelete}
+          />
+        )}
       </div>
     </div>
   )

web/src/pages/PlayerPage.tsx

@@ -20,7 +20,7 @@ import { useAuthStore } from '../stores/auth'
 import type { Media, PlaybackInfo, PlaybackQuality, PlaybackSegment, PlaybackSegmentKind } from '../types'
 import { getSeriesKey, seriesTitleFromPath } from '../utils/groupSeries'
 import { mediaVersionMatches, mediaVersionsOf } from '../utils/mediaVersion'
-import { normalizePlaybackRate } from '../utils/playbackRate'
+import { DEFAULT_PLAYBACK_RATE, normalizePlaybackRate } from '../utils/playbackRate'
 import { resolveActiveSkip, skippedNoticeText, toSkipSegments, type SkipPrompt } from '../utils/skipSegments'
 import { isRemoteEmbyID } from '../utils/remoteEmby'
 import {
@@ -36,7 +36,7 @@ import {
   type SubtitleStylePreset,
 } from '../utils/subtitleDisplay'
 import { pickPlayerMode, needsTranscodeForBrowser, isDirectStreamMedia, isStrmMedia, type PlayerMode } from './playerPageModel'
-import { classifyDirectPlayError } from './directPlayError'
+import { classifyDirectPlayError, DIRECT_SEEK_GRACE_MS } from './directPlayError'
 import { apiErrorMessage } from './StrmManagePage'
 import { PlayerTopBar } from './PlayerTopBar'
 import { PlayerVideoStage } from './PlayerVideoStage'
@@ -75,13 +75,6 @@ type PlaybackProgressSession = {
 // 自动跳过片头后，「已跳过 · 撤销」提示停留的时长。
 const SKIP_NOTICE_MS = 6000
 
-// ffprobe 章节提取在服务端是异步的：pending 为 true 时按这个间隔重试，最多这么
-// 多次（远端探测实测 3～4 秒，本地更快；40 秒的预算足以覆盖慢速 CDN 与大文件）。
-// 重试期间播放完全不受影响；拿到数据时如果片头已经播过去了，resolveActiveSkip
-// 自然不会再提示，不会出现「点一下就跳过头」的按钮。
-const SKIP_SEGMENTS_POLL_MS = 4000
-const SKIP_SEGMENTS_MAX_POLLS = 10
-
 function normalizePlayerVolume(value: unknown): number {
   const parsed = Number(value)
   if (!Number.isFinite(parsed)) return 1
@@ -113,6 +106,10 @@ export function PlayerPage() {
   const progressSessionRef = useRef<PlaybackProgressSession | null>(null)
   const directRetryRef = useRef(false)
   const retryingDirectRef = useRef(false)
+  // 程序化续播 seek 后的宽限截止时间；期内直连误报不升到 HLS。
+  const directSeekGraceUntilRef = useRef(0)
+  // 切集时清掉旧 ?mode= 的同一轮渲染里，先挡住 modeParam effect 把 hls 写回来。
+  const ignoreModeParamRef = useRef(false)
   const fallbackTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
 
   const [media, setMedia] = useState<Media | null>(null)
@@ -146,16 +143,13 @@ export function PlayerPage() {
   const [playerVolume, setPlayerVolume] = useState(() =>
     normalizePlayerVolume(authUser?.player_volume),
   )
-  const [playerPlaybackRate, setPlayerPlaybackRate] = useState(() =>
-    normalizePlaybackRate(authUser?.player_playback_rate),
-  )
+  // 播放倍速只作用于当前视频：不入库、不跨视频沿用（换集/换片会重置回 1x）。
+  const [playerPlaybackRate, setPlayerPlaybackRate] = useState(() => DEFAULT_PLAYBACK_RATE)
   const persistedSubtitleChineseModeRef = useRef(subtitleChineseMode)
   // VR 全景播放的首次操作说明是否已经看过：null = 服务端配置还没读回来，
   // 这时不弹说明，避免给老用户闪一下。
   const [vr360GuideSeen, setVr360GuideSeen] = useState<boolean | null>(null)
   const playerVolumeTouchedRef = useRef(false)
-  const playerPlaybackRateTouchedRef = useRef(false)
-  const playerPlaybackRateSaveSeqRef = useRef(0)
   const subtitlePreferenceTouchedRef = useRef(false)
   const subtitlePreferenceSaveQueueRef = useRef<Promise<void>>(Promise.resolve())
   const [hlsUnavailable, setHlsUnavailable] = useState(false)
@@ -292,10 +286,6 @@ export function PlayerPage() {
         if (!playerVolumeTouchedRef.current) {
           setPlayerVolume(volume)
         }
-        const playbackRate = normalizePlaybackRate(cfg.playback_rate)
-        if (!playerPlaybackRateTouchedRef.current) {
-          setPlayerPlaybackRate(playbackRate)
-        }
         setDanmakuEnabled(cfg.enabled)
         setDanmakuOpacity(Number(cfg.opacity) || 1)
         setDanmakuFontSize(Number(cfg.font_size) || 24)
@@ -307,10 +297,6 @@ export function PlayerPage() {
           const current = useAuthStore.getState().user
           if (current) setAuthUser({ ...current, player_volume: volume })
         }
-        if (!playerPlaybackRateTouchedRef.current) {
-          const current = useAuthStore.getState().user
-          if (current) setAuthUser({ ...current, player_playback_rate: playbackRate })
-        }
       })
       .catch(() => {
         // 配置读取失败时保持本地默认值，不影响播放。
@@ -345,34 +331,11 @@ export function PlayerPage() {
     [setAuthUser],
   )
 
+  // 倍速只改本机播放状态：不写回服务端，也不跨视频沿用。
   const changePlayerPlaybackRate = useCallback((next: number) => {
-    playerPlaybackRateTouchedRef.current = true
     setPlayerPlaybackRate(normalizePlaybackRate(next))
   }, [])
 
-  const commitPlayerPlaybackRate = useCallback(
-    (next: number) => {
-      playerPlaybackRateTouchedRef.current = true
-      const playbackRate = normalizePlaybackRate(next)
-      setPlayerPlaybackRate(playbackRate)
-      const saveSeq = ++playerPlaybackRateSaveSeqRef.current
-      void danmakuAPI
-        .updateSettings({ playback_rate: playbackRate })
-        .then((cfg) => {
-          if (saveSeq !== playerPlaybackRateSaveSeqRef.current) return
-          const saved = normalizePlaybackRate(cfg.playback_rate)
-          setPlayerPlaybackRate(saved)
-          const current = useAuthStore.getState().user
-          if (current) setAuthUser({ ...current, player_playback_rate: saved })
-        })
-        .catch(() => {
-          if (saveSeq !== playerPlaybackRateSaveSeqRef.current) return
-          toast.error('倍速保存失败，请重试')
-        })
-    },
-    [setAuthUser],
-  )
-
   const saveDanmakuAdvanced = useCallback(
     async (values: { source: string; appId: string; appKey: string; clearAppKey: boolean }) => {
       const patch: DanmakuSettingsPatch = {
@@ -526,6 +489,15 @@ export function PlayerPage() {
     setDanmakuSearching(true)
     directRetryRef.current = false
     retryingDirectRef.current = false
+    directSeekGraceUntilRef.current = 0
+    // 新片子清掉上一部失败回退留下的 ?mode=hls，避免「一直 HLS」。
+    ignoreModeParamRef.current = true
+    setMode('direct')
+    const nextParams = new URLSearchParams(window.location.search)
+    if (nextParams.has('mode')) {
+      nextParams.delete('mode')
+      setParams(nextParams, { replace: true })
+    }
     if (fallbackTimerRef.current) {
       clearTimeout(fallbackTimerRef.current)
       fallbackTimerRef.current = null
@@ -536,7 +508,7 @@ export function PlayerPage() {
         fallbackTimerRef.current = null
       }
     }
-  }, [id])
+  }, [id, setParams])
 
   // 依赖收敛为 mode 参数的字符串值：避免 params 对象引用每次变化都重复拉取元数据
   const modeParam = params.get('mode') as PlayerMode | null
@@ -567,12 +539,18 @@ export function PlayerPage() {
       .then((m) => {
         if (cancelled) return
         setMedia(m)
-        const isDirect = isDirectStreamMedia(m)
-        const auto = pickPlayerMode(m)
-        // 直连解码模式以及远程 Emby 挂载忽略 ?mode=hls。STRM 默认直连，但允许手动/失败后切 HLS。
-        setMode(directOnly || isDirect ? 'direct' : (modeParam ?? auto))
         setPlayerError('')
         setLoadError('')
+        const isDirect = isDirectStreamMedia(m)
+        const auto = pickPlayerMode(m)
+        // 直连解码 / 远程 Emby：强制直连。
+        // 不把 modeParam 放进依赖：失败回退写 ?mode=hls 时不应重拉 metadata，
+        // 也不要用滞后的 get 回调把 hls 盖回 direct。
+        if (directOnly || isDirect) {
+          setMode('direct')
+          return
+        }
+        setMode((prev) => (prev === 'hls' ? prev : auto))
       })
       .catch((err: unknown) => {
         if (cancelled) return
@@ -582,7 +560,21 @@ export function PlayerPage() {
     return () => {
       cancelled = true
     }
-  }, [id, modeParam, directOnly])
+  }, [id, directOnly])
+
+  // 仅在用户手动切换 / 回退写入 URL 后，把 ?mode= 同步回 state（切集时 id effect 已清掉旧 mode）。
+  useEffect(() => {
+    if (ignoreModeParamRef.current) {
+      ignoreModeParamRef.current = false
+      return
+    }
+    if (directOnly) {
+      setMode('direct')
+      return
+    }
+    if (modeParam !== 'direct' && modeParam !== 'hls') return
+    setMode(modeParam)
+  }, [modeParam, directOnly, id])
 
   // VR 全景素材识别：只在用户没手动改过开关时自动进入 VR 模式。
   // 识别完全基于文件名/路径关键词与画幅比例，误判时点一下 VR 按钮即可退出。
@@ -681,6 +673,12 @@ export function PlayerPage() {
   const mediaId = media?.id
   const playbackProvider = playbackInfo?.provider
 
+  // 倍速只影响当前视频：换到另一集/另一部片时回到 1x，避免上一个视频的
+  // 倍速被顺手带到下一集。
+  useEffect(() => {
+    setPlayerPlaybackRate(DEFAULT_PLAYBACK_RATE)
+  }, [mediaId])
+
   // 加载统一播放能力：115 云端清晰度 + 本地 HLS 清晰度。
   useEffect(() => {
     if (!mediaId) return
@@ -739,7 +737,6 @@ export function PlayerPage() {
   useEffect(() => {
     if (!mediaId) return
     let cancelled = false
-    let pollTimer: ReturnType<typeof setTimeout> | null = null
     setRawSkipSegments([])
     setAutoSkipIntro(false)
     setActiveSkip(null)
@@ -747,28 +744,16 @@ export function PlayerPage() {
     setDismissedSkipKinds([])
     setAutoSuppressedKinds([])
     // 片段数据与播放来源无关，播放开始后异步补抓即可，绝不挡在起播路径上。
-    //
-    // 服务端的 ffprobe 章节提取是异步的：pending 为 true 说明这次还没结果，隔几秒
-    // 再拉一次。提取完成后如果片头还没播完，跳过按钮会自己出现；已经过了片头时间
-    // 的话 resolveActiveSkip 不会提示，所以不会出现「点一下就跳过头」的按钮。
-    const load = (attempt: number) => {
-      playbackAPI
-        .segments(mediaId)
-        .then((res) => {
-          if (cancelled) return
-          setAutoSkipIntro(Boolean(res.auto_skip))
-          setRawSkipSegments(res.segments ?? [])
-          const hasSegments = (res.segments ?? []).length > 0
-          if (res.pending && !hasSegments && attempt < SKIP_SEGMENTS_MAX_POLLS) {
-            pollTimer = setTimeout(() => load(attempt + 1), SKIP_SEGMENTS_POLL_MS)
-          }
-        })
-        .catch(() => undefined)
-    }
-    load(0)
+    playbackAPI
+      .segments(mediaId)
+      .then((res) => {
+        if (cancelled) return
+        setAutoSkipIntro(Boolean(res.auto_skip))
+        setRawSkipSegments(res.segments ?? [])
+      })
+      .catch(() => undefined)
     return () => {
       cancelled = true
-      if (pollTimer) clearTimeout(pollTimer)
     }
   }, [mediaId])
 
@@ -1131,32 +1116,72 @@ export function PlayerPage() {
     }
     const video = ref.current
     if (!video) return
+
+    let cancelled = false
+    let seekStarted = false
     let onSeeked: (() => void) | undefined
-    const applyResume = () => {
-      if (resumePosition > 0 && Math.abs(video.currentTime - resumePosition) > 2) {
-        onSeeked = () => {
-          setInitialSeekDone(true)
-          const m = Math.floor(resumePosition / 60)
-          const s = Math.floor(resumePosition % 60)
-          const timeStr = `${m.toString().padStart(2, '0')}:${s.toString().padStart(2, '0')}`
-          toast.success(`已恢复上次播放进度至 ${timeStr}`, { duration: 2500 })
-        }
-        video.addEventListener('seeked', onSeeked, { once: true })
-        video.currentTime = resumePosition
+    let onPlaying: (() => void) | undefined
+    let onCanPlay: (() => void) | undefined
+
+    const notifyResume = () => {
+      const m = Math.floor(resumePosition / 60)
+      const s = Math.floor(resumePosition % 60)
+      const timeStr = `${m.toString().padStart(2, '0')}:${s.toString().padStart(2, '0')}`
+      toast.success(`已恢复上次播放进度至 ${timeStr}`, { duration: 2500 })
+    }
+
+    const performResumeSeek = () => {
+      if (cancelled || seekStarted) return
+      if (Math.abs(video.currentTime - resumePosition) <= 2) {
+        seekStarted = true
+        setInitialSeekDone(true)
         return
       }
-      setInitialSeekDone(true)
+      seekStarted = true
+      // 115/STRM 302 直链上过早 seek 会让 Chromium 误报 error 并触发 HLS 回退。
+      directSeekGraceUntilRef.current = Date.now() + DIRECT_SEEK_GRACE_MS
+      directRetryRef.current = false
+      clearFallbackTimer()
+      onSeeked = () => {
+        setInitialSeekDone(true)
+        notifyResume()
+      }
+      video.addEventListener('seeked', onSeeked, { once: true })
+      try {
+        video.currentTime = resumePosition
+      } catch {
+        setInitialSeekDone(true)
+      }
     }
-    if (video.readyState >= HTMLMediaElement.HAVE_FUTURE_DATA) {
-      applyResume()
+
+    // STRM/云盘：等真正起播后再续播跳转，避免 302 未完成就 seek。
+    // 本地文件仍可在 canplay 后立刻跳，体验更干净。
+    const deferForStrm = isStrmMedia(mediaRef.current)
+    if (deferForStrm) {
+      onPlaying = () => {
+        performResumeSeek()
+      }
+      if (!video.paused && video.readyState >= HTMLMediaElement.HAVE_FUTURE_DATA) {
+        performResumeSeek()
+      } else {
+        video.addEventListener('playing', onPlaying, { once: true })
+      }
+    } else if (video.readyState >= HTMLMediaElement.HAVE_FUTURE_DATA) {
+      performResumeSeek()
     } else {
-      video.addEventListener('canplay', applyResume, { once: true })
+      onCanPlay = () => {
+        performResumeSeek()
+      }
+      video.addEventListener('canplay', onCanPlay, { once: true })
     }
+
     return () => {
-      video.removeEventListener('canplay', applyResume)
+      cancelled = true
+      if (onPlaying) video.removeEventListener('playing', onPlaying)
+      if (onCanPlay) video.removeEventListener('canplay', onCanPlay)
       if (onSeeked) video.removeEventListener('seeked', onSeeked)
     }
-  }, [resumePosition, initialSeekDone, mode, hlsStartSec])
+  }, [resumePosition, initialSeekDone, mode, hlsStartSec, clearFallbackTimer])
 
   // 使用 ref 实时同步进度计算所需的状态，避免每次 hlsStartSec 改变都触发 cleanup 并误上报旧进度
   const hlsStartSecRef = useRef(hlsStartSec)
@@ -1810,6 +1835,7 @@ export function PlayerPage() {
       elementSrc: video?.src ?? '',
       expectedSrc,
       alreadyRetried: directRetryRef.current,
+      seekGraceActive: Date.now() < directSeekGraceUntilRef.current,
     })
     if (action === 'ignore') return
 
@@ -1827,6 +1853,8 @@ export function PlayerPage() {
 
     const fallbackDirectPlay = () => {
       if (modeRef.current !== 'direct') return
+      // 宽限期内又触发的迟到 fallback 定时器：直接丢掉。
+      if (Date.now() < directSeekGraceUntilRef.current) return
       const current = ref.current
       if (current && current.readyState >= HTMLMediaElement.HAVE_CURRENT_DATA) return
       if (isRemoteEmbyID(mediaRef.current?.id) || isDirectStreamMedia(mediaRef.current)) {
@@ -1861,7 +1889,9 @@ export function PlayerPage() {
     }
 
     clearFallbackTimer()
-    fallbackTimerRef.current = setTimeout(fallbackDirectPlay, 1500)
+    // STRM/115 直链冷启动比本地文件慢，给足缓冲时间再判定失败。
+    const fallbackDelayMs = isStrmMedia(mediaRef.current) ? 4000 : 1500
+    fallbackTimerRef.current = setTimeout(fallbackDirectPlay, fallbackDelayMs)
   }, [
     clearFallbackTimer,
     directOnly,
@@ -1927,7 +1957,6 @@ export function PlayerPage() {
         onPlayerVolumeCommit={commitPlayerVolume}
         playerPlaybackRate={playerPlaybackRate}
         onPlayerPlaybackRateChange={changePlayerPlaybackRate}
-        onPlayerPlaybackRateCommit={commitPlayerPlaybackRate}
         danmakuEnabled={danmakuEnabled}
         danmakuOpacity={danmakuOpacity}
         danmakuFontSize={danmakuFontSize}

web/src/pages/PlayerVideoStage.tsx

@@ -184,7 +184,6 @@ type PlayerVideoStageProps = {
   onPlayerVolumeCommit: (volume: number) => void
   playerPlaybackRate: number
   onPlayerPlaybackRateChange: (rate: number) => void
-  onPlayerPlaybackRateCommit: (rate: number) => void
   danmakuEnabled: boolean
   danmakuOpacity: number
   danmakuFontSize: number
@@ -268,7 +267,6 @@ export function PlayerVideoStage({
   onPlayerVolumeCommit,
   playerPlaybackRate,
   onPlayerPlaybackRateChange,
-  onPlayerPlaybackRateCommit,
   danmakuEnabled,
   danmakuOpacity,
   danmakuFontSize,
@@ -892,7 +890,6 @@ export function PlayerVideoStage({
             onVolumeCommit={onPlayerVolumeCommit}
             playbackRate={playerPlaybackRate}
             onPlaybackRateChange={onPlayerPlaybackRateChange}
-            onPlaybackRateCommit={onPlayerPlaybackRateCommit}
             uiVisible={controlsVisible && !locked}
             onUiVisibleChange={setControlsVisible}
             uiHold={vrUiHovered}

web/src/pages/ProfileFormModal.tsx

@@ -37,7 +37,6 @@ export function ProfileFormModal({
     preferred_audio_lang: editing?.preferred_audio_lang ?? '',
     autoplay_next: editing?.autoplay_next ?? true,
     skip_intro: editing?.skip_intro ?? false,
-    segment_source: editing?.segment_source ?? 'auto',
     allowed_library_ids: editing?.allowed_library_ids ?? [],
   }))
   const [saving, setSaving] = useState(false)

web/src/pages/ProfileFormSections.tsx

@@ -126,17 +126,6 @@ export function ProfilePreferenceFields({
         checked={form.skip_intro}
         onChange={(value) => update({ skip_intro: value })}
       />
-      <Field label="片头片尾数据来源">
-        <select
-          className="input-base"
-          value={form.segment_source}
-          onChange={(event) => update({ segment_source: event.target.value as PlayProfileInput['segment_source'] })}
-        >
-          <option value="auto">自动（优先用文件内嵌章节，没有可用章节时用 TheIntroDB）</option>
-          <option value="theintrodb">TheIntroDB 社区数据库（依赖刮削出的 TMDb ID）</option>
-          <option value="ffprobe">ffprobe 本地提取（读取文件内嵌章节，不联网）</option>
-        </select>
-      </Field>
     </>
   )
 }

web/src/pages/directPlayError.ts

@@ -3,9 +3,15 @@ export type DirectPlayErrorAction = 'ignore' | 'retry' | 'fallback'
 const MEDIA_ERR_ABORTED = 1
 const HAVE_CURRENT_DATA = 2
 
+/** 程序化续播/跳转后忽略直连误报的宽限期（毫秒）。 */
+export const DIRECT_SEEK_GRACE_MS = 12_000
+
 /**
  * Chromium 常把被中断的直连（换 src、插入 track、302 未完成就 seek）
  * 报成 error。真正不兼容应 fallback；瞬时中断应忽略或静默重试一次。
+ *
+ * seekGraceActive：程序化续播/跳转后的宽限期。115 STRM 在 302 直链上
+ * seek 时 Chromium 经常误报 decode/network error，此时绝不能升到 HLS。
  */
 export function classifyDirectPlayError(input: {
   errorCode: number | undefined | null
@@ -13,12 +19,15 @@ export function classifyDirectPlayError(input: {
   elementSrc: string
   expectedSrc: string
   alreadyRetried: boolean
+  seekGraceActive?: boolean
 }): DirectPlayErrorAction {
   const code = input.errorCode ?? 0
   if (code === MEDIA_ERR_ABORTED) return 'ignore'
   if (input.readyState >= HAVE_CURRENT_DATA) return 'ignore'
   if (!input.elementSrc) return 'ignore'
   if (input.expectedSrc && input.elementSrc !== input.expectedSrc) return 'ignore'
+  // 续播 seek 宽限期内：误报很常见，且 retry 会 video.load() 把进度清零，直接忽略。
+  if (input.seekGraceActive) return 'ignore'
   if (!input.alreadyRetried) return 'retry'
   return 'fallback'
 }

web/src/pages/playerPageModel.test.ts

@@ -72,4 +72,28 @@ check(
   }) === 'fallback',
 )
 
+check(
+  'seek grace ignores decode miss without retrying',
+  classifyDirectPlayError({
+    errorCode: 4,
+    readyState: 0,
+    elementSrc: src,
+    expectedSrc: src,
+    alreadyRetried: false,
+    seekGraceActive: true,
+  }) === 'ignore',
+)
+
+check(
+  'seek grace never falls back to HLS',
+  classifyDirectPlayError({
+    errorCode: 4,
+    readyState: 0,
+    elementSrc: src,
+    expectedSrc: src,
+    alreadyRetried: true,
+    seekGraceActive: true,
+  }) === 'ignore',
+)
+
 console.log('playerPageModel.test.ts ok')

web/src/pages/settingsGroupGeneral.ts

@@ -23,6 +23,13 @@ export const generalSettingsGroup: SettingGroup = {
       hint: '默认关闭。开启后宿主机不再进行任何 FFmpeg 转码，所有播放交给第三方客户端（Infuse / VLC / Emby 客户端等）或浏览器本地解码直连（direct play / 302 直链），大幅降低宿主机 CPU 占用。若客户端不支持源编码可能无法播放。',
       defaultValue: 'false',
     },
+    {
+      key: 'segment.prewarm_enabled',
+      label: '后台预热 IntroDB 片头片段',
+      type: 'toggle',
+      hint: '默认关闭。开启后每 6 小时在后台向 TheIntroDB 拉取可识别媒体的片头/片尾区间并写入本地；关闭时仅在播放时按需请求。',
+      defaultValue: 'false',
+    },
     {
       key: 'transcode.enabled',
       label: '启用转码',

web/src/types/auth.ts

@@ -12,8 +12,6 @@ export interface User {
   subtitle_chinese_mode?: 'original' | 'simplified' | 'traditional'
   /** 本地缓存的播放器音量，服务端配置接口会刷新。 */
   player_volume?: number
-  /** 本地缓存的播放倍速，服务端配置接口会刷新。 */
-  player_playback_rate?: number
   force_password_reset: boolean
   is_active: boolean
   allowed_library_ids?: string[]

web/src/types/playProfiles.ts

@@ -10,13 +10,9 @@ export interface PlayProfile {
   preferred_audio_lang?: string
   autoplay_next: boolean
   skip_intro: boolean
-  segment_source?: SegmentSource
   allowed_library_ids: string[]
   total_watch_time: number
   last_active_at?: string
   created_at: string
   updated_at: string
 }
-
-/** 片头/片尾数据来源：auto 优先文件内嵌章节，没有则回落 TheIntroDB。 */
-export type SegmentSource = 'auto' | 'theintrodb' | 'ffprobe'

web/src/types/playback.ts

@@ -43,16 +43,5 @@ export interface PlaybackSegmentsResponse {
   segments: PlaybackSegment[]
   /** 当前生效播放档案的「自动跳过片头」开关。 */
   auto_skip: boolean
-  /**
-   * true 表示 ffprobe 章节提取还在服务端后台跑：这次可能还没有章节数据，隔几秒
-   * 再拉一次就能拿到。拿到时若片头还没播完，跳过按钮会自动出现；已经过了片头
-   * 时间则不会提示。
-   */
-  pending?: boolean
-  /** 本次实际生效的数据来源。 */
-  source?: PlaybackSegmentSource
 }
 
-/** 片头/片尾数据来源，与后端 play_profiles.segment_source 一致。 */
-export type PlaybackSegmentSource = 'auto' | 'theintrodb' | 'ffprobe'
-

web/src/utils/playbackRate.ts

@@ -3,6 +3,9 @@ export const PLAYBACK_RATE_OPTIONS = [0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3]
 export const MIN_PLAYBACK_RATE = PLAYBACK_RATE_OPTIONS[0]
 export const MAX_PLAYBACK_RATE = PLAYBACK_RATE_OPTIONS[PLAYBACK_RATE_OPTIONS.length - 1]
 
+/** 默认倍速（1x）。倍速不落库，每个视频都从这个值开始。 */
+export const DEFAULT_PLAYBACK_RATE = 1
+
 export function normalizePlaybackRate(value: unknown): number {
   const parsed = Number(value)
   if (!Number.isFinite(parsed)) return 1