优化

internal/service/media_library.go

@@ -100,14 +100,21 @@ func (s *MediaService) ListLibrariesWithPreview(ctx context.Context, libraries [
 		if len(items) == 0 {
 			continue
 		}
-		cards := groupMediaSeriesCards(items)
-		if len(cards) > cardLimit {
-			cards = cards[:cardLimit]
-		}
-		if cards == nil {
-			cards = []SeriesCard{}
-		}
-		out[i].Cards = cards
+			cards := groupMediaSeriesCards(items)
+			// 如果折叠后的作品部数不足 cardLimit，且该库总记录数大于当前提取的条目数，
+			// 说明多集剧集折叠占满了提取窗口，调用 ListLibrarySeriesCards 补齐完整的影视部数。
+			if len(cards) < cardLimit && out[i].Total > int64(len(items)) {
+				if fullCards, _, err := s.ListLibrarySeriesCards(ctx, out[i].ID, visibility); err == nil && len(fullCards) > 0 {
+					cards = fullCards
+				}
+			}
+			if len(cards) > cardLimit {
+				cards = cards[:cardLimit]
+			}
+			if cards == nil {
+				cards = []SeriesCard{}
+			}
+			out[i].Cards = cards
 	}
 
 	if s.cache != nil {

internal/service/media_library_test.go

@@ -92,3 +92,66 @@ func TestListLibrariesWithPreview(t *testing.T) {
 		t.Errorf("preview[1].Cards[0].Count = %d, want 12", previews[1].Cards[0].Count)
 	}
 }
+
+func TestListLibrariesWithPreviewLongSeriesCompletion(t *testing.T) {
+	db := newServiceTestDB(t, &model.Library{}, &model.Media{})
+	repos := repository.New(db)
+
+	lib := model.Library{Name: "剧集库", Path: "/media/tv", Type: "tv", Enabled: true}
+	if err := repos.Library.Create(t.Context(), &lib); err != nil {
+		t.Fatal(err)
+	}
+
+	now := time.Date(2026, 7, 2, 12, 0, 0, 0, time.UTC)
+	var rows []model.Media
+
+	// 1. 添加一部更早入库的短剧（2 集），如果按窗口 60 条限制，排在第 70 集之后，无法被初始窗口截取
+	for i := 1; i <= 2; i++ {
+		rows = append(rows, model.Media{
+			Base:       model.Base{ID: fmt.Sprintf("short-ep-%02d", i), CreatedAt: now.Add(-time.Duration(100-i) * time.Minute)},
+			LibraryID:  lib.ID,
+			Title:      fmt.Sprintf("经典短剧 第%d集", i),
+			Path:       fmt.Sprintf("/media/tv/经典短剧/Season 01/经典短剧.S01E%02d.mp4", i),
+			SeasonNum:  1,
+			EpisodeNum: i,
+		})
+	}
+
+	// 2. 添加一部最新入库的 70 集长篇连续剧，这 70 篇全在新入库时间线上
+	for i := 1; i <= 70; i++ {
+		rows = append(rows, model.Media{
+			Base:       model.Base{ID: fmt.Sprintf("long-ep-%02d", i), CreatedAt: now.Add(time.Duration(i) * time.Minute)},
+			LibraryID:  lib.ID,
+			Title:      fmt.Sprintf("大长篇连续剧 第%d集", i),
+			Path:       fmt.Sprintf("/media/tv/大长篇连续剧/Season 01/大长篇连续剧.S01E%02d.mp4", i),
+			SeasonNum:  1,
+			EpisodeNum: i,
+		})
+	}
+
+	if err := repos.DB.Create(&rows).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos)
+
+	// 请求 10 部卡片
+	previews, err := svc.ListLibrariesWithPreview(t.Context(), []model.Library{lib}, MediaVisibility{IncludeNSFW: true}, 10)
+	if err != nil {
+		t.Fatalf("ListLibrariesWithPreview failed: %v", err)
+	}
+
+	if len(previews) != 1 {
+		t.Fatalf("got %d previews, want 1", len(previews))
+	}
+
+	// 总媒体行数是 72 行
+	if previews[0].Total != 72 {
+		t.Errorf("previews[0].Total = %d, want 72", previews[0].Total)
+	}
+
+	// 验证自适应补全机制：必须包含 2 部剧集（长篇 + 短剧），而不是因为长篇 70 集占满窗口只显示 1 部
+	if len(previews[0].Cards) != 2 {
+		t.Fatalf("previews[0].Cards count = %d, want 2", len(previews[0].Cards))
+	}
+}

web/src/pages/HomePage.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useState } from 'react'
+import { useEffect, useMemo, useRef, useState } from 'react'
 
 import { libraryAPI, type LibraryWithPreview } from '../api/library'
 import { historyAPI } from '../api/history'
@@ -34,7 +34,7 @@ export function HomePage() {
     let cancelled = false
 
     libraryAPI
-      .list({ withPreview: true, previewLimit: 20 })
+      .list({ withPreview: true, previewLimit: 10 })
       .then((rows) => asArray<LibraryWithPreview>(rows))
       .catch(() => [] as LibraryWithPreview[])
       .then((libs) => {
@@ -140,6 +140,50 @@ export function HomePage() {
 
   const sortedLibraries = useMemo(() => sortByPinnedIds(libraries, pinnedIds), [libraries, pinnedIds])
 
+  // 过滤出有内容的媒体库，避免空库空占名额
+  const activeLibraries = useMemo(() => {
+    return sortedLibraries.filter((lib) => (libraryData[lib.id]?.cards?.length ?? 0) > 0)
+  }, [sortedLibraries, libraryData])
+
+  // 媒体库展示行支持向下滑动渐进流式加载：默认先展示前 3 个库，
+  // 随着用户向下滑动接近底部，通过 IntersectionObserver 动态解锁后续媒体库。
+  const INITIAL_ROWS = 3
+  const STEP_ROWS = 2
+  const [visibleRowCount, setVisibleRowCount] = useState(INITIAL_ROWS)
+  const sentinelRef = useRef<HTMLDivElement | null>(null)
+
+  useEffect(() => {
+    const sentinel = sentinelRef.current
+    if (!sentinel) return
+
+    const scrollParent = document.getElementById('app-main-scroll')
+    const observer = new IntersectionObserver(
+      (entries) => {
+        const [entry] = entries
+        if (entry?.isIntersecting) {
+          setVisibleRowCount((prev) => {
+            if (prev >= activeLibraries.length) return prev
+            return Math.min(prev + STEP_ROWS, activeLibraries.length)
+          })
+        }
+      },
+      {
+        root: scrollParent,
+        rootMargin: '400px 0px',
+        threshold: 0,
+      },
+    )
+
+    observer.observe(sentinel)
+    return () => {
+      observer.disconnect()
+    }
+  }, [activeLibraries.length])
+
+  const visibleLibraries = useMemo(() => {
+    return activeLibraries.slice(0, visibleRowCount)
+  }, [activeLibraries, visibleRowCount])
+
   // 库列表还没回来先展示整页 loading；库为空时再等一下播放记录，
   // 以免在"空站点"和"有观看记录"两个终态之间闪空白。
   if (librariesLoading || (libraries.length === 0 && historyLoading)) {
@@ -174,20 +218,29 @@ export function HomePage() {
         />
       )}
 
-      {/* 4. 各媒体库内容展示行 */}
-      <div className="space-y-10">
-        {sortedLibraries.map((lib) => {
-          const cards = libraryData[lib.id]?.cards || []
-          if (cards.length === 0) return null
-          return (
-            <HomeLibraryRowSection
-              key={lib.id}
-              library={lib}
-              cards={cards}
-            />
-          )
-        })}
-      </div>
+      {/* 4. 各媒体库内容展示行（向下滑动渐进流式加载） */}
+      {visibleLibraries.length > 0 && (
+        <div className="space-y-10">
+          {visibleLibraries.map((lib) => {
+            const cards = libraryData[lib.id]?.cards || []
+            return (
+              <HomeLibraryRowSection
+                key={lib.id}
+                library={lib}
+                cards={cards}
+              />
+            )
+          })}
+          {visibleRowCount < activeLibraries.length && (
+            <div ref={sentinelRef} className="flex h-10 w-full items-center justify-center py-2 opacity-60">
+              <div className="flex items-center gap-2 text-xs text-[var(--app-muted)]">
+                <div className="h-1.5 w-1.5 animate-ping rounded-full bg-brand-500" />
+                <span>加载更多媒体库…</span>
+              </div>
+            </div>
+          )}
+        </div>
+      )}
     </div>
   )
 }

web/src/pages/LibrariesPageSections.tsx

@@ -1,4 +1,4 @@
-import type { ReactNode } from 'react'
+import { useEffect, useMemo, useRef, useState, type ReactNode } from 'react'
 import { Link } from 'react-router-dom'
 import { motion } from 'framer-motion'
 import { ArrowRight, Film, FolderOpen, Library as LibraryIcon, Music, Pin, PlayCircle, RefreshCw, Sparkles, Tv } from 'lucide-react'
@@ -114,6 +114,45 @@ export function LibrariesContent({
 }) {
   const pinnedCount = previews.filter((preview) => isLibraryPinned(preview.library.id, pinnedIds)).length
 
+  // 下方媒体库货架支持向下滑动渐进流式加载：默认先展示前 3 个库货架，
+  // 随着用户向下滑动接近底部，通过 IntersectionObserver 动态解锁后续媒体库货架。
+  const INITIAL_SHELVES = 3
+  const STEP_SHELVES = 2
+  const [visibleCount, setVisibleCount] = useState(INITIAL_SHELVES)
+  const sentinelRef = useRef<HTMLDivElement | null>(null)
+
+  useEffect(() => {
+    const sentinel = sentinelRef.current
+    if (!sentinel) return
+
+    const scrollParent = document.getElementById('app-main-scroll')
+    const observer = new IntersectionObserver(
+      (entries) => {
+        const [entry] = entries
+        if (entry?.isIntersecting) {
+          setVisibleCount((prev) => {
+            if (prev >= previews.length) return prev
+            return Math.min(prev + STEP_SHELVES, previews.length)
+          })
+        }
+      },
+      {
+        root: scrollParent,
+        rootMargin: '400px 0px',
+        threshold: 0,
+      },
+    )
+
+    observer.observe(sentinel)
+    return () => {
+      observer.disconnect()
+    }
+  }, [previews.length])
+
+  const visiblePreviews = useMemo(() => {
+    return previews.slice(0, visibleCount)
+  }, [previews, visibleCount])
+
   return (
     <>
       <section className="space-y-4">
@@ -142,21 +181,32 @@ export function LibrariesContent({
         </div>
       </section>
 
-      <section className="space-y-6">
-        {previews.map((preview, index) => (
-          <motion.div
-            key={preview.library.id}
-            initial={{ opacity: 0, y: 12 }}
-            animate={{ opacity: 1, y: 0 }}
-            transition={{ delay: index * 0.03 }}
-          >
-            <LibraryShelf
-              preview={preview}
-              pinned={isLibraryPinned(preview.library.id, pinnedIds)}
-            />
-          </motion.div>
-        ))}
-      </section>
+      {visiblePreviews.length > 0 && (
+        <section className="space-y-6">
+          {visiblePreviews.map((preview, index) => (
+            <motion.div
+              key={preview.library.id}
+              initial={{ opacity: 0, y: 12 }}
+              animate={{ opacity: 1, y: 0 }}
+              transition={{ delay: Math.min(index, 3) * 0.03 }}
+            >
+              <LibraryShelf
+                preview={preview}
+                pinned={isLibraryPinned(preview.library.id, pinnedIds)}
+              />
+            </motion.div>
+          ))}
+
+          {visibleCount < previews.length && (
+            <div ref={sentinelRef} className="flex h-10 w-full items-center justify-center py-2 opacity-60">
+              <div className="flex items-center gap-2 text-xs text-[var(--app-muted)]">
+                <div className="h-1.5 w-1.5 animate-ping rounded-full bg-brand-500" />
+                <span>加载更多媒体库货架…</span>
+              </div>
+            </div>
+          )}
+        </section>
+      )}
     </>
   )
 }