feat: 播放页按来源列表切换，新增作者/搜索/hashtag 侧栏

- 播放上下文：作品链接带上来源（搜索、标签、作者、hashtag），上一条/下一条
  在该列表内移动；当前作品不在列表中时退回全部作品的发布时间顺序
- 顶部提示标签显示当前列表与位置，点击打开侧栏列表，✕ 退出
- 侧栏改为「评论 | TA的作品 | 搜索结果/#hashtag」标签页，作品封面网格可就地切换
- 作者模式：打开「TA的作品」进入，关闭侧栏不退出，点提示 ✕ 后回到原来的列表
- 从搜索结果进入或点 hashtag 时自动打开对应列表
- 描述中的 hashtag 可点击，按完整 hashtag 精确匹配（#丰川祥子 不含 #丰川祥子cos）
- 新增 /api/playlist；搜索 SQL 抽到 lib/search-query.ts 与播放页共用，保证顺序一致
- 移动端：底部抽屉、点作品后收起，媒体区支持上下滑切换

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/aweme/[awemeId]/hooks/useNavigation.ts

@@ -50,8 +50,8 @@ export function useNavigation({
   // 预取路由
   useEffect(() => {
     if (!neighbors) return;
-    if (neighbors.next) router.prefetch(`/aweme/${neighbors.next.aweme_id}`);
-    if (neighbors.prev) router.prefetch(`/aweme/${neighbors.prev.aweme_id}`);
+    if (neighbors.next) router.prefetch(neighbors.next.href);
+    if (neighbors.prev) router.prefetch(neighbors.prev.href);
   }, [neighbors, router]);
 
   // 鼠标滚轮切换
@@ -72,10 +72,10 @@ export function useNavigation({
 
       if (dy > 0 && neighbors?.next) {
         wheelCooldownRef.current = now;
-        router.push(`/aweme/${neighbors.next.aweme_id}`);
+        router.push(neighbors.next.href);
       } else if (dy < 0 && neighbors?.prev) {
         wheelCooldownRef.current = now;
-        router.push(`/aweme/${neighbors.prev.aweme_id}`);
+        router.push(neighbors.prev.href);
       }
     };
 
@@ -83,6 +83,90 @@ export function useNavigation({
     return () => el.removeEventListener("wheel", onWheel);
   }, [neighbors, mediaContainerRef, router]);
 
+  // 触屏上下滑切换（上滑下一条，下滑上一条）。只认明显的竖向手势，
+  // 不影响图文的左右滑动；从按钮、链接、控制栏（data-no-swipe）上开始的触摸不处理。
+  useEffect(() => {
+    const el = mediaContainerRef.current;
+    if (!el) return;
+
+    let start: { x: number; y: number; t: number } | null = null;
+    let vertical = false;
+
+    const onTouchStart = (e: TouchEvent): void => {
+      const target = e.target as HTMLElement | null;
+      if (
+        e.touches.length !== 1 ||
+        target?.closest(
+          "button, a, input, textarea, select, [role='slider'], [data-no-swipe]",
+        )
+      ) {
+        start = null;
+        return;
+      }
+      const touch = e.touches[0];
+      start = { x: touch.clientX, y: touch.clientY, t: performance.now() };
+      vertical = false;
+    };
+
+    const onTouchMove = (e: TouchEvent): void => {
+      if (!start) return;
+      if (e.touches.length !== 1) {
+        start = null;
+        return;
+      }
+      const touch = e.touches[0];
+      const dx = touch.clientX - start.x;
+      const dy = touch.clientY - start.y;
+      if (!vertical && Math.abs(dy) > 12 && Math.abs(dy) > Math.abs(dx) * 1.5) {
+        vertical = true;
+      }
+      // 竖向手势由我们处理，阻止浏览器下拉刷新 / 回弹
+      if (vertical && e.cancelable) e.preventDefault();
+    };
+
+    const onTouchEnd = (e: TouchEvent): void => {
+      if (!start) return;
+      const touch = e.changedTouches[0];
+      const dy = touch.clientY - start.y;
+      const elapsed = performance.now() - start.t;
+      const wasVertical = vertical;
+      start = null;
+      vertical = false;
+      if (!wasVertical) return;
+
+      // 快速轻扫，或者慢慢拖过屏幕高度的四分之一
+      const flick = Math.abs(dy) > 60 && elapsed < 800;
+      const longDrag = Math.abs(dy) > window.innerHeight * 0.25;
+      if (!flick && !longDrag) return;
+
+      const now = performance.now();
+      if (now - wheelCooldownRef.current < 500) return;
+      if (dy < 0 && neighbors?.next) {
+        wheelCooldownRef.current = now;
+        router.push(neighbors.next.href);
+      } else if (dy > 0 && neighbors?.prev) {
+        wheelCooldownRef.current = now;
+        router.push(neighbors.prev.href);
+      }
+    };
+
+    const onTouchCancel = (): void => {
+      start = null;
+      vertical = false;
+    };
+
+    el.addEventListener("touchstart", onTouchStart, { passive: true });
+    el.addEventListener("touchmove", onTouchMove, { passive: false });
+    el.addEventListener("touchend", onTouchEnd);
+    el.addEventListener("touchcancel", onTouchCancel);
+    return () => {
+      el.removeEventListener("touchstart", onTouchStart);
+      el.removeEventListener("touchmove", onTouchMove);
+      el.removeEventListener("touchend", onTouchEnd);
+      el.removeEventListener("touchcancel", onTouchCancel);
+    };
+  }, [neighbors, mediaContainerRef, router]);
+
   // 键盘快捷键（支持向右箭头 / D 键区分短按与长按 2 倍速，以及视频 [ ] 设置 AB 循环）
   useEffect(() => {
     const clearLongPressTimer = (): void => {
@@ -124,7 +208,7 @@ export function useNavigation({
         if (now - wheelCooldownRef.current < 700) return;
         if (neighbors?.prev) {
           wheelCooldownRef.current = now;
-          router.push(`/aweme/${neighbors.prev.aweme_id}`);
+          router.push(neighbors.prev.href);
         }
       } else if (key === "arrowdown" || key === "s" || code === "KeyS") {
         e.preventDefault();
@@ -132,7 +216,7 @@ export function useNavigation({
         if (now - wheelCooldownRef.current < 700) return;
         if (neighbors?.next) {
           wheelCooldownRef.current = now;
-          router.push(`/aweme/${neighbors.next.aweme_id}`);
+          router.push(neighbors.next.href);
         }
       } else if (key === "arrowleft" || key === "a" || code === "KeyA") {
         e.preventDefault();