feat(timeline): 支持角色轨迹关键帧与轨道拖拽排序

src/editor/io/videoExport.ts

@@ -176,7 +176,8 @@ async function exportVideoFrameByFrame(view: VideoExportView): Promise<void> {
         directorStore.project.timeline.tracks,
         directorStore.project.timeline.cameraTracks,
         time,
-        usePlaybackStore.getState().editingObjectId
+        usePlaybackStore.getState().editingObjectId,
+        { objects: directorStore.project.objects, duration }
       );
       applyActiveCameraViewAtTime({
         camera: frameCamera,
@@ -248,11 +249,9 @@ async function exportVideoWithMediaRecorder(view: VideoExportView): Promise<void
   const directorStore = useDirectorStore.getState();
   const duration = directorStore.project.timeline.duration;
 
-  // 切视角 + 复位指针 + 录制模式（到末尾停住不循环）
+  // 切视角 + 复位指针（时间轴本身就是单次播放，到末尾会自己停住）
   directorStore.setViewMode(view);
-  const playback = usePlaybackStore.getState();
-  playback.setStopAtEnd(true);
-  playback.setPlayhead(0);
+  usePlaybackStore.getState().setPlayhead(0);
 
   const stopped = new Promise<void>((resolve) => {
     recorder.onstop = () => resolve();
@@ -263,7 +262,7 @@ async function exportVideoWithMediaRecorder(view: VideoExportView): Promise<void
   // 等两帧让视角切换 + 首帧渲染，避免录到上一视角的残影
   await waitNextFrame();
 
-  // 监听播放结束（stopAtEnd → isPlaying 置 false）→ 停止录制
+  // 监听播放结束（播到末帧 → isPlaying 置 false）→ 停止录制
   const unsubscribe = usePlaybackStore.subscribe((state) => {
     if (!state.isPlaying) {
       try {
@@ -289,7 +288,6 @@ async function exportVideoWithMediaRecorder(view: VideoExportView): Promise<void
   clearTimeout(fallbackTimer);
   unsubscribe();
 
-  usePlaybackStore.getState().setStopAtEnd(false);
   usePlaybackStore.getState().setPlaying(false);
 
   const viewLabel = view === "director" ? "上帝视角" : "机位视角";