feat(timeline): 支持逐切点机位过渡与概览轨编辑

src/editor/store/directorStore.ts

@@ -51,6 +51,7 @@ import {
   updateCameraKeyframeTime as updateTimelineCameraKeyframeTime,
   updateCameraKeyframeValue as updateTimelineCameraKeyframeValue,
   updateCameraKeyframeEasing as updateTimelineCameraKeyframeEasing,
+  setCameraKeyframeTransition as setTimelineCameraKeyframeTransition,
   setCameraKeyframeTimes as setTimelineCameraKeyframeTimes,
   updateTimelineDuration,
   updateTimelinePlaybackSettings,
@@ -283,6 +284,7 @@ export interface DirectorActions {
   updateCameraKeyframeTime: (cameraId: string, keyframeId: string, time: number) => void;
   updateCameraKeyframeValue: (cameraId: string, keyframeId: string, value: CameraKeyframeValue) => void;
   updateCameraKeyframeEasing: (cameraId: string, keyframeId: string, easing: EasingKind) => void;
+  setCameraKeyframeTransition: (cameraId: string, keyframeId: string, transition: CameraTransition | null) => void;
   /** 一次性覆盖整条运镜的所有关键帧时间（拖动「运镜时长」把手按比例缩放用） */
   setCameraKeyframeTimes: (cameraId: string, times: number[]) => void;
   applyCameraKeyframeToShot: (cameraId: string, value: CameraKeyframeValue) => void;
@@ -3324,6 +3326,14 @@ export const useDirectorStore = create<DirectorStore>((set, get) => {
           timeline: updateTimelineCameraKeyframeEasing(state.project.timeline, cameraId, keyframeId, easing),
         },
       })),
+    setCameraKeyframeTransition: (cameraId, keyframeId, transition) =>
+      commitMutation((state) => ({
+        ...state,
+        project: {
+          ...state.project,
+          timeline: setTimelineCameraKeyframeTransition(state.project.timeline, cameraId, keyframeId, transition),
+        },
+      })),
     setCameraKeyframeTimes: (cameraId, times) =>
       commitMutation((state) => ({
         ...state,