合并主分支素材库多选更新

合入素材库多选操作与批量导出更新
保留画布生成配方分支改动并解决冲突

src/components/image-editor/ImageCanvasExportModel.test.ts

@@ -21,6 +21,12 @@ import {
 } from './ImageCanvasGenerationModel';
 
 describe('ImageCanvasExportModel', () => {
+  it('formats export timestamps through seconds', () => {
+    expect(formatExportDate(new Date(2026, 6, 27, 9, 8, 7))).toBe(
+      '20260727-090807',
+    );
+  });
+
   it('builds a real animated GIF preview from sequence frames', () => {
     const gifBytes = buildAnimatedGifPreviewBytes({
       width: 2,
@@ -68,8 +74,8 @@ describe('ImageCanvasExportModel', () => {
       '角色 草图',
     );
     expect(sanitizeExportFilePart('   ', 'fallback')).toBe('fallback');
-    expect(formatExportDate(new Date('2026-06-17T01:02:03.000Z'))).toBe(
-      '20260617',
+    expect(formatExportDate(new Date(2026, 5, 17, 9, 2, 3))).toBe(
+      '20260617-090203',
     );
   });
 
@@ -104,7 +110,26 @@ describe('ImageCanvasExportModel', () => {
           },
         ],
       }),
-    ).toBe('image-sequence:sequence-task');
+    ).toBe('image-sequence:task:sequence-task');
+    expect(
+      getLayerExportKey({
+        ...buildLayer(),
+        mediaType: 'image-sequence',
+        taskId: null,
+        sourceResourceId: null,
+        src: '',
+        imageSequenceFrames: [
+          {
+            imageSrc: '',
+            objectKey: 'private/animation-a/frame-01.png',
+            width: 1024,
+            height: 1024,
+          },
+        ],
+      }),
+    ).toBe(
+      'image-sequence:frames:["object-key:private/animation-a/frame-01.png"]',
+    );
   });
 
   it('detects image extensions from content type before falling back to src', () => {
@@ -307,7 +332,7 @@ describe('ImageCanvasExportModel', () => {
     try {
       const blob = await readLayerAssetBlob(
         buildLayer({
-          src: '/generated-editor-videos/video.mp4',
+          src: '',
           mediaType: 'video',
           objectKey: 'generated/video.mp4',
         }),