修复资源画本转场快照丢失卡片预览图

快照克隆原先直接复制 blob: 对象 URL，源卡片卸载或预览缓存驱逐后该 URL 被 revoke，克隆里的图片随即失效，表现为进入/退出子画布时卡片框在动而图片不跟着展开和复原
对 blob: 来源且已解码的图片在克隆时栅格化为 data URL 冻结，与既有视频快照处理保持一致
补充 resourceBookController 快照图片冻结回归用例

apps/ai-game-creator-shell/src/view/project-development/resourceBookController.ts

@@ -23,6 +23,26 @@ function validRect(rect: Snapshot['rect']) {
   );
 }
 
+// 卡片预览用 object URL 渲染；源节点卸载或预览缓存驱逐会 revoke 掉它。
+// 快照必须自带像素，否则展开/复原过程中图片会直接消失。
+function freezeBlobImageSource(image: HTMLImageElement) {
+  const source = image.currentSrc || image.getAttribute('src') || '';
+  if (!source.startsWith('blob:')) return null;
+  if (!image.complete || image.naturalWidth <= 0 || image.naturalHeight <= 0)
+    return null;
+  try {
+    const canvas = document.createElement('canvas');
+    canvas.width = image.naturalWidth;
+    canvas.height = image.naturalHeight;
+    const context = canvas.getContext('2d');
+    if (!context) return null;
+    context.drawImage(image, 0, 0);
+    return canvas.toDataURL();
+  } catch {
+    return null;
+  }
+}
+
 // Freeze presentation only. Clones cannot expose duplicate controls, replay
 // media, or depend on CSS selectors belonging to the old ancestor tree.
 function clonePresentation(
@@ -74,6 +94,10 @@ function clonePresentation(
     copy.style.animation = 'none';
     copy.style.pointerEvents = 'none';
     copy.setAttribute('tabindex', '-1');
+    if (original instanceof HTMLImageElement) {
+      const frozen = freezeBlobImageSource(original);
+      if (frozen) copy.setAttribute('src', frozen);
+    }
     if (copy instanceof HTMLMediaElement) {
       copy.removeAttribute('src');
       copy.querySelectorAll('source').forEach((item) => item.remove());

apps/ai-game-creator-shell/tests/resourceBookController.test.ts

@@ -23,7 +23,7 @@ function rect(left = 0, top = 0, width = 100, height = 80): DOMRect {
 function fixture() {
   const root = document.createElement('div');
   root.innerHTML = `<div class="game-resource-book-scene"><div class="game-resource-book-scene-world">
-    <div class="game-resource-card" data-resource-card-id="one"><button id="original">Open</button></div>
+    <div class="game-resource-card" data-resource-card-id="one"><img src="blob:card-preview" alt="" /><button id="original">Open</button></div>
     </div></div><div class="game-resource-book-transition-layer" inert aria-hidden="true"></div>`;
   document.body.append(root);
   vi.spyOn(root, 'getBoundingClientRect').mockReturnValue(rect(0, 0, 800, 600));
@@ -100,6 +100,44 @@ describe('resource book FLIP controller', () => {
     controller.dispose();
   });
 
+  it('freezes blob-backed card previews into the snapshot', () => {
+    const { root, measure } = setup();
+    const image = root.querySelector<HTMLImageElement>(
+      '.game-resource-card img',
+    )!;
+    Object.defineProperty(image, 'complete', {
+      configurable: true,
+      value: true,
+    });
+    Object.defineProperty(image, 'naturalWidth', {
+      configurable: true,
+      value: 8,
+    });
+    Object.defineProperty(image, 'naturalHeight', {
+      configurable: true,
+      value: 6,
+    });
+    vi.spyOn(HTMLCanvasElement.prototype, 'getContext').mockReturnValue({
+      drawImage: vi.fn(),
+    } as unknown as CanvasRenderingContext2D);
+    vi.spyOn(HTMLCanvasElement.prototype, 'toDataURL').mockReturnValue(
+      'data:image/png;base64,FROZEN',
+    );
+
+    const controller = createResourceBookTransitionController();
+    const token = controller.begin(root);
+    measure.mockReturnValue(rect(150, 100, 200, 160));
+    controller.play(root, token, () => undefined);
+
+    const snapshotImage = root.querySelector<HTMLImageElement>(
+      '.game-resource-book-transition-layer img',
+    );
+    expect(snapshotImage?.getAttribute('src')).toBe(
+      'data:image/png;base64,FROZEN',
+    );
+    controller.dispose();
+  });
+
   it('retargets from the current overlay geometry and ignores old completion', async () => {
     const { root, measure, flights } = setup();
     const controller = createResourceBookTransitionController();