修复画布素材标签菜单交互

素材标签菜单拦截滚轮事件，避免画布滚动抢占
点击菜单外空白区域自动关闭素材标签菜单
补充画布素材标签菜单交互测试

src/components/image-editor/ImageCanvasWorldView.test.tsx

@@ -823,6 +823,34 @@ describe('ImageCanvasWorldView', () => {
     );
   });
 
+  it('keeps the layer type menu scrollable and closes it when clicking outside', () => {
+    const layer = createLayer({ assetKind: 'character' });
+    const documentWheel = vi.fn();
+    document.addEventListener('wheel', documentWheel);
+
+    try {
+      renderWorldView({ layers: [layer] });
+
+      fireEvent.click(screen.getByRole('button', { name: '素材标签：角色' }));
+
+      const menu = screen.getByRole('menu', { name: '选择素材标签' });
+      fireEvent.wheel(menu, { deltaY: 120 });
+
+      expect(documentWheel).not.toHaveBeenCalled();
+      expect(screen.getByRole('menu', { name: '选择素材标签' })).toBeTruthy();
+
+      fireEvent.pointerDown(menu);
+      expect(screen.getByRole('menu', { name: '选择素材标签' })).toBeTruthy();
+
+      fireEvent.pointerDown(document.body);
+      expect(
+        screen.queryByRole('menu', { name: '选择素材标签' }),
+      ).toBeNull();
+    } finally {
+      document.removeEventListener('wheel', documentWheel);
+    }
+  });
+
   it('hides resolution and duration text for focused audio generation frames', () => {
     const dialog = createGenerationDialog({
       id: 'dialog-audio',

src/components/image-editor/ImageCanvasWorldView.tsx

@@ -651,6 +651,8 @@ export function ImageCanvasWorldView({
   const [openLayerKindMenuId, setOpenLayerKindMenuId] = useState<string | null>(
     null,
   );
+  const openLayerKindTriggerRef = useRef<HTMLSpanElement | null>(null);
+  const openLayerKindMenuRef = useRef<HTMLDivElement | null>(null);
   const visibleLayers = useMemo(
     () =>
       layers
@@ -660,6 +662,34 @@ export function ImageCanvasWorldView({
     [layers],
   );
 
+  useEffect(() => {
+    if (!openLayerKindMenuId) {
+      return undefined;
+    }
+
+    const closeKindMenuWhenClickingOutside = (event: PointerEvent) => {
+      const target = event.target;
+      if (!(target instanceof Node)) {
+        return;
+      }
+      if (
+        openLayerKindMenuRef.current?.contains(target) ||
+        openLayerKindTriggerRef.current?.contains(target)
+      ) {
+        return;
+      }
+      setOpenLayerKindMenuId(null);
+    };
+
+    document.addEventListener('pointerdown', closeKindMenuWhenClickingOutside);
+    return () => {
+      document.removeEventListener(
+        'pointerdown',
+        closeKindMenuWhenClickingOutside,
+      );
+    };
+  }, [openLayerKindMenuId]);
+
   return (
     <div
       className="image-canvas-editor__world"
@@ -755,6 +785,11 @@ export function ImageCanvasWorldView({
                 )}
                 {kindLabel ? (
                   <span
+                    ref={
+                      openLayerKindMenuId === layer.id
+                        ? openLayerKindTriggerRef
+                        : undefined
+                    }
                     role="button"
                     tabIndex={0}
                     aria-label={`素材标签：${kindLabel}`}
@@ -812,6 +847,7 @@ export function ImageCanvasWorldView({
               </LayerElement>
               {openLayerKindMenuId === layer.id ? (
                 <div
+                  ref={openLayerKindMenuRef}
                   className="image-canvas-editor__kind-menu-anchor"
                   style={{
                     left: layer.x + layer.width,
@@ -824,6 +860,8 @@ export function ImageCanvasWorldView({
                     label="选择素材标签"
                     placement="bottom-end"
                     className="image-canvas-editor__kind-menu"
+                    onWheelCapture={(event) => event.stopPropagation()}
+                    onWheel={(event) => event.stopPropagation()}
                   >
                     {CANVAS_ASSET_KIND_TAG_OPTIONS.map((option) => (
                       <PlatformFloatingMenuItem