补齐单选素材导出成功提示

让单素材导出返回浏览器下载是否已触发

仅在选中素材下载成功后展示成功状态

新增单选下载成功提示断言

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

@@ -154,6 +154,9 @@ describe('useImageCanvasAssetExportWorkflow', () => {
       fireEvent.click(screen.getByRole('button', { name: '下载一个选中素材' }));
       await waitFor(() => expect(downloads).toHaveLength(1));
       expect(downloads[0]?.name).toMatch(/^素材A-\d{8}-\d{6}\.png$/u);
+      expect(screen.getByTestId('status').textContent).toBe(
+        'success:选中素材已导出',
+      );
 
       fireEvent.click(screen.getByRole('button', { name: '下载多个选中素材' }));
       await waitFor(() => expect(downloads).toHaveLength(2));

src/components/image-editor/useImageCanvasAssetExportWorkflow.ts

@@ -282,7 +282,7 @@ export function useImageCanvasAssetExportWorkflow({
     ) => {
       const exportMode = options.mode ?? 'spine-json';
       if (!layer) {
-        return;
+        return false;
       }
       if (layer.mediaType === 'image-sequence') {
         try {
@@ -300,13 +300,14 @@ export function useImageCanvasAssetExportWorkflow({
               message: '当前浏览器不支持素材下载',
             });
           }
+          return downloaded;
         } catch {
           setAssetExportStatus({
             tone: 'error',
             message: '序列帧导出失败',
           });
+          return false;
         }
-        return;
       }
 
       try {
@@ -326,11 +327,13 @@ export function useImageCanvasAssetExportWorkflow({
             message: '当前浏览器不支持素材下载',
           });
         }
+        return downloaded;
       } catch {
         setAssetExportStatus({
           tone: 'error',
           message: '素材导出失败',
         });
+        return false;
       }
     },
     [],
@@ -649,7 +652,15 @@ export function useImageCanvasAssetExportWorkflow({
         setIsExportingAssets(true);
         setAssetExportStatus(null);
         try {
-          await exportLayerImage(exportableLayers[0] ?? null);
+          const downloaded = await exportLayerImage(
+            exportableLayers[0] ?? null,
+          );
+          if (downloaded) {
+            setAssetExportStatus({
+              tone: 'success',
+              message: '选中素材已导出',
+            });
+          }
         } finally {
           isExportingAssetsRef.current = false;
           setIsExportingAssets(false);