feat(canvas): Agent引用与局部重绘 - 完善附件预览多图展开并修复取消清理

Co-authored-by: Cursor <cursoragent@cursor.com>

web/test/canvas-image-source.test.ts

@@ -47,6 +47,11 @@ describe("上传图片是输入素材", () => {
         expect(portrait).toContain("fromNodeId: node.id, toNodeId: child.id");
         expect(portrait).toContain("setDialogNodeId(child.id)");
         expect(portrait).not.toContain("current.map");
+        expect(mediaTools).toContain("payload.generationConfig");
+        expect(mediaTools).toContain("imageBatchExpanded: requestedCount > 1 ? true : undefined");
+        const dialog = read("components/canvas/canvas-node-mask-edit-dialog.tsx");
+        expect(dialog).toContain("ModelPicker");
+        expect(dialog).toContain("ImageSettingsPanel");
     });
 });