支持素材生成上传参考图

图标素材生成支持上传普通参考图并提交到后端参考图数组。

UI设计图生成和UI素材提取支持上传参考图并写入生成输入记录。

同步前后端契约、OpenAPI、文档和相关单测。

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

@@ -184,6 +184,8 @@ function createStageProps(): ImageCanvasStageViewProps {
     onUiAssetExtractionPointerStart: vi.fn(),
     onUiAssetExtractionPointerMove: vi.fn(),
     onUiAssetExtractionPointerEnd: vi.fn(),
+    onRequestUiAssetExtractionReferenceUpload: vi.fn(),
+    onRemoveUiAssetExtractionReference: vi.fn(),
     onSubmitUiAssetExtraction: vi.fn(),
     onQuickEditSelectionToolChange: vi.fn(),
     onQuickEditSelectionPointerStart: vi.fn(),
@@ -297,6 +299,7 @@ describe('ImageCanvasEditorShellView', () => {
         tool: 'rect' as const,
         model: 'gemini-3.1-flash-image-preview',
         marks: [],
+        references: [],
         draftMark: null,
         status: 'idle' as const,
       },