合并图标规范与图集生成优化

合入 PR 137 的图标规范生成、稳定引用与图集提示词链路
保留主分支现行音效提交、Prompt 模块与结果压缩逻辑
解决 External Worker、生成提交和客户端测试冲突

src/components/image-editor/ImageCanvasEditorModel.test.ts

@@ -1804,6 +1804,18 @@ describe('ImageCanvasEditorModel', () => {
     ).toBeUndefined();
   });
 
+  it('migrates restored legacy ui specs to the icon spec flow', () => {
+    expect(
+      hydrateCanvasGenerationDialog({
+        id: 'generation-dialog-legacy-ui-spec',
+        mode: 'spec',
+        prompt: '',
+        status: 'idle',
+        specType: 'ui',
+      })?.specType,
+    ).toBe('icon');
+  });
+
   it('drops restored generator references owned by another user', () => {
     const dialog: CanvasGenerationDialogState = {
       id: 'generation-dialog-owner',