新增后台Dashboard并修正画板规范图选择

新增后台 Dashboard 默认入口、日周月筛选和运营汇总页签

补充后台 Dashboard 数据契约、接口统计和文档

修正画板角色与图标规范图选择、缓存和提示状态

修复创作页桌面导航类型收窄错误

更新 Codex 环境初始化脚本和相关回归测试记录

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

@@ -540,20 +540,35 @@ describe('ImageCanvasGenerationDialogModel', () => {
       characterReferences: [],
     };
     const sourceLayer = createLayer({ title: '参考图' });
+    const characterSpecLayer = createLayer({
+      title: '角色规范',
+      assetKind: 'spec',
+    });
 
-    expect(assignCharacterSpecReference(characterDialog, sourceLayer)).toEqual(
+    expect(
+      assignCharacterSpecReference(characterDialog, characterSpecLayer),
+    ).toEqual(
       expect.objectContaining({
         status: 'idle',
         errorMessage: undefined,
         composerOpen: true,
         characterSpecReference: expect.objectContaining({
           id: 'canvas-layer-source',
-          label: '参考图',
+          label: '角色规范',
           src: 'data:image/png;base64,source',
           resourceId: 'resource-source',
         }),
       }),
     );
+    expect(assignCharacterSpecReference(characterDialog, sourceLayer)).toBe(
+      characterDialog,
+    );
+    expect(
+      assignCharacterSpecReference(
+        characterDialog,
+        createLayer({ title: '角色形象', assetKind: 'character' }),
+      ),
+    ).toBe(characterDialog);
     expect(
       appendCharacterReference(characterDialog, sourceLayer),
     ).toMatchObject({