fix(RouterProvider): 将 goBack 重命名为 goHome，修复跨窗同步 merge 不一致

API 命名与实际行为（返回 dashboard）对齐；storage.onChanged 同步 visiblePages/pageOrder 时应用 mergeWithDefaults，与初始化逻辑保持一致。

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

src/components/TopBar.tsx

@@ -11,7 +11,7 @@ const SEARCH_HISTORY_LIMIT = 10;
 const SEARCH_HISTORY_DISPLAY = 5;
 
 export default function TopBar() {
-  const { currentPage, goBack, navigateTo } = useRouter();
+  const { currentPage, goHome, navigateTo } = useRouter();
   const { mode, setMode } = useThemeMode();
 
   const [searchQuery, setSearchQuery] = useState('');
@@ -138,8 +138,8 @@ export default function TopBar() {
         {!isDashboard && (
           <button
             type="button"
-            onClick={goBack}
-            aria-label={'返回'}
+            onClick={goHome}
+            aria-label={'返回首页'}
             className="flex h-8 w-8 items-center justify-center rounded-md border border-input bg-background text-muted-foreground shadow-sm transition-colors hover:bg-accent hover:text-accent-foreground"
           >
             <ArrowLeft className="h-4 w-4" />

src/components/__tests__/RouterContainer.test.tsx

@@ -12,7 +12,7 @@ const mockRouterValue = {
   isLoaded: true,
   navigateTo: vi.fn(),
   syncNavigation: vi.fn(),
-  goBack: vi.fn(),
+  goHome: vi.fn(),
   setVisiblePages: vi.fn(),
   setPageOrder: vi.fn(),
 };

src/components/__tests__/TopBar.test.tsx

@@ -27,7 +27,7 @@ const mockRouterValue = {
   isLoaded: true,
   navigateTo: vi.fn(),
   syncNavigation: vi.fn(),
-  goBack: vi.fn(),
+  goHome: vi.fn(),
   setVisiblePages: vi.fn(),
   setPageOrder: vi.fn(),
 };
@@ -54,7 +54,7 @@ describe('TopBar 组件', () => {
     it('不在 dashboard 时应渲染返回按钮', () => {
       mockRouterValue.currentPage = 'timestamp';
       renderWithProvider(<TopBar />);
-      expect(screen.getByLabelText('返回')).toBeInTheDocument();
+      expect(screen.getByLabelText('返回首页')).toBeInTheDocument();
     });
 
     it('在 dashboard 上不应渲染返回按钮', () => {
@@ -65,12 +65,12 @@ describe('TopBar 组件', () => {
   });
 
   describe('交互测试', () => {
-    it('点击返回按钮时应调用 goBack', () => {
+    it('点击返回按钮时应调用 goHome', () => {
       mockRouterValue.currentPage = 'timestamp';
       renderWithProvider(<TopBar />);
 
-      fireEvent.click(screen.getByLabelText('返回'));
-      expect(mockRouterValue.goBack).toHaveBeenCalledTimes(1);
+      fireEvent.click(screen.getByLabelText('返回首页'));
+      expect(mockRouterValue.goHome).toHaveBeenCalledTimes(1);
     });
   });
 });