refactor: 重构 TopBar 组件并更新项目结构

- 删除原有的 TopBar 组件，重构为布局组件并移动至 layout/ 目录。
- 更新相关文档，反映 TopBar 组件的新位置。
- 引入新的 useTopBar 钩子以管理 TopBar 的状态和逻辑。
- 添加 TopBar 组件的单元测试，确保功能正常。

src/components/README.md

@@ -6,7 +6,6 @@
 
 | 组件                    | 用途                                                                           |
 | ----------------------- | ------------------------------------------------------------------------------ |
-| `TopBar.tsx`            | 顶部导航栏，集成搜索（含历史记录）、主题切换、语言切换、返回导航               |
 | `RouterContainer.tsx`   | 路由容器，根据当前路由动态渲染对应页面组件，集成错误边界和骨架屏               |
 | `SwitchButtonGroup.tsx` | 通用切换按钮组，支持 `small/medium/large` 三种尺寸，用于页面子模式切换         |
 | `TextInputArea.tsx`     | 增强文本输入区域，支持校验规则、工具栏操作、字符计数、清空                     |

src/components/TopBar.tsx

@@ -1,315 +0,0 @@
-import React, { useEffect, useMemo, useRef, useState } from 'react';
-import { ArrowLeft, ExternalLink, Monitor, Moon, Search, Sun, X } from 'lucide-react';
-import { useRouter } from '@/providers/RouterProvider';
-import { useThemeMode } from '@/providers/ThemeModeProvider';
-import { FeatureConfig, FEATURES } from '@/config/features';
-import { storageUtil } from '@/utils/chromeStorage';
-import { openExtensionPage } from '@/utils/chromeTabs';
-import { cn } from '@/lib/utils';
-
-const SEARCH_HISTORY_LIMIT = 10;
-const SEARCH_HISTORY_DISPLAY = 5;
-
-export default function TopBar() {
-  const { currentPage, goHome, navigateTo } = useRouter();
-  const { mode, setMode } = useThemeMode();
-
-  const [searchQuery, setSearchQuery] = useState('');
-  const [showResults, setShowResults] = useState(false);
-  const [searchHistory, setSearchHistory] = useState<string[]>([]);
-  const [selectedIndex, setSelectedIndex] = useState(-1);
-
-  const containerRef = useRef<HTMLDivElement>(null);
-  const inputRef = useRef<HTMLInputElement>(null);
-
-  const handleOpenInTab = async () => {
-    await openExtensionPage('popup.html', { mode: 'tab' });
-    window.close();
-  };
-
-  useEffect(() => {
-    const handleClickOutside = (event: MouseEvent) => {
-      if (containerRef.current && !containerRef.current.contains(event.target as Node)) {
-        setShowResults(false);
-      }
-    };
-    document.addEventListener('mousedown', handleClickOutside);
-    return () => document.removeEventListener('mousedown', handleClickOutside);
-  }, []);
-
-  // Cmd/Ctrl+K 快捷键聚焦搜索框
-  useEffect(() => {
-    const handleGlobalKeyDown = (e: KeyboardEvent) => {
-      if ((e.metaKey || e.ctrlKey) && e.key === 'k') {
-        e.preventDefault();
-        inputRef.current?.focus();
-        setShowResults(true);
-      }
-    };
-    document.addEventListener('keydown', handleGlobalKeyDown);
-    return () => document.removeEventListener('keydown', handleGlobalKeyDown);
-  }, []);
-
-  useEffect(() => {
-    storageUtil
-      .get('app/searchHistory', [])
-      .then((history) => {
-        if (history) setSearchHistory(history);
-      })
-      .catch((err) => console.error('加载搜索历史失败:', err));
-  }, []);
-
-  const searchResults = useMemo(() => {
-    const query = searchQuery.trim().toLowerCase();
-    if (!query) return [];
-    return FEATURES.filter((f) => {
-      if (f.key === 'dashboard') return false;
-      return f.label.toLowerCase().includes(query) || f.description.toLowerCase().includes(query);
-    });
-  }, [searchQuery]);
-
-  const displayedHistory = useMemo(() => {
-    if (searchQuery.trim()) return [];
-    return searchHistory
-      .slice(0, SEARCH_HISTORY_DISPLAY)
-      .map((key) => ({ key, feature: FEATURES.find((f) => f.key === key) }))
-      .filter((item) => item.feature && item.feature.key !== 'dashboard');
-  }, [searchHistory, searchQuery]);
-
-  const saveToHistory = async (featureKey: string) => {
-    if (!featureKey.trim()) return;
-    const nextHistory = [featureKey, ...searchHistory.filter((h) => h !== featureKey)].slice(
-      0,
-      SEARCH_HISTORY_LIMIT,
-    );
-    setSearchHistory(nextHistory);
-    await storageUtil.set('app/searchHistory', nextHistory).catch((err) => console.error(err));
-  };
-
-  const handleSelectFeature = (feature: FeatureConfig) => {
-    navigateTo(feature.key);
-    saveToHistory(feature.key);
-    setSearchQuery('');
-    setShowResults(false);
-  };
-
-  const cycleThemeMode = () => {
-    const nextMap = { light: 'dark', dark: 'system', system: 'light' } as const;
-    setMode(nextMap[mode]);
-  };
-
-  const ThemeIcon = mode === 'light' ? Sun : mode === 'dark' ? Moon : Monitor;
-
-  const handleKeyDown = (e: React.KeyboardEvent) => {
-    const totalItems = searchQuery.trim() ? searchResults.length : displayedHistory.length;
-
-    if (e.key === 'ArrowDown') {
-      e.preventDefault();
-      setSelectedIndex((prev) => (prev < totalItems - 1 ? prev + 1 : prev));
-    } else if (e.key === 'ArrowUp') {
-      e.preventDefault();
-      setSelectedIndex((prev) => (prev > 0 ? prev - 1 : prev));
-    } else if (e.key === 'Enter') {
-      e.preventDefault();
-      if (selectedIndex >= 0 && selectedIndex < totalItems) {
-        if (searchQuery.trim()) {
-          handleSelectFeature(searchResults[selectedIndex]);
-        } else {
-          const selected = displayedHistory[selectedIndex];
-          if (selected?.feature) {
-            handleSelectFeature(selected.feature);
-          }
-        }
-      } else if (searchQuery.trim() && searchResults.length > 0) {
-        handleSelectFeature(searchResults[0]);
-      }
-    } else if (e.key === 'Escape') {
-      setShowResults(false);
-      inputRef.current?.blur();
-    }
-  };
-
-  const isDashboard = currentPage === 'dashboard';
-
-  return (
-    <header className="flex h-14 items-center justify-between border-b border-border bg-background px-4 relative z-50">
-      {/* 左侧：返回按钮区 */}
-      <div className="flex w-10 items-center justify-start">
-        {!isDashboard && (
-          <button
-            type="button"
-            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" />
-          </button>
-        )}
-      </div>
-
-      {/* 中间：搜索容器 */}
-      <div ref={containerRef} className="flex-1 mx-4 max-w-md relative">
-        <div className="relative group">
-          <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground/60 group-focus-within:text-muted-foreground transition-colors pointer-events-none" />
-          <input
-            ref={inputRef}
-            type="text"
-            placeholder={'搜索工具...'}
-            value={searchQuery}
-            onChange={(e) => {
-              setSearchQuery(e.target.value);
-              setShowResults(true);
-              setSelectedIndex(-1);
-            }}
-            onFocus={() => setShowResults(true)}
-            onKeyDown={handleKeyDown}
-            aria-label={'搜索工具...'}
-            className="w-full h-9 pl-9 pr-16 text-sm rounded-lg border border-border/60 bg-muted/40 transition-all placeholder:text-muted-foreground/50 focus:bg-background focus:outline-none focus:ring-1 focus:ring-ring focus:border-input"
-          />
-          {!searchQuery && (
-            <kbd className="absolute right-3 top-1/2 -translate-y-1/2 hidden sm:inline-flex h-5 items-center gap-0.5 rounded border border-border/60 bg-muted px-1.5 font-mono text-[10px] font-medium text-muted-foreground/60 pointer-events-none">
-              ⌘K
-            </kbd>
-          )}
-          {searchQuery && (
-            <button
-              type="button"
-              onClick={() => {
-                setSearchQuery('');
-                setSelectedIndex(-1);
-              }}
-              aria-label={'清除搜索'}
-              className="absolute right-2 top-1/2 -translate-y-1/2 p-1 rounded-md text-muted-foreground hover:text-foreground transition-colors"
-            >
-              <X className="h-3 w-3" />
-            </button>
-          )}
-        </div>
-
-        {/* 动态联想结果卡片 */}
-        {showResults && (searchQuery.trim() || displayedHistory.length > 0) && (
-          <div className="absolute top-full left-0 right-0 mt-1.5 bg-popover text-popover-foreground rounded-lg shadow-lg border border-border max-h-80 overflow-y-auto z-50 animate-in fade-in slide-in-from-top-2 duration-150">
-            <ul role="listbox" className="p-1.5">
-              {searchQuery.trim() ? (
-                searchResults.length > 0 ? (
-                  searchResults.map((feature, index) => (
-                    <li
-                      key={feature.key}
-                      role="option"
-                      aria-selected={selectedIndex === index}
-                      onClick={() => handleSelectFeature(feature)}
-                      className={cn(
-                        'flex items-center gap-3 px-3 py-2.5 rounded-md cursor-pointer text-sm transition-colors',
-                        selectedIndex === index
-                          ? 'bg-accent text-accent-foreground'
-                          : 'hover:bg-muted/60',
-                      )}
-                    >
-                      <div
-                        className={cn(
-                          'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
-                          'bg-muted/80 text-muted-foreground',
-                        )}
-                      >
-                        {feature.icon && <feature.icon className="h-4 w-4" />}
-                      </div>
-                      <div className="flex-1 min-w-0">
-                        <p className="font-medium text-foreground truncate">{feature.label}</p>
-                        <p className="text-xs text-muted-foreground truncate mt-0.5">
-                          {feature.description}
-                        </p>
-                      </div>
-                    </li>
-                  ))
-                ) : (
-                  <li className="px-4 py-6 text-center text-sm text-muted-foreground">
-                    {'未找到相关工具'}
-                  </li>
-                )
-              ) : (
-                <>
-                  <div className="px-3 py-1.5 text-[11px] font-semibold tracking-wider text-muted-foreground/60 uppercase">
-                    {'最近搜索'}
-                  </div>
-                  {displayedHistory.map((item, index) => (
-                    <li
-                      key={item.key}
-                      role="option"
-                      aria-selected={selectedIndex === index}
-                      onClick={() => item.feature && handleSelectFeature(item.feature)}
-                      className={cn(
-                        'flex items-center gap-3 px-3 py-2 rounded-md cursor-pointer text-sm transition-colors',
-                        selectedIndex === index
-                          ? 'bg-accent text-accent-foreground'
-                          : 'hover:bg-muted/60',
-                      )}
-                    >
-                      <div
-                        className={cn(
-                          'flex h-8 w-8 shrink-0 items-center justify-center rounded-lg',
-                          'bg-muted/80 text-muted-foreground',
-                        )}
-                      >
-                        {item.feature?.icon && <item.feature.icon className="h-4 w-4" />}
-                      </div>
-                      <div className="flex-1 min-w-0">
-                        <p className="font-medium text-foreground truncate">
-                          {item.feature?.label}
-                        </p>
-                        <p className="text-xs text-muted-foreground truncate mt-0.5">
-                          {item.feature?.description}
-                        </p>
-                      </div>
-                    </li>
-                  ))}
-                </>
-              )}
-            </ul>
-          </div>
-        )}
-      </div>
-
-      {/* 右侧：操作区 */}
-      <div className="flex items-center gap-1 shrink-0">
-        <IconButton
-          onClick={cycleThemeMode}
-          title={
-            mode === 'light'
-              ? '切换到深色模式'
-              : mode === 'dark'
-                ? '切换到系统模式'
-                : '切换到浅色模式'
-          }
-        >
-          <ThemeIcon className="h-4 w-4" />
-        </IconButton>
-        <IconButton onClick={handleOpenInTab} title={'在标签页打开'}>
-          <ExternalLink className="h-4 w-4" />
-        </IconButton>
-      </div>
-    </header>
-  );
-}
-
-// 5. 提炼出高度复用的原子按钮，大幅精简 Tailwind 冗余，符合 shadcn 的灵巧风格
-function IconButton({
-  children,
-  onClick,
-  title,
-}: {
-  children: React.ReactNode;
-  onClick: () => void;
-  title: string;
-}) {
-  return (
-    <button
-      type="button"
-      onClick={onClick}
-      title={title}
-      aria-label={title}
-      className="flex h-8 w-8 items-center justify-center rounded-md text-muted-foreground transition-colors hover:bg-accent hover:text-accent-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
-    >
-      {children}
-    </button>
-  );
-}

src/entrypoints/README.md

@@ -17,10 +17,10 @@ WXT 框架要求的扩展生命周期入口点，对应 Chrome Extension 的各
 Popup 弹窗页面（点击扩展图标弹出）。
 
 | 文件         | 用途                                                                                  |
-| ------------ | ------------------------------------------------------------------------------ |
+| ------------ | ------------------------------------------------------------------------------------- |
 | `index.html` | HTML 入口                                                                             |
 | `main.tsx`   | React 挂载点                                                                          |
-| `App.tsx`    | 根组件，组装 `RouterProvider` + `TopBar` + `ErrorBoundary` + `RouterContainer` |
+| `App.tsx`    | 根组件，组装 `RouterProvider` + `layout/TopBar` + `ErrorBoundary` + `RouterContainer` |
 
 ### sidepanel/
 

src/entrypoints/popup/App.tsx

@@ -1,5 +1,5 @@
 import RouterProvider from '@/providers/RouterProvider';
-import TopBar from '@/components/TopBar';
+import TopBar from '@/layout/TopBar';
 import RouterContainer from '@/components/RouterContainer';
 import ErrorBoundary from '@/components/ErrorBoundary';
 import { getEntryPointType } from '@/config/features';

src/entrypoints/sidepanel/App.tsx

@@ -1,6 +1,6 @@
 import { useEffect } from 'react';
 import RouterProvider from '@/providers/RouterProvider';
-import TopBar from '@/components/TopBar';
+import TopBar from '@/layout/TopBar';
 import RouterContainer from '@/components/RouterContainer';
 import ErrorBoundary from '@/components/ErrorBoundary';
 import { MessageAction, sendMessage } from '@/utils/messages';

src/layout/README.md

@@ -0,0 +1,22 @@
+# layout/
+
+应用壳层布局组件目录，存放与扩展入口（popup / sidepanel / tab）绑定的布局 UI，与 `components/` 中的通用可复用组件区分。
+
+## 组件列表
+
+| 目录      | 用途                                                           |
+| --------- | -------------------------------------------------------------- |
+| `TopBar/` | 顶部导航栏：搜索（含历史记录）、主题切换、返回导航、标签页打开 |
+
+## 目录结构
+
+遵循与 `pages/` 相同的 UI + Hook 分离模式：
+
+```
+layout/TopBar/
+├── index.tsx       # 布局 UI
+├── useTopBar.ts    # 业务逻辑 Hook
+├── constants.ts    # 常量
+└── __tests__/
+    └── index.test.tsx
+```

src/layout/TopBar/__tests__/index.test.tsx

@@ -2,7 +2,7 @@ import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { fireEvent, render, screen } from '@testing-library/react';
 import type { PageType } from '@/types/storage';
 import React from 'react';
-import TopBar from '@/components/TopBar';
+import TopBar from '@/layout/TopBar';
 import { RouterProvider } from '@/providers/RouterProvider';
 import { ThemeModeProvider } from '@/providers/ThemeModeProvider';
 
@@ -60,7 +60,7 @@ describe('TopBar 组件', () => {
     it('在 dashboard 上不应渲染返回按钮', () => {
       mockRouterValue.currentPage = 'dashboard';
       renderWithProvider(<TopBar />);
-      expect(screen.queryByLabelText('返回')).not.toBeInTheDocument();
+      expect(screen.queryByLabelText('返回首页')).not.toBeInTheDocument();
     });
   });
 

src/layout/TopBar/constants.ts

@@ -0,0 +1,2 @@
+export const SEARCH_HISTORY_LIMIT = 10;
+export const SEARCH_HISTORY_DISPLAY = 5;

src/layout/TopBar/index.tsx

@@ -0,0 +1,180 @@
+import React from 'react';
+import { ArrowLeft, ExternalLink, Search, X } from 'lucide-react';
+import { type FeatureConfig } from '@/config/features';
+import { cn } from '@/lib/utils';
+import { useTopBar } from './useTopBar';
+
+export default function TopBar() {
+  const {
+    searchQuery,
+    showResults,
+    searchResults,
+    displayedHistory,
+    selectedIndex,
+    isDashboard,
+    ThemeIcon,
+    themeTitle,
+    containerRef,
+    inputRef,
+    setSearchQuery,
+    setShowResults,
+    setSelectedIndex,
+    handleSelectFeature,
+    handleKeyDown,
+    cycleThemeMode,
+    handleOpenInTab,
+    goHome,
+    clearSearch,
+  } = useTopBar();
+
+  return (
+    <header className="relative z-50 flex h-14 items-center justify-between border-b border-border bg-background px-4">
+      <div className="flex w-10 items-center justify-start">
+        {!isDashboard && (
+          <button
+            type="button"
+            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" />
+          </button>
+        )}
+      </div>
+
+      <div ref={containerRef} className="relative mx-4 max-w-md flex-1">
+        <div className="group relative">
+          <Search className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground/60 transition-colors group-focus-within:text-muted-foreground" />
+          <input
+            ref={inputRef}
+            type="text"
+            placeholder="搜索工具..."
+            value={searchQuery}
+            onChange={(e) => {
+              setSearchQuery(e.target.value);
+              setShowResults(true);
+              setSelectedIndex(-1);
+            }}
+            onFocus={() => setShowResults(true)}
+            onKeyDown={handleKeyDown}
+            aria-label="搜索工具..."
+            className="h-9 w-full rounded-lg border border-border/60 bg-muted/40 pl-9 pr-16 text-sm transition-all placeholder:text-muted-foreground/50 focus:border-input focus:bg-background focus:outline-none focus:ring-1 focus:ring-ring"
+          />
+          {!searchQuery && (
+            <kbd className="pointer-events-none absolute right-3 top-1/2 hidden h-5 -translate-y-1/2 items-center gap-0.5 rounded border border-border/60 bg-muted px-1.5 font-mono text-[10px] font-medium text-muted-foreground/60 sm:inline-flex">
+              ⌘K
+            </kbd>
+          )}
+          {searchQuery && (
+            <button
+              type="button"
+              onClick={clearSearch}
+              aria-label="清除搜索"
+              className="absolute right-2 top-1/2 -translate-y-1/2 rounded-md p-1 text-muted-foreground transition-colors hover:text-foreground"
+            >
+              <X className="h-3 w-3" />
+            </button>
+          )}
+        </div>
+
+        {showResults && (searchQuery.trim() || displayedHistory.length > 0) && (
+          <div className="absolute left-0 right-0 top-full z-50 mt-1.5 max-h-80 overflow-y-auto rounded-lg border border-border bg-popover text-popover-foreground shadow-lg animate-in fade-in slide-in-from-top-2 duration-150">
+            <ul role="listbox" className="p-1.5">
+              {searchQuery.trim() ? (
+                searchResults.length > 0 ? (
+                  searchResults.map((feature, index) => (
+                    <SearchResultItem
+                      key={feature.key}
+                      feature={feature}
+                      selected={selectedIndex === index}
+                      onSelect={handleSelectFeature}
+                    />
+                  ))
+                ) : (
+                  <li className="px-4 py-6 text-center text-sm text-muted-foreground">
+                    未找到相关工具
+                  </li>
+                )
+              ) : (
+                <>
+                  <div className="px-3 py-1.5 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/60">
+                    最近搜索
+                  </div>
+                  {displayedHistory.map((item, index) =>
+                    item.feature ? (
+                      <SearchResultItem
+                        key={item.key}
+                        feature={item.feature}
+                        selected={selectedIndex === index}
+                        onSelect={handleSelectFeature}
+                      />
+                    ) : null,
+                  )}
+                </>
+              )}
+            </ul>
+          </div>
+        )}
+      </div>
+
+      <div className="flex shrink-0 items-center gap-1">
+        <IconButton onClick={cycleThemeMode} title={themeTitle}>
+          <ThemeIcon className="h-4 w-4" />
+        </IconButton>
+        <IconButton onClick={handleOpenInTab} title="在标签页打开">
+          <ExternalLink className="h-4 w-4" />
+        </IconButton>
+      </div>
+    </header>
+  );
+}
+
+interface SearchResultItemProps {
+  feature: FeatureConfig;
+  selected: boolean;
+  onSelect: (feature: FeatureConfig) => void;
+}
+
+function SearchResultItem({ feature, selected, onSelect }: SearchResultItemProps) {
+  return (
+    <li
+      role="option"
+      aria-selected={selected}
+      onClick={() => onSelect(feature)}
+      className={cn(
+        'flex cursor-pointer items-center gap-3 rounded-md px-3 py-2.5 text-sm transition-colors',
+        selected ? 'bg-accent text-accent-foreground' : 'hover:bg-muted/60',
+      )}
+    >
+      <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-lg bg-muted/80 text-muted-foreground">
+        {feature.icon && <feature.icon className="h-4 w-4" />}
+      </div>
+      <div className="min-w-0 flex-1">
+        <p className="truncate font-medium text-foreground">{feature.label}</p>
+        <p className="mt-0.5 truncate text-xs text-muted-foreground">{feature.description}</p>
+      </div>
+    </li>
+  );
+}
+
+function IconButton({
+  children,
+  onClick,
+  title,
+}: {
+  children: React.ReactNode;
+  onClick: () => void;
+  title: string;
+}) {
+  return (
+    <button
+      type="button"
+      onClick={onClick}
+      title={title}
+      aria-label={title}
+      className="flex h-8 w-8 items-center justify-center rounded-md text-muted-foreground transition-colors hover:bg-accent hover:text-accent-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
+    >
+      {children}
+    </button>
+  );
+}

src/layout/TopBar/useTopBar.ts

@@ -0,0 +1,191 @@
+import { useEffect, useMemo, useRef, useState, type RefObject } from 'react';
+import { Monitor, Moon, Sun } from 'lucide-react';
+import { useRouter } from '@/providers/RouterProvider';
+import { useThemeMode } from '@/providers/ThemeModeProvider';
+import { type FeatureConfig, FEATURES } from '@/config/features';
+import { storageUtil } from '@/utils/chromeStorage';
+import { openExtensionPage } from '@/utils/chromeTabs';
+import { SEARCH_HISTORY_DISPLAY, SEARCH_HISTORY_LIMIT } from './constants';
+
+export interface HistoryItem {
+  key: string;
+  feature?: FeatureConfig;
+}
+
+export interface UseTopBarReturn {
+  searchQuery: string;
+  showResults: boolean;
+  searchResults: FeatureConfig[];
+  displayedHistory: HistoryItem[];
+  selectedIndex: number;
+  isDashboard: boolean;
+  ThemeIcon: typeof Sun;
+  themeTitle: string;
+  containerRef: RefObject<HTMLDivElement | null>;
+  inputRef: RefObject<HTMLInputElement | null>;
+  setSearchQuery: (value: string) => void;
+  setShowResults: (value: boolean) => void;
+  setSelectedIndex: (value: number | ((prev: number) => number)) => void;
+  handleSelectFeature: (feature: FeatureConfig) => void;
+  handleKeyDown: (e: React.KeyboardEvent) => void;
+  cycleThemeMode: () => void;
+  handleOpenInTab: () => Promise<void>;
+  goHome: () => void;
+  clearSearch: () => void;
+}
+
+export function useTopBar(): UseTopBarReturn {
+  const { currentPage, goHome, navigateTo } = useRouter();
+  const { mode, setMode } = useThemeMode();
+
+  const [searchQuery, setSearchQuery] = useState('');
+  const [showResults, setShowResults] = useState(false);
+  const [searchHistory, setSearchHistory] = useState<string[]>([]);
+  const [selectedIndex, setSelectedIndex] = useState(-1);
+
+  const containerRef = useRef<HTMLDivElement>(null);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  const handleOpenInTab = async () => {
+    await openExtensionPage('popup.html', { mode: 'tab' });
+    window.close();
+  };
+
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (containerRef.current && !containerRef.current.contains(event.target as Node)) {
+        setShowResults(false);
+      }
+    };
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  useEffect(() => {
+    const handleGlobalKeyDown = (e: KeyboardEvent) => {
+      if ((e.metaKey || e.ctrlKey) && e.key === 'k') {
+        e.preventDefault();
+        inputRef.current?.focus();
+        setShowResults(true);
+      }
+    };
+    document.addEventListener('keydown', handleGlobalKeyDown);
+    return () => document.removeEventListener('keydown', handleGlobalKeyDown);
+  }, []);
+
+  useEffect(() => {
+    let cancelled = false;
+
+    storageUtil
+      .get('app/searchHistory', [])
+      .then((history) => {
+        if (cancelled || !history) return;
+        setSearchHistory(history);
+      })
+      .catch((err) => console.error('加载搜索历史失败:', err));
+
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  const searchResults = useMemo(() => {
+    const query = searchQuery.trim().toLowerCase();
+    if (!query) return [];
+    return FEATURES.filter((f) => {
+      if (f.key === 'dashboard') return false;
+      return f.label.toLowerCase().includes(query) || f.description.toLowerCase().includes(query);
+    });
+  }, [searchQuery]);
+
+  const displayedHistory = useMemo(() => {
+    if (searchQuery.trim()) return [];
+    return searchHistory
+      .slice(0, SEARCH_HISTORY_DISPLAY)
+      .map((key) => ({ key, feature: FEATURES.find((f) => f.key === key) }))
+      .filter((item) => item.feature && item.feature.key !== 'dashboard');
+  }, [searchHistory, searchQuery]);
+
+  const saveToHistory = async (featureKey: string) => {
+    if (!featureKey.trim()) return;
+    const nextHistory = [featureKey, ...searchHistory.filter((h) => h !== featureKey)].slice(
+      0,
+      SEARCH_HISTORY_LIMIT,
+    );
+    setSearchHistory(nextHistory);
+    await storageUtil.set('app/searchHistory', nextHistory).catch((err) => console.error(err));
+  };
+
+  const handleSelectFeature = (feature: FeatureConfig) => {
+    navigateTo(feature.key);
+    saveToHistory(feature.key);
+    setSearchQuery('');
+    setShowResults(false);
+  };
+
+  const cycleThemeMode = () => {
+    const nextMap = { light: 'dark', dark: 'system', system: 'light' } as const;
+    setMode(nextMap[mode]);
+  };
+
+  const ThemeIcon = mode === 'light' ? Sun : mode === 'dark' ? Moon : Monitor;
+
+  const themeTitle =
+    mode === 'light' ? '切换到深色模式' : mode === 'dark' ? '切换到系统模式' : '切换到浅色模式';
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    const totalItems = searchQuery.trim() ? searchResults.length : displayedHistory.length;
+
+    if (e.key === 'ArrowDown') {
+      e.preventDefault();
+      setSelectedIndex((prev) => (prev < totalItems - 1 ? prev + 1 : prev));
+    } else if (e.key === 'ArrowUp') {
+      e.preventDefault();
+      setSelectedIndex((prev) => (prev > 0 ? prev - 1 : prev));
+    } else if (e.key === 'Enter') {
+      e.preventDefault();
+      if (selectedIndex >= 0 && selectedIndex < totalItems) {
+        if (searchQuery.trim()) {
+          handleSelectFeature(searchResults[selectedIndex]);
+        } else {
+          const selected = displayedHistory[selectedIndex];
+          if (selected?.feature) {
+            handleSelectFeature(selected.feature);
+          }
+        }
+      } else if (searchQuery.trim() && searchResults.length > 0) {
+        handleSelectFeature(searchResults[0]);
+      }
+    } else if (e.key === 'Escape') {
+      setShowResults(false);
+      inputRef.current?.blur();
+    }
+  };
+
+  const clearSearch = () => {
+    setSearchQuery('');
+    setSelectedIndex(-1);
+  };
+
+  return {
+    searchQuery,
+    showResults,
+    searchResults,
+    displayedHistory,
+    selectedIndex,
+    isDashboard: currentPage === 'dashboard',
+    ThemeIcon,
+    themeTitle,
+    containerRef,
+    inputRef,
+    setSearchQuery,
+    setShowResults,
+    setSelectedIndex,
+    handleSelectFeature,
+    handleKeyDown,
+    cycleThemeMode,
+    handleOpenInTab,
+    goHome,
+    clearSearch,
+  };
+}