refactor: 统一中文文案并简化组件结构，提升代码可读性

移除 chrome.i18n 后，将各功能页面、布局与工具模块的 UI 文案改为内联中文；
删除冗余注释与过度抽象（如 ToolCard、StatCard），精简 props 与状态管理；
同步优化 JsonTools、StorageCleaner、Timestamp、TestDataGenerator、Dashboard、
Base64Converter、RightClickRestorer、TextStatistics、TopBar、RouterProvider、
ThemeModeProvider 及生成器库与 utils 工具文件。

src/pages/Dashboard/__tests__/index.test.tsx

@@ -1,8 +1,7 @@
 import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { describe, it, expect, vi, beforeEach } from 'vitest';
-import { getFeatureByKey } from '@/config/features';
-import type { DashboardFeatureItem } from '../useDashboard';
+import { resolveDashboardFeatures, type DashboardFeatureItem } from '../dashboardFeatures';
 import Index from '../index';
 
 const mockNavigateTo = vi.fn();
@@ -13,11 +12,7 @@ vi.mock('../useDashboard', () => ({
 }));
 
 function buildFeatureItem(key: 'timestamp' | 'jwt'): DashboardFeatureItem {
-  const feature = getFeatureByKey(key)!;
-  return {
-    key,
-    feature: feature as DashboardFeatureItem['feature'],
-  };
+  return resolveDashboardFeatures([key], [key])[0]!;
 }
 
 describe('Dashboard 页面', () => {

src/pages/Dashboard/dashboardFeatures.ts

@@ -14,10 +14,6 @@ function isDashboardFeature(feature: FeatureConfig): feature is DashboardFeature
   return feature.icon != null;
 }
 
-/**
- * 将页面 key 列表解析为 Dashboard 可展示的工具项。
- * 过滤条件：在 visiblePages 中且 feature 配置了 icon。
- */
 export function resolveDashboardFeatures(
   keys: PageType[],
   visiblePages: PageType[],

src/pages/Dashboard/index.tsx

@@ -9,7 +9,7 @@ export default function Index() {
       {showRecent && (
         <div className="flex flex-col gap-2">
           <h3 className="text-xs font-semibold text-muted-foreground/80 uppercase tracking-wider">
-            {'最近使用'}
+            最近使用
           </h3>
           <div className="flex flex-wrap gap-2">
             {recentFeatures.map(({ key, feature }) => {
@@ -37,10 +37,10 @@ export default function Index() {
 
       <div className="flex flex-col gap-2">
         <h3 className="text-xs font-semibold text-muted-foreground/80 uppercase tracking-wider">
-          {'全部工具'}
+          全部工具
         </h3>
         {visibleFeatures.length === 0 ? (
-          <p className="text-sm text-muted-foreground py-4 text-center">{'没有可用的工具'}</p>
+          <p className="text-sm text-muted-foreground py-4 text-center">没有可用的工具</p>
         ) : (
           <div
             className={cn('grid grid-cols-3 sm:grid-cols-4 md:grid-cols-5 lg:grid-cols-6 gap-2')}

src/pages/Dashboard/useDashboard.ts

@@ -3,8 +3,6 @@ import { useRouter } from '@/providers/RouterProvider';
 import type { PageType } from '@/types/storage';
 import { resolveDashboardFeatures, type DashboardFeatureItem } from './dashboardFeatures';
 
-export type { DashboardFeatureItem } from './dashboardFeatures';
-
 export interface UseDashboardReturn {
   visibleFeatures: DashboardFeatureItem[];
   recentFeatures: DashboardFeatureItem[];