feat(工具组件): 扩展工具下拉菜单图标支持

- 新增FileText图标用于文档相关功能
- 新增Languages图标用于翻译相关功能
- 完善iconMap映射表

src/components/features/ToolsDropdown.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import { useState, useRef, useEffect } from 'react';
-import { Wrench, Search, Terminal, Globe, Check } from 'lucide-react';
+import { Wrench, Search, Terminal, Globe, Check, FileText, Languages } from 'lucide-react';
 import { Toggle } from '@/components/ui/Toggle';
 import { Tooltip } from '@/components/ui/Tooltip';
 import { cn } from '@/lib/utils';
@@ -11,6 +11,8 @@ const iconMap: Record<string, React.ComponentType<{ size?: number; className?: s
   Search,
   Terminal,
   Globe,
+  FileText,
+  Languages,
 };
 
 interface ToolsDropdownProps {