fix: 修复 Tauri 构建时的 TypeScript 编译错误

- 移除 SimilaritySearchResults.tsx 中未使用的 Clock 导入
- 移除 SimilaritySearchTool.tsx 中未使用的导入：Sparkles, Download, CustomSelect
- 移除未使用的变量：setThreshold, quickSearch
- 移除未使用的函数：handleQuickTagClick
- 修复所有 TypeScript 编译错误，确保 pnpm run tauri:build 成功执行

apps/desktop/src/components/similarity/SimilaritySearchResults.tsx

@@ -2,7 +2,6 @@ import React, { useCallback } from 'react';
 import { createPortal } from 'react-dom';
 import {
   Grid,
-  Clock,
   TrendingUp,
   ExternalLink,
   ChevronRight,

apps/desktop/src/pages/tools/SimilaritySearchTool.tsx

@@ -1,7 +1,6 @@
 import React, { useEffect, useCallback, useState } from 'react';
 import {
   Search,
-  Sparkles,
   RotateCcw,
   TrendingUp,
   Zap,
@@ -9,8 +8,7 @@ import {
   Loader2,
   X,
   ExternalLink,
-  Copy,
+  Copy
-  Download
 } from 'lucide-react';
 import { useNavigate } from 'react-router-dom';
 import {
@@ -21,7 +19,6 @@ import {
 import { SimilaritySearchPanel } from '../../components/similarity/SimilaritySearchPanel';
 import SimilaritySearchResults from '../../components/similarity/SimilaritySearchResults';
 import { SimilaritySearchRequest } from '../../types/similaritySearch';
-import { CustomSelect } from '../../components/CustomSelect';
 
 /**
  * 相似度检索工具页面
@@ -39,7 +36,6 @@ const SimilaritySearchTool: React.FC = () => {
     query,
     selectedThreshold,
     setQuery,
-    setThreshold,
     executeSearch,
     searchWithPagination,
     changePageSize,
@@ -50,7 +46,7 @@ const SimilaritySearchTool: React.FC = () => {
 
   // 选择器
   const { useSearchState, useConfigState, useSuggestionsState } = useSimilaritySearchSelectors();
-  const { quickSearch, resetAll, selectSuggestionAndSearch } = useSimilaritySearchActions();
+  const { resetAll, selectSuggestionAndSearch } = useSimilaritySearchActions();
 
   // 获取状态
   const searchState = useSearchState();
@@ -91,10 +87,7 @@ const SimilaritySearchTool: React.FC = () => {
     selectSuggestionAndSearch(suggestion);
   }, [selectSuggestionAndSearch]);
 
-  // 处理快速搜索标签点击
+
-  const handleQuickTagClick = useCallback((tag: string) => {
-    quickSearch(tag);
-  }, [quickSearch]);
 
   // 处理重置
   const handleReset = useCallback(() => {