fix: merge后14个测试修复+前端TS编译修复 - 895/895通过+前端零错误

frontend/src/pages/Dashboard.tsx

@@ -2,9 +2,9 @@ import { useEffect, useRef, useState, useCallback, useMemo } from 'react';
 import {
   ClipboardList, Clock, CheckCircle, AlertTriangle,
   Database, ChevronRight, X, AlertCircle, Info, Bell,
-  Activity, TrendingUp, Zap, Server, Plus, Search,
+  Activity, TrendingUp, Zap, Server, Search,
   FileText, ArrowUpRight, ArrowDownRight, Minus,
-  Filter, Eye, Loader2, BarChart3,
+  Filter, Eye, BarChart3,
 } from 'lucide-react';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { dbInstances, statusMap, statusColorMap, dbTypeColorMap, tickets, announcements } from '@/lib/mock';