refactor(frontend): P1-P2 架构统一 — utils/hooks/api 模块化

P1:
- utils/storage.ts、theme.ts、validate.ts + index 统一出口
- request/store/useTheme 接入 storage；清零 confirm/alert
- PipelineManager、TerminalAuditTab 拆分子模块（<700行红线）

P2:
- api/monitor、api/deploy 子目录化
- hooks/api 扩展：servers/pipelines/alerts/audit/sessionCommands
- PipelineManager、AuditOperationsTab 接入 TanStack Query

frontend/src/components/layout/ErrorBoundary.tsx

@@ -1,6 +1,7 @@
 import { Component, type ErrorInfo, type ReactNode } from 'react';
 import { Button } from '@/components/ui/button';
 import { AlertTriangle, RotateCcw, Home, Bug } from 'lucide-react';
+import { toast } from 'sonner';
 
 interface Props {
   children: ReactNode;
@@ -47,7 +48,9 @@ export class ErrorBoundary extends Component<Props, State> {
     const { error, errorInfo } = this.state;
     const body = `## 错误报告\n\n**时间:** ${new Date().toISOString()}\n**URL:** ${window.location.href}\n**用户代理:** ${navigator.userAgent}\n\n### 错误信息\n\n\`\`\`\n${error?.name}: ${error?.message}\n\`\`\`\n\n### 组件堆栈\n\n\`\`\`\n${errorInfo?.componentStack}\n\`\`\`\n`;
     navigator.clipboard.writeText(body).then(() => {
-      alert('错误信息已复制到剪贴板，请粘贴到 Issue 中');
+      toast.success('错误信息已复制到剪贴板，请粘贴到 Issue 中');
+    }).catch(() => {
+      toast.error('复制失败，请手动复制错误信息');
     });
   };