fix: AlertCenter崩溃修复——字段名映射+notify_channels安全解析

- AlertRule接口与后端对齐(id:number/notify_channels:string)
- 告警事件数据映射(rule_name→title, message→description, target→source)
- notify_channels安全解析(JSON.parse+try-catch替代直接.map)
- labels/annotations字符串转对象安全处理
- Header tab栏移除(侧边栏导航足够)
- SQL审计API改为真实后端调用

frontend/src/components/monitor/alert-center/AlertCenter.tsx

@@ -46,18 +46,23 @@ export interface Alert {
   annotations: Record<string, string>;
 }
 
+// Logan.Li — 字段名与后端 alert.go AlertRule 对齐
 interface AlertRule {
-  id: string;
+  id: number;
   name: string;
   description: string;
   enabled: boolean;
-  severity: 'critical' | 'warning' | 'info';
-  query: string;
-  duration: string;
-  threshold: number;
-  labels: string[];
-  notificationChannels: string[];
-  lastEvaluated: string;
+  severity: string;
+  type?: string;
+  source?: string;
+  expression?: string;
+  duration?: number;
+  threshold?: number;
+  labels?: string;
+  annotations?: string;
+  notify_channels?: string;
+  created_at?: string;
+  updated_at?: string;
 }
 
 interface NotificationChannel {
@@ -103,7 +108,24 @@ const AlertCenter: React.FC = () => {
     setLoading(true);
     try {
       const res = await alertCenterApi.getAlerts();
-      const data = res.list || [];
+      const raw = (res.list || []) as any[];
+      // Logan.Li — 后端字段映射到前端 Alert 接口
+      const data: Alert[] = raw.map(a => ({
+        id: String(a.id),
+        title: a.rule_name || a.title || `告警 #${a.id}`,
+        description: a.message || a.description || '',
+        severity: a.severity || 'info',
+        status: a.status || 'firing',
+        source: a.target || a.source || '',
+        service: a.service || '',
+        metric: a.metric || '',
+        value: a.value || 0,
+        threshold: a.threshold || 0,
+        startedAt: a.started_at || a.startedAt || a.created_at || new Date().toISOString(),
+        resolvedAt: a.resolved_at || a.resolvedAt,
+        labels: typeof a.labels === 'string' ? (() => { try { return JSON.parse(a.labels || '{}'); } catch { return {}; } })() : (a.labels || {}),
+        annotations: typeof a.annotations === 'string' ? (() => { try { return JSON.parse(a.annotations || '{}'); } catch { return {}; } })() : (a.annotations || {}),
+      }));
       setAlerts(data);
       setStats({
         firing: data.filter((a: Alert) => a.status === 'firing').length,
@@ -171,7 +193,7 @@ const AlertCenter: React.FC = () => {
   const toggleRule = async (ruleId: string, enabled: boolean) => {
     try {
       await alertCenterApi.toggleRule(ruleId);
-      setRules(rules.map(r => r.id === ruleId ? { ...r, enabled } : r));
+      setRules(rules.map(r => String(r.id) === ruleId ? { ...r, enabled } : r));
       toast.success('规则状态已更新');
     } catch (error) {
       toast.error('更新失败');
@@ -531,20 +553,31 @@ const AlertCenter: React.FC = () => {
                       </div>
                       <p className="text-sm text-muted-foreground mb-2">{rule.description}</p>
                       <div className="flex items-center gap-4 text-xs text-muted-foreground">
-                        <span className="font-mono bg-muted px-2 py-1 rounded">{rule.query}</span>
-                        <span>持续 {rule.duration}</span>
-                        <span>阈值: {rule.threshold}</span>
-                      </div>
-                      <div className="flex gap-1 mt-2">
-                        {rule.notificationChannels.map(ch => (
-                          <Badge key={ch} variant="outline" className="text-xs">{ch}</Badge>
-                        ))}
+                        {rule.expression && (
+                          <span className="font-mono bg-muted px-2 py-1 rounded">{rule.expression}</span>
+                        )}
+                        {rule.duration ? <span>持续 {rule.duration}秒</span> : null}
                       </div>
+                      {(() => {
+                        let channels: string[] = [];
+                        try {
+                          const raw = rule.notify_channels;
+                          if (raw) channels = Array.isArray(raw) ? raw : JSON.parse(raw);
+                        } catch { /* ignore */ }
+                        if (!channels.length) return null;
+                        return (
+                          <div className="flex gap-1 mt-2">
+                            {channels.map(ch => (
+                              <Badge key={ch} variant="outline" className="text-xs">{ch}</Badge>
+                            ))}
+                          </div>
+                        );
+                      })()}
                     </div>
                     <div className="flex items-center gap-2">
                       <Switch
                         checked={rule.enabled}
-                        onCheckedChange={(checked) => toggleRule(rule.id, checked)}
+                        onCheckedChange={(checked) => toggleRule(String(rule.id), checked)}
                       />
                       <Button variant="ghost" size="sm">
                         <Settings className="w-4 h-4" />