feat(audit): F1+F2 告警静默规则标记完成 + 审计日志CSV导出实现

F1 告警静默规则 [done]:
- 后端 alert_silence.go: CRUD + Toggle (onetime/daily/weekly 三模式)
- 告警引擎 isSilenced 集成 (alert_engine.go)
- 前端 SilenceRuleTab + SilenceDialog
- 路由 /alerts/silences 已注册

F2 审计日志导出 [done]:
- 重写 ExportAuditLogs: 真正的 CSV 导出 (encoding/csv + UTF-8 BOM)
- 支持 module/action/username/startTime/endTime 筛选
- 导出限制 10000 条防溢出，自动记录审计日志
- JSON 格式向后兼容 (format=json)
- 前端 exportLogs 传递查询参数

同时包含累积的前期工作:
- 目录重构 internal/ -> controller/model/router (v0.55-v0.57)
- 后端分层架构 dto/repository/service/utils
- 审计模块全功能 (终端审计/操作审计/登录日志)
- asciicast v2 录制格式
- SFTP 文件浏览器
- StatStrip 紧凑统计条
- 在线会话自动刷新
- LiveMonitor WebSocket 诊断修复

验证: go build ✅ | npm run build ✅ | Docker 部署 ✅ | 10 回归端点 ✅ | CSV 导出 ✅ | 静默 CRUD ✅

frontend/src/services/api/system.ts

@@ -2,11 +2,13 @@
 // 从 services/api.ts 拆分 — Q3 api.ts 模块化
 
 import { http, type ListResponse } from '../http';
-import { isOnline, timeAgo, asList } from '../../components/agent/agentUtils';
 
 export const auditApi = {
-  getLogs: async (params?: { page?: number; page_size?: number; module?: string; action?: string }) => {
-    return http.get<ListResponse>('/audit/logs', params);
+  getLogs: async (params?: { page?: number; page_size?: number; module?: string; action?: string; username?: string; start_time?: string; end_time?: string }) => {
+    return http.get<ListResponse>('/audit/logs', params as Record<string, string | number | boolean | undefined>);
+  },
+  getLogDetail: async (id: number | string) => {
+    return http.get(`/audit/logs/${id}`);
   },
   getModules: async () => {
     return http.get('/audit/modules');
@@ -17,6 +19,17 @@ export const auditApi = {
   getStatistics: async () => {
     return http.get('/audit/statistics');
   },
+  exportLogs: async (params?: Record<string, string | number | boolean | undefined>) => {
+    // Build URL with query params for server-side CSV export
+    const qs = new URLSearchParams();
+    qs.set('format', 'csv');
+    if (params) {
+      Object.entries(params).forEach(([k, v]) => {
+        if (v !== undefined && v !== null && v !== '') qs.set(k, String(v));
+      });
+    }
+    return http.download(`/audit/logs/export?${qs.toString()}`);
+  },
   clearLogs: async () => {
     return http.post('/audit/logs/clear');
   },
@@ -24,9 +37,51 @@ export const auditApi = {
 
 // ==================== 终端会话审计 API（WebSSH 录制） ==================== // Logan.Li
 
+export const terminalSessionApi = {
+  list: async (params?: { page?: number; page_size?: number; server_id?: number; username?: string; status?: string }) => {
+    return http.get<ListResponse>('/terminal-sessions', params as Record<string, string | number | boolean | undefined>);
+  },
+  get: async (id: number) => {
+    return http.get(`/terminal-sessions/${id}`);
+  },
+  getRecord: async (id: number) => {
+    return http.get<string>(`/terminal-sessions/${id}/record`);
+  },
+  kill: async (id: number) => {
+    return http.post(`/terminal-sessions/${id}/kill`);
+  },
+  download: async (id: number) => {
+    return http.download(`/terminal-sessions/${id}/download`, `session-${id}.cast`);
+  },
+  delete: async (id: number) => {
+    return http.delete(`/terminal-sessions/${id}`);
+  },
+  batchDelete: async (ids: number[]) => {
+    return http.post('/terminal-sessions/batch-delete', { ids });
+  },
+};
+
+// ==================== 会话命令审计 API ====================
+
+export const sessionCommandApi = {
+  list: async (params?: { page?: number; page_size?: number; session_id?: number; username?: string }) => {
+    return http.get<ListResponse>('/session-commands', params as Record<string, string | number | boolean | undefined>);
+  },
+};
+
+// ==================== 登录日志 API ====================
+
+export const loginLogApi = {
+  list: async (params?: { page?: number; page_size?: number; username?: string; status?: string }) => {
+    return http.get<ListResponse>('/login-logs', params as Record<string, string | number | boolean | undefined>);
+  },
+};
+
+// ==================== 审批流程 API ====================
+
 export const approvalApi = {
-  getTemplates: async () => {
-    return http.get('/approvals/templates');
+  getTemplates: async (params?: { type?: string; category?: string }) => {
+    return http.get('/approvals/templates', params);
   },
   getTemplate: async (id: number | string) => {
     return http.get(`/approvals/templates/${id}`);
@@ -40,7 +95,7 @@ export const approvalApi = {
   deleteTemplate: async (id: number | string) => {
     return http.delete(`/approvals/templates/${id}`);
   },
-  getProcesses: async (params?: { page?: number; page_size?: number; status?: string }) => {
+  getProcesses: async (params?: { page?: number; page_size?: number; status?: string; category?: string }) => {
     return http.get('/approvals/processes', params);
   },
   createProcess: async ( data: any) => {