前端权限管理：实现接口级权限管理UI和监控仪表板

新增功能：
- 新增 ApiPermissions.vue 主页面，支持模块级/接口级权限切换
- 新增 ProjectPermissionsModule.vue 组件，展示模块级权限矩阵
- 新增 ApiEndpointPermissions.vue 组件，展示接口级权限矩阵
- 新增 PermissionMonitoring.vue 组件，展示权限系统监控仪表板
- 更新 projectPermissions.ts API 客户端，支持接口级权限和监控API
- 新增权限相关的 TypeScript 类型定义
- 更新路由配置，添加接口级权限管理路由
- 更新国际化文本，添加权限管理相关的中文文本

API 客户端新增函数：
- fetchApiEndpointPermissions: 获取接口级权限矩阵
- updateApiEndpointPermissions: 更新接口级权限矩阵
- fetchPermissionMetrics: 获取权限检查指标
- fetchCacheStats: 获取缓存统计
- fetchPermissionAlerts: 获取告警列表
- fetchPermissionHealth: 获取系统健康状态
- resetPermissionMetrics: 重置指标
- clearPermissionAlerts: 清除告警

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

frontend/src/types/api.ts

@@ -152,3 +152,78 @@ export interface ProjectRolePermissionsResponse {
 export interface ProjectRolePermissionsUpdate {
   roles: ProjectPermissionMatrix;
 }
+
+// 接口级权限
+export interface ApiEndpointPermissionsResponse {
+  [role: string]: {
+    [endpoint_key: string]: {
+      allowed: boolean;
+    };
+  };
+}
+
+export interface ApiEndpointPermissionsUpdate {
+  [role: string]: {
+    [endpoint_key: string]: boolean;
+  };
+}
+
+// 监控指标
+export interface PermissionCheckMetrics {
+  total_checks: number;
+  allowed_checks: number;
+  denied_checks: number;
+  total_time: number;
+  min_time: number;
+  max_time: number;
+  avg_time: number;
+  allow_rate: number;
+  deny_rate: number;
+  error_rate: number;
+  errors: number;
+}
+
+export interface CacheMetrics {
+  total_accesses: number;
+  cache_hits: number;
+  cache_misses: number;
+  cache_invalidations: number;
+  hit_rate: number;
+  miss_rate: number;
+}
+
+export interface PermissionMetricsResponse {
+  check_metrics: PermissionCheckMetrics;
+  cache_metrics: CacheMetrics;
+  uptime_seconds: number;
+}
+
+export interface CacheStatsResponse {
+  cache_items: {
+    project_permissions_count: number;
+    member_role_count: number;
+    total_count: number;
+  };
+  cache_metrics: CacheMetrics;
+}
+
+export interface Alert {
+  timestamp: number;
+  level: "info" | "warning" | "error";
+  type: string;
+  message: string;
+  data: Record<string, any>;
+}
+
+export interface AlertsResponse {
+  total: number;
+  alerts: Alert[];
+}
+
+export interface HealthResponse {
+  status: "healthy" | "degraded" | "unhealthy";
+  health_score: number;
+  issues: string[];
+  metrics: PermissionMetricsResponse;
+  cache_stats: CacheStatsResponse;
+}