Merge branch 'pr-503'

# Conflicts:
#	apps/aether-gateway/src/handlers/admin/provider/summary/value.rs
#	apps/aether-gateway/src/lib.rs
#	apps/aether-gateway/src/maintenance/mod.rs
#	apps/aether-gateway/src/maintenance/runtime/workers.rs
#	frontend/src/api/endpoints/types/provider.ts

frontend/src/api/admin.ts

@@ -918,6 +918,19 @@ export const adminApi = {
     return response.data
   },
 
+  async testImportantNotification(channel: 'all' | 'email' | 'server_chan' = 'all'): Promise<{
+    success: boolean
+    message: string
+    channels: Array<{ channel: string; success: boolean; message: string }>
+  }> {
+    const response = await apiClient.post<{
+      success: boolean
+      message: string
+      channels: Array<{ channel: string; success: boolean; message: string }>
+    }>('/api/admin/system/important-notification/test', { channel })
+    return response.data
+  },
+
   // 邮件模板相关
   // 获取所有邮件模板
   async getEmailTemplates(): Promise<EmailTemplatesResponse> {

frontend/src/api/endpoints/types/provider.ts

@@ -712,6 +712,7 @@ export interface ProviderWithEndpointsSummary {
   ops_configured: boolean  // 是否配置了扩展操作（余额监控等）
   ops_architecture_id?: string  // 扩展操作使用的架构 ID（如 cubence, anyrouter）
   kiro_simulated_cache_enabled?: boolean
+  ops_quota_alert_enabled?: boolean
   created_at: string
   updated_at: string
 }

frontend/src/api/providerOps.ts

@@ -127,12 +127,19 @@ export interface ActionConfigRequest {
 }
 
 /** 保存配置请求 */
+export interface QuotaAlertConfig {
+  enabled: boolean
+  threshold_amount: number
+  fetch_interval_seconds: number
+}
+
 export interface SaveConfigRequest {
   architecture_id: string
   base_url?: string
   connector: ConnectorConfigRequest
   actions: Record<string, ActionConfigRequest>
   schedule: Record<string, string>
+  quota_alert?: QuotaAlertConfig
 }
 
 /** 连接请求 */
@@ -190,6 +197,7 @@ export interface ProviderOpsConfigResponse {
     config: Record<string, unknown>
     credentials: Record<string, unknown>
   }
+  quota_alert?: QuotaAlertConfig
 }
 
 /**