merge: 合并主分支改动并保留 ops 监控实现

合并 main 分支的最新改动到 ops 监控分支。
冲突解决策略：保留当前分支的 ops 相关改动，接受主分支的其他改动。

保留的 ops 改动：
- 运维监控配置和依赖注入
- 运维监控 API 处理器和中间件
- 运维监控服务层和数据访问层
- 运维监控前端界面和状态管理

接受的主分支改动：
- Linux DO OAuth 集成
- 账号过期功能
- IP 地址限制功能
- 用量统计优化
- 其他 bug 修复和功能改进

frontend/src/api/admin/groups.ts

@@ -16,7 +16,7 @@ import type {
  * List all groups with pagination
  * @param page - Page number (default: 1)
  * @param pageSize - Items per page (default: 20)
- * @param filters - Optional filters (platform, status, is_exclusive)
+ * @param filters - Optional filters (platform, status, is_exclusive, search)
  * @returns Paginated list of groups
  */
 export async function list(
@@ -26,6 +26,7 @@ export async function list(
     platform?: GroupPlatform
     status?: 'active' | 'inactive'
     is_exclusive?: boolean
+    search?: string
   },
   options?: {
     signal?: AbortSignal

frontend/src/api/admin/usage.ts

@@ -54,15 +54,20 @@ export async function list(
 
 /**
  * Get usage statistics with optional filters (admin only)
- * @param params - Query parameters (user_id, api_key_id, period/date range)
+ * @param params - Query parameters for filtering
  * @returns Usage statistics
  */
 export async function getStats(params: {
   user_id?: number
   api_key_id?: number
+  account_id?: number
+  group_id?: number
+  model?: string
+  stream?: boolean
   period?: string
   start_date?: string
   end_date?: string
+  timezone?: string
 }): Promise<AdminUsageStatsResponse> {
   const { data } = await apiClient.get<AdminUsageStatsResponse>('/admin/usage/stats', {
     params

frontend/src/api/keys.ts

@@ -42,12 +42,16 @@ export async function getById(id: number): Promise<ApiKey> {
  * @param name - Key name
  * @param groupId - Optional group ID
  * @param customKey - Optional custom key value
+ * @param ipWhitelist - Optional IP whitelist
+ * @param ipBlacklist - Optional IP blacklist
  * @returns Created API key
  */
 export async function create(
   name: string,
   groupId?: number | null,
-  customKey?: string
+  customKey?: string,
+  ipWhitelist?: string[],
+  ipBlacklist?: string[]
 ): Promise<ApiKey> {
   const payload: CreateApiKeyRequest = { name }
   if (groupId !== undefined) {
@@ -56,6 +60,12 @@ export async function create(
   if (customKey) {
     payload.custom_key = customKey
   }
+  if (ipWhitelist && ipWhitelist.length > 0) {
+    payload.ip_whitelist = ipWhitelist
+  }
+  if (ipBlacklist && ipBlacklist.length > 0) {
+    payload.ip_blacklist = ipBlacklist
+  }
 
   const { data } = await apiClient.post<ApiKey>('/keys', payload)
   return data