feat(pool): 增加 OAuth 账号池管理功能

- 新增 pool manager / strategy / health_policy / cost_tracker / redis_ops 等核心模块
- 新增 pool admin API 路由与 schemas
- 新增 OAuth 账号类型解析 (oauth_plan)
- 前端增加 PoolManagement 页面、PoolConfigDialog、PoolImportDialog、PoolStatusCard 组件
- 补充 pool config / cost tracker / health policy / manager / strategy / trace 等测试

frontend/src/api/endpoints/pool.ts

@@ -0,0 +1,149 @@
+import client from '../client'
+
+export interface PoolKeyStatus {
+  key_id: string
+  key_name: string
+  is_active: boolean
+  cooldown_reason: string | null
+  cooldown_ttl_seconds: number | null
+  cost_window_usage: number
+  cost_limit: number | null
+  sticky_sessions: number
+  lru_score: number | null
+}
+
+export interface PoolStatusResponse {
+  provider_id: string
+  provider_name: string
+  pool_enabled: boolean
+  total_keys: number
+  total_sticky_sessions: number
+  keys: PoolKeyStatus[]
+}
+
+/**
+ * 获取 Provider 的号池状态
+ */
+export async function getPoolStatus(providerId: string): Promise<PoolStatusResponse> {
+  const response = await client.get(`/api/admin/providers/${providerId}/pool-status`)
+  return response.data
+}
+
+/**
+ * 清除指定 Key 的号池冷却状态
+ */
+export async function clearPoolCooldown(
+  providerId: string,
+  keyId: string,
+): Promise<{ message: string }> {
+  const response = await client.post(
+    `/api/admin/providers/${providerId}/pool/clear-cooldown/${keyId}`,
+  )
+  return response.data
+}
+
+/**
+ * 重置指定 Key 的号池成本窗口
+ */
+export async function resetPoolCost(
+  providerId: string,
+  keyId: string,
+): Promise<{ message: string }> {
+  const response = await client.post(
+    `/api/admin/providers/${providerId}/pool/reset-cost/${keyId}`,
+  )
+  return response.data
+}
+
+// ---------------------------------------------------------------------------
+// Pool management API (standalone page)
+// ---------------------------------------------------------------------------
+
+export interface PoolOverviewItem {
+  provider_id: string
+  provider_name: string
+  provider_type: string
+  total_keys: number
+  active_keys: number
+  cooldown_count: number
+  pool_enabled: boolean
+}
+
+export interface PoolOverviewResponse {
+  items: PoolOverviewItem[]
+}
+
+export interface PoolKeyDetail {
+  key_id: string
+  key_name: string
+  is_active: boolean
+  auth_type: string
+  cooldown_reason: string | null
+  cooldown_ttl_seconds: number | null
+  cost_window_usage: number
+  cost_limit: number | null
+  sticky_sessions: number
+  lru_score: number | null
+  created_at: string | null
+  last_used_at: string | null
+}
+
+export interface PoolKeysPageResponse {
+  total: number
+  page: number
+  page_size: number
+  keys: PoolKeyDetail[]
+}
+
+export interface PoolKeysQuery {
+  page?: number
+  page_size?: number
+  search?: string
+  status?: 'all' | 'active' | 'cooldown' | 'inactive'
+}
+
+export interface PoolKeyImportItem {
+  name: string
+  api_key: string
+  auth_type?: string
+}
+
+export interface BatchImportResponse {
+  imported: number
+  skipped: number
+  errors: { index: number; reason: string }[]
+}
+
+export interface PoolBatchAction {
+  key_ids: string[]
+  action: 'enable' | 'disable' | 'delete' | 'clear_cooldown' | 'reset_cost'
+}
+
+export async function getPoolOverview(): Promise<PoolOverviewResponse> {
+  const response = await client.get('/api/admin/pool/overview')
+  return response.data
+}
+
+export async function listPoolKeys(
+  providerId: string,
+  params: PoolKeysQuery = {},
+): Promise<PoolKeysPageResponse> {
+  const response = await client.get(`/api/admin/pool/${providerId}/keys`, { params })
+  return response.data
+}
+
+export async function batchImportPoolKeys(
+  providerId: string,
+  keys: PoolKeyImportItem[],
+): Promise<BatchImportResponse> {
+  const response = await client.post(`/api/admin/pool/${providerId}/keys/batch-import`, { keys })
+  return response.data
+}
+
+export async function batchActionPoolKeys(
+  providerId: string,
+  body: PoolBatchAction,
+): Promise<{ affected: number; message: string }> {
+  const response = await client.post(`/api/admin/pool/${providerId}/keys/batch-action`, body)
+  return response.data
+}