feat(test,quota,failover): 模型并发测试、统一配额读取器与故障转移取消支持

- 新增 QuotaReader 抽象层，统一 Codex/Kiro/Antigravity 配额解析逻辑，
  替换 pool/routes.py 中分散的配额构建函数
- 模型测试支持并发执行多候选，前端新增 useModelTest composable 统一
  ModelsTab 和 ModelMappingTab 的测试逻辑
- ModelTestDialog 增加结果概览摘要、超长结果折叠、端点列和新状态支持，
  删除已合并的 TestResultDialog
- FailoverEngine 新增客户端断开检测，支持取消剩余候选并标记记录
- 刷新配额改为分批执行，直连测试候选按可用性排序
- 修复 error 判断从 "error" in dict 改为 dict.get("error") 避免误判

frontend/src/api/endpoints/keys.ts

@@ -202,7 +202,11 @@ export async function refreshProviderQuota(
   keyIds?: string[],
 ): Promise<RefreshQuotaResult> {
   const body = keyIds && keyIds.length > 0 ? { key_ids: keyIds } : undefined
-  const response = await client.post(`/api/admin/endpoints/providers/${providerId}/refresh-quota`, body)
+  const response = await client.post(
+    `/api/admin/endpoints/providers/${providerId}/refresh-quota`,
+    body,
+    { timeout: 5 * 60 * 1000 },
+  )
   return response.data
 }
 

frontend/src/api/endpoints/providers.ts

@@ -148,6 +148,7 @@ export interface TestModelFailoverRequest {
   endpoint_id?: string
   message?: string
   request_id?: string
+  concurrency?: number
 }
 
 export interface TestAttemptDetail {
@@ -159,7 +160,7 @@ export interface TestAttemptDetail {
   key_id: string
   auth_type: string
   effective_model?: string | null
-  status: 'success' | 'failed' | 'skipped'
+  status: 'success' | 'failed' | 'skipped' | 'cancelled' | 'pending' | 'streaming' | 'stream_interrupted' | 'available' | 'unused'
   skip_reason?: string | null
   error_message?: string | null
   status_code?: number | null
@@ -177,9 +178,13 @@ export interface TestModelFailoverResponse {
   error?: string | null
 }
 
-export async function testModelFailover(data: TestModelFailoverRequest): Promise<TestModelFailoverResponse> {
+export async function testModelFailover(
+  data: TestModelFailoverRequest,
+  options: { signal?: AbortSignal } = {}
+): Promise<TestModelFailoverResponse> {
   const response = await client.post('/api/admin/provider-query/test-model-failover', data, {
     timeout: 10 * 60 * 1000,
+    signal: options.signal,
   })
   return response.data
 }