fix(frontend): 支持请求级自定义超时并将接单模板初始化与批量回填超时延长至5分钟

- 在 http 客户端封装中增加可选 RequestOptions 参数透传，允许对耗时较长的数据初始化/大批量回填接口单独配置超时
- 将 applyAdminTemplateProductBootstrap、syncAdminAffiliateDashCostSnapshots、backfillAdminProductMappings 及 backfillAdminNormalizedQuantities 客户端超时由 50 秒延长至 300 秒（5分钟）
- 彻底解决生产全量订单数据规模下接单模板初始化触发 50 秒网络超时提示的问题
- 验证方式：npm --prefix apps/frontend run typecheck 通过，生产镜像构建运行正常

apps/frontend/src/services/admin/cost-center.ts

@@ -51,6 +51,7 @@ export function applyAdminTemplateProductBootstrap() {
   return apiPost<TemplateProductBootstrapResult>(
     '/api/v1/admin/cost-center/template-bootstrap/apply',
     { repair: true },
+    { timeout: 300_000 },
   )
 }
 
@@ -160,7 +161,7 @@ export function syncAdminAffiliateDashCostSnapshots() {
       insertedCount: number
       batchCount: number
     }
-  }>('/api/v1/admin/cost-center/affiliate-products/sync-snapshots')
+  }>('/api/v1/admin/cost-center/affiliate-products/sync-snapshots', {}, { timeout: 300_000 })
 }
 
 
@@ -233,7 +234,7 @@ export function backfillAdminProductMappings(payload: Record<string, unknown>) {
     limit: number
     batches: number
     remainingCount: number
-  }>('/api/v1/admin/cost-center/mappings/backfill', payload)
+  }>('/api/v1/admin/cost-center/mappings/backfill', payload, { timeout: 300_000 })
 }
 
 export function backfillAdminNormalizedQuantities(payload: Record<string, unknown>) {
@@ -242,7 +243,7 @@ export function backfillAdminNormalizedQuantities(payload: Record<string, unknow
     limit: number
     batches: number
     remainingCount: number
-  }>('/api/v1/admin/cost-center/normalized-quantities/backfill', payload)
+  }>('/api/v1/admin/cost-center/normalized-quantities/backfill', payload, { timeout: 300_000 })
 }
 
 export function fetchAdminCostItems(params?: Record<string, unknown>) {