修复代理路由详情认证配置 Tab：移除 PoW 配置（PoW 仅在 WAF 规则组中设置）；保留 Basic Auth 保存能力；移除页头重复的「保存当前分区」按钮。

frontend/app/(main)/proxy-routes/components/helpers.ts

@@ -312,8 +312,6 @@ export function buildPayloadFromRoute(
     cache_rules: route.cache_rule_list,
     custom_headers: route.custom_header_list,
     remark: route.remark || '',
-    pow_enabled: route.pow_enabled,
-    pow_config: JSON.stringify(route.pow_config),
     basic_auth_enabled: route.basic_auth_enabled,
     basic_auth_username: route.basic_auth_username,
     basic_auth_password: route.basic_auth_password,

frontend/app/(main)/proxy-routes/components/proxy-route-create-sheet.tsx

@@ -114,8 +114,6 @@ export function ProxyRouteCreateSheet({
         cache_policy: 'url',
         cache_rules: [],
         custom_headers: [],
-        pow_enabled: false,
-        pow_config: '{}',
         basic_auth_enabled: false,
         remark: values.remark.trim(),
         upstream_type: 'direct',