fix(api): harden response contracts

apps/web_v1/src/pages/login.tsx

@@ -6,6 +6,7 @@ import {
   IconLaunch,
   IconLoading,
 } from '@arco-design/web-react/icon'
+import { normalizeBaseUrl } from '../api/client'
 
 const { Title, Text } = Typography
 
@@ -114,8 +115,3 @@ async function checkServerStatus(
     setStatus('offline')
   }
 }
-
-function normalizeBaseUrl(value: string) {
-  const trimmed = value.trim()
-  return trimmed.endsWith('/') ? trimmed.slice(0, -1) : trimmed
-}