fix localized login network error

frontend/platform_admin/src/api/http.ts

@@ -7,14 +7,19 @@ export type PageResult<T> = { total: number; list: T[] };
 
 export async function request<T>(path: string, init?: RequestInit): Promise<T> {
   const token = localStorage.getItem(tokenStorageKey);
-  const response = await fetch(`${apiBaseURL}${path}`, {
-    ...init,
-    headers: {
-      'Content-Type': 'application/json',
-      ...(token ? { Authorization: token } : {}),
-      ...(init?.headers ?? {}),
-    },
-  });
+  let response: Response;
+  try {
+    response = await fetch(`${apiBaseURL}${path}`, {
+      ...init,
+      headers: {
+        'Content-Type': 'application/json',
+        ...(token ? { Authorization: token } : {}),
+        ...(init?.headers ?? {}),
+      },
+    });
+  } catch {
+    throw new Error('无法连接服务器，请确认服务已启动');
+  }
   const payload = (await response.json()) as { code?: number; message?: string; details?: T };
   if (!response.ok || payload.code !== 0) throw new Error(payload.message || '请求失败');
   return payload.details as T;