fix: correct login entry routing and errors

src/api/adminApi.ts

@@ -6,6 +6,23 @@ type RequestOptions = RequestInit & {
 
 export const DEFAULT_CLIENT_TENANT_ID = 'tenant-a';
 
+async function readErrorMessage(response: Response) {
+  const fallback = `请求失败（${response.status}）`;
+  const text = await response.text();
+  if (!text) return fallback;
+
+  try {
+    const parsed = JSON.parse(text) as { message?: string | string[]; error?: string };
+    if (Array.isArray(parsed.message)) return parsed.message.join('；');
+    if (parsed.message) return parsed.message;
+    if (parsed.error) return parsed.error;
+  } catch {
+    return text;
+  }
+
+  return text;
+}
+
 async function request<T>(path: string, options: RequestOptions = {}): Promise<T> {
   const headers = new Headers(options.headers);
   headers.set('Content-Type', 'application/json');
@@ -19,7 +36,7 @@ async function request<T>(path: string, options: RequestOptions = {}): Promise<T
   }
   const response = await fetch(`/api${path}`, { ...options, headers });
   if (!response.ok) {
-    throw new Error(await response.text());
+    throw new Error(await readErrorMessage(response));
   }
   return response.json() as Promise<T>;
 }
@@ -36,7 +53,7 @@ async function requestBlob(path: string, options: RequestOptions = {}): Promise<
   }
   const response = await fetch(`/api${path}`, { ...options, headers });
   if (!response.ok) {
-    throw new Error(await response.text());
+    throw new Error(await readErrorMessage(response));
   }
   return response.blob();
 }