fix(mobile): harden stored auth credentials and login response validation

- Treat 'undefined'/'null' localStorage values as absent; clear incomplete
  token/clientId pairs and prompt re-login instead of sending broken headers
- Gate authenticated UI on both token and clientId via isAuthenticated
- Reject login responses missing access_token or client_id

mobile/src/App.vue

@@ -1,6 +1,6 @@
 <template>
   <main class="mobile-aihr">
-    <section v-if="!authToken" class="page auth-page">
+    <section v-if="!isAuthenticated" class="page auth-page">
       <header class="top auth-top">
         <div class="top-row">
           <h1>AI人力助手</h1>
@@ -1604,6 +1604,17 @@ const tokenKey = 'aihr_mobile_access_token';
 const clientIdKey = 'aihr_mobile_client_id';
 const phoneKey = 'aihr_mobile_phone';
 const phonePattern = /^1[3-9]\d{9}$/;
+const readStoredCredential = (key: string) => {
+  const value = localStorage.getItem(key)?.trim() || '';
+  return value === 'undefined' || value === 'null' ? '' : value;
+};
+const initialAuthToken = readStoredCredential(tokenKey);
+const initialClientId = readStoredCredential(clientIdKey);
+const hasIncompleteStoredAuth = Boolean(initialAuthToken || initialClientId) && !(initialAuthToken && initialClientId);
+if (hasIncompleteStoredAuth) {
+  localStorage.removeItem(tokenKey);
+  localStorage.removeItem(clientIdKey);
+}
 const practiceScenarios: PracticeScenario[] = [
   {
     id: 'complaint-water',
@@ -1668,9 +1679,10 @@ const tapped = ref('');
 const toastMessage = ref('');
 const phone = ref(localStorage.getItem(phoneKey) || '');
 const smsCode = ref('');
-const authToken = ref(localStorage.getItem(tokenKey) || '');
-const clientId = ref(localStorage.getItem(clientIdKey) || '');
-const authMessage = ref('');
+const authToken = ref(hasIncompleteStoredAuth ? '' : initialAuthToken);
+const clientId = ref(hasIncompleteStoredAuth ? '' : initialClientId);
+const authMessage = ref(hasIncompleteStoredAuth ? '登录已过期，请重新登录' : '');
+const isAuthenticated = computed(() => Boolean(authToken.value && clientId.value));
 const sendingCode = ref(false);
 const loggingIn = ref(false);
 const practiceStatus = ref<PracticeStatus>('idle');
@@ -3364,10 +3376,15 @@ const loginBySms = async () => {
         body: JSON.stringify({ phonenumber: phone.value, smsCode: smsCode.value, tenantId: '000000' })
       })
     );
-    authToken.value = data.access_token;
-    clientId.value = data.client_id;
-    localStorage.setItem(tokenKey, data.access_token);
-    localStorage.setItem(clientIdKey, data.client_id);
+    const nextToken = data.access_token?.trim() || '';
+    const nextClientId = data.client_id?.trim() || '';
+    if (!nextToken || !nextClientId) {
+      throw new Error('登录响应缺少认证信息，请重试');
+    }
+    authToken.value = nextToken;
+    clientId.value = nextClientId;
+    localStorage.setItem(tokenKey, nextToken);
+    localStorage.setItem(clientIdKey, nextClientId);
     localStorage.setItem(phoneKey, phone.value);
     smsCode.value = '';
     void fetchMobileHome();