立项配置页初步优化

frontend/src/views/Login.vue

@@ -118,6 +118,7 @@ import { useAuthStore } from "../store/auth";
 import { useStudyStore } from "../store/study";
 import { getCachedCredential, setCachedCredential, clearCachedCredential } from "../utils/auth";
 import { TEXT, requiredMessage } from "../locales";
+import { consumeLogoutReason, LOGOUT_REASON_TIMEOUT } from "../session/sessionManager";
 
 const auth = useAuthStore();
 const router = useRouter();
@@ -143,6 +144,10 @@ let vantaEffect: any = null;
 
 // 初始化 Vanta.js 效果
 onMounted(() => {
+  const logoutReason = consumeLogoutReason();
+  if (logoutReason === LOGOUT_REASON_TIMEOUT) {
+    ElMessage.warning("长时间未操作，已自动退出登录，请重新登录");
+  }
   const cached = getCachedCredential();
   if (cached) {
     form.email = cached.email;
@@ -228,8 +233,13 @@ const onSubmit = async () => {
       router.push("/");
     }
   } catch (error: any) {
+    const status = error?.response?.status;
     const detail = error?.response?.data?.detail || error?.response?.data?.message;
-    ElMessage.error(detail || TEXT.modules.auth.authFailed);
+    if (!status || status >= 500) {
+      ElMessage.error("服务暂时不可用，请稍后重试");
+    } else {
+      ElMessage.error(detail || TEXT.modules.auth.authFailed);
+    }
   } finally {
     loading.value = false;
   }