fix: 登录失败时显示错误提示信息

frontend/src/utils/request.ts

@@ -32,6 +32,8 @@ api.interceptors.response.use(
       if (hadToken) {
         ElMessage.error('登录已过期，请重新登录')
         router.push('/login')
+      } else {
+        ElMessage.error(message)
       }
     } else {
       ElMessage.error(message)

frontend/src/views/auth/Login.vue

@@ -59,6 +59,9 @@ async function handleLogin() {
     if (user?.role === 'admin') router.push('/admin')
     else if (user?.role === 'supplier') router.push('/supplier')
     else router.push('/')
+  } catch (err: any) {
+    const msg = err.response?.data?.error || t('auth.loginFailed')
+    ElMessage.error(msg)
   } finally {
     loading.value = false
   }