fix(auth): migrate frontend to Better Auth

src/views/auth/LoginView.vue

@@ -1,7 +1,8 @@
 <script setup lang="ts">
-import { computed, ref } from 'vue'
+import { ref } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { NAlert, NButton, NCard, NForm, NFormItem, NInput } from 'naive-ui'
+import { AuthClientError } from '@/lib/authClient'
 import { useAuthStore } from '@/stores/auth'
 
 const authStore = useAuthStore()
@@ -12,7 +13,7 @@ const email = ref(typeof route.query.email === 'string' ? route.query.email : ''
 const password = ref('')
 const error = ref('')
 const loading = ref(false)
-const needsEmailConfirmation = computed(() => error.value.includes('邮箱尚未验证'))
+const needsEmailConfirmation = ref(false)
 
 function getSafeRedirect(value: unknown) {
   if (typeof value !== 'string' || !value.startsWith('/')) return '/'
@@ -29,11 +30,13 @@ function getSafeRedirect(value: unknown) {
 
 async function handleLogin() {
   error.value = ''
+  needsEmailConfirmation.value = false
   loading.value = true
   try {
     await authStore.login(email.value, password.value)
     void router.push(getSafeRedirect(route.query.redirect))
   } catch (e: unknown) {
+    needsEmailConfirmation.value = e instanceof AuthClientError && e.code === 'EMAIL_NOT_VERIFIED'
     error.value = e instanceof Error ? e.message : '登录失败，请稍后重试'
   } finally {
     loading.value = false