feat：登录功能迁移新登录页面

src/components/layout/AppHeader.vue

@@ -88,7 +88,7 @@
       </div> -->
 
       <!-- 登录按钮 -->
-      <div v-if="!userStore.isLoggedIn" class="auth-buttons" @click="showLoginModal">
+      <div v-if="!userStore.isLoggedIn" class="auth-buttons" @click="goToLoginPage">
         <div class="auth-combined-btn">
           <span class="auth-login">{{ t('header.login') }}</span>
         </div>
@@ -452,7 +452,12 @@ const handleUserMenuSelect = (key: string) => {
   }
 }
 
-// 显示登录模态框
+// 跳转到登录页面
+const goToLoginPage = () => {
+  router.push('/login')
+}
+
+// 显示登录模态框（保留以备后续需要）
 const showLoginModal = () => {
   loginModalVisible.value = true
 }