feat: 添加测试页面及路由配置

新增测试页面视图组件并在主菜单中添加测试页入口，用于开发阶段的测试验证

src/renderer/views/test/TestView.vue

@@ -0,0 +1,17 @@
+<template>
+  <div class="flex items-center justify-center h-full">
+    <el-button type="primary" size="large" @click="showLogin = true">打开登录弹窗</el-button>
+    <LoginDialog v-model="showLogin" @login-success="onLoginSuccess" />
+  </div>
+</template>
+
+<script setup>
+import { ref } from 'vue';
+import LoginDialog from '@/components/LoginDialog.vue';
+
+const showLogin = ref(false);
+
+function onLoginSuccess(user) {
+  console.log('登录成功:', user);
+}
+</script>