refactor(layout): 优化顶部菜单切换逻辑

- 移除了 Navbar 组件中 Hamburger 的 mouseenter 事件处理
- 保留 click 事件以切换新菜单显示状态

src/layout/components/Navbar.vue

@@ -1,7 +1,7 @@
 <template>
   <div class="navbar">
 <!--    <hamburger id="hamburger-container" :is-active="appStore.sidebar.opened" class="hamburger-container" @toggleClick="toggleSideBar" />-->
-    <hamburger id="hamburger-container" :is-active="appStore.newMenuShow" class="hamburger-container" @click="appStore.toggleNewMune" @mouseenter="appStore.toggleNewMune" />
+    <hamburger id="hamburger-container" :is-active="appStore.newMenuShow" class="hamburger-container" @click="appStore.toggleNewMune" />
     <breadcrumb id="breadcrumb-container" class="breadcrumb-container" v-if="!settingsStore.topNav" />
     <top-nav id="topmenu-container" class="topmenu-container" v-if="settingsStore.topNav" />