更改工具图标，从工具箱更换为螺丝刀扳手，以提升视觉一致性

src/components/NavBar.vue

@@ -20,7 +20,7 @@
         友链
       </el-menu-item>
       <el-menu-item @click="openLink('/tools')">
-        <i class="fa-solid fa-toolbox"></i>
+        <i class="fa-solid fa-screwdriver-wrench"></i>
         工具
       </el-menu-item>
       <el-menu-item @click="toggleDarkMode">

src/views/ToolsView.vue

@@ -1,7 +1,7 @@
 <template>
     <div class="tools-container">
       <h1>
-        <i class="fa-solid fa-toolbox"></i>工具
+        <i class="fa-solid fa-screwdriver-wrench"></i>工具
       </h1>
       <!-- 加载状态 -->
       <div v-if="loading" class="loading-container">