完善搜索功能：

1. 添加搜索方法实现，支持关键词搜索
2. 实现取消搜索功能，清空搜索结果
3. 添加搜索结果展示组件
4. 优化搜索结果样式，使用Element Plus风格
5. 添加搜索输入验证，防止空搜索

src/components/Navigation/Index.vue

@@ -0,0 +1,73 @@
+<script setup lang="ts">
+import { AiFillHome } from 'vue-icons-plus/ai';
+import { h, ref } from 'vue';
+import { useRouter, type RouteLocationRaw } from 'vue-router';
+
+const router = useRouter()
+
+const navigation = ref([
+  {
+    title: '主页',
+    link: {
+      name: 'home',
+      path: '/home'
+    },
+    icon: h(AiFillHome)
+  },
+  {
+    title: '伊调研',
+    link: {
+      name: 'home',
+      path: '/home'
+    },
+    icon: h(AiFillHome)
+  },
+  {
+    title: '我的',
+    link: {
+      name: '',
+      path: '/survey'
+    },
+    icon: h(AiFillHome)
+  }
+]);
+
+/**
+ * Handle changing of navigation
+ * @param {object} nav - the navigation item selected
+ */
+function handleChangeNav(nav: any) {
+  const params = {} as RouteLocationRaw
+  //  如果有 name 表示，优先取 name 参数
+  nav.link.name.length != 0 ? (params.name = nav.link.name as string) : (params.path = nav.link.path)
+  router.push(params)
+}
+</script>
+
+<template>
+  <div class="navigation">
+    <section @click="handleChangeNav(item)" v-for="item in navigation" :key="item.title" class="navigation-item">
+      <component :is="item.icon"></component>
+      <div>{{ item.title }}</div>
+    </section>
+  </div>
+</template>
+
+<style scoped lang="scss">
+.navigation {
+  width: 100vw;
+  background-color: white;
+  display: flex;
+  flex-flow: row;
+  justify-content: space-around;
+  position: fixed;
+  bottom: 0px;
+  z-index: 10;
+}
+
+.navigation-item {
+  display: flex;
+  flex-flow: column nowrap;
+  align-items: center;
+}
+</style>