fix(faq): repair category schema and icons

frontend/src/views/Faq.vue

@@ -2,7 +2,7 @@
   <div class="page ctms-page-shell page--flush medical-consult-page">
     <div class="page-bg-dots"></div>
     <section class="faq-hero">
-      <h1><i class="fas fa-book-medical hero-title-icon"></i>项目知识库</h1>
+      <h1><el-icon class="hero-title-icon"><Collection /></el-icon>项目知识库</h1>
       <div class="hero-tools">
         <el-autocomplete
           v-model="keyword"
@@ -74,7 +74,7 @@
 <script setup lang="ts">
 import { computed, onMounted, ref, watch } from "vue";
 import { ElMessage } from "element-plus";
-import { Plus, Search } from "@element-plus/icons-vue";
+import { Collection, Plus, Search } from "@element-plus/icons-vue";
 import { fetchFaqCategories, fetchFaqItems } from "../api/faqs";
 import FaqCategoryPanel from "../components/FaqCategoryPanel.vue";
 import FaqList from "../components/FaqList.vue";