feat: 添加 Markdown 渲染组件，支持代码高亮和格式化

components/ChatBotMessage.vue

@@ -26,7 +26,10 @@ const props = defineProps({
       <span class="text-sm font-medium">{{ name }}</span>
     </div>
     <div class="rounded-lg bg-white/50 p-2 text-sm dark:bg-neutral-800/50">
-      <span v-if="message">{{ message }}</span>
+      <span v-if="message">
+        <Markdown :source="message" />
+        <!-- {{ message }} -->
+      </span>
       <span v-else class="flex items-center gap-1.5">
         <UIcon name="svg-spinners:3-dots-scale" class="text-lg -mt-0.5" />
         <p class="text-xs">思考中</p>