添加智能分类功能，支持获取未分类账单数量和列表；实现AI分类逻辑；更新相关API和前端视图

Web/src/views/SettingView.vue

@@ -16,7 +16,7 @@
       <p>账单处理</p>
     </div>
     <van-cell-group inset>
-      <van-cell title="智能分类" is-link />
+      <van-cell title="智能分类" is-link @click="handleSmartClassification" />
     </van-cell-group>
 
     <div class="detail-header">
@@ -101,6 +101,10 @@ const handleFileChange = async (event) => {
   }
 }
 
+const handleSmartClassification = () => {
+  router.push({ name: 'smart-classification' })
+}
+
 /**
  * 处理退出登录
  */