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/router/index.js

@@ -34,6 +34,12 @@ const router = createRouter({
       component: () => import('../views/CalendarView.vue'),
       meta: { requiresAuth: true },
     },
+    {
+      path: '/smart-classification',
+      name: 'smart-classification',
+      component: () => import('../views/SmartClassification.vue'),
+      meta: { requiresAuth: true },
+    }
   ],
 })