feat(admin): 添加评论数据看板功能

- 新增数据看板页面，展示评论统计信息
- 添加 echarts 依赖用于数据可视化
- 实现后端统计接口，包括总数、按域名和最近7天数据
- 完善前端统计页面样式和交互
- 更新文档说明和版本更新指南

cwd-admin/src/router/index.ts

@@ -4,6 +4,7 @@ import LayoutView from '../views/LayoutView.vue';
 import CommentsView from '../views/CommentsView.vue';
 import SettingsView from '../views/SettingsView.vue';
 import DataView from '../views/DataView.vue';
+import StatsView from '../views/StatsView.vue';
 
 const routes: RouteRecordRaw[] = [
 	{
@@ -24,6 +25,11 @@ const routes: RouteRecordRaw[] = [
 				name: 'comments',
 				component: CommentsView
 			},
+			{
+				path: 'stats',
+				name: 'stats',
+				component: StatsView
+			},
 			{
 				path: 'settings',
 				name: 'settings',
@@ -55,4 +61,3 @@ router.beforeEach((to, from, next) => {
 	}
 	next();
 });
-