docs: 将“数据迁移”统一更名为“数据管理”

更新路由、侧边栏、页面标题及文档中的相关术语，以更准确地反映该模块的实际功能。数据导出和导入功能现在明确标注为“评论数据导出”和“评论数据导入”。

docs/.vitepress/configs/sidebar.js

@@ -14,7 +14,7 @@ export const rootSidebar = [
 			{ text: '后台设置', link: '/function/admin-panel' },
 			{ text: '通知邮箱', link: '/function/email-reminder' },
 			{ text: '安全设置', link: '/function/security-settings' },
-			{ text: '数据迁移', link: '/function/data-migration' },
+			{ text: '数据管理', link: '/function/data-migration' },
 			{ text: '点赞开关', link: '/function/feature-settings' },
 			{ text: '数据统计', link: '/function/data-statistics' },
 		],
@@ -34,7 +34,7 @@ export const apiSidebar = [
 					{ text: '概览', link: '/api/admin' },
 					{ text: '身份认证', link: '/api/admin/auth' },
 					{ text: '评论管理', link: '/api/admin/comments' },
-					{ text: '数据迁移', link: '/api/admin/data-migration' },
+					{ text: '数据管理', link: '/api/admin/data-migration' },
 					{ text: '评论设置', link: '/api/admin/settings' },
 					{ text: '邮件通知', link: '/api/admin/email-notify' },
 					{ text: '统计数据', link: '/api/admin/stats' },