refactor: migrate customer and skill definition pages to use DashboardCrudPage component

- Replaced existing customer and skill definition page implementations with DashboardCrudPage for improved structure and functionality.
- Simplified state management and data fetching logic.
- Enhanced filtering and column definitions for better user experience.
- Updated translations to include new labels and processing messages.

web/messages/zh-CN.json

@@ -634,6 +634,7 @@
     "deleted": "已删除客户：{name}",
     "deleteFailed": "删除客户失败",
     "new": "新建",
+    "refresh": "刷新",
     "keywordPlaceholder": "姓名、手机、邮箱、公司、联系方式",
     "searchCompany": "搜索公司名称",
     "query": "查询",
@@ -932,6 +933,7 @@
     "toggleStatus": "{name} 状态切换",
     "edit": "编辑",
     "moreActions": "更多操作 {name}",
+    "processing": "处理中...",
     "stop": "停用",
     "delete": "删除",
     "loadingRows": "正在加载 AI Agent...",
@@ -1500,6 +1502,7 @@
     "restoring": "恢复中...",
     "restore": "恢复",
     "deleting": "删除中...",
+    "processing": "处理中...",
     "delete": "删除",
     "loadFailed": "加载 Skills 失败",
     "updated": "已更新 Skill：{name}",