feat: 重构云端变量记录页面，支持动态列和服务端分页

- 使用项目 DataTable 组件替换原生 table
- 根据记录数据动态生成表格列
- 支持服务端分页、搜索、日期筛选
- 添加单条/批量删除确认对话框
- 添加路由配置和国际化文本
- 更新 pnpm-lock.yaml 修复 Docker 构建问题

frontend/src/plugins/i18n/en.json

@@ -1935,7 +1935,30 @@
         "appRequired": "Please select application",
         "scope": "Scope"
       },
-      "createDescription": "Add a new cloud variable"
+      "createDescription": "Add a new cloud variable",
+      "records": {
+        "title": "Variable Records",
+        "description": "View records for variable {key}",
+        "user": "User",
+        "data": "Data",
+        "createdAt": "Created At",
+        "search": "Search",
+        "searchPlaceholder": "Search records...",
+        "startDate": "Start Date",
+        "endDate": "End Date",
+        "total": "{count} records total",
+        "maxRecords": "Max {count} records",
+        "notStreamType": "This variable is not a record type",
+        "deleteRecord": "Delete Record",
+        "deleteConfirm": "Are you sure you want to delete this record?",
+        "deleteSuccess": "Deleted successfully",
+        "deleteFailed": "Failed to delete",
+        "batchDelete": "Batch Delete",
+        "batchDeleteConfirm": "Are you sure you want to delete {count} selected records?",
+        "batchDeleteSuccess": "Batch delete successful",
+        "batchDeleteFailed": "Batch delete failed",
+        "noSelection": "Please select records to delete"
+      }
     },
     "cloudFunction": {
       "title": "Cloud Function",

frontend/src/plugins/i18n/zh.json

@@ -1924,7 +1924,30 @@
         "appRequired": "请选择应用",
         "scope": "作用域"
       },
-      "createDescription": "添加新的云端变量"
+      "createDescription": "添加新的云端变量",
+      "records": {
+        "title": "变量记录",
+        "description": "查看变量 {key} 的记录数据",
+        "user": "用户",
+        "data": "数据",
+        "createdAt": "创建时间",
+        "search": "查询",
+        "searchPlaceholder": "搜索记录...",
+        "startDate": "开始日期",
+        "endDate": "结束日期",
+        "total": "共 {count} 条记录",
+        "maxRecords": "最大 {count} 条",
+        "notStreamType": "该变量不是记录类型",
+        "deleteRecord": "删除记录",
+        "deleteConfirm": "确定要删除该条记录吗？",
+        "deleteSuccess": "删除成功",
+        "deleteFailed": "删除失败",
+        "batchDelete": "批量删除",
+        "batchDeleteConfirm": "确定要删除选中的 {count} 条记录吗？",
+        "batchDeleteSuccess": "批量删除成功",
+        "batchDeleteFailed": "批量删除失败",
+        "noSelection": "请选择要删除的记录"
+      }
     },
     "cloudFunction": {
       "title": "云端函数",