feat(cloudflare): add domain move and batch operations in group detail page

frontend/messages/fragments/cloudflare.en.json

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+{
+  "cloudflare": {
+    "move": "Move",
+    "batchMove": "Batch Move",
+    "batchRemove": "Batch Delete",
+    "selectedCount": "{count} selected",
+    "clearSelection": "Clear selection",
+    "moveDialog": {
+      "titleSingle": "Move domain \"{domain}\"",
+      "titleBatch": "Batch move domains ({count} items)",
+      "targetGroupLabel": "Target pointing group",
+      "targetGroupPlaceholder": "Select target group",
+      "noOtherGroups": "No other pointing groups available. Please create one first.",
+      "submit": "Confirm move",
+      "moving": "Moving..."
+    },
+    "batchRemoveDialog": {
+      "title": "Confirm batch domain deletion",
+      "desc": "Are you sure you want to remove {count} selected domains from the current group? This will also clean up DNS records on Cloudflare.",
+      "confirm": "Confirm delete",
+      "removing": "Deleting..."
+    },
+    "memberMoved": "Domain moved successfully",
+    "batchMoved": "Successfully moved {count} domains",
+    "batchRemoved": "Successfully deleted {count} domains"
+  }
+}

frontend/messages/fragments/cloudflare.zh-CN.json

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+{
+  "cloudflare": {
+    "move": "移动",
+    "batchMove": "批量移动",
+    "batchRemove": "批量删除",
+    "selectedCount": "已选择 {count} 项",
+    "clearSelection": "取消选择",
+    "moveDialog": {
+      "titleSingle": "移动域名「{domain}」",
+      "titleBatch": "批量移动域名（共 {count} 项）",
+      "targetGroupLabel": "目标指向分组",
+      "targetGroupPlaceholder": "请选择目标分组",
+      "noOtherGroups": "没有其他可用的指向分组，请先创建分组",
+      "submit": "确认移动",
+      "moving": "移动中..."
+    },
+    "batchRemoveDialog": {
+      "title": "确认批量删除域名",
+      "desc": "确认从当前分组移出已选中的 {count} 个域名吗？这将同时清理 Cloudflare 上的解析记录。",
+      "confirm": "确认删除",
+      "removing": "删除中..."
+    },
+    "memberMoved": "域名移动成功",
+    "batchMoved": "成功移动 {count} 个域名",
+    "batchRemoved": "成功删除 {count} 个域名"
+  }
+}