Final i18n fixes: Use consistent translation approach for all user messages

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

src/locales/en-US.json

@@ -609,5 +609,6 @@
   "请输入迭代次数": "Please enter iterations",
   "获取场景列表失败": "Failed to fetch scenario list",
   "搜索场景": "Search scenarios",
-  "节点": "Nodes"
+  "节点": "Nodes",
+  "确认删除节点吗": "Are you sure you want to delete this node?"
 }

src/locales/zh-CN.json

@@ -609,5 +609,6 @@
   "请输入迭代次数": "请输入迭代次数",
   "获取场景列表失败": "获取场景列表失败",
   "搜索场景": "搜索场景",
-  "节点": "节点"
+  "节点": "节点",
+  "确认删除节点吗": "确认删除节点吗？"
 }