feat(undo): 添加撤销/重做的中英文翻译

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

po/zh_CN.po

@@ -56,6 +56,14 @@ msgstr "下移"
 msgid "Clean Invalid"
 msgstr "一键清理"
 
+#: src/ui/main_window.c
+msgid "Undo"
+msgstr "撤销"
+
+#: src/ui/main_window.c
+msgid "Redo"
+msgstr "重做"
+
 #: src/ui/main_window.c
 msgid "OK"
 msgstr "确定"
@@ -364,6 +372,14 @@ msgstr "确定要继续吗？"
 msgid "Cleanup completed! Removed %d invalid or duplicate paths."
 msgstr "清理完成！共移除了 %d 个无效或重复路径。"
 
+#: src/controller/callbacks_nav.c
+msgid "Undo completed"
+msgstr "已撤销"
+
+#: src/controller/callbacks_nav.c
+msgid "Redo completed"
+msgstr "已重做"
+
 #: src/controller/callbacks_basic.c
 msgid "New Environment Variable"
 msgstr "新建环境变量"