feat(gui): 新增重新打包3MF按钮，选择解压目录自动更新MD5并打包

a1_swap_mod_packer/i18n/en.json

@@ -95,5 +95,10 @@
   "gui.button.close": "Close",
   "gui.dialog.view_gcode.title": "View Swap G-code",
   "gui.options.view_gcode": "View",
-  "gui.dialog.build_result.title": "Build Result"
+  "gui.dialog.build_result.title": "Build Result",
+  "gui.options.repack_3mf": "Repack 3MF",
+  "gui.dialog.repack_select_folder": "Select unpacked 3MF folder",
+  "gui.dialog.repack_success.title": "Repack Complete",
+  "gui.dialog.repack_success.text": "3MF has been repacked:\n{path}",
+  "gui.dialog.repack_no_content_types": "[Content_Types].xml not found. Not a valid unpacked 3MF directory."
 }

a1_swap_mod_packer/i18n/zh_CN.json

@@ -95,5 +95,10 @@
   "format.unknown": "未知",
   "gui.button.close": "关闭",
   "gui.dialog.view_gcode.title": "查看换盘 G-code",
-  "gui.dialog.build_result.title": "构建结果"
+  "gui.dialog.build_result.title": "构建结果",
+  "gui.options.repack_3mf": "重新打包 3MF",
+  "gui.dialog.repack_select_folder": "选择解压后的 3MF 文件夹",
+  "gui.dialog.repack_success.title": "重新打包完成",
+  "gui.dialog.repack_success.text": "已重新打包为 3MF 文件：\n{path}",
+  "gui.dialog.repack_no_content_types": "未找到 [Content_Types].xml，不是有效的 3MF 解压目录。"
 }