fix(images): 服务器镜像在创建时固定到仓库 digest，更换镜像需确认备份，安装器重建前先固定旧服并推送不可变版本标签

panel/src/i18n/resources/en-US/servers.json

@@ -129,6 +129,10 @@
   "edit_server_desc": "Configure display name, autostart policy, image, memory, CPU, and idle stop",
   "edit_server_desc_long": "Updating server spec. Fields left unchanged will retain their current values.",
   "edit_server_submit": "Save Config",
+  "edit_server_image_build": "build {{id}}",
+  "edit_server_image_pinned_hint": "Locked to build {{id}}: the tag moving to a newer build (an installer re-run, say) leaves this server alone; only changing the image here moves it.",
+  "edit_server_image_warning": "After saving, the server runs the build this tag points to right now — re-picking the current tag also gets its newest build. If the Minecraft version changes, the world is upgraded on its next start, and upgraded chunks can't be opened by the old version again.",
+  "edit_server_image_confirm": "I've backed up the world — change the image",
   "luckperms_group_name": "Group Name",
   "luckperms_node": "Permission Node",
   "luckperms_action": "Action",