fix(panel): 建服表单按后端规则即时校验名称和子域名，控制台命令历史的下键不再跳到最早一条，补请求体测试

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

@@ -41,6 +41,7 @@
   "console_offline_title": "Console is offline",
   "console_offline_body": "The live console attaches automatically as soon as the server is running.",
   "my_servers_breadcrumb": "My servers",
+  "command_label": "Server command",
   "command_placeholder": "Type a command… e.g. list",
   "log_connecting": "Connecting…",
   "log_live": "Live",
@@ -132,9 +133,11 @@
   "create_server_desc": "Pick from whitelisted images and sizes — the platform provisions the rest. No raw cluster config is exposed here.",
   "create_server_name": "Name",
   "create_server_name_placeholder": "survival",
+  "create_server_name_hint": "3–32 lowercase letters, digits or hyphens.",
+  "create_server_name_invalid": "Use 3–32 lowercase letters, digits or hyphens, with no hyphen at either end.",
+  "create_server_name_reserved": "“{{name}}” is kept for the platform. Pick another.",
   "create_server_subdomain": "Subdomain",
   "create_server_subdomain_placeholder": "survival",
-  "create_server_subdomain_invalid": "Lowercase letters, digits and hyphens only.",
   "create_server_subdomain_hint": "Will be reachable at {{host}}",
   "create_server_display_name": "Display name (optional)",
   "create_server_display_name_placeholder": "Survival World",

panel/src/i18n/resources/zh-CN/servers.json

@@ -41,6 +41,7 @@
   "console_offline_title": "控制台未连接",
   "console_offline_body": "服务器运行后，实时控制台将自动连接。",
   "my_servers_breadcrumb": "我的服务器",
+  "command_label": "服务器命令",
   "command_placeholder": "输入命令…如 list",
   "log_connecting": "连接中…",
   "log_live": "实时",
@@ -132,9 +133,11 @@
   "create_server_desc": "从白名单镜像及规格中选择，平台自动处理其余配置。不暴露原始集群配置。",
   "create_server_name": "名称",
   "create_server_name_placeholder": "survival",
+  "create_server_name_hint": "3–32 位小写字母、数字或连字符。",
+  "create_server_name_invalid": "请用 3–32 位小写字母、数字或连字符，首尾不能是连字符。",
+  "create_server_name_reserved": "“{{name}}” 是平台保留的名字，请换一个。",
   "create_server_subdomain": "子域名",
   "create_server_subdomain_placeholder": "survival",
-  "create_server_subdomain_invalid": "仅支持小写字母、数字和连字符。",
   "create_server_subdomain_hint": "访问地址：{{host}}",
   "create_server_display_name": "显示名称（选填）",
   "create_server_display_name_placeholder": "生存世界",