Remove 3x-ui integration from the panel.

Drop API sync, multi-panel registry, and UI/protocol paths; keep DB columns only for compatibility with existing installs.

Co-authored-by: Cursor <cursoragent@cursor.com>

translations/zh.json

@@ -184,7 +184,7 @@
   "guest_password_keep": "留空以保留当前密码",
   "guest_clear_password": "取消密码保护",
   "guest_allow_create": "允许访客创建新配置",
-  "guest_allow_create_hint": "为访客用户创建配置（3x-ui VLESS 或所选服务器协议）。",
+  "guest_allow_create_hint": "使用所选服务器协议为访客用户创建配置。",
   "guest_access_btn": "以访客继续",
   "guest_access_login_hint": "无需账号",
   "guest_title": "访客访问",
@@ -218,13 +218,6 @@
   "invite_duration_short": "有效期",
   "invite_duration_starts_hint": "获取后配置将有效 {} 天",
   "invite_config_expires_at": "配置有效至：{}",
-  "invite_inbound_hint": "一次性选择所需的 VLESS 入站",
-  "invite_inbound_loading": "加载入站中…",
-  "invite_inbound_empty": "未找到 VLESS 入站",
-  "invite_inbound_need_xui": "请先在设置中配置 3x-ui",
-  "invite_inbound_required": "请选择 VLESS 入站",
-  "invite_sub_url_missing_title": "未设置订阅 URL",
-  "invite_sub_url_missing_hint": "在 设置 → 3x-ui 中填写订阅基础 URL，以便发放 /sub/… 配置。",
   "invite_sub_tab": "订阅",
   "days_short": "天",
   "invite_clear_expires": "清除过期时间",
@@ -287,29 +280,6 @@
   "api_key_label": "API 密钥",
   "enable_sync": "开启同步",
   "sync_hint": "将根据 Remnawave 数据自动创建、禁用和删除用户",
-  "xui_url_label": "3x-ui 地址",
-  "xui_url_hint": "包含协议、端口和 webBasePath（如有）",
-  "xui_sub_url_label": "订阅基础 URL",
-  "xui_sub_url_hint": "公共 /sub 基础地址，末尾不要斜杠（如 https://host:2096/sub）。",
-  "xui_api_token_label": "API Token（推荐）",
-  "xui_api_token_placeholder": "Settings → Security → API Token",
-  "xui_api_token_hint": "若已设置，将跳过用户名/密码登录",
-  "xui_username_label": "3x-ui 用户名",
-  "xui_password_label": "3x-ui 密码",
-  "xui_sync_hint": "3x-ui 客户端将按 email 同步为面板用户",
-  "xui_inbound_label": "VLESS 入站",
-  "xui_inbound_auto": "自动（第一个 VLESS 入站）",
-  "xui_inbound_hint": "创建 3x-ui VLESS 配置时使用。请先在 3x-ui 中创建 VLESS 入站。",
-  "xui_servers_title": "3x-ui 服务器",
-  "xui_servers_hint": "可添加多个 3x-ui 面板。创建配置时按名称选择服务器，并使用其订阅基础 URL。",
-  "xui_servers_empty": "暂无 3x-ui 服务器。请点击添加。",
-  "xui_servers_manage_hint": "面板与订阅地址在下方「3x-ui 服务器」中管理。",
-  "xui_server_add": "添加服务器",
-  "xui_server_name_label": "名称 / 描述",
-  "xui_server_name_hint": "显示在邀请与用户表单中（如 US、NL）。",
-  "xui_server_select_label": "3x-ui 服务器",
-  "xui_server_select_hint": "选择签发订阅 URL 的 3x-ui 面板。",
-  "xui_server_delete_confirm": "从面板删除此 3x-ui 服务器？",
   "sync_now_btn": "🔄 立即同步",
   "delete_sync_btn": "🗑 删除同步数据",
   "auto_create_conns": "自动创建连接",