[ui] remove TURN service toggle and simplify relay settings

docs/images/README.md

@@ -4,6 +4,7 @@
 
 ## 来源 / Sources
 
+- **2026-10-25** 删除“启用中继服务”开关后，从当前工作区组件重新生成 `desktop-settings-*` 和 `desktop-settings-network-*` 共 4 张中英文截图，展示可独立操作的“强制中继连接”。
 - **2026-10-25** 从 `ae6f81e8` 的实际 Slint 组件重新生成 16 张中英文截图：更新主窗口、常规设置、桌面墙设置、自托管及关于共 10 张，新增 IP 直连主界面、记住密码弹窗和网络设置共 6 张。使用 Slint 1.17.1、macOS arm64 和 2× 软件渲染。
 - 捕获程序在**工程外临时目录**中复用现有 [`slint_ui_smoke_test`](../../apps/desktop/tests/slint_ui_smoke_test.cpp) 的截图辅助函数，并注入演示界面状态；没有启动应用运行时、打开监听端口或建立远控会话。没有修改产品组件或工程内测试，临时源码、可执行程序与 PPM 均位于工程外。
 - 主窗口展示 ID / IP 模式切换、桌面墙入口和各自的近期设备；IP 模式展示地址编辑、六位密码和默认端口 52888，网络设置展示“启用 IP 直连”及关闭说明。IP 近期设备的 `LAN` 标记表示记录类型，不代表在线探测结果。
@@ -13,7 +14,7 @@
 - 缩略图沿用既有公开页面截图：`fixtures/source.png` 来自 [CrossDesk Xmake 源码页](https://github.com/kunkundi/crossdesk/blob/ios-support/xmake.lua)，`fixtures/website.png` 来自 [CrossDesk 官网](https://www.crossdesk.cn/)，两者采集于 2026-09-07。它们只用于展示预览效果，不代表这些页面正在对应设备上运行，页面中的版本信息也不代表最新发布。
 - `web-client.png` 保留 **2026-09-25** 从 [Web 客户端](https://web.crossdesk.cn/) 采集的 1280 × 720 连接首页，页面版本为 `2026.09.24.2`，ID 与密码为空。本次未重新采集 Web 页面；桌面设备预览继续复用这张图片。
 
-On **2026-10-25**, 16 images were rendered from the actual Slint components at `ae6f81e8`: ten refreshed images (main window, General settings, DeskHub settings, self-hosting, and About) and six additions (Direct IP mode, its password dialog, and Network settings), in Chinese and English. The capture-only program reused the existing helper functions in an external temporary directory, using Slint 1.17.1 on macOS arm64 at 2× scale. No product components or repository tests were changed, and no listeners or remote sessions were opened. IDs, IPs, passwords, device records, connection states, and update results are illustrative; `LAN` labels indicate record type, not an online check. The checked Remember password box is a demonstration choice. The other six desktop screenshots remain from 2026-10-19, public-page fixtures from 2026-09-07, and the Web image from 2026-09-25. Native mobile screenshots are not included.
+On **2026-10-25**, 16 images were rendered from the actual Slint components at `ae6f81e8`: ten refreshed images (main window, General settings, DeskHub settings, self-hosting, and About) and six additions (Direct IP mode, its password dialog, and Network settings), in Chinese and English. Later that day, the four General and Network settings images were refreshed from the working tree after removing Enable TURN Service, showing the independent Force Relay switch. The capture-only program reused the existing helper functions in an external temporary directory, using Slint 1.17.1 on macOS arm64 at 2× scale. Capture did not modify product components or repository tests, and no listeners or remote sessions were opened. IDs, IPs, passwords, device records, connection states, and update results are illustrative; `LAN` labels indicate record type, not an online check. The checked Remember password box is a demonstration choice. The other six desktop screenshots remain from 2026-10-19, public-page fixtures from 2026-09-07, and the Web image from 2026-09-25. Native mobile screenshots are not included.
 
 ## 文件 / Files
 
@@ -112,7 +113,6 @@ int main() {
       !RegisterFontAwesome(server->window())) return 2;
   window->set_local_id("123 456 789");
   window->set_local_password("Ab12Cd");
-  window->set_turn_enabled(true);
   window->window().set_size(slint::LogicalSize({640.0f, 472.0f}));
   return RunCaptureMode(options, window, stream, server);
 }