## Problem and outcome
The App console could show a launch address that still contained private activation data when copied, while the terminal hyperlink opened a cleaned address. On narrow phones, playback controls could wrap into a second row and cover too much of the video. The handoff now presents the same safe, activation-preserving address everywhere, and the playback bar keeps one compact row with a shorter flexible volume control.
## Changes
- Sanitize the App activation URL before rendering both copyable console output and terminal hyperlinks, preserving App handoff without exposing credentials.
- Keep the mobile playback bar on one row; let the volume slider shrink with the available width and hide the nonessential percentage readout at the narrowest sizes.
- Add bilingual macOS browser/App audio-capture troubleshooting guidance and record the physical-device boundary.
## Verification
- `npm run check`: TypeScript, 73 test files / 1008 tests, and the Web production build passed.
- `npm run check:go-core`: Go tests, formatting, vet and supported core target builds passed.
- `node scripts/check-docs.mjs` and `scripts/check-project-state.ps1` passed.
- Narrow-layout browser checks covered 320px, 360px, 375px, 390px, 430px, 768px and 1280px widths without wrapping or horizontal overflow.
- The interaction prototype remains local and uncommitted for later acceptance; it is not part of this PR.
## Release notes
### 中文
这是一个维护版本，改善 App 启动链接的安全提示和手机上的播放控制体验。
#### 修复
- 修复 App 控制台复制链接时可能带出私有激活参数的问题。复制、终端链接和手动打开地址现在保持一致，并继续支持自动唤起 App。
- 修复窄屏手机上的播控挤成两行、遮挡画面的问题。控件保持单行，音量滑条会按可用空间缩短，过窄时隐藏非关键的百分比读数。
- 补充 macOS 浏览器与 App 采集声音选项的排查说明，明确不同浏览器和系统版本的能力边界。
#### 兼容性
本版本不改变通信协议、配置格式或存储格式。App 公网邀请、本地模式和已部署站点按原方式更新即可；已打开的页面刷新后使用新的播控布局。
### English
This maintenance release improves App launch links and playback controls on phones.
#### Fixes
- Fixed the App console sometimes exposing private activation parameters in a copied launch address. The copied address, terminal hyperlink and manual URL now match while still supporting App handoff.
- Fixed narrow phone layouts wrapping playback controls into a second row and covering the video. Controls stay on one row, the volume slider shrinks with the available space, and the nonessential percentage readout hides when space is tight.
- Added macOS troubleshooting guidance for browser and App audio capture, including the current browser and OS support boundaries.
#### Compatibility
This release changes no wire protocol, configuration format or storage format. Update the App for public invitations or Local mode, or update the deployed site as usual; refresh an open page to use the new playback layout.
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