fix live camera preview recovery

client/src/lib/changelog.ts

@@ -8,6 +8,25 @@ export type ChangeLogEntry = {
 };
 
 export const CHANGE_LOG_ENTRIES: ChangeLogEntry[] = [
+  {
+    version: "2026.03.17-live-camera-preview-recovery",
+    releaseDate: "2026-03-17",
+    repoVersion: "06b9701",
+    summary: "修复实时分析页标题乱码、同步观看残留状态导致的黑屏，以及切回本机摄像头后预览无法恢复的问题。",
+    features: [
+      "runtime 标题恢复逻辑新增更严格的乱码筛除与二次 UTF-8 解码兜底，`服...`、带替换字符的脏标题现在会优先恢复为正常中文，无法恢复时会安全回退到稳定默认标题",
+      "同步观看退出时会完整重置 viewer 轮询、连接标记和帧版本，不再把旧 viewer 状态残留到 owner 或空闲态，避免页面继续停留在黑屏或“等待同步画面”",
+      "本地摄像头预览新增独立重绑流程和多次 watchdog 重试，即使浏览器在首帧时没有及时绑定 `srcObject` 或 `play()` 被短暂打断，也会自动恢复预览",
+      "视频区域是否显示画面改为按当前 runtime 角色分别判断，避免 viewer 的旧连接状态误导 owner 模式，导致本地没有预览时仍隐藏占位提示",
+    ],
+    tests: [
+      "pnpm check",
+      "pnpm vitest run client/src/lib/liveCamera.test.ts",
+      "pnpm exec playwright test tests/e2e/app.spec.ts --grep \"live camera\"",
+      "pnpm build",
+      "线上 smoke: `curl -I https://te.hao.work/`，并检查页面源码中的 `/assets/index-*.js`、`/assets/index-*.css`、`/assets/pose-*.js` 已切换到新构建且返回正确 MIME",
+    ],
+  },
   {
     version: "2026.03.16-live-camera-runtime-refresh",
     releaseDate: "2026-03-16",