Elbow-on-the-keyboard guard: a PTT hold longer than 5 min (fixed, not a
setting) is released exactly like a keyup — pttActive off, mic muted — with a
toast 'Push to talk released after 5 minutes — press the key again to keep
talking.' A fresh press re-engages normally. One watchdog shared by the DOM
path and the desktop-global hotkey path; keydown auto-repeat no longer
restarts anything; non-PTT mode, deafen and the mic button are untouched.
Helper unit-tested with fake timers; verified headless with Playwright's clock:
held → still open at +4 min → released + toast at +5 min → re-press works.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
