D3. Session end without unload

Chrome and Edge stopped firing unload on 22 September 2026, and only the LMS or IT can re-enable it. The player commits after every change, on visibilitychange: hidden and pagehide, offers a Quit button, sets cmi.core.exit = suspend from the first second, and never re-initialises after LMSFinish. The emulator closes windows abruptly and checks what the LMS kept.