Copy a password (30s auto-clear armed), then copy something else from
another app before the timer fires: the tick emptied the clipboard anyway,
destroying the user's newer content. Guard with the Win32 clipboard sequence
number: SetText snapshots GetClipboardSequenceNumber, ClearIfOurs only
empties when it hasn't moved. Applied to the auto-clear timer AND the
clear-on-minimize path (same bug class); the explicit JS clipboard/clear
command stays unconditional (user-initiated).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
r-zakarya
3822c21194