frame_inject.py declares every Win32 signature, checks each result, frees
its remote buffers and closes handles. Uninstall only accepts our folder and
UEVR's own per-game settings folders, and keeps the receipt if anything can't
be removed. The injector's reply is parsed defensively. Rechecked on a real
Frame: install, three cold starts injected (33-35 s), clean uninstall.
Part of #26.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>