- Guard enforce_allowed_game() and _guard_installed_games() against
current_app_id=None so they never treat all games as unauthorized
- Add early return in _enforce_loop_iteration when no game is assigned
- Wrap State.load() in enforce loop with error handling for corrupt files
- Switch all config/cache file writes to atomic (tmpfile + rename)
- Add robust error handling to State.load() for corrupt JSON
- Update tests for new behavior and add coverage for atomic writes