Input0 v0.3.1

Bug Fixes

• prevent deadlock and source leak in single-key monitor

Code Refactoring

• remove superseded fn_monitor module

Features

• add SingleKey enum with keyCode and device-mask tables
• add is_single_key hotkey classifier
• implement CGEventTap-backed single-key monitor
• route all single modifier keys through CGEventTap
• expose single-key hotkey presets with per-key warnings
• surface Accessibility permission banner when single-key registration fails

Tests

• cover single-key branches in update_hotkey