- Read character .key file from Saved Games / D2R install dir / APPDATA
- Auto-fill empty hotkeys in [char] section (inventory, belt, potions, etc.)
- Match skill slots to configured skills for validation
- Normalize key variants (left alt ~ alt, left shift ~ shift)
- params.ini values always take priority over detected bindings
- Warn on genuine mismatches between config and .key file
