- Refactor exec_with_args to use *args/**kwargs instead of tuple arguments
- Add *args/**kwargs to all command execute functions for consistency
- Support multiple key bindings per command in registration
- Add character-based key binding support via get_char() in KeyMapper
- Make execute_plugin async and use asyncio.run for plugin execution
- Use MIME type from Gio content_type instead of language for ftype
- Replace CSS-based zoom (px1-px99 classes) with Pango.FontDescription
- Fix bug in multi-insert: insert at start_itr instead of end_itr
- Add Pango-based font setup for mini-view widget
- Revamp stylesheet with Light Blue-Grey Glass theme
