New GTK settings with a dropdown+editor pattern across four tabs:
- Presets: select/add/delete prompt presets; edit name, keywords, hotkey, mode,
per-preset model/temperature, and a clearly-bordered prompt textfield.
- Engines: STT and LLM engine managers with green/red online-offline status
dots, add/edit/delete, active selector, and an STT record-and-benchmark Test.
- Input: input scheme + keys + quality-gate settings.
- General: microphone picker with a live sounddevice level meter, output,
language, notifications, launch-on-login toggle, and local-Whisper settings.
Adds audio.py (mic enumeration via pactl + LevelMeter) and autostart.py
(~/.config/autostart entry). Recorder + daemon honour the selected mic.
Requirements gain sounddevice + tomli-w.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Replace the tkinter panel with a GTK3 control panel (gtkui.py) + settings
dialog (gtksettings.py): rounded CSD window, gradient background, circular icon
avatars, hotkey pills, hover states, Ubuntu font. Runs on the GTK main loop,
unified with the AppIndicator tray (no tkinter event-loop pump). Status updates
marshalled via GLib.idle_add. Removes the old tkinter gui.py.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
