Add font family select (9 monospace fonts) and font size +/- stepper
(8-24px) to SettingsTab global settings. Both controls apply live
preview via CSS custom properties (--ui-font-family, --ui-font-size)
and persist to SQLite. Restructure global settings from inline rows
to 2-column grid with labels above controls. initTheme() now restores
saved font settings on startup.
Generalize theme system from Catppuccin-only (4 flavors) to 11 themes
across 2 groups. New editor themes: VSCode Dark+, Atom One Dark,
Monokai, Dracula, Nord, Solarized Dark, GitHub Dark.
All themes map to the same 26 --ctp-* CSS custom properties, so every
component works unchanged. ThemeId replaces CatppuccinFlavor as primary
type. Theme store uses getCurrentTheme()/setTheme() with deprecated
wrappers. SettingsTab uses optgroup-based theme selector.