- Recolor the in-app glyph (Design B) to a solid white master and generate a
black variant; the desktop/app icon set (build/icons) is now the white
master at all sizes (verified bundled white in the AppImage/deb)
- In-app icon switches with the existing data-theme: black in Light mode
(visible on the light panel) and white in Dark mode (visible on the
near-black panel); the desktop/application icon stays white
Introduce a theme layer on top of the existing CSS custom properties.
All color tokens now live in themes.css, scoped by a data-theme
attribute on <html>, so a theme is just a new token block plus a
dropdown option - no code changes needed. The Default theme preserves
the existing light/dark behavior; Neonflux adds an electric-cyan dark
theme.
The active theme is chosen via a Theme selector in the sidebar footer
and persisted in a new main-process settings file (userData
settings.json) through getTheme/setTheme IPC, so it survives restarts.
Hard-coded on-accent, selection, shadow and backdrop colors across the
renderer were converted to semantic tokens so every theme stays
consistent.
