ThemeController.select() applied live but never persisted, so every restart reset
to the first bundled theme. Add wireThemePersistence (facade): on theme change
write app.theme (global default) + project.theme (the open repo's
.clide/settings.yaml); on settings change — notably when a repo opens and its
project values load — restore the most specific saved theme (project then app).
The name encodes the -hc variant so high-contrast persists; an unknown/removed
theme is ignored so a stale value can't wedge startup.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>