- Add app/theme.yml: colours (light/dark), semantic colours, callout
defaults, fonts (with bunny: provider support), font-size, line-height,
main-width, nav-width
- app/config.yml: add `theme: theme.yml` reference; remove font and
layout keys that now live in theme.yml
- index.html: add applyThemeYml() that reads the new theme.yml format
and derives all CSS custom properties (accent-rgb, nav-active-bg,
nav-hover-bg, table-header-bg, link-colour) from the 5 user keys per
mode; add --colour-info/warning/success/error CSS vars with hardcoded
defaults; add --line-height-body CSS var
- index.html: update loadFonts() to accept themeConfig, support
provider:name:weight format for Bunny Fonts and Google Fonts
- index.html: boot() fetches theme file named by config.theme, routes
to applyThemeYml() for new format or applyConfigTheme() for legacy;
falls back gracefully to hardcoded defaults when theme key is absent
https://claude.ai/code/session_015XtsgTMi8UtmgxEgb5Qt2c
