Two fixes:
1. Remove base typography block from foliate-themes.css. The html/body
rules were unlayered CSS that overrode the chrome theme's layered
body styles, causing dark reading theme text colors (--reader-text)
to apply to the outer chrome UI on dark backgrounds. These styles
are only meant for the shadow DOM, which getCSS() already handles.
2. Move missing typography rules (img, blockquote, a, p orphans/widows)
into getCSS() so the shadow DOM still gets them.
3. Add sun/moon emoji indicators to the light/dark toggle switch.
john-okeefe
36de7cfa2f
