The reader rendered HTML emails as black-on-black in dark mode: the WebView
background was transparent (so the near-black app surface showed through) and the
injected CSS set no text or background color, so the WebView fell back to its
default black text.
Wrap each email with explicit, theme-derived background, text, and link colors
(surface / onSurface / primary) plus a matching color-scheme, set the WebView
background to the surface color, and allow WebView algorithmic darkening where
supported as a backstop for emails that hardcode their own foreground colors.
Add JVM contrast guards: HtmlBodyTest pins the wrapper's readability contract
(explicit colors meeting WCAG AA), and ColorSchemeContrastTest audits the
fallback light/dark Material schemes' role pairs.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8
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