Aurora is a dark theme (bg #0a0815, card rgba(25,20,50,0.8)) but raw HTML
elements like h2/h4/li/a inside the card had no inline color — rendering
as browser-default black text and blue links, unreadable on dark backgrounds.
Fix: add .card-body CSS rules to all 11 Aurora templates covering h1-h6,
links, and li elements. Also add .aurora-content wrapper for user-generated
HTML (Release.RenderedNote, .Body, .RenderedContent) with full color
coverage for code, pre, blockquote, hr, img.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>