Replaced single hardcoded release note with scrollable history of all
alpha releases (alpha.1 through alpha.9). Each release has version badge,
date, and categorized highlights. Inner container scrolls independently
with max-height 85vh. Current release highlighted with orange badge,
older releases in muted style with left border timeline.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
a2bf51615f