- Inactive segments now render in the background colour (off) instead of dimmed.
- The 7-seg renderer left the foreground on the last segment drawn (now the
background colour), which hid MHz; re-apply the frequency theme colour before
drawing MHz so it reappears and matches the digits.
- Move the TX frequency line down 1px for a little more RX/TX separation.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>