Gene Johnson 84cb16d463 feat: update scroll.py to use theme message gradient ...

Add msg_gradient() helper function to render.py that applies message
(ntfy) gradient using the active theme's message_gradient property.
This replaces hardcoded magenta gradient in scroll.py with a theme-aware
approach that uses complementary colors from the active theme.

- Add msg_gradient(rows, offset) helper in render.py with fallback to
  default magenta gradient when no theme is active
- Update scroll.py imports to use msg_gradient instead of
  lr_gradient_opposite
- Replace lr_gradient_opposite() call with msg_gradient() in message
  overlay rendering
- Add 6 comprehensive tests for msg_gradient covering theme usage,
  fallback behavior, and edge cases

All tests pass (121 passed), no regressions detected.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

2026-03-16 02:55:17 -07:00

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