2a95bcd53c
The home screen CaloriesCard now uses a circular ring (CustomPainter) instead of a LinearProgressIndicator. Ring colour is determined by the user's goal type (lose / maintain / gain) with inverted semantics for the gain goal — red means undereating, not overeating. Overflow beyond 100% is shown as a thinner second-lap arc in the same warning colour. Numbers (logged kcal, goal, remaining/overage) are displayed both inside the ring and in a stat column to the right. Adds docs/calorie_ring_color_spec.md with the full colour threshold specification per goal type. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>