Per-theme issue dots in sidebar fixture minimap (litmus-p5xo)
Show per-theme colored dots on the sidebar fixture minimap during compare.
- Added CompareIssueDots context signal with per-theme data
- Uses each theme’s foreground hex color for the dot
- Render colored dots per fixture in the minimap
- Each dot represents one theme’s issue count (tooltip shows name + count)
- Detail page clears compare dots, falls back to single badge
Summary of Changes
Added CompareIssueDots context signal. Compare page publishes per-theme issue data. Minimap renders colored dots (one per theme with issues) when on compare page, falls back to single badge on detail page. Detail page clears compare dots on mount.