New compare entry flow (litmus-k3fj)
Strict 2-theme side-by-side compare: left = app theme, right = compared theme.
- Set MAX_COMPARE to 2, removed compact from compare page
- Added CompareButton component on theme cards
- Added CompareButton on detail page
- Added theme picker dropdowns in compare column headers
- Feel Lucky already works correctly with MAX_COMPARE=2
- Hardcoded 2-column grid, removed –compare-cols CSS var
Summary of Changes
Simplified compare to strict 2-theme side-by-side. Added CompareButton component (compare against app theme) on cards and detail page. Added theme picker dropdowns in compare column headers to swap themes without leaving the page. Hardcoded 2-column grid layout. MAX_COMPARE reduced to 2.