Allow users to compare multiple groups side by side before deciding which to join.
Acceptance Criteria:
- Add 'Compare' checkbox to GroupCard
- Show comparison modal/page with selected groups (max 3)
- Compare: contribution amount, cycle length, members, status
- Highlight differences between groups
Files: new file src/components/GroupCompare.tsx, src/components/GroupCard.tsx, src/app/groups/page.tsx
Allow users to compare multiple groups side by side before deciding which to join.
Acceptance Criteria:
Files: new file
src/components/GroupCompare.tsx,src/components/GroupCard.tsx,src/app/groups/page.tsx