- backend: GET /api/dashboard/bans/by-jail endpoint
- JailBanCount + BansByJailResponse Pydantic models in ban.py
- bans_by_jail() service function with origin filter support
- Route added to dashboard router
- 17 new tests (7 service, 10 router); full suite 497 passed, 83% coverage
- frontend: JailDistributionChart component
- JailBanCount / BansByJailResponse types in types/ban.ts
- dashboardBansByJail endpoint constant in api/endpoints.ts
- fetchBansByJail() in api/dashboard.ts
- useJailDistribution hook in hooks/useJailDistribution.ts
- JailDistributionChart component (horizontal bar chart, Recharts)
- DashboardPage: full-width Jail Distribution section below Top Countries