Merges xmrcheckout/xmrcheckout main (7 commits since 655d037):
- Add Monero system status and reconciler heartbeat
- Surface Monero health status in UI (dashboard + invoice pages)
- Harden reconciler status heartbeat startup
- Avoid false Monero outage states in UI
- Cache Monero connectivity in system status
- Next.js security patch (15.5.9 → 15.5.14)
- Bump Monero Docker defaults to 0.18.4.6
Resolved conflicts in reconciler.py (kept our advisory lock + upstream
heartbeat), routes.py (kept both imports), README.md (kept both sections).
- POST/GET/DELETE /api/admin/users endpoints
- Admin UI at /admin with login, user list, create/delete
- Auth via ADMIN_API_KEY env var (separate from tenant auth)
- Tenants remain scoped to their own store only
jwinterm