- backend: GET /api/batches now returns acceptedCount/rejectedCount/
pendingCount/billedTotal/topRejectionReason/hasProblem per item
(one GROUP BY query + one ordered scan, no N+1)
- backend: 2 tests pin the 837p full-bucket case + the 835 zero case
- frontend: BatchSummary extended with 6 optional fields
(backwards compat preserved)
- frontend: new RecentBatchesWidget renders one row per batch with
status icon + billed total + accepted count + top rejection reason
- frontend: 837p rows show $ total + 'N/M accepted'; 835 rows show
payment count (Remittance has no batch-level total_charge)
- frontend: full-width row between KPI tiles and Activity on the
Dashboard; click navigates to /batches?batch=ID
- frontend: 3 component tests cover empty/clean/problem/835 branches
Nora