Every routes/*.js → .cts, with handler signatures typed against the shared
http Req/Res/Next types. Routes carry @ts-nocheck for now — they're thin glue
over the (fully typed) services, so full route-level type-checking is deferred;
the handler-param typing is a head-start. server.js + test requires updated to
the explicit .cts paths.
Behavior-preserving. Verified: check:server 0, typecheck:server 0, suite 226/226,
real boot → /api/health + /api/about 200 (all routes mount).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
POST /payments/quick had no dedupe and non-atomic INSERT+applyBalanceDelta,
unlike /payments/bulk. A double-click/retry/two-tab pay created a second
payment and dropped the balance twice; a mid-way failure left a payment with
no balance adjustment. Now checks the bill_id+paid_date+amount composite key
(idempotent 200) and wraps the write in db.transaction.
Test: tests/paymentsQuickRoute.test.js
Co-Authored-By: Claude Opus 4.8 <[email protected]>
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