audit: 2026-05-30 full-codebase audit — report, issues, docs, runbooks

Full-codebase-audit 2026-05-30 outputs:
- Audit report: 09 - Audits/Full Codebase Audit - 2026-05-30.md
- 81 issue files ISSUE-055..135 (decisions + 1 skipped no-brainer).
- Scanner docs from scratch (was zero): architecture, data model, API ref, payment
  flow, operations runbook + repo README.
- Doc-sync updates across API reference, data models, flows, design system.
- Secret Rotation Runbook (08 - Operations) for the exposed credentials.
- Reusable workflow guide (07 - Development) + .claude/workflows/full-codebase-audit.js.

Issues remain status:open intentionally — the code fixes are uncommitted-then-committed
working-tree changes per repo and aren't "resolved" until merged/deployed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Issues/ISSUE-087-frontend-getpaymentstatus-and-checkpaymentstatus-hit-different.md

@@ -0,0 +1,38 @@
+---
+issue: 087
+title: "Frontend: getPaymentStatus and checkPaymentStatus hit different endpoints"
+severity: medium
+domain: Payment
+labels: [bug, frontend]
+status: open
+created: 2026-05-30
+source: Full Codebase Audit 2026-05-30
+---
+
+# Frontend: getPaymentStatus and checkPaymentStatus hit different endpoints
+
+**Severity:** medium
+**Domain:** Payment
+**Labels:** bug, frontend
+
+## Description
+
+`src/actions/payment.ts:62` has two functions — `getPaymentStatus` and `checkPaymentStatus` — that appear to serve the same purpose but call different endpoints (`/payment/:id/status` vs `/payment/payments/:id/status`). Only one of these can be the correct backend path.
+
+## Options
+
+1. Point `getPaymentStatus` at the registry-defined `/payment/:id/status` and deduplicate with `checkPaymentStatus`.
+2. Add `/payment/payments/:id/status` to the endpoints registry if backend truly serves it.
+3. Remove the redundant `getPaymentStatus` and migrate callers to `checkPaymentStatus`.
+
+## Recommendation
+
+Verify the real backend route, then collapse to a single function using the registry path. Could break callers, so verify before removing.
+
+## Affected Files
+
+- `frontend/src/actions/payment.ts:62`
+
+## References
+
+- [Full Codebase Audit 2026-05-30](../09%20-%20Audits/Full%20Codebase%20Audit%20-%202026-05-30.md) — DEC-16