TASK22168 bundle C endpoint login/account consistency extension

memory-bank/refactor-plan-actions-index.md

@@ -746,6 +746,39 @@ Status key: `[x] done`, `[ ] pending`
     - `node tests/phase21/api-contract-slice1.test.cjs`
     - `npm run lint`
 
+### Phase 21 Bundle C extension snapshot (2026-03-19)
+
+Status key: `[x] done`, `[ ] pending`
+
+1. `[x]` Confirm user preference for larger same-branch bundle
+    - selected: Bundle C
+2. `[x]` Extend endpoint consistency in login/portal/account adjacency handlers
+    - `getlogin_api`
+    - `getportallogin_api`
+    - `getportalloginproxy_api`
+    - `getpersonalaccount_api`
+3. `[x]` Apply consistency pattern
+    - remove dead/noisy imports/logging remnants
+    - standardize structured negative-path responses (required input + catch/failure)
+    - preserve success contracts
+4. `[x]` Expand phase21 endpoint tests
+    - `tests/phase21/endpoint-handler-contract.test.cjs` expanded to 18 tests
+5. `[x]` Execute required validation
+    - `node tests/phase21/api-contract-slice1.test.cjs` -> pass
+    - `npm run lint` -> warnings only (pre-existing)
+
+### Phase 21 Bundle C rollback notes
+
+- Revert files:
+    - `pages/api/endpoint/getlogin_api.js`
+    - `pages/api/endpoint/getportallogin_api.js`
+    - `pages/api/endpoint/getportalloginproxy_api.js`
+    - `pages/api/endpoint/getpersonalaccount_api.js`
+    - `tests/phase21/endpoint-handler-contract.test.cjs`
+- Re-run:
+    - `node tests/phase21/api-contract-slice1.test.cjs`
+    - `npm run lint`
+
 ## Safe execution mode for migration chunks (required)
 
 To reduce terminal hangs during bulk migration work, run refactor chunks in **safe stepwise mode** instead of long chained commands.