22541 add semantic back crumb helper and consolidate edge breadcrumb branches

memory-bank/change-log.md

@@ -247,6 +247,34 @@ Follow-ups:
 
 - Next slice recommendation: consolidate remaining one-off inline breadcrumb `<li><Link ...>` blocks still present in edge branches (e.g., `/newappeal/[appealtypes]`, `/myportal/[appealtypes]`, `/case`) and consider introducing an optional `renderBackCrumb(...)` semantic wrapper for readability.
 
+### CL-22541-I: breadcrumbs edge branch consolidation + semantic back-crumb wrapper
+
+date: 2026-04-09  
+author: Cline  
+scope: `components/breadcrumbs.js`  
+type: change  
+rationale: Continue the same bounded breadcrumbs refactor cadence by consolidating remaining edge inline Link/back crumbs and introducing a semantic back-crumb wrapper for readability.
+impact: Refactor-only JSX deduplication/readability improvement; no intended route/auth/session/API/EN-CY/a11y behavior change.
+status: completed
+
+Summary:
+
+- Added semantic helper `renderBackCrumb(onClick, listItemClass?)` that delegates to `renderAnchorCrumb(...)` with existing back-link text.
+- Replaced remaining one-off inline edge crumbs in:
+    - `/newappeal/[appealtypes]` and `/myportal/[appealtypes]` (`currentSection === 9999` service-name link and back-link branch)
+    - `/case` search-results link crumb (including existing `router.back()` callback)
+    - `/myportal/representation` back-link branches now use `renderBackCrumb(...)`.
+- Preserved existing href targets, callback behavior, and class semantics (including special `govuk-breadcrumbs__link-item` usage).
+
+Validation:
+
+- `npx eslint components/breadcrumbs.js` -> pass.
+- `node tests/phase22/index.test.cjs` -> pass (combined suite).
+
+Follow-ups:
+
+- Next slice recommendation: consider extracting a small, route-keyed breadcrumb branch map/helper grouping in `components/breadcrumbs.js` (purely structural) to reduce the long inline conditional chain while keeping one-slice behavior parity.
+
 ### CL-00X: 22500 `components/elements/index.js` Phase 1 helper extraction
 
 date: 2026-04-07