Record published PR stack and delivery validation

docs/implementation.md

@@ -69,3 +69,21 @@ is persisted by the application.
 
 The website and Flutter app are separate applications. The Flutter app currently
 has a web runner; the shared packages can be consumed by a future mobile app.
+
+## Published PRs
+
+| Order | PR | Branch → base | Implementation commit |
+| --- | --- | --- | --- |
+| 1 | [#7: Product layout and theme](https://git.sendico.io/tech/sxchnge/pulls/7) | `theme-1` → `main` | `d931805` |
+| 2 | [#8: Shared auth and verification](https://git.sendico.io/tech/sxchnge/pulls/8) | `auth-4` → `theme-1` | `27424ed` |
+| 3 | [#9: Localized app and routing](https://git.sendico.io/tech/sxchnge/pulls/9) | `routing-6` → `auth-4` | `10a278c` |
+
+All three implementation commits are pushed. PRs are open, assigned to `tech`,
+labeled `frontend`, and associated with the SXCHNGE project. Follow-up documentation
+commits are included in PR #9. Task references point to the delivering branches;
+older empty branches are historical only. No PR has been merged during delivery.
+
+Delivery validation passed: 56 frontend tests; formatting and all four Flutter
+analyses; 3 website tests, Astro check (zero errors/warnings), and website build.
+The app web build and browser checks passed during the immediately preceding
+routing task; delivery changed documentation and Git organization only.