Record workspace PR and final browser validation (#28)

docs/implementation.md

@@ -234,3 +234,7 @@ tests were needed. The PR is not merged.
   history and balances reset on reload. No receipt export, date pagination,
   notification preferences or security settings beyond an honest capability note.
   Backend adapters must supply these before production use; see the wallet README.
+- Delivery: [PR #29](https://git.sendico.io/tech/sxchnge/pulls/29), pushed and
+  unmerged. Task and PR have frontend label, tech owner and SXCHNGE project.
+  Browser demo walkthrough also completed exchange and payout, confirming source
+  currency handoffs and exact fee/debit/receipt values on the result screen.