Plan exchange workspace and transaction journeys

docs/implementation.md

@@ -141,3 +141,15 @@ current packages, app/website commands, verification previews, analytics limits,
 skill location and contribution workflow. Local links and diff checks pass;
 commands and prerequisites were checked against repository configuration.
 Documentation only; no runtime tests were run.
+
+## Exchange workspace UX plan — task #24
+
+- Plan-only scope confirmed by the user; no application code changed.
+- [Exchange workspace plan](ux/exchange-workspace.md) defines accounts, top-up,
+  exchange, payout, Activity, Limits and Settings; account-owned language replaces
+  repeated page selectors in the proposed interface.
+- Includes authoritative quotes/status/limits, idempotent recovery, account-profile
+  language persistence, accessible/responsive behavior and semantic funnel metrics.
+- Standalone documentation branch `exchange-shell-24` from main. Future interface
+  implementation should incorporate KYC PR #21 and usage PR #23.
+- Validation: documentation links and diff checks; no runtime changes or tests.