Build exchange workspace and shared transaction services (#28)

README.md

@@ -172,8 +172,7 @@ limitations in the task and [implementation record](docs/implementation.md).
 
 ## Identity verification preview
 
-Open `/#/identity` or select **Explore verification & limits** from login or email
-confirmation. The optional flow covers passport and selfie selection, review,
+Open `/#/identity` or use **Limits → Verify identity** in the workspace. The optional flow covers passport and selfie selection, review,
 submission, pending review, approval, correction requests and denial in EN/RU.
 Use sample images only: photos are never uploaded and drafts are not persisted.
 
@@ -184,3 +183,20 @@ review decisions demonstrate the future backend contract. Higher limits apply
 only when returned by that service. Production review/storage/support and financial
 authorization are not connected. See the [UX plan](docs/ux/kyc.md) for state, error,
 privacy and measurement details.
+
+## Exchange workspace preview
+
+Choose **Explore your accounts** on login/email confirmation, or open `/#/accounts`.
+Currency cards show only available funds. Select an account, then top up, exchange
+or pay out through input → review → status. Review shows fees and actual debit and
+credit; status explains where the money is, including processing and failed returns.
+Activity, account balances and limits use one coherent demo ledger.
+
+Settings owns English/Russian account language. Limits links to optional KYC;
+no verification remains a valid account state with basic limits.
+
+The shared [wallet package](frontend/packages/sxchnge_wallet/README.md) is reusable
+by mobile clients. Transactions, rates, fees, recipients and profile storage are
+explicitly simulated and reset on reload. No real money moves. See the
+[workspace UX plan](docs/ux/exchange-workspace.md) and
+[implementation record](docs/implementation.md) for scope and validation.