Build exchange workspace and shared transaction services (#28)

frontend/app/lib/routing/router.dart

@@ -4,23 +4,101 @@ import 'package:flutter/widgets.dart';
 
 import 'package:go_router/go_router.dart';
 
+import 'package:sxchnge_wallet/sxchnge_wallet.dart';
+
 import '../auth/page.dart';
 import '../kyc/page.dart';
 import '../verification/page.dart';
+import '../workspace/accounts.dart';
+import '../workspace/activity.dart';
+import '../workspace/limits.dart';
+import '../workspace/operation.dart';
+import '../workspace/settings.dart';
+import '../workspace/shell.dart';
+import '../workspace/transfer.dart';
 import 'routes.dart';
 
 GoRouter createAppRouter() {
+  final topUpKey = GlobalKey<TransferPageState>();
+  final exchangeKey = GlobalKey<TransferPageState>();
+  final payoutKey = GlobalKey<TransferPageState>();
   final identityKey = GlobalKey<IdentityPageState>();
   return GoRouter(
     // Signup email is an in-memory navigation extra, never browser-history data.
     extraCodec: const _TransientExtras(),
     routes: [
-      GoRoute(
-        path: '/identity',
-        name: AppRoutes.identity,
-        builder: (context, state) => IdentityPage(key: identityKey),
-        onExit: (context, state) async =>
-            await identityKey.currentState?.allowExit() ?? true,
+      ShellRoute(
+        builder: (context, state, child) =>
+            WorkspaceShell(path: state.uri.path, child: child),
+        routes: [
+          GoRoute(
+            path: '/accounts',
+            builder: (context, state) => const AccountsPage(),
+            routes: [
+              GoRoute(
+                path: ':accountId',
+                builder: (context, state) =>
+                    AccountsPage(accountId: state.pathParameters['accountId']),
+              ),
+            ],
+          ),
+          GoRoute(
+            path: '/activity',
+            builder: (context, state) => const ActivityPage(),
+            routes: [
+              GoRoute(
+                path: ':operationId',
+                builder: (context, state) =>
+                    OperationPage(id: state.pathParameters['operationId']!),
+              ),
+            ],
+          ),
+          GoRoute(
+            path: '/limits',
+            builder: (context, state) => const LimitsPage(),
+          ),
+          GoRoute(
+            path: '/settings',
+            builder: (context, state) => const SettingsPage(),
+          ),
+          GoRoute(
+            path: '/top-up',
+            builder: (context, state) => TransferPage(
+              key: topUpKey,
+              kind: TransferKind.topUp,
+              source: state.extra is String ? state.extra as String : null,
+            ),
+            onExit: (context, state) async =>
+                await topUpKey.currentState?.allowExit() ?? true,
+          ),
+          GoRoute(
+            path: '/exchange',
+            builder: (context, state) => TransferPage(
+              key: exchangeKey,
+              kind: TransferKind.exchange,
+              source: state.extra is String ? state.extra as String : null,
+            ),
+            onExit: (context, state) async =>
+                await exchangeKey.currentState?.allowExit() ?? true,
+          ),
+          GoRoute(
+            path: '/payout',
+            builder: (context, state) => TransferPage(
+              key: payoutKey,
+              kind: TransferKind.payout,
+              source: state.extra is String ? state.extra as String : null,
+            ),
+            onExit: (context, state) async =>
+                await payoutKey.currentState?.allowExit() ?? true,
+          ),
+          GoRoute(
+            path: '/identity',
+            name: AppRoutes.identity,
+            builder: (context, state) => IdentityPage(key: identityKey),
+            onExit: (context, state) async =>
+                await identityKey.currentState?.allowExit() ?? true,
+          ),
+        ],
       ),
       GoRoute(
         path: '/',