Show accepted signup delivery without a second send step (#62)

frontend/app/lib/verification/page.dart

@@ -15,9 +15,10 @@ import '../routing/routes.dart';
 import '../generated/i18n/app_localizations.dart';
 
 class VerificationPage extends StatefulWidget {
-  const VerificationPage({super.key, this.email, this.token});
+  const VerificationPage({super.key, this.email, this.token, this.delivery});
   final String? email;
   final String? token;
+  final VerificationDelivery? delivery;
 
   @override
   State<VerificationPage> createState() => _VerificationPageState();
@@ -25,9 +26,12 @@ class VerificationPage extends StatefulWidget {
 
 class _VerificationPageState extends State<VerificationPage> {
   final _form = GlobalKey<FormState>();
-  late final _email = TextEditingController(text: widget.email);
+  late final _email = TextEditingController(
+    text: widget.delivery?.email ?? widget.email,
+  );
   late final _provider = VerificationProvider(
     context.read<VerificationService>(),
+    delivery: widget.delivery,
   );
   final _emailFocus = FocusNode();
   String? _recipient;
@@ -44,7 +48,7 @@ class _VerificationPageState extends State<VerificationPage> {
         if (!mounted) return;
         if (widget.token != null) {
           _provider.confirm(widget.token!);
-        } else if (_email.text.isNotEmpty) {
+        } else if (widget.delivery == null && _email.text.isNotEmpty) {
           _send();
         }
       });
@@ -58,14 +62,26 @@ class _VerificationPageState extends State<VerificationPage> {
   @override
   void didUpdateWidget(covariant VerificationPage oldWidget) {
     super.didUpdateWidget(oldWidget);
-    if (oldWidget.token == widget.token) return;
-    context.read<JourneyRecorder>().abandon(JourneyExit.navigation);
-    _provider.reset();
+    if (oldWidget.token == widget.token &&
+        oldWidget.email == widget.email &&
+        identical(oldWidget.delivery, widget.delivery)) {
+      return;
+    }
+    if (oldWidget.token != widget.token) {
+      context.read<JourneyRecorder>().abandon(JourneyExit.navigation);
+    }
+    _provider.reset(delivery: widget.delivery);
     _lastWasSend = false;
     _validated = false;
-    _email.clear();
+    _recipient = null;
+    _email.text = widget.delivery?.email ?? widget.email ?? '';
     WidgetsBinding.instance.addPostFrameCallback((_) {
-      if (mounted && widget.token != null) _provider.confirm(widget.token!);
+      if (!mounted) return;
+      if (widget.token != null) {
+        _provider.confirm(widget.token!);
+      } else if (widget.delivery == null && _email.text.isNotEmpty) {
+        _send();
+      }
     });
   }