verification before payment and email fixes

frontend/pweb/lib/widgets/cooldown_hint.dart

@@ -0,0 +1,25 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/utils/cooldown_format.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+class CooldownHint extends StatelessWidget {
+  final int seconds;
+
+  const CooldownHint({super.key, required this.seconds});
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final l10n = AppLocalizations.of(context)!;
+    return Text(
+      l10n.payoutCooldown(formatCooldownSeconds(seconds)),
+      style: theme.textTheme.bodySmall?.copyWith(
+        color: theme.colorScheme.onSurfaceVariant,
+      ),
+      textAlign: TextAlign.center,
+    );
+  }
+}

frontend/pweb/lib/widgets/username.dart

@@ -1,43 +1,30 @@
 import 'package:flutter/material.dart';
 
+import 'package:pweb/controllers/email.dart';
+
 import 'package:pweb/generated/i18n/app_localizations.dart';
 
 
 class UsernameField extends StatelessWidget {
-  final TextEditingController controller;
-  final ValueChanged<bool>? onValid;
+  final EmailFieldController controller;
 
   const UsernameField({
     super.key,
     required this.controller,
-    this.onValid,
   });
 
-  String? _reportResult(String? msg) {
-    onValid?.call(msg == null);
-    return msg;
-  }
-
   @override
   Widget build(BuildContext context) => TextFormField(
-    controller: controller,
+    controller: controller.textController,
+    keyboardType: TextInputType.emailAddress,
     decoration: InputDecoration(
       labelText: AppLocalizations.of(context)!.username,
       hintText: AppLocalizations.of(context)!.usernameHint,
     ),
     validator: (value) {
-      return _reportResult((value?.isNotEmpty ?? false) ? null : AppLocalizations.of(context)!.usernameErrorInvalid);
-      // bool isValid = value != null && EmailValidator.validate(value);
-      // if (!isValid) {
-      //   return _reportResult(AppLocalizations.of(context)!.usernameErrorInvalid);
-      // }
-      // final tld = value.split('.').last;
-      // isValid = tlds.contains(tld);
-      // if (!isValid) {
-      //   return _reportResult(AppLocalizations.of(context)!.usernameUnknownTLD(tld));
-      // }
-      // return _reportResult(null);
+      final locs = AppLocalizations.of(context)!;
+      return controller.validate(value, locs.usernameErrorInvalid);
     },
-    onChanged: (value) => onValid?.call(value.isNotEmpty),
+    onChanged: controller.onChanged,
   );
 }