Email Confirmation and refactor for snackbar

frontend/pweb/lib/pages/signup/confirmation/card/badge.dart

@@ -0,0 +1,39 @@
+part of 'card.dart';
+
+
+class _SignupConfirmationEmailBadge extends StatelessWidget {
+  final String email;
+
+  const _SignupConfirmationEmailBadge({required this.email});
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final colorScheme = theme.colorScheme;
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
+      decoration: BoxDecoration(
+        color: colorScheme.surfaceContainerHighest.withValues(alpha: 0.6),
+        borderRadius: BorderRadius.circular(12),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(
+            Icons.alternate_email,
+            size: 18,
+            color: colorScheme.primary,
+          ),
+          const SizedBox(width: 8),
+          SelectableText(
+            email,
+            style: theme.textTheme.bodyMedium?.copyWith(
+              fontWeight: FontWeight.w600,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}