Added placeholder for lastName and role addition functionality

frontend/pweb/lib/widgets/roles/create_role_dialog.dart

@@ -0,0 +1,85 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/models/role_draft.dart';
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+Future<RoleDraft?> showCreateRoleDialog(BuildContext context) {
+  return showDialog<RoleDraft>(
+    context: context,
+    builder: (dialogContext) => const _CreateRoleDialog(),
+  );
+}
+
+class _CreateRoleDialog extends StatefulWidget {
+  const _CreateRoleDialog();
+
+  @override
+  State<_CreateRoleDialog> createState() => _CreateRoleDialogState();
+}
+
+class _CreateRoleDialogState extends State<_CreateRoleDialog> {
+  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
+  final TextEditingController _nameController = TextEditingController();
+  final TextEditingController _descriptionController = TextEditingController();
+
+  @override
+  void dispose() {
+    _nameController.dispose();
+    _descriptionController.dispose();
+    super.dispose();
+  }
+
+  void _submit() {
+    final form = _formKey.currentState;
+    if (form == null || !form.validate()) return;
+    Navigator.of(context).pop(RoleDraft(
+      name: _nameController.text.trim(),
+      description: _descriptionController.text.trim(),
+    ));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final loc = AppLocalizations.of(context)!;
+    return AlertDialog(
+      title: Text(loc.invitationAddRoleTitle),
+      content: Form(
+        key: _formKey,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            TextFormField(
+              controller: _nameController,
+              decoration: InputDecoration(
+                labelText: loc.invitationRoleNameLabel,
+              ),
+              validator: (value) => (value == null || value.trim().isEmpty)
+                ? loc.invitationRoleNameRequired
+                : null,
+            ),
+            const SizedBox(height: 12),
+            TextFormField(
+              controller: _descriptionController,
+              minLines: 2,
+              maxLines: 3,
+              decoration: InputDecoration(
+                labelText: loc.invitationRoleDescriptionLabel,
+              ),
+            ),
+          ],
+        ),
+      ),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: Text(loc.cancel),
+        ),
+        ElevatedButton(
+          onPressed: _submit,
+          child: Text(loc.add),
+        ),
+      ],
+    );
+  }
+}