Frontend first draft

frontend/pweb/lib/widgets/appbar/profile.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+class ProfileAvatar extends StatelessWidget {
+  const ProfileAvatar({super.key, this.avatarUrl, this.onLogout});
+
+  final String? avatarUrl;
+  final VoidCallback? onLogout;
+
+  @override
+  Widget build(BuildContext context) => PopupMenuButton<int>(
+    tooltip: AppLocalizations.of(context)!.profile,
+    onSelected: (value) {
+      if (value == 1) onLogout?.call();
+    },
+    itemBuilder: (_) => [
+      PopupMenuItem<int>(
+        value: 1, 
+        child: Row(
+          children: [
+            Icon(
+              Icons.logout,
+              size: 20,
+              color: Theme.of(context).iconTheme.color,
+            ),
+            const SizedBox(width: 8),
+            Text(AppLocalizations.of(context)!.logout),
+          ],
+        ),
+      ),
+    ],
+    child: CircleAvatar(
+      radius: 16,
+      foregroundImage: avatarUrl != null ? NetworkImage(avatarUrl!) : null,
+      child: avatarUrl == null ? const Icon(Icons.person, size: 24) : null,
+    ),
+  );
+}