Frontend first draft

frontend/pweb/lib/pages/errors/error.dart

@@ -0,0 +1,61 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/app/router/pages.dart';
+import 'package:pweb/widgets/vspacer.dart';
+import 'package:pweb/utils/error_handler.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+class ErrorPage extends StatelessWidget {
+  final String title;
+  final String errorMessage;
+  final String errorHint;
+
+  const ErrorPage({ 
+    super.key, 
+    required this.title,
+    required this.errorMessage, 
+    required this.errorHint,
+  });
+
+  @override
+  Widget build(BuildContext context) => Center(
+    child: Padding(
+      padding: const EdgeInsets.all(16.0),
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(Icons.error_outline, size: 72, color: Theme.of(context).colorScheme.error),
+          const VSpacer(),
+          Text(
+            title,
+            style: Theme.of(context).textTheme.titleLarge?.copyWith(color: Theme.of(context).colorScheme.error),
+            textAlign: TextAlign.center,
+          ),
+          const VSpacer(multiplier: 0.5),
+          ListTile(
+            title: Text(errorMessage, textAlign: TextAlign.center, style: Theme.of(context).textTheme.titleLarge),
+            subtitle: Text(errorHint, textAlign: TextAlign.center, style: Theme.of(context).textTheme.bodySmall),
+          ),
+          const VSpacer(multiplier: 1.5),
+          TextButton(
+            onPressed: () => navigate(context, Pages.root),
+            child: Text(AppLocalizations.of(context)!.goToMainPage),
+          ),
+        ],
+      ),
+    ),
+  );
+}
+
+Widget exceptionToErrorPage({
+  required BuildContext context,
+  required String title,
+  required String errorMessage,
+  required Object exception,
+}) => ErrorPage(
+  title: title, 
+  errorMessage: errorMessage, 
+  errorHint: ErrorHandler.handleError(context, exception),
+);