Add web research and source file reading

SovereignAI-Starter/flutter_app/lib/core/network/api_repository.dart

@@ -205,6 +205,45 @@ class ApiRepository {
     }
   }
 
+  Future<String> searchWeb(String query, {String? model}) async {
+    final client = http.Client();
+    _activeRequestClient = client;
+    try {
+      final request = http.Request(
+        'POST',
+        Uri.parse('$_baseUrl/v1/web/search'),
+      )
+        ..headers['Content-Type'] = 'application/json'
+        ..body = jsonEncode({
+          'query': query,
+          'max_results': 5,
+          if (model != null) 'model': model,
+        });
+      final streamed = await client
+          .send(request)
+          .timeout(const Duration(minutes: 10));
+      final response = await http.Response.fromStream(streamed);
+      _checkStatus(response);
+      final data = jsonDecode(response.body) as Map<String, dynamic>;
+      final result = data['result'] as String? ?? '';
+      final sources = (data['sources'] as List<dynamic>? ?? const [])
+          .cast<Map<String, dynamic>>();
+      if (sources.isEmpty) return result;
+      final sourceList = sources.map((source) {
+        final index = source['index'];
+        final title = source['title'] as String? ?? 'مصدر';
+        final url = source['url'] as String? ?? '';
+        final status = source['status'] as String?;
+        final note = status == 'snippet_only' ? ' (مقتطف فقط؛ تعذر فتح الصفحة)' : '';
+        return '[$index] [$title]($url)$note';
+      }).join('\n');
+      return '$result\n\nالمصادر:\n$sourceList';
+    } finally {
+      if (identical(_activeRequestClient, client)) _activeRequestClient = null;
+      client.close();
+    }
+  }
+
   Stream<String> completeStream(
     List<ChatMessage> messages, {
     String? model,