surface agent stream audit IDs

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

@@ -567,6 +567,11 @@ class ApiRepository {
       final streamed = await client
           .send(request)
           .timeout(const Duration(minutes: 10));
+      final auditId = streamed.headers['x-agent-audit-id'];
+      String withAuditId(String message) =>
+          auditId == null || auditId.isEmpty
+              ? message
+              : '$message\nمعرّف تتبع الطلب: $auditId';
       if (streamed.statusCode < 200 || streamed.statusCode >= 300) {
         final response = await http.Response.fromStream(streamed);
         _checkStatus(response);
@@ -601,9 +606,11 @@ class ApiRepository {
           eventName = null;
         }
       }
-      if (streamError != null) throw Exception(streamError);
+      if (streamError != null) throw Exception(withAuditId(streamError));
       final data = resultData;
-      if (data == null) throw Exception('انقطع اتصال البث قبل اكتمال الوكيل.');
+      if (data == null) {
+        throw Exception(withAuditId('انقطع اتصال البث قبل اكتمال الوكيل.'));
+      }
       return AgentRunResult.fromApiData(data);
     } finally {
       if (identical(_activeRequestClient, client)) _activeRequestClient = null;