Fix ACP task response display parsing

lib/runtime/go_task_service_client.dart

@@ -714,15 +714,7 @@ GoTaskServiceResult goTaskServiceResultFromAcpResponse(
     }
     return errorText;
   }();
-  final responseText =
-      (result['output']?.toString().trim().isNotEmpty == true
-              ? result['output'].toString().trim()
-              : result['summary']?.toString().trim().isNotEmpty == true
-              ? result['summary'].toString().trim()
-              : result['resultSummary']?.toString().trim().isNotEmpty == true
-              ? result['resultSummary'].toString().trim()
-              : result['message']?.toString().trim() ?? '')
-          .trim();
+  final responseText = _extractGoTaskDisplayText(result);
   final primaryText =
       (completedMessage?.trim().isNotEmpty == true
               ? completedMessage!.trim()
@@ -748,6 +740,100 @@ GoTaskServiceResult goTaskServiceResultFromAcpResponse(
   );
 }
 
+String _extractGoTaskDisplayText(Object? value, [Set<Object>? visited]) {
+  final seen = visited ?? <Object>{};
+  if (value == null) {
+    return '';
+  }
+  if (value is String) {
+    return value.trim();
+  }
+  if (value is Map) {
+    if (!seen.add(value)) {
+      return '';
+    }
+    final map = value.cast<String, dynamic>();
+    for (final key in const <String>[
+      'output',
+      'summary',
+      'resultSummary',
+      'message',
+      'content',
+      'text',
+      'output_text',
+    ]) {
+      final extracted = _extractGoTaskTextCandidate(map[key], seen);
+      if (extracted.isNotEmpty) {
+        return extracted;
+      }
+    }
+    final choices = _castList(map['choices']);
+    if (choices.isNotEmpty) {
+      for (final choice in choices) {
+        final extracted = _extractGoTaskDisplayText(
+          _castMap(choice)['message'],
+          seen,
+        );
+        if (extracted.isNotEmpty) {
+          return extracted;
+        }
+      }
+    }
+    for (final key in const <String>[
+      'result',
+      'payload',
+      'data',
+      'response',
+      'body',
+    ]) {
+      final extracted = _extractGoTaskDisplayText(map[key], seen);
+      if (extracted.isNotEmpty) {
+        return extracted;
+      }
+    }
+    return '';
+  }
+  if (value is List) {
+    if (!seen.add(value)) {
+      return '';
+    }
+    final parts = <String>[];
+    for (final item in value) {
+      final extracted = _extractGoTaskDisplayText(item, seen);
+      if (extracted.isNotEmpty) {
+        parts.add(extracted);
+      }
+    }
+    return parts.join('\n').trim();
+  }
+  return '';
+}
+
+String _extractGoTaskTextCandidate(Object? value, Set<Object> visited) {
+  if (value == null) {
+    return '';
+  }
+  if (value is String) {
+    return value.trim();
+  }
+  if (value is List) {
+    return _extractGoTaskDisplayText(value, visited);
+  }
+  if (value is Map) {
+    final map = value.cast<String, dynamic>();
+    final type = map['type']?.toString().trim();
+    if (type == 'output_text') {
+      final text =
+          map['text']?.toString().trim() ?? map['value']?.toString().trim();
+      if (text != null && text.isNotEmpty) {
+        return text;
+      }
+    }
+    return _extractGoTaskDisplayText(map, visited);
+  }
+  return '';
+}
+
 Map<String, dynamic> mergeGoTaskServiceResponseResult(
   Map<String, dynamic> response,
   Map<String, dynamic> overlay,
@@ -818,3 +904,10 @@ List<Map<String, dynamic>> _castMapList(Object? raw) {
   }
   return raw.map(_castMap).toList(growable: false);
 }
+
+List<dynamic> _castList(Object? raw) {
+  if (raw is List) {
+    return raw;
+  }
+  return const <dynamic>[];
+}

test/runtime/gateway_acp_client_auth_test.dart

@@ -10,6 +10,64 @@ import 'package:xworkmate/runtime/runtime_models.dart';
 import 'package:xworkmate/runtime/secure_config_store.dart';
 
 void main() {
+  group('GoTaskService ACP response parsing', () {
+    test('uses direct bridge output text', () {
+      final result = goTaskServiceResultFromAcpResponse(<String, dynamic>{
+        'jsonrpc': '2.0',
+        'id': 'request-id',
+        'result': <String, dynamic>{
+          'success': true,
+          'output': 'direct response',
+        },
+      }, route: GoTaskServiceRoute.externalAcpSingle);
+
+      expect(result.success, isTrue);
+      expect(result.message, 'direct response');
+    });
+
+    test('uses nested provider result output text', () {
+      final result = goTaskServiceResultFromAcpResponse(<String, dynamic>{
+        'jsonrpc': '2.0',
+        'id': 'request-id',
+        'result': <String, dynamic>{
+          'success': true,
+          'result': <String, dynamic>{
+            'success': true,
+            'output': 'nested provider response',
+          },
+        },
+      }, route: GoTaskServiceRoute.externalAcpSingle);
+
+      expect(result.success, isTrue);
+      expect(result.message, 'nested provider response');
+    });
+
+    test('uses output content list text', () {
+      final result = goTaskServiceResultFromAcpResponse(<String, dynamic>{
+        'jsonrpc': '2.0',
+        'id': 'request-id',
+        'result': <String, dynamic>{
+          'success': true,
+          'payload': <String, dynamic>{
+            'output': <Map<String, dynamic>>[
+              <String, dynamic>{
+                'content': <Map<String, dynamic>>[
+                  <String, dynamic>{
+                    'type': 'output_text',
+                    'text': 'content list response',
+                  },
+                ],
+              },
+            ],
+          },
+        },
+      }, route: GoTaskServiceRoute.externalAcpSingle);
+
+      expect(result.success, isTrue);
+      expect(result.message, 'content list response');
+    });
+  });
+
   group('GatewayAcpClient authorization', () {
     test('normalizes raw resolver token into bearer header for HTTP', () async {
       final capture = await _startAcpHttpServer();