Add file analysis and answer feedback

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

@@ -3,6 +3,7 @@ import 'dart:typed_data';
 
 import 'package:http/http.dart' as http;
 import 'package:http_parser/http_parser.dart';
+import 'package:file_selector/file_selector.dart';
 import 'package:uuid/uuid.dart';
 
 import '../../features/chat/presentation/cubit/chat_state.dart';
@@ -110,6 +111,10 @@ class ApiRepository {
                       ? const []
                       : (versions.isEmpty ? [content] : versions),
               selectedVersion: message['selected_version'] as int? ?? 0,
+              feedbackVersions:
+                  (message['feedback_versions'] as List<dynamic>? ?? const [])
+                      .map((value) => value as int?)
+                      .toList(),
             );
           }).toList(),
     );
@@ -244,6 +249,61 @@ class ApiRepository {
     }
   }
 
+  Future<String> analyzeFiles(
+    List<XFile> files,
+    String question, {
+    String? model,
+  }) async {
+    final client = http.Client();
+    _activeRequestClient = client;
+    try {
+      final request = http.MultipartRequest(
+        'POST',
+        Uri.parse('$_baseUrl/v1/agent/files/analyze'),
+      )..fields['question'] = question;
+      if (model != null) request.fields['model'] = model;
+      for (final file in files) {
+        request.files.add(
+          http.MultipartFile.fromBytes(
+            'files',
+            await file.readAsBytes(),
+            filename: file.name,
+          ),
+        );
+      }
+      final streamed = await client
+          .send(request)
+          .timeout(const Duration(minutes: 10));
+      final response = await http.Response.fromStream(streamed);
+      _checkStatus(response);
+      final data = jsonDecode(response.body) as Map<String, dynamic>;
+      final result = data['result'] as String? ?? '';
+      final names = (data['files'] as List<dynamic>? ?? const []).cast<String>();
+      return names.isEmpty
+          ? result
+          : '$result\n\nالملفات التي حللتها: ${names.join('، ')}';
+    } finally {
+      if (identical(_activeRequestClient, client)) _activeRequestClient = null;
+      client.close();
+    }
+  }
+
+  Future<void> rateAnswer(
+    String conversationId,
+    int messageIndex,
+    int versionIndex,
+    int rating,
+  ) async {
+    final response = await http.put(
+      Uri.parse(
+        '$_baseUrl/v1/conversations/$conversationId/messages/$messageIndex/feedback',
+      ),
+      headers: await _userHeaders(),
+      body: jsonEncode({'version_index': versionIndex, 'rating': rating}),
+    );
+    _checkStatus(response);
+  }
+
   Stream<String> completeStream(
     List<ChatMessage> messages, {
     String? model,