chat support update

lib/services/chat_service.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:dio/dio.dart';
 import '../config/api_config.dart';
 
@@ -38,4 +40,25 @@ class ChatService {
 
     await dio.post('/user/chat/send/$ticketId', data: form);
   }
+
+  // ---------------------------
+  // SEND FILE (image/video/pdf/excel)
+  // ---------------------------
+  Future<void> sendFile(int ticketId, File file) async {
+    final formData = FormData.fromMap({
+      'file': await MultipartFile.fromFile(
+        file.path,
+        filename: file.path.split('/').last,
+      ),
+    });
+
+    await dio.post(
+      "/user/chat/send/$ticketId",
+
+      data: formData,
+      options: Options(
+        headers: {'Content-Type': 'multipart/form-data'},
+      ),
+    );
+  }
 }