refactor: update data source and repository structure by removing unused files, enhancing model integration, and adjusting import paths for better organization

packages/chicken/lib/features/steward/buy/logic.dart

@@ -0,0 +1,36 @@
+import 'package:flutter/services.dart';
+import 'package:rasadyar_core/core.dart';
+
+class BuyLogic extends GetxController {
+  List<String> routesName = ['خرید'];
+  DateTime? _lastBackPressed;
+
+
+  @override
+  void onReady() {
+    fLog('BuyLogic onReady');
+    super.onReady();
+  }
+
+  @override
+  void onClose() {
+    // TODO: implement onClose
+    super.onClose();
+  }
+
+  void onPopScopTaped() async {
+    final now = DateTime.now();
+    if (_lastBackPressed == null || now.difference(_lastBackPressed!) > Duration(seconds: 2)) {
+      _lastBackPressed = now;
+      Get.snackbar(
+        'خروج از برنامه',
+        'برای خروج دوباره بازگشت را بزنید',
+        snackPosition: SnackPosition.TOP,
+        duration: Duration(seconds: 2),
+        backgroundColor: AppColor.warning,
+      );
+    } else {
+      await SystemNavigator.pop();
+    }
+  }
+}