Localize file operations and refine transfer notifications

tools/chatgui-android/app/src/main/java/com/utun/chat/data/MemberFilesRepository.kt

@@ -143,7 +143,7 @@ class MemberFilesRepository(context: Context) {
         _operation.value = operation
         // Уведомление обновляется по процентам; UI получает каждый прогресс без спама в логах.
         fun percent(op: FileOperation?) = if (op == null || op.total == 0L) -1 else (op.done.toDouble() * 100 / op.total).toInt()
-        if (previous?.name != operation.name || previous?.stage != operation.stage || previous?.active != operation.active ||
+        if (previous == null || previous.name != operation.name || previous.stage != operation.stage || previous.active != operation.active ||
             percent(previous) != percent(operation)) HeadlessService.refreshFiles()
     }