feat: UI update

lib/ui/party_room/utils/party_room_utils.dart

@@ -0,0 +1,22 @@
+import 'package:fixnum/fixnum.dart';
+import 'package:intl/intl.dart';
+
+class PartyRoomUtils {
+  static final DateFormat dateTimeFormatter = DateFormat('yyyy-MM-dd HH:mm:ss');
+
+  /// rpc Int64 时间戳 转 DateTime
+  static DateTime? getDateTime(Int64? timestamp) {
+    if (timestamp == null || timestamp == Int64.ZERO) {
+      return null;
+    }
+    return DateTime.fromMillisecondsSinceEpoch(timestamp.toInt() * 1000);
+  }
+
+  static String? formatDateTime(Int64? timestamp) {
+    final dateTime = getDateTime(timestamp);
+    if (dateTime == null) {
+      return null;
+    }
+    return dateTimeFormatter.format(dateTime);
+  }
+}