feat: refactor code

lib/feature/game/domain/entities/game_entities.dart

@@ -0,0 +1,124 @@
+// موجودیت‌های وضعیت بازی (نگاشت از پیام‌های WebSocket سرور).
+
+class GamePlayer {
+  final int seat;
+  final String name;
+  final bool bot;
+  final bool connected;
+
+  GamePlayer.fromJson(Map<String, dynamic> j)
+      : seat = (j['seat'] ?? 0) as int,
+        name = (j['name'] ?? '') as String,
+        bot = (j['bot'] ?? false) as bool,
+        connected = (j['connected'] ?? false) as bool;
+}
+
+class TrickCard {
+  final int seat;
+  final String card;
+  TrickCard(this.seat, this.card);
+  factory TrickCard.fromJson(Map<String, dynamic> j) =>
+      TrickCard((j['seat'] ?? 0) as int, (j['card'] ?? '') as String);
+}
+
+/// نمای وضعیت بازی برای بازیکن جاری (پیام type=state).
+class GameState {
+  final String room;
+  final String phase; // choose_trump | playing | hand_over | game_over
+  final int yourSeat;
+  final int hakem;
+  final int turn;
+  final String? trump;
+  final bool trickDone;
+  final List<String> yourHand;
+  final List<int> handCounts;
+  final List<TrickCard> trick;
+  final String? leadSuit;
+  final List<int> tricksWon;
+  final List<int> scores;
+  final int targetScore;
+  final List<GamePlayer> players;
+
+  GameState({
+    required this.room,
+    required this.phase,
+    required this.yourSeat,
+    required this.hakem,
+    required this.turn,
+    required this.trump,
+    required this.trickDone,
+    required this.yourHand,
+    required this.handCounts,
+    required this.trick,
+    required this.leadSuit,
+    required this.tricksWon,
+    required this.scores,
+    required this.targetScore,
+    required this.players,
+  });
+
+  factory GameState.fromJson(Map<String, dynamic> j) {
+    List<int> ints(dynamic v) =>
+        ((v as List?) ?? []).map((e) => (e as num).toInt()).toList();
+    return GameState(
+      room: (j['room'] ?? '') as String,
+      phase: (j['phase'] ?? '') as String,
+      yourSeat: (j['your_seat'] ?? 0) as int,
+      hakem: (j['hakem'] ?? 0) as int,
+      turn: (j['turn'] ?? 0) as int,
+      trump: j['trump'] as String?,
+      trickDone: (j['trick_done'] ?? false) as bool,
+      yourHand:
+          ((j['your_hand'] as List?) ?? []).map((e) => e as String).toList(),
+      handCounts: ints(j['hand_counts']),
+      trick: ((j['trick'] as List?) ?? [])
+          .map((e) => TrickCard.fromJson(Map<String, dynamic>.from(e as Map)))
+          .toList(),
+      leadSuit: j['lead_suit'] as String?,
+      tricksWon: ints(j['tricks_won']),
+      scores: ints(j['scores']),
+      targetScore: (j['target_score'] ?? 7) as int,
+      players: ((j['players'] as List?) ?? [])
+          .map((e) => GamePlayer.fromJson(Map<String, dynamic>.from(e as Map)))
+          .toList(),
+    );
+  }
+
+  bool get isMyTurn => turn == yourSeat;
+  bool get amHakem => hakem == yourSeat;
+  GamePlayer? playerAt(int seat) =>
+      players.where((p) => p.seat == seat).cast<GamePlayer?>().firstOrNull;
+}
+
+/// نتیجه‌ی یک هَند (پیام type=hand_over).
+class HandResult {
+  final int winnerTeam;
+  final bool kot;
+  final bool hakemKot;
+  final int points;
+  final List<int> scores;
+  HandResult.fromJson(Map<String, dynamic> j)
+      : winnerTeam = (j['winner_team'] ?? 0) as int,
+        kot = (j['kot'] ?? false) as bool,
+        hakemKot = (j['hakem_kot'] ?? false) as bool,
+        points = (j['points'] ?? 0) as int,
+        scores =
+            ((j['scores'] as List?) ?? []).map((e) => (e as num).toInt()).toList();
+}
+
+/// نتیجه‌ی پایان بازی (پیام type=game_over).
+class GameOver {
+  final int winnerTeam;
+  final List<int> scores;
+  GameOver.fromJson(Map<String, dynamic> j)
+      : winnerTeam = (j['winner_team'] ?? 0) as int,
+        scores =
+            ((j['scores'] as List?) ?? []).map((e) => (e as num).toInt()).toList();
+}
+
+extension FirstOrNullExt<E> on Iterable<E> {
+  E? get firstOrNull {
+    final it = iterator;
+    return it.moveNext() ? it.current : null;
+  }
+}