Lobby: include HostUserId in GameStateDto and let client derive host status; update tests

SlipItIn.Server.Tests/GameHubTests.cs

@@ -108,6 +108,7 @@ public class GameHubTests
         {
             GameId = game.Id,
             LobbyCode = game.LobbyCode,
+            HostUserId = game.HostId,
             Players = [new PlayerInfoDto { Username = user.Username }]
         });
 
@@ -151,7 +152,7 @@ public class GameHubTests
 
         var game = new Game { Id = 3, LobbyCode = "JOIN42", HostId = 99 };
         _gameService.Setup(s => s.JoinGameAsync("JOIN42", user.Id, ConnectionId)).ReturnsAsync(game);
-        _gameService.Setup(s => s.GetGameStateAsync(game.Id)).ReturnsAsync(new GameStateDto { GameId = 3 });
+        _gameService.Setup(s => s.GetGameStateAsync(game.Id)).ReturnsAsync(new GameStateDto { GameId = 3, HostUserId = 99 });
 
         await _hub.JoinLobby("JOIN42");
 
@@ -205,7 +206,7 @@ public class GameHubTests
 
         _gameService.Setup(s => s.SetPlayerReadyAsync(game.Id, player.Id))
             .ReturnsAsync(new Game { Id = game.Id, LobbyCode = game.LobbyCode });
-        _gameService.Setup(s => s.GetGameStateAsync(game.Id)).ReturnsAsync(new GameStateDto { GameId = game.Id });
+        _gameService.Setup(s => s.GetGameStateAsync(game.Id)).ReturnsAsync(new GameStateDto { GameId = game.Id, HostUserId = game.HostId });
 
         await _hub.PlayerReady(game.Id, player.Id);
 
@@ -540,7 +541,9 @@ public class GameHubTests
         SeedGameWithPlayers((user, ConnectionId));
         var gameId = db.Games.Single().Id;
 
-        _gameService.Setup(s => s.GetGameStateAsync(gameId)).ReturnsAsync(new GameStateDto { GameId = gameId });
+        var hostId = db.Games.Single().HostId;
+
+        _gameService.Setup(s => s.GetGameStateAsync(gameId)).ReturnsAsync(new GameStateDto { GameId = gameId, HostUserId = hostId });
 
         await _hub.RequestGameState(gameId);