squash a bunch of commits

Shogi.UI/Pages/Home/GamePiece.razor

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+@using Shogi.Contracts.Types
+
+<div data-upsidedown="@(Piece?.Owner != Perspective)" data-owner="@Piece?.Owner.ToString()">
+	@switch (Piece?.WhichPiece)
+	{
+		case WhichPiece.Bishop:
+			<Bishop IsPromoted="@IsPromoted" />
+			break;
+		case WhichPiece.GoldGeneral:
+			<GoldGeneral />
+			break;
+		case WhichPiece.King:
+			<ChallengingKing />
+			break;
+		case WhichPiece.Knight:
+			<Knight IsPromoted="@IsPromoted" />
+			break;
+		case WhichPiece.Lance:
+			<Lance IsPromoted="@IsPromoted" />
+			break;
+		case WhichPiece.Pawn:
+			<Pawn IsPromoted="@IsPromoted" />
+			break;
+		case WhichPiece.Rook:
+			<Rook IsPromoted="@IsPromoted" />
+			break;
+		case WhichPiece.SilverGeneral:
+			<SilverGeneral IsPromoted="@IsPromoted" />
+			break;
+		default:
+			@*render nothing*@
+			break;
+	}
+</div>
+
+@code {
+	[Parameter]
+	public Contracts.Types.Piece? Piece { get; set; }
+
+	[Parameter]
+	public WhichPlayer Perspective { get; set; }
+
+	private bool IsPromoted => Piece != null && Piece.IsPromoted;
+}