disable save buttons if not pgn is loaded

.env.development

@@ -1,4 +0,0 @@
-DISCORD_CONTACT_WEBHOOK="https://discord.com/api/webhooks/1166012977313497248/bDOfla0XnRgkBfDJYeRKs_QNe8P_S2kzXokuZNsLGfZN1mvfQAecYJlIrOC0qfMTOEpl"
-DISCORD_ERROR_LOG_WEBHOOK="https://discord.com/api/webhooks/1174005798200938618/lLgOihkU9MlYwW2slPOTIK3q1kX80f04BSQbimdhHGFgOrN6zC5s2MlmtlSk8K6POZcJ"
-LICHESS_CLIENT_ID="chess-scribe.org"
-WEBSITE_URL="http://localhost:3000"

src/pages/Chessboard.tsx

@@ -49,6 +49,7 @@ const Chessboard = ({
 					className="cursor-pointer"
 					type="button"
 					onClick={handleSavePgn}
+					disabled={!gameState.pgn}
 				>
 					Save PGN
 				</button>
@@ -57,6 +58,7 @@ const Chessboard = ({
 					className="cursor-pointer"
 					type="button"
 					onClick={handleSavePdf}
+					disabled={!gameState.pgn}
 				>
 					Save PDF
 				</button>