Modify SerializedGameInfo

* Add lastPlayed
* Make playtime optional for PSN
* Make id string, number or null for PSN

src/lib/types/steam.ts

@@ -1,6 +1,7 @@
 type SerializableGameInfo = {
-	id: number
+	id: number | string | null
 	name: string
-	playtime: number
+	playtime: number | undefined
+	lastPlayed: Date | undefined
 	coverURL: string
 }

src/routes/api/steam/+server.ts

@@ -17,6 +17,7 @@ export const GET: RequestHandler = async ({ params }) => {
 			id: game.game.id,
 			name: game.game.name,
 			playtime: game.minutes,
+			lastPlayed: game.lastPlayedAt,
 			coverURL: game.game.coverURL
 		}))