[improve] set game dir on client -> updates Play/Install button based on games existing

crates/lanspread-server/src/main.rs

@@ -116,6 +116,7 @@ impl RequestHandler {
 
     async fn handle_request(&self, request: Request) -> Response {
         match request {
+            Request::Ping => Response::Pong,
             Request::ListGames => {
                 let db = self.db.lock().await;
                 Response::Games(db.all_games().into_iter().cloned().collect())
@@ -172,6 +173,7 @@ fn eti_game_to_game(eti_game: EtiGame) -> Game {
         genre: eti_game.genre_de,
         size: (eti_game.game_size * 1024.0 * 1024.0 * 1024.0) as u64,
         thumbnail: None,
+        installed: false,
     }
 }