Feat: Add button click sounds to Lobby UI

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/lobbyui/Casinomainui.java

@@ -1,6 +1,7 @@
 package ch.unibas.dmi.dbis.cs108.casono.client.ui.lobbyui;
 
 /** Main UI application for Casono. Loads the main FXML layout and sets up the stage. */
+import ch.unibas.dmi.dbis.cs108.casono.ui.sound.SoundManager;
 import java.io.IOException;
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
@@ -30,6 +31,9 @@ public class Casinomainui extends Application {
      * @throws IOException If loading the FXML fails.
      */
     public void start(Stage stage) throws IOException {
+        // Pre-load sounds to avoid delays on first play
+        SoundManager.getInstance().preloadSounds();
+
         // If the launcher passed an address argument (ip:port), expose it as
         // system properties so controllers can read it without embedding defaults.
         var raw = getParameters().getRaw();

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/lobbyui/CasinomainuiController.java

@@ -5,6 +5,7 @@ import ch.unibas.dmi.dbis.cs108.casono.client.chat.ChatController;
 import ch.unibas.dmi.dbis.cs108.casono.client.network.ClientService;
 import ch.unibas.dmi.dbis.cs108.casono.client.network.LobbyClient;
 import ch.unibas.dmi.dbis.cs108.casono.client.ui.gameui.gameuicomponents.HighscoreViewController;
+import ch.unibas.dmi.dbis.cs108.casono.ui.sound.SoundManager;
 import java.io.IOException;
 import java.net.URL;
 import javafx.application.Platform;
@@ -169,6 +170,7 @@ public class CasinomainuiController {
     /** Handles the login button action. Validates input and calls LobbyClient.login(). */
     @FXML
     public void handleLoginButton() {
+        SoundManager.getInstance().playButtonClick();
         String username = usernameField == null ? null : usernameField.getText();
         if (username == null || username.isBlank()) {
             showAlert("Please enter a username.");
@@ -258,6 +260,7 @@ public class CasinomainuiController {
     /** Handles the exit button action to close the application. */
     @FXML
     public void handleexitbutton() {
+        SoundManager.getInstance().playButtonClick();
         if (chatController != null) {
             chatController.shutdown();
         }
@@ -271,6 +274,7 @@ public class CasinomainuiController {
      */
     @FXML
     public void handleCreateLobbyButton() {
+        SoundManager.getInstance().playButtonClick();
         if (translationManager.isFull()) {
             LOGGER.warn("Grid is full! No more lobbies available.");
             return;

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/lobbyui/LobbyButtonGridManager.java

@@ -6,6 +6,7 @@ import ch.unibas.dmi.dbis.cs108.casono.client.network.ClientService;
 import ch.unibas.dmi.dbis.cs108.casono.client.network.LobbyClient;
 import ch.unibas.dmi.dbis.cs108.casono.client.ui.gameui.CasinoGameUI;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.command.parsing.RequestParameter;
+import ch.unibas.dmi.dbis.cs108.casono.ui.sound.SoundManager;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -363,6 +364,7 @@ public class LobbyButtonGridManager {
 
         btn.setOnAction(
                 e -> {
+                    SoundManager.getInstance().playButtonClick();
                     Integer targetLobbyId = translationManager.getLobbyIdForButton(buttonId);
 
                     if (targetLobbyId != null) {