Audio update

src/states/MenuState.cpp

@@ -8,6 +8,7 @@
 #include "../core/Settings.h"
 #include "../core/state/StateManager.h"
 #include "../audio/Audio.h"
+#include "../audio/AudioManager.h"
 #include "../audio/SoundEffect.h"
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_render.h>
@@ -180,7 +181,7 @@ void MenuState::showCoopSetupPanel(bool show, bool resumeMusic) {
             coopSetupStep = CoopSetupStep::ChoosePartner;
             // Resume menu music only when requested (ESC should pass resumeMusic=false)
             if (resumeMusic && ctx.musicEnabled && *ctx.musicEnabled) {
-                Audio::instance().playMenuMusic();
+                if (auto sys = ::AudioManager::get()) sys->playMenuMusic();
             }
         }
     }