feat(sasch40): v4.0 full-screen mobile conversion, Hinter den Bergen room with Liars Dice, beat-only concert audio, and updated art

projects/sasch40/frontend/src/components/PartyExpressView.vue

@@ -136,6 +136,7 @@ function generateNoteChart() {
 
 function startConcert() {
   sound.playDialogueBlip()
+  sound.setBGMMode('beat_only')
   showConcertIntro.value = false
   notes = generateNoteChart()
   startTime = performance.now()
@@ -224,6 +225,7 @@ function spawnParticles(x: number, y: number, color: string, count = 8) {
 
 function finishConcert() {
   concertFinished.value = true
+  sound.setBGMMode('full')
   sound.playFanfare()
   store.serveGuest()
   store.serveGuest()
@@ -444,6 +446,7 @@ onMounted(() => {
 
 onUnmounted(() => {
   window.removeEventListener('keydown', handleKeyDown)
+  sound.setBGMMode('full')
   if (animId) cancelAnimationFrame(animId)
 })
 </script>