Implement Phase 3 audio gaps: complex multi-stage one-shots (transporter, flak, breech, docking, tape spooler, teletype)

js/app.js

@@ -669,10 +669,12 @@ document.addEventListener('DOMContentLoaded', () => {
         expandedAudio.synthesizeHalChime();
         break;
       case 'ftl-jump':
-      case 'flak':
         expandedAudio.synthesizeFtlJump();
         visualizer.spawnWarpPulses();
         break;
+      case 'flak':
+        expandedAudio.synthesizeFlakBarrageBurst();
+        break;
       case 'singularity':
       case 'gravity':
       case 'rotation':
@@ -917,6 +919,23 @@ document.addEventListener('DOMContentLoaded', () => {
         expandedAudio.synthesizeCygnusPistonChug();
         break;
 
+      // Phase 3 (audio_gaps.md #48-#53)
+      case 'btn-transporter':
+        expandedAudio.synthesizeTransporterCycle();
+        break;
+      case 'btn-breech-clank':
+        expandedAudio.synthesizeBreechClank();
+        break;
+      case 'btn-dock-groan':
+        expandedAudio.synthesizeDockingGroan();
+        break;
+      case 'btn-tape-spooler':
+        expandedAudio.synthesizeTapeSpooler();
+        break;
+      case 'btn-teletype':
+        expandedAudio.synthesizeTeletypeChatterPhrase();
+        break;
+
       default:
         telemetry.synthesizeLCARSSingleChirp();
         break;