feat: Geração de música cantada com melodia e instrumentos pelo MiniMax music-2.0 e barra de progresso animada em roxo vibrante no player

public/app.js

@@ -7591,7 +7591,20 @@ window.toggleCustomAudio = (btn) => {
     });
   }
 
-  // Equalizer / Waveform Animation quando toca
+  // Formatação de Tempo (mm:ss)
+  const formatAudioTime = (sec) => {
+    if (!sec || isNaN(sec)) return '0:00';
+    const m = Math.floor(sec / 60);
+    const s = Math.floor(sec % 60);
+    return `${m}:${s < 10 ? '0' : ''}${s}`;
+  };
+
+  // Equalizer / Waveform & Barra de Progresso Roxo Vibrante
+  const musicaCustomProgressContainer = document.getElementById('musicaCustomProgressContainer');
+  const musicaCustomProgressBar = document.getElementById('musicaCustomProgressBar');
+  const musicaCurrentTime = document.getElementById('musicaCurrentTime');
+  const musicaDurationTime = document.getElementById('musicaDurationTime');
+
   if (musicaAudioPlayer) {
     musicaAudioPlayer.addEventListener('play', () => {
       const bars = document.querySelectorAll('#musicaWaveformVisualizer .wave-bar');
@@ -7601,6 +7614,30 @@ window.toggleCustomAudio = (btn) => {
       const bars = document.querySelectorAll('#musicaWaveformVisualizer .wave-bar');
       bars.forEach(b => b.classList.remove('wave-active'));
     });
+    musicaAudioPlayer.addEventListener('timeupdate', () => {
+      const cur = musicaAudioPlayer.currentTime || 0;
+      const dur = musicaAudioPlayer.duration || 0;
+      if (musicaCurrentTime) musicaCurrentTime.textContent = formatAudioTime(cur);
+      if (musicaDurationTime && dur) musicaDurationTime.textContent = formatAudioTime(dur);
+      if (musicaCustomProgressBar && dur > 0) {
+        const pct = Math.min(100, Math.max(0, (cur / dur) * 100));
+        musicaCustomProgressBar.style.width = `${pct}%`;
+      }
+    });
+    musicaAudioPlayer.addEventListener('loadedmetadata', () => {
+      const dur = musicaAudioPlayer.duration || 0;
+      if (musicaDurationTime) musicaDurationTime.textContent = formatAudioTime(dur);
+    });
+
+    if (musicaCustomProgressContainer) {
+      musicaCustomProgressContainer.addEventListener('click', (e) => {
+        const rect = musicaCustomProgressContainer.getBoundingClientRect();
+        const clickPos = (e.clientX - rect.left) / rect.width;
+        if (musicaAudioPlayer.duration) {
+          musicaAudioPlayer.currentTime = clickPos * musicaAudioPlayer.duration;
+        }
+      });
+    }
   }
 
   // --- GERAR MÚSICA (COMPOR 3 VERSÕES + ÁUDIO) ---