Feat/Fix: Adiciona histórico com exclusão para o Estúdio Musical e melhora prompt de voz (PT-BR infantil nativo)

server.js

@@ -220,11 +220,11 @@ app.post('/api/music/generate', requireAuth, async (req, res) => {
 
   try {
     // 1. Determinar o prompt de estilo baseado nos inputs
-    let voiceDesc = 'female vocals, clear and sweet singing voice';
+    let voiceDesc = 'young female vocals, singing in clear native brazilian portuguese accent, no european accent, sweet and warm voice';
     if (voz === 'homem') {
-      voiceDesc = 'male vocals, warm and gentle singing voice';
+      voiceDesc = 'male vocals, singing in clear native brazilian portuguese accent, warm and gentle singing voice';
     } else if (voz === 'crianca') {
-      voiceDesc = 'children vocals, sweet child singing voice';
+      voiceDesc = 'real young kid vocals, little child singing, boy or girl child voice, playful children voice, native brazilian portuguese kid accent, definitely no adult voices';
     }
 
     let rhythmDesc = 'happy acoustic children song, simple melody, acoustic guitar';
@@ -238,7 +238,7 @@ app.post('/api/music/generate', requireAuth, async (req, res) => {
       rhythmDesc = 'marching children rhythm, playful snare drums, acoustic guitar, brass accent';
     }
 
-    const stylePrompt = `${rhythmDesc}, ${voiceDesc}, educational children song style, singing in Brazilian Portuguese, Brazilian Portuguese vocals, clear Brazilian pronunciation, 100 BPM`;
+    const stylePrompt = `${rhythmDesc}, ${voiceDesc}, educational children song style, singing exclusively in native Brazilian Portuguese (PT-BR) accent, authentic Brazilian vocals, clear pronunciation`;
 
     // 2. Determinar o tamanho das letras baseado na duração (duracao)
     let lengthInstructions = 'curta, de apenas 6 a 8 versos';
@@ -306,9 +306,16 @@ Retorne APENAS a letra formatada em versos com quebras de linha. Não adicione n
     const audioUrl = `/generated-media/${fileName}`;
 
     // 6. Retornar dados para o frontend
+    const usuarioId = req.user?.id || '00000000-0000-0000-0000-000000000000';
+    const dbRes = await dbPool.query(
+      `INSERT INTO escola.estudio_musicas (usuario_id, voz, ritmo, tema, letra, audio_url) VALUES ($1, $2, $3, $4, $5, $6) RETURNING id`,
+      [usuarioId, voz, ritmo, tema, lyrics, audioUrl]
+    );
+
     res.json({
       success: true,
-         lyrics: lyrics,
+      id: dbRes.rows[0].id,
+      lyrics: lyrics,
       audioUrl: audioUrl
     });
 
@@ -318,6 +325,45 @@ Retorne APENAS a letra formatada em versos com quebras de linha. Não adicione n
   }
 });
 
+// ============================================================
+// ROTAS DE HISTÓRICO DO ESTÚDIO MUSICAL
+// ============================================================
+app.get('/api/music/list', requireAuth, async (req, res) => {
+  const usuarioId = req.user?.id || '00000000-0000-0000-0000-000000000000';
+  try {
+    const dbRes = await dbPool.query(`SELECT id, voz, ritmo, tema, created_at FROM escola.estudio_musicas WHERE usuario_id = $1 ORDER BY created_at DESC`, [usuarioId]);
+    res.json(dbRes.rows);
+  } catch (err) { res.status(500).json({ error: 'Erro ao listar histórico.' }); }
+});
+
+app.get('/api/music/:id', requireAuth, async (req, res) => {
+  const usuarioId = req.user?.id || '00000000-0000-0000-0000-000000000000';
+  try {
+    const dbRes = await dbPool.query(`SELECT * FROM escola.estudio_musicas WHERE id = $1 AND usuario_id = $2`, [req.params.id, usuarioId]);
+    if (dbRes.rows.length === 0) return res.status(404).json({ error: 'Não encontrada.' });
+    res.json(dbRes.rows[0]);
+  } catch (err) { res.status(500).json({ error: 'Erro ao buscar.' }); }
+});
+
+app.delete('/api/music/:id', requireAuth, async (req, res) => {
+  const usuarioId = req.user?.id || '00000000-0000-0000-0000-000000000000';
+  try {
+    // Apagar também o arquivo físico se quiser
+    const fileRes = await dbPool.query(`SELECT audio_url FROM escola.estudio_musicas WHERE id = $1 AND usuario_id = $2`, [req.params.id, usuarioId]);
+    if (fileRes.rows.length > 0 && fileRes.rows[0].audio_url) {
+      const fs = require('fs');
+      const path = require('path');
+      const filePath = path.join(__dirname, 'public', fileRes.rows[0].audio_url);
+      if (fs.existsSync(filePath)) {
+        fs.unlinkSync(filePath);
+      }
+    }
+
+    await dbPool.query(`DELETE FROM escola.estudio_musicas WHERE id = $1 AND usuario_id = $2`, [req.params.id, usuarioId]);
+    res.json({ success: true });
+  } catch (err) { res.status(500).json({ error: 'Erro ao deletar.' }); }
+});
+
 // ============================================================
 // ROTAS DO ESTÚDIO: FÁBRICA DE QUADRINHOS
 // ============================================================
@@ -1770,6 +1816,18 @@ async function initDatabase() {
         created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
       );
 
+      -- Estúdio Musical (Áudio MiniMax)
+      CREATE TABLE IF NOT EXISTS escola.estudio_musicas (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        usuario_id UUID NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000',
+        voz VARCHAR(50),
+        ritmo VARCHAR(100),
+        tema TEXT,
+        letra TEXT,
+        audio_url TEXT NOT NULL,
+        created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+      );
+
       -- Histórias (Inventando Histórias)
       CREATE TABLE IF NOT EXISTS escola.historias (
         id UUID PRIMARY KEY DEFAULT gen_random_uuid(),