instrumental introduction

src/screens/Library/MusicDetails.web.js

@@ -39,8 +39,10 @@ import { FONT_FAMILY } from "../../styles/Fonts";
 import Style, { gutters, size } from "../../styles/Style";
 import {
   formatStructureLabel,
+  getPromptLabelForStructure,
   getSegmentMeta,
   normalizeStructureType,
+  segmentRequiresLyrics,
 } from "../../utils/songStructure";
 
 // 20 secondes
@@ -333,12 +335,20 @@ const MusicDetails = ({ route }) => {
       const counts = {};
       return project.lyrics
         .map((s) => {
-          const body = (s?.lyrics || "").trim();
-          if (!body) return null;
           const type = normalizeStructureType(s?.type);
+          const requiresLyrics = segmentRequiresLyrics(type);
+          const body = (s?.lyrics || "").trim();
+          if (requiresLyrics && !body) return null;
           counts[type] = (counts[type] || 0) + 1;
           const label = formatStructureLabel(type, counts[type]);
-          return `[${label}]\n${body}`;
+          const displayLabel =
+            typeof label === "string" && label.length > 0
+              ? label
+              : getPromptLabelForStructure(type);
+          if (!requiresLyrics) {
+            return `[${displayLabel}] — section instrumentale`;
+          }
+          return `[${displayLabel}]\n${body}`;
         })
         .filter(Boolean)
         .join("\n\n");
@@ -404,8 +414,11 @@ const MusicDetails = ({ route }) => {
     const normalized = normalizeStructureType(type);
     const meta = getSegmentMeta(normalized);
     if (meta) {
-      return formatStructureLabel(normalized, index);
+      const label = formatStructureLabel(normalized, index);
+      if (label) return label;
     }
+    const prompt = getPromptLabelForStructure(normalized);
+    if (prompt) return prompt;
     if (normalized === "refrain")
       return index > 1 ? `Refrain ${index}` : "Refrain";
     if (normalized === "couplet")