Simplify tags: free text only, no categories

Remove type system (ambiance/epoque/rythme/genre/theme).
Tags are now plain strings. Old format auto-migrated.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

public/index.html

@@ -1074,19 +1074,19 @@ function setupEditable(elId, section) {
 }
 
 // ── Tags ──
-const TAG_TYPES = ['ambiance', 'epoque', 'rythme', 'genre', 'theme'];
-
 function renderTags() {
   const container = document.getElementById('v-tags');
   const row = visionData['tags'];
   let tags = [];
   try { tags = JSON.parse(row?.Contenu || '[]'); } catch { tags = []; }
+  // Normalize: old format {label, type} → just strings
+  tags = tags.map(t => typeof t === 'string' ? t : t.label || '');
 
   container.innerHTML = '';
-  tags.forEach((t, i) => {
+  tags.forEach((label, i) => {
     const span = document.createElement('span');
-    span.className = `tag ${t.type || 'ambiance'}`;
+    span.className = 'tag ambiance';
-    span.innerHTML = `${esc(t.label)}<span class="tag-remove" onclick="removeTag(${i})">&times;</span>`;
+    span.innerHTML = `${esc(label)}<span class="tag-remove" onclick="removeTag(${i})">&times;</span>`;
     container.appendChild(span);
   });
 
@@ -1096,8 +1096,7 @@ function renderTags() {
   addBtn.onclick = () => {
     const label = prompt('Nouveau tag :');
     if (!label) return;
-    const type = prompt('Type (ambiance, epoque, rythme, genre, theme) :', 'genre') || 'genre';
+    tags.push(label);
-    tags.push({ label, type });
     saveVisionSection('tags', JSON.stringify(tags));
     renderTags();
   };
@@ -1108,6 +1107,7 @@ function removeTag(index) {
   const row = visionData['tags'];
   let tags = [];
   try { tags = JSON.parse(row?.Contenu || '[]'); } catch { return; }
+  tags = tags.map(t => typeof t === 'string' ? t : t.label || '');
   tags.splice(index, 1);
   saveVisionSection('tags', JSON.stringify(tags));
   renderTags();