destroy learning hub row editors

public/js/learningHub.js

@@ -117,7 +117,7 @@
 
     // Remove question block
     var rmQ = e.target.closest('.lh-rm-question');
-    if (rmQ) { var qb = rmQ.closest('.lh-question-block'); if (qb) qb.remove(); return; }
+    if (rmQ) { var qb = rmQ.closest('.lh-question-block'); if (qb) { destroyQuestionBlockEditors(qb); qb.remove(); } return; }
 
     // Add option to question
     var addOpt = e.target.closest('.lh-add-option');
@@ -129,7 +129,7 @@
 
     // Remove option
     var rmOpt = e.target.closest('.lh-rm-option');
-    if (rmOpt) { var row = rmOpt.closest('.lh-option-row'); if (row) row.remove(); return; }
+    if (rmOpt) { var row = rmOpt.closest('.lh-option-row'); if (row) { destroyOptionEditor(row); row.remove(); } return; }
   });
 
   // wireSearch() called after component is in DOM
@@ -876,7 +876,7 @@
       // Fill questions if any were generated alongside slides
       var qContainerP = document.getElementById('lh-cms-questions');
       if (qContainerP) {
-        qContainerP.innerHTML = '';
+        clearQuestionBlocks(qContainerP);
         if (content.questions && Array.isArray(content.questions)) {
           content.questions.forEach(function(q) { addQuestionBlock(q); });
         }
@@ -898,7 +898,7 @@
     // Replace questions
     var qContainer = document.getElementById('lh-cms-questions');
     if (qContainer) {
-      qContainer.innerHTML = '';
+      clearQuestionBlocks(qContainer);
       if (content.questions && Array.isArray(content.questions)) {
         content.questions.forEach(function(q) { addQuestionBlock(q); });
       }
@@ -1240,6 +1240,29 @@
     return (html === '<p></p>' || html === '') ? '' : html;
   }
 
+  function destroyTpEditor(editor) {
+    if (editor && typeof editor.destroy === 'function') editor.destroy();
+  }
+
+  function destroyOptionEditor(row) {
+    if (!row || !row._optEditor) return;
+    destroyTpEditor(row._optEditor);
+    row._optEditor = null;
+  }
+
+  function destroyQuestionBlockEditors(block) {
+    if (!block) return;
+    destroyTpEditor(block._questionEditor);
+    block._questionEditor = null;
+    block.querySelectorAll('.lh-option-row').forEach(destroyOptionEditor);
+  }
+
+  function clearQuestionBlocks(container) {
+    if (!container) return;
+    container.querySelectorAll('.lh-question-block').forEach(destroyQuestionBlockEditors);
+    container.innerHTML = '';
+  }
+
   // ── Body editor ────────────────────────────────────────────
   function initBodyEditor() {
     var wrap = document.getElementById('lh-body-editor');
@@ -1335,7 +1358,7 @@
     document.getElementById('lh-cms-edit-category').value = '';
     document.getElementById('lh-cms-edit-type').value = contentType || 'article';
     document.getElementById('lh-cms-edit-published').value = 'false';
-    document.getElementById('lh-cms-questions').innerHTML = '';
+    clearQuestionBlocks(document.getElementById('lh-cms-questions'));
     document.getElementById('btn-lh-delete-content').classList.add('hidden');
     hideDeleteConfirm();
     toggleEditorMode(contentType || 'article');
@@ -1375,7 +1398,7 @@
 
         // Load questions
         var qContainer = document.getElementById('lh-cms-questions');
-        qContainer.innerHTML = '';
+        clearQuestionBlocks(qContainer);
         if (c.questions && c.questions.length > 0) {
           c.questions.forEach(function(q) { addQuestionBlock(q); });
         }

test/learning-hub-editor.test.js

@@ -0,0 +1,16 @@
+const { test } = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+
+const source = fs.readFileSync(path.join(__dirname, '..', 'public', 'js', 'learningHub.js'), 'utf8');
+
+test('Learning Hub destroys embedded Tiptap editors before removing CMS rows', () => {
+  assert.match(source, /function destroyTpEditor\(editor\)/);
+  assert.match(source, /function destroyQuestionBlockEditors\(block\)/);
+  assert.match(source, /function clearQuestionBlocks\(container\)/);
+  assert.match(source, /destroyQuestionBlockEditors\(qb\); qb\.remove\(\)/);
+  assert.match(source, /destroyOptionEditor\(row\); row\.remove\(\)/);
+  assert.doesNotMatch(source, /document\.getElementById\('lh-cms-questions'\)\.innerHTML = ''/);
+  assert.doesNotMatch(source, /qContainer\.innerHTML = ''/);
+});