fix: checkbox vide casse la liste + raccourci Alt+\ pour autocomplete

- Enter sur '- [ ]' sans texte: casse la liste (supprime la ligne vide)
- Raccourci: Alt+/ → Alt+\ (n'entre pas en conflit avec le slash menu)
- Aide F1, barre statut, console mis a jour

frontend/editor-poc.html

@@ -393,7 +393,7 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
 <!-- Status bar -->
 <div class="stat">
   <div class="stat-left">
-    <span>Type <strong>/</strong> for commands  |  <strong>Alt+/</strong> autocomplete  |  <strong>Alt+I</strong> Insert</span>
+    <span>Type <strong>/</strong> for commands  |  <strong>Alt+\</strong> autocomplete  |  <strong>Alt+I</strong> Insert</span>
     <span>Ctrl+J AI panel</span>
     <span>Ctrl+S save</span>
     <span>Ctrl+K link</span>
@@ -442,7 +442,7 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
       <tr><td>Ctrl+S</td><td>Sauvegarder</td></tr>
       <tr><td>Clic sur le titre</td><td>Renommer le fichier</td></tr>
       <tr><td>Ctrl+J</td><td>Panneau AI</td></tr>
-      <tr><td>Alt+/</td><td>Autocompletion intelligente</td></tr>
+      <tr><td>Alt+\</td><td>Autocompletion intelligente</td></tr>
       <tr><td>Enter (liste)</td><td>Continue la liste (-, *, 1.) et checkboxes</td></tr>
       <tr><td>Enter (liste vide)</td><td>Termine la liste</td></tr>
     </table>
@@ -1786,8 +1786,8 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
       else if (e.key === 'Escape') { e.preventDefault(); hideAutocomplete(); }
       return;
     }
-    // Alt+/ : force autocomplete
+    // Alt+\ : force autocomplete
-    if (e.altKey && !e.ctrlKey && !e.metaKey && e.key === '/') {
+    if (e.altKey && !e.ctrlKey && !e.metaKey && e.key === '\\') {
       e.preventDefault();
       triggerAutocomplete();
       return;
@@ -1811,11 +1811,18 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
       var taskMatch = currentLine.match(/^(\s*)([-*+])\s+\[([ xX])\]\s/);
 
       if (taskMatch) {
-        // Continue checkbox (empty, unchecked)
+        var afterTaskTrim = currentLine.slice(taskMatch[0].length).trim();
-        e.preventDefault();
+        if (afterTaskTrim.length === 0) {
-        var newNumber = '';
+          // Empty checkbox: break list (remove this line)
-        ta.value = before + '\n' + indent + taskMatch[2] + ' [ ] ';
+          e.preventDefault();
-        ta.setSelectionRange(ta.value.length, ta.value.length);
+          ta.value = before.slice(0, lineStart) + after;
+          ta.setSelectionRange(lineStart, lineStart);
+        } else {
+          // Continue checkbox (empty, unchecked)
+          e.preventDefault();
+          ta.value = before + '\n' + indent + taskMatch[2] + ' [ ] ';
+          ta.setSelectionRange(ta.value.length, ta.value.length);
+        }
         markDirty(); autoHeight(); updateLineNumbers();
         return;
       } else if (olMatch) {
@@ -1861,7 +1868,7 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
   console.log('ObsiGate Editor v2 ready');
   console.log('  File: ' + (fileVault ? fileVault + '/' + filePath : 'demo mode'));
   console.log('  AI: checking...');
-  console.log('  Type / for commands | Select text for bubble | Alt+/ autocomplete | Ctrl+J AI | Ctrl+S save');
+  console.log('  Type / for commands | Select text for bubble | Alt+\\ autocomplete | Ctrl+J AI | Ctrl+S save');
 
 })();
 </script>