feat(ui): add "open in new tab" option to block editor link toolbar

- add `linkNewTab` state (default true) in InlineToolbar
- pass `newTab` flag through `onToggleMark` on link submit and remove
- restore `newTab` value when reopening the link popover
- add checkbox ui in link popover to toggle new tab behavior
- update link serialization to render `target="_blank" rel="noopener noreferrer"` when `newTab` is set
- add `newTab` field to link mark type definition

src/shared/components/BlockEditor/inline/Toolbar.client.js

@@ -27,6 +27,7 @@ export default function InlineToolbar({ rect, activeMarks, onToggleMark, onPinCh
   const [pos, setPos] = useState({ top: 0, left: 0, flipped: false });
   const [popover, setPopover] = useState(null); // 'color' | 'highlight' | 'link' | null
   const [linkUrl, setLinkUrl] = useState('');
+  const [linkNewTab, setLinkNewTab] = useState(true);
 
   useEffect(() => {
     onPinChange?.(popover !== null);
@@ -75,21 +76,22 @@ export default function InlineToolbar({ rect, activeMarks, onToggleMark, onPinCh
   function handleLinkSubmit(e) {
     e.preventDefault();
     if (!linkUrl) return;
-    onToggleMark?.({ type: 'link', href: linkUrl });
+    onToggleMark?.({ type: 'link', href: linkUrl, newTab: linkNewTab });
     setLinkUrl('');
     setPopover(null);
   }
 
   function handleLinkRemove() {
-    // Trouver le href actif pour reproduire la même mark (toggle off).
+    // Trouver la mark active pour reproduire la même clé (toggle off).
     const link = activeMarks.find(m => m.type === 'link');
-    if (link) onToggleMark?.({ type: 'link', href: link.href });
+    if (link) onToggleMark?.({ type: 'link', href: link.href, ...(link.newTab ? { newTab: true } : {}) });
     setPopover(null);
   }
 
   function openLinkPopover() {
     const link = activeMarks.find(m => m.type === 'link');
     setLinkUrl(link?.href ?? '');
+    setLinkNewTab(link ? !!link.newTab : true);
     setPopover(p => (p === 'link' ? null : 'link'));
   }
 
@@ -157,8 +159,9 @@ export default function InlineToolbar({ rect, activeMarks, onToggleMark, onPinCh
       {popover === 'link' && (
         <form
           onSubmit={handleLinkSubmit}
-          className="absolute top-full left-0 mt-1 flex items-center gap-1 rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 shadow-md px-2 py-1.5"
+          className="absolute top-full left-0 mt-1 flex flex-col gap-1.5 rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 shadow-md px-2 py-1.5"
         >
+          <div className="flex items-center gap-1">
             <input
               autoFocus
               type="url"
@@ -183,6 +186,16 @@ export default function InlineToolbar({ rect, activeMarks, onToggleMark, onPinCh
                 ✕
               </button>
             )}
+          </div>
+          <label className="flex items-center gap-2 text-xs text-neutral-700 dark:text-neutral-300 select-none cursor-pointer">
+            <input
+              type="checkbox"
+              checked={linkNewTab}
+              onChange={(e) => setLinkNewTab(e.target.checked)}
+              className="cursor-pointer"
+            />
+            Ouvrir dans un nouvel onglet
+          </label>
         </form>
       )}
     </div>

src/shared/components/BlockEditor/inline/serialize.js

@@ -14,14 +14,6 @@
 
 import { INLINE_COLORS, normalize } from './types.js';
 
-const SIMPLE_TAGS = {
-  bold: 'STRONG',
-  italic: 'EM',
-  underline: 'U',
-  strike: 'S',
-  code: 'CODE',
-};
-
 const TAG_TO_MARK = {
   STRONG: 'bold',
   B: 'bold',
@@ -87,13 +79,14 @@ function buildNode(d, node) {
   // 4. Lien — toujours à l'extérieur.
   const link = findMark(marks, 'link');
   if (link) {
+    const attrs = { href: link.href };
+    if (link.newTab) {
+      attrs.target = '_blank';
+      attrs.rel = 'noopener noreferrer';
+    }
     el = wrap(d, el, 'a', {
       className: 'text-blue-600 dark:text-blue-400 underline underline-offset-2',
-      attrs: {
-        href: link.href,
-        rel: 'noopener noreferrer',
-        target: '_blank',
-      },
+      attrs,
     });
   }
 
@@ -149,7 +142,10 @@ function walk(node, marks, out) {
 
   if (tag === 'A') {
     const href = node.getAttribute('href') || '';
-    if (href) added.push({ type: 'link', href });
+    if (href) {
+      const newTab = node.getAttribute('target') === '_blank';
+      added.push({ type: 'link', href, ...(newTab ? { newTab: true } : {}) });
+    }
   }
 
   if (tag === 'SPAN') {

src/shared/components/BlockEditor/inline/types.js

@@ -48,7 +48,7 @@ export function markKey(mark) {
     case 'highlight':
       return `${mark.type}:${mark.color}`;
     case 'link':
-      return `link:${mark.href}`;
+      return `link:${mark.newTab ? '1' : '0'}:${mark.href}`;
     default:
       return mark.type;
   }