fix(ui): prevent inline toolbar from hiding when interacting with submenus

- keep toolbar visible when focus moves to an element inside `[data-inline-toolbar]`
- unpin toolbar on cleanup when submenu closes to avoid stale pinned state

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

@@ -579,6 +579,10 @@ export default function BlockEditor({
     // passe sur l'input/bouton et la sélection peut paraître hors-bloc :
     // on garde la toolbar visible.
     if (toolbarPinnedRef.current) return;
+    if (typeof document !== 'undefined') {
+      const active = document.activeElement;
+      if (active instanceof Element && active.closest('[data-inline-toolbar]')) return;
+    }
     const sel = typeof window !== 'undefined' ? window.getSelection() : null;
     if (!sel || sel.rangeCount === 0 || sel.isCollapsed) {
       setToolbar(null);

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

@@ -47,6 +47,7 @@ export default function InlineToolbar({ rect, activeMarks, onToggleMark, onSetMa
 
   useEffect(() => {
     onPinChange?.(openSubmenu !== null);
+    return () => { onPinChange?.(false); };
   }, [openSubmenu, onPinChange]);
 
   useLayoutEffect(() => {