[bugfix] Prevent toolbar remount animation when clicking textarea widgets

When clicking on a textarea DOM widget, it was triggering a selection
update even if the node was already selected. This caused the toolbar
to unnecessarily re-animate.

The fix checks if the node is already selected before calling selectNode,
preventing redundant selection updates while maintaining proper selection
behavior for unselected nodes.

Fixes #4953

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/components/graph/widgets/DomWidget.vue

@@ -140,8 +140,13 @@ const setupDOMEventListeners = () => {
   for (const evt of widget.options.selectOn ?? ['focus', 'click']) {
     useEventListener(widget.element, evt, () => {
       const lgCanvas = canvasStore.canvas
-      lgCanvas?.selectNode(widget.node)
-      lgCanvas?.bringToFront(widget.node)
+      if (!lgCanvas) return
+
+      const node = widget.node
+      if (!node.is_selected) {
+        lgCanvas.selectItems([node])
+      }
+      lgCanvas.bringToFront(node)
     })
   }
 }