chore(nodes): set dimensions after mount

packages/vue-flow/src/components/Nodes/NodeWrapper.vue

@@ -69,6 +69,8 @@ watch(
 onBeforeUnmount(() => observer.stop())
 
 onMounted(() => {
+  updateNodeDimensions([{ id, nodeElement: nodeElement.value, forceUpdate: true }])
+
   watch(
     [
       () => node.position.x,

packages/vue-flow/src/container/Viewport/Transform.vue

@@ -27,7 +27,7 @@ onMounted(async () => {
   // hide graph until dimensions are ready, so we don't have jumping graphs (ssr for example)
   ready = true
 
-  fitViewOnInit && fitView()
+  fitViewOnInit?.value && fitView()
   emits.paneReady({
     id,
     nodes,