Add WebSocket client for spirit data in public/app.js

node/server/public/app.js

@@ -0,0 +1,12 @@
+// Im Client (public/app.js)
+const ws = new WebSocket(`ws://${location.host}`);
+
+ws.addEventListener('message', async (event) => {
+  const msg = JSON.parse(event.data);
+  if (msg.type === 'spirit') {
+    const spirit = msg.data;
+    // Lade spirit.modelUrl (GLTF), spirit.name, spirit.desc etc.
+    // (Dein Rendercode wie bisher, nur Spirit-Daten dynamisch)
+    showSpirit(spirit);
+  }
+});