Preview: apply ghost height, keep name labels world-scale above scaled ghosts

public/admin/preview.html

@@ -129,29 +129,34 @@ function buildStatics(scene) {
 // ---------- live ghosts ----------
 const active = new Map(); // uid -> { rec, group, label }
 let followUid = null;
+let ghostHeight = 4; // cm, from scene.ghostHeightCm
 const clockSamples = []; let clockOffset = 0;
 
 async function addGhost(rec) {
   if (active.has(rec.uid)) return;
   const group = await buildGhost(rec, gradients, modelManifest);
+  group.userData.setHeight(ghostHeight);
   const label = textSprite(rec.name, COLORS[rec.color] || '#fff');
-  label.position.y = 28;
-  group.add(label);
-  scn.add(group);
+  label.scale.set(20, 5, 1);
+  scn.add(group); scn.add(label);   // label stays world-scale, outside the scaled group
   active.set(rec.uid, { rec, group, label });
   renderList();
 }
 function removeGhost(uid) {
   const e = active.get(uid);
   if (!e) return;
-  scn.remove(e.group);
+  scn.remove(e.group); scn.remove(e.label);
   active.delete(uid);
   if (followUid === uid) followUid = null;
   renderList();
 }
 
 const net = new ExhibitNet();
-net.on('scene', m => buildStatics(m.scene))
+net.on('scene', m => {
+     buildStatics(m.scene);
+     ghostHeight = m.scene.ghostHeightCm || 4;
+     for (const e of active.values()) e.group.userData.setHeight(ghostHeight);
+   })
    .on('active', async m => {
      for (const uid of [...active.keys()]) removeGhost(uid);
      for (const rec of m.ghosts) await addGhost(rec);
@@ -208,12 +213,14 @@ fit();
 (function loop(t) {
   requestAnimationFrame(loop);
   const now = Date.now() + clockOffset;
-  for (const { rec, group } of active.values()) {
+  for (const { rec, group, label } of active.values()) {
     ghostTransform(rec, now, _tmp);
     group.position.copy(_tmp.position);
     group.rotation.y = _tmp.rotationY;
     group.userData.setOpacity(_tmp.opacity * 0.92);
     group.userData.tick(t / 1000);
+    label.position.set(_tmp.position.x, _tmp.position.y + ghostHeight + 3, _tmp.position.z);
+    label.material.opacity = _tmp.opacity;
   }
   if (followUid && active.has(followUid)) orbit.target.lerp(active.get(followUid).group.position, 0.08);
   orbit.update();