feat: add Robot Doctor and Security Guard personas with pricing and model paths

src/components/RobotModel.tsx

@@ -22,7 +22,7 @@ function buildAttireGlbMap(personas: { id: string; modelPath?: string }[]): Reco
   personas.forEach((p) => {
     if (p.modelPath && p.id !== 'none') dynamic[p.id] = p.modelPath;
   });
-  return { ...dynamic, ...STATIC_ATTIRE_GLB }; // static takes priority
+  return { ...STATIC_ATTIRE_GLB, ...dynamic }; // uploaded GLBs override static
 }
 
 function easeInOutCubic(t: number): number {
@@ -32,6 +32,15 @@ function easeInOutCubic(t: number): number {
 }
 
 function AttireModel({ glbPath, onLoaded }: { glbPath: string; onLoaded: () => void }) {
+  // Clear stale useGLTF cache entries for paths that share the same base filename
+  // (e.g. /models/robot-doctor.glb?v=1 replaced by ?v=2). This prevents Three.js
+  // from serving the old binary when the version query string changes.
+  useEffect(() => {
+    return () => {
+      useGLTF.clear(glbPath);
+    };
+  }, [glbPath]);
+
   const { scene } = useGLTF(glbPath);
 
   const processedAttire = useMemo(() => {