Simplified XR store setup

Refactored XRSession to remove marker bitmap preloading and lazy async store initialization. Replaced complex getXRStore flow with a single getOrCreateXRStore, removed manual bitmap handling, and updated AR start flow to use the centralized store. Simplified UX message on successful XR start.

X-Lovable-Edit-ID: edt-a8250c81-169f-4cc7-8370-4f5068a2c078

src/pages/XRSession.tsx

@@ -8,55 +8,15 @@ import { useModelStore } from '@/stores/useModelStore';
 import { toast } from 'sonner';
 import { ArrowLeft, Move, RotateCw, QrCode, Download, Crosshair } from 'lucide-react';
 import { Button } from '@/components/ui/button';
-import { generateTrackingMarker, generateMarkerDownloadURL } from '@/lib/trackingMarker';
+import { generateMarkerDownloadURL } from '@/lib/trackingMarker';
 
-// --- Marker bitmap singleton ---
-let markerBitmapPromise: Promise<ImageBitmap> | null = null;
-function getMarkerBitmap(): Promise<ImageBitmap> {
-  if (!markerBitmapPromise) {
-    markerBitmapPromise = generateTrackingMarker();
-  }
-  return markerBitmapPromise;
-}
-
-// --- XR Store singleton (lazy-initialized with marker) ---
+// --- XR Store singleton ---
 let xrStoreInstance: ReturnType<typeof createXRStore> | null = null;
 
-async function getXRStore() {
+function getOrCreateXRStore() {
   if (xrStoreInstance) return xrStoreInstance;
 
-  const bitmap = await getMarkerBitmap();
-
   // Only emulate when on localhost AND no native XR support
-  const shouldEmulate =
-    typeof window !== 'undefined' &&
-    window.location.hostname === 'localhost' &&
-    !navigator.xr;
-
-  xrStoreInstance = createXRStore({
-    emulate: shouldEmulate ? 'metaQuest3' : false,
-    hand: { left: true, right: true },
-    controller: { left: true, right: true },
-    customSessionInit: {
-      optionalFeatures: ['image-tracking'],
-      // @ts-ignore — trackedImages is a WebXR extension not yet in TS types
-      trackedImages: [
-        {
-          image: bitmap,
-          widthInMeters: 0.15, // 15cm printed marker
-        },
-      ],
-    },
-  });
-
-  return xrStoreInstance;
-}
-
-// Create a synchronous fallback store for initial render
-// (will be replaced once the async one is ready)
-function getInitialXRStore() {
-  if (xrStoreInstance) return xrStoreInstance;
-
   const shouldEmulate =
     typeof window !== 'undefined' &&
     window.location.hostname === 'localhost' &&
@@ -243,24 +203,17 @@ const XRSession = () => {
   const navigate = useNavigate();
   const { model, anchorMode, setAnchorMode } = useModelStore();
   const [inXR, setInXR] = useState(false);
-  const [store, setStore] = useState(() => getInitialXRStore());
+  const [store] = useState(() => getOrCreateXRStore());
 
-  // Pre-load marker and rebuild store with customSessionInit
   useEffect(() => {
     if (!model) {
       navigate('/');
-      return;
     }
-    getXRStore().then((s) => {
-      // Update store ref if it was replaced with the marker-enabled one
-      if (s !== store) setStore(s);
-    });
   }, [model, navigate]);
 
   const handleEnterAR = useCallback(async () => {
     try {
-      const s = await getXRStore();
-      const session = await s.enterAR();
+      const session = await store.enterAR();
       if (session) {
         session.addEventListener('end', () => {
           setInXR(false);
@@ -268,13 +221,13 @@ const XRSession = () => {
         });
         setInXR(true);
         setAnchorMode('manual');
-        toast.success('Sessão XR iniciada — Buscando QR Code…');
+        toast.success('Sessão XR iniciada!');
       }
     } catch (err: any) {
       console.error('XR error:', err);
       toast.error(`Falha ao iniciar XR: ${err.message}`);
     }
-  }, [setAnchorMode]);
+  }, [store, setAnchorMode]);
 
   const handleDownloadMarker = useCallback(async () => {
     const url = await generateMarkerDownloadURL();