fix: remove splash screen from 3D facility viewer

The 3D viewer now loads directly into the scene without the Feature3D intro overlay

frontend/src/pages/Facility3DViewerPage.tsx

@@ -82,7 +82,6 @@ class ErrorBoundary extends Component<{ children: ReactNode }, ErrorBoundaryStat
 
 // --- Main Component ---
 export default function Facility3DViewerPage() {
-    const [showIntro, setShowIntro] = useState(true);
     const [status, setStatus] = useState('Initializing...');
     const [floorData, setFloorData] = useState<Floor3DData | null>(null);
     const [selectedPlant, setSelectedPlant] = useState<PlantPosition | null>(null);
@@ -112,12 +111,7 @@ export default function Facility3DViewerPage() {
     const [searchParams] = useSearchParams();
     const targetedPlantTag = searchParams.get('plant');
 
-    useEffect(() => {
-        // If coming from deep link, skip intro
-        if (targetedPlantTag) {
-            setShowIntro(false);
-        }
-    }, [targetedPlantTag]);
+
 
     useEffect(() => {
         loadData();
@@ -304,12 +298,6 @@ export default function Facility3DViewerPage() {
 
     return (
         <div className="h-screen w-full relative bg-slate-950 text-white overflow-hidden font-sans">
-            {/* Intro Overlay */}
-            {showIntro && (
-                <div className="absolute inset-0 z-50 bg-slate-950 overflow-y-auto">
-                    <Feature3D onEnter={() => setShowIntro(false)} />
-                </div>
-            )}
             {/* Header */}
             <div className="absolute top-0 left-0 right-0 p-3 md:p-4 z-10 flex flex-wrap items-center justify-between bg-gradient-to-b from-black/90 to-transparent pointer-events-none gap-2">
                 <div className="pointer-events-auto flex items-center gap-3">