Merge remote main: upside-down influence lamps with local hall fixes.

Keep remote lamp orientation, drop castShadow (shadows stay disabled), and retain curator-note plates plus large-hall loading docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/components/VirtualGallery.tsx

@@ -676,7 +676,7 @@ function InfluencePictureLamp({
   const scale = 1.35;
 
   return (
-    <group position={[0, mountY, frameDepth * 0.55]} scale={scale}>
+    <group position={[0, mountY, frameDepth * 0.55]} rotation={[Math.PI, 0, 0]} scale={scale}>
       <mesh position={[0, 0.04, -0.05]} renderOrder={30}>
         <boxGeometry args={[0.11, 0.05, 0.05]} />
         <meshStandardMaterial color="#2f2f2f" metalness={0.9} roughness={0.2} />