bf4eee8595
Renderer improvements: - Configure shadow camera frustum to cover full house (was default -5..5) - Add geometry and material caching to reduce GPU allocations - Add proper disposal of Three.js objects on floor switch (fix memory leak) - Add error handling for fetch failures with custom event dispatch - Add room labels as sprites floating in each room - Support wall-mounted furniture Y positioning via position.y - Use cached highlight materials instead of mutating shared materials