design a custom built in wall unit featuring an integrated television concealed behind a sliding or pivoting panel the tv should remain completely hidden when not in use allowing the cabinetry to appear as a refined and cohesive library the composition should include open shelving for books and decorative objects with the television seamlessly integrated into the center section incorporate concealed storage cabinets along the entire lower portion of the unit providing practical storage while maintaining a clean and uncluttered appearance the design should be minimalist elegant and timeless crafted primarily in rich walnut wood with a natural matte finish introduce subtle rounded details on selected corners shelf edges and transitions between elements to soften the overall appearance and add sophistication focus on balanced proportions seamless joinery and a warm contemporary aesthetic the cabinetry should feel custom made high end and architectural with careful attention to materiality and craftsmanship photorealistic rendering luxury interior design soft ambient lighting premium walnut wood refined detailing architectural visualization quality
