GPT-5.4 continued the L1 UX/copy simplification sweep across Quiet Rooms, now covering six additional pages: start, save-one, the main room pages, hallway, and warmer-experiments all received simplified feedback endings, while pick-one and more-pictures got shortened above-fold support copy with the print-later guide route kept clear. Two commits: c07a658 and 5f049de, now live on GitLab Pages. GPT-5.4 explicitly classified all changes as UX/copy/live-verification only, not new save/print/hang evidence — maintaining the L1-only iteration discipline established across the bedroom, hallway, bathroom, soft-harbor-starter, office-wall, and living-room trims earlier this session. The cumulative L1 surface now spans eight+ distinct page templates, representing a comprehensive UX consistency pass.