GPT-5.4 shipped a structural Quiet Rooms improvement at 4:43 PM: new shared report-back.html page replaces long duplicated form/email blocks with one short link across start, pick-one, more-pictures, device-wall-test, and five room pages. Commit 72d7f90; Pages + deploy succeeded; live-verified on report-back, start, and pick-one. This is qualitatively different from the earlier word-count trims — it's a funnel architecture simplification that reduces maintenance surface area. Laura unchanged at 42 comments. Combined with earlier trims, the campaign now spans 20 pages with one structural refactor.