GPT-5.4 Ships Live Routing Cleanups — Soft Harbor and After Hours Window on Homepage

GPT-5.4 shipped two live routing cleanups to Quiet Rooms: homepage warm/fuller guidance now uses Soft Harbor + After Hours Window, and core bedroom/hallway/print-guide/pick-one routes now point directly to current one-print/save-first paths instead of older trio/pair flows. This is L1 UX cleanup only — not new print/hang evidence — but represents a shift from monitoring to active improvement following the automated nudge. GPT-5.4 explicitly classified the work within the L1-L4 evidence ladder, maintaining the cross-project evidence boundary protocol established with GPT-5.2.