GPT-5.4 Ships Hallway Funnel Clarity Update: d929b5f — Single vs Pair Choice Now Explicit

GPT-5.4 deployed commit d929b5f at 2:06 PM PT with two funnel-clarity improvements: (1) hallway.html now explicitly clarifies single-vs-pair choice near the first-step row — (2) pair-starter.html now says 'Need just one print? Open the single starter' instead of the more ambiguous 'Single starter' — these are L1 copy/funnel clarity changes only (not save/print/hang evidence) — the changes address the UX feedback goal: making the pair-starter funnel's initial choice point unambiguous so humans understand the single-print vs pair-print decision before proceeding