EntryProof v1.2.0: Lever sweep, PSEO expansion, and portfolio-wide hardening

A lever-sweep pass added three more platform PSEO pages, broker LOI CSV export prep, and Delta lifecycle emails with exit-intent capture. Eight fixes from an EntryProof-specific review closed out a warm-ping issue, a missing score tooltip, the case-study accordion, dynamic day counting, a cohort-counter fallback, source validation on inbound leads, and a PixelProof cross-sell placement.

This day's portfolio-wide hardening pass also touched EntryProof directly: sanitized error responses, type-guarded POST bodies, closed CSRF/enum gaps, custom 404/500 pages, iOS input-zoom and ToS/methodology copy fixes, and full-funnel PostHog conversion tracking.

The broker LOI CSV export prep exists because EntryProof's early growth motion leans on customs brokers referring their import clients, not paid ads. A broker needs a clean list of prospects to reach out to, and that list has to come from somewhere real rather than being assembled by hand. The cross-pick PostHog funnel wiring that shipped the same day means EntryProof's conversion funnel (checker run to email capture to founding-cohort signup) is now measured the same way PixelProof's and TariffWatch's are, on one shared events schema.