Sector Paper XXIII — The Ultra‑Global δI‑Collapse Surface and Terminal‑State Horizon Geometry

Sector XXIII presents the ultra‑global δI‑Collapse Surface and the terminal‑state horizon geometry predicted by the Unified Information Substrate. The δI‑substrate generates a final, globally coherent collapse surface where correlation‑flow, gradient‑zone amplification, and collapse‑energy operators reach their terminal configuration. This sector shows how ultra‑global contraction, horizon‑surface sealing, and terminal‑state geometry arise directly from δI‑structure without requiring classical singularities. Sector XXIII completes the horizon‑collapse chain and establishes the substrate‑level description of terminal‑state formation.