Silver Geometry: The Unified Framework of Coupling Invariants

Unifies IE-001 through IE-004 into a complete geometric language: the silver geometry, a curved surface in (d,beta) coupling space defined by alpha(d,beta)=1.920. IE-001 defines bounds, IE-002 reveals orientation, IE-003 reads history, IE-004 proves universality. Silver geometry is the unique surface where coupling information is maximally preserved. 48/25=1.920 is exact not approximate, emerging from consistent mathematical structure across all tested domains. GCT Letters series capstone.