Geometric Resistance of Expanding Space-Time (GREST): A Phenomenological Metric-Response Framework for Galactic Dynamics

This version presents the validated, unit-locked implementation of the GREST(Geometric Resistance of Expanding Space-Time) framework. It supersedes earlier theoretical drafts by including:• explicit quadratic field equations,• fixed physical constants derived from H₀,• embedded figures,• internal galactic validation (RAR, BTFR, NGC 1052–DF2),• external stellar-scale validation using Gaia DR3 wide binaries. The framework is phenomenological, non-relativistic, and fully reproducible.Source code and data are provided via the linked GitHub repository.