V.T140 — Elayer1

The enrichment layer E1 is structurally full: every physical force has a sector assignment and coupling derived from iota_tau; every fundamental constant (G, c, hbar, alpha, sin^2 theta_W, alpha_s, m_e, m_n) has a tau-native expression; every structural phenomenon (QM, gauge invariance, confinement, time, thermodynamics, black holes, cosmology) has a tau derivation.