Six papers extending STF First Principles into the complete lepton and quark flavour sector. All results derive from Im(tres) = 0.20913 — a single number from the Picard-Fuchs period integral — with zero additional parameters. The series derives the Cabibbo angle θ₁₂ = 14.1° (8% from PDG), the quark-lepton complementarity relation θ₁₂(lep) + θCabibbo = 45.1°, and BR(Z→μτ) ~ 3×10⁻⁸ accessible at FCC-ee. The period phase φCP = 84.940° is a topological invariant sourcing CKM CP violation geometrically. The lepton mass hierarchy and reactor angle are structural open problems.