CP-Violating Phase δ_CP = 7×(π/6) = 210° from the Fano Plane and G₂ Root System within the OTIS Framework

A parameter-free prediction of the PMNS CP-violating phase is derived from the G₂ root system and the Fano plane PG(2,2). The minimum root angle of G₂ is π/6 = 30°. The Fano plane contains 7 points. The prediction δ_CP = 7×30° = 210° lies within 0.33σ of the experimental value 197°±40° (PDG 2024). At δ_CP = 210°, sin(210°) = −1/2 exactly, directly linking the CP phase to the baryon asymmetry of the Universe. The prediction will be decisively tested by Hyper-Kamiokande (2027–2030) with precision ~10°. Part of the OTIS series (DOI: 10.5281/zenodo.19160535).