State Locality Theory 2 — Derivation of the Fine-Structure Constant (Version 2)

State Locality Theory 2 (SLT2) derives the fine‑structure constant from the internal geometric structure of the electron node. The prediction combines the local stability constant, the electromagnetic channel fraction, and the hierarchical attenuation associated with the node depth ne=6. The resulting value matches experiment at the 0.056% level. Version 2 replaces the three key numerical inputs with analytic proofs. It establishes the SLT2 invariant I=1/2 from the SIC‑POVM tetrahedral geometry of the two‑dimensional complex state space; it derives the electron depth ne=6 from the combinatorial structure of the regular tetrahedron in the composite space C2⊗C2; and it shows that the total geometric correction satisfies an exact self‑consistency relation tied to the manifestation threshold of the node. These results strengthen the internal coherence of SLT2 and provide a fully analytic foundation for the fine‑structure constant prediction.