Maxwell Dynamics from the Monadic Real-J Address Dial: A QTT Axiom-to-Field Theorem with Source-Derived Photon Stiffness

From a compact internal dial to Maxwell's equations and a frozen photon stiffness The QTT source packet fixes the leading electromagnetic stiffness before the fine-structure comparator is opened: \[ \frac{\kappa}{\hbar c}=8+\frac{\rho}{2}+D_\lambda^{\mathsf T}G_\lambda D_\lambda,\qquad \alpha_{\rm QTT}^{-1}=4\pi\left(8+\frac{\rho}{2}+D_\lambda^{\mathsf T}G_\lambda D_\lambda\right). \] Combined with the real-J local dial, connected U(1) transport, curvature f=da, the unique leading gauge action, integer circle characters, and worldline holonomy, the same source theorem yields both Maxwell pairs, Coulomb's law, charge quantization, the Aharonov-Bohm phase, and the Lorentz force. Scientific result: a QTT zero-fit source-explanatory victory for leading electromagnetism. Differential forms, U(1) gauge calculus, Bianchi identity, and Euler-Lagrange variation are standard. Their ordering by a finite real-J address packet and the source-derived absolute stiffness are QTT-native. The frozen result αQTT-1=137.035999165998 lies -0.524σ from CODATA 2022. That is one downstream no-retune audit of the source word, not an input and not multiplied into several independent confirmations.