Weak-Representation Soldering of the Axis Common Matter Carrier: Common-Body Lepton Architecture, Higgs-Resolved Components, and the Physicalization Boundary

This work develops a common-body lepton architecture for the Axis Model, connecting the established charge-three common-envelope body to a conditional weak and chiral lepton structure. A finite-fiber soldering construction generates the weak doublet algebra, while Parent-charge equivariance selects the common-carrier realization within the existing direct-product gauge structure. Higgs-ray projectors then resolve charged and neutral components on the shared body and produce an exact longitudinal-response null in the neutrino sector. Extending the weak bundle to its full frame-U(2) structure yields the conditional lepton content consisting of a left-handed doublet and right-handed electron and neutrino sectors, together with their relative central characters and canonical Dirac Yukawa channels. These degrees of freedom are internal states of one translating common body; treating the odd lepton sector as a separate propagating field would instead require an additional binding or hybridization mechanism. The physicalization boundary separates the bosonic common-body stability operator from the fermionic population and propagation problem. A physical completion requires common-body spectral overlap, controlled fermionic kinetic support, a neutral one-particle sector, and an infrared-complete dressed charged asymptotic sector. Numerical charge, masses, generation selection, flavor normalization, and the physical hypercharge connection remain open. Version 5 makes the dual-bundle interface explicit. In the raw dual bundle, the charged Yukawa line is the Higgs annihilator, with projector Q_e = I - P_e^vee, while the neutral projector is Q_nu = P_e^vee and the natural dual is P_e^vee = P_e^T. The canonical determinant-twisted rank-two isomorphism transports these projectors consistently through both Yukawa maps, the exterior occupation operator, induced derivatives, longitudinal response, and conditional charge/conjugation conventions. The source package includes a complementary verifier for this interface, the unchanged published regression verifier, and the previously omitted infrared bibliography dependency reconstructed from the three works already cited in the public PDF. This is a representation-interface correction; it does not establish physical electron existence, fermionic statistics, interacting quantum dynamics, or numerical mass and charge predictions.