Holographic Saturation II: Division-Algebraic Gauge Structure, Entropic Symmetry Breaking, and Orbit-Channel Closure

We develop the internal transport sector of the bounded saturation fieldI=√s\,eiθ introduced in Part~I. The construction uses fourstructures: a holographic saturation principle, a conserved Born phase, unitaryClifford transport, and the binary configurational free energy of a boundedchannel. Through the Cayley--Dickson towerR⊂ C⊂ H⊂ O, these ingredientsselect a division-algebraic realisation of Standard-Model gauge kinematics underone explicitly stated maximal-capacity completion. The vector-fields-on-spheresclassification isolates the octonionic rung; a fixed Born complex directionreduces G₂ to exactly $SU(3)$, with three colours, the3⊕3̄ transverse module, and the meson--baryon singletforms. The quaternionic rung gives the electroweak factor in its global form$U(2)$, the Higgs bidoublet, the hypercharge ratio, and custodialSO(4)→ SU(2)diag. The same entropic potential makes the symmetricpoint a non-analytic boundary and yields a Fermi vacuum, a ² Higgsrigidity, and a crossover in the minimal finite-temperature completion. TheClifford--Fock module supplies one anomaly-free generation and an exhaustivemass-sector census with a unique right-handed Majorana invariant. The three sector weights satisfySᵢ=κᵢαZNᵢ with (Nᵢ)=(3,13,16). A common invariant-projectormeasure fixes(κ_σ,κ_Φ,κ_ψ)=(1/4π,1,2), while relative-entropystationarity givesμi, sec²/(2Λᵢ( sec))=ln[(1-Sᵢ)/Sᵢ].The intrinsic galactic occupation is therefores₀=αZ³/(4π)=3.80×10⁻⁸, and the electroweak and colourchannels reproduce the quoted SPARC normalisation and QCD string scale withoutsector-specific continuous prefactors. The Born phase simultaneously fixes the internal complex direction and suppliesthe timelike spacetime direction of the universal reciprocal metric developedin Part~I. The geometric Born current is distinguished from the canonicallynormalised Noether current J^μ=f²s∇^μθ; a non-zero conservedcharge selects a unique, linearly stable timelike branch without changing theG₂→ SU(3) stabiliser. Clifford transport and an explicit constrained parent action are written withthe same universal physical metric gμν used bymatter, photons, and tensor modes; that action is shown in Part~I to propagateexactly four degrees of freedom, with the Born phase sharing the observablecone identically. The algebraic groups, representations,anomaly cancellation, orbit measure, and symmetry-breaking mechanism arederived or numerically certified at the stated level. The same Fock lift supplies the discrete occupation registers used in Part~III, but these internal operators are not identified with propagating Standard-Model fields. Confinement dynamics, flavour, the complete propagating chiral QFT, all-order ultraviolet protection, and the independent Standard-Model and graviton vacuum sectors remain open.