QTT Completed-Event Transport and Quantum Coherence

Real-dial dynamics, conditional interactions, and optical interference \\[G-F^{T}GF=L^{T}ML,\\qquad L=0,\\quad FJ=JF\\quad\\Longrightarrow\\quad U_F^\\dagger U_F=I.\\] When does a completed-record transport become a unitary quantum evolution? This paper constructs the amplitude map from a fixed record rule, a static coherent encoding and an oriented real dial. For a measure-preserving source, the matrix on the right is the exact loss into modes outside the retained sector. Zero leakage and dial compatibility yield complex-linear unitary propagation, with no amplitude matrix supplied as a constructor. A general counting-channel theorem separates ancestry loss from mode leakage. An exhaustive 32-configuration coincidence contact provides a concrete interaction certificate. A further composition theorem distinguishes coherence returning from retained memory from the genuinely different process that discards that memory at every step. The complete optical development is retained: symmetry selection of the pi/8 spinor character, quadratic capacity, conditional probability and detector results, eleven memory histories, calibrated signal identifiability, higher-order interference, and the observational tables. The new source framework makes their propagation premises more explicit without changing their numerical predictions or existing experimental seals. The results are exact in their declared mathematical classes. The contact's constitutive rule, physical encoding, complete environment inventory and action-duration allocation require physical identification. The finite contact's phase compensation is a port-frame transformation, not a new measured clock angle. QTT is a speculative physical theory; this edition reports no new experiment or empirical selection. Ali Attar, Independent Researcher, Colombes, France. ORCID: 0009-0008-9931-2691. Research manuscript and reproducibility files are restricted; metadata are public. The source-model proofs are accompanied by exact finite enumeration, negative controls and preserved observational reconstruction. Dependencies: Main Book, Hamiltonian Framework, Lagrangian Framework. Mathematical antecedents include Koopman's measure-preserving transport and reversible computation. Same-author sources identify dependencies, not independent observations.