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 electromagnetic extension derives two transverse positive-frequency modes from the monadic connection and Maxwell constraints, then derives helicities \\(+\\hbar\\) and \\(-\\hbar\\) from their spatial rotation law and the inherited action unit. An exact finite cochain certificate preserves Gauss constraints and positive energy. The argument distinguishes physical spin-one rotations from the spinor half-angle coordinates used in polarization optics. It does not infer spin from the number of amplitudes. The positive quadratic electromagnetic sector and its homogeneous spatial reconstruction are stated explicitly; all five preceding parts remain intact. The completed-record sampling extension constructs pointer-channel capacities from a specified source transport and proves a conditional local-balance theorem with an exact finite-run boundary bound. A necessary-and-sufficient cycle criterion checks finite deterministic detector candidates. The current contact supplies exact capacity equivariance, while its affine positive preparation requires a different physical detector interface to reproduce general Born outcomes. A separate stochastic route keeps drift, memory, losses and counting fluctuations explicit. The physical selection of the sampling law remains open; the six preceding parts are preserved without changing their theorem or observational status. The interaction extension derives the unique reversible Boolean latch for independently specified coincidence activation, classifies its port-frame freedom, and fixes the principal generator and spectral action of a declared involution. An independently specified monadic source current supplies a mode's force and work coupling without an additional response coefficient. Many-source common-dial composition is fixed by the balanced scalar identification, including product normalization, associativity and compatibility with local operations. For the stationary quadratic electromagnetic sector, work energy and phase frequency are calculated independently. Canonical excitation gaps and action-compatible clock maps then give \\(\\Delta E_{\\rm lab}=\\hbar\\omega_{\\rm lab}\\), with receiver work, loss channels, energy-zero freedom and finite-tick aliases distinguished explicitly. The results are exact in their declared mathematical classes. Selecting a general physical contact, realizing common-dial composition in a particular apparatus, and deriving actual detector sampling retain their stated source obligations. 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. Maxwell Dynamics. Mathematical antecedents include Koopman's measure-preserving transport and reversible computation. Same-author sources identify dependencies, not independent observations.