Heat, temperature, vacuum, and dark-energy readout

Heat is read as boundary exchange / transport, not as a primitive substance of disorder. Temperature is the derived defect-gradient readout T_τ(C)=dδω/dS_def(C), not a primitive thermodynamic variable. The vacuum is the coherent boundary state, not a sum of zero-point mode energies. On this readout, dark energy is not introduced as an independent sector; cosmic acceleration is treated as a base-progression / readout effect whose empirical adequacy must be tested.