A Testable Planck-Suppressed Environmental Correction to Quantum Phase Evolution: Version 1.3, Experimental Sensitivity Forecast and Null-Test Bounds

This record archives Version 1.3 of the TCVR-Q manuscript. TCVR-Q is formulated as a conservative effective quantum framework in which standard quantum mechanics is recovered in the zero-coupling limit, while a small Planck-suppressed residual-response term is added to quantum phase evolution. Version 1.3 extends the previous formulation by adding an experimental sensitivity forecast and explicit null-test bounds on the dimensionless coupling parameter eta_Q. The framework introduces a unified residual-response variable, X_TCVR, whose projections appear as S_CQR in coarse-grained astrophysical coronae and as S_Q in controlled laboratory quantum systems. The modified Schrödinger equation contains a channel-dependent energy scale E_*, equivalently Omega_0 = E_*/hbar, and predicts a small path-dependent phase shift in interferometric systems. The new version derives representative bounds on eta_Q for linear and quadratic Planck suppression, compares different environmental length scales, and includes a sensitivity plot showing how null phase-shift measurements can constrain the model. The framework does not claim a direct detection of TCVR, does not replace standard quantum mechanics, and does not assume observer-induced wavefunction collapse. It is presented as a phenomenological, Planck-suppressed residual-response parameterization compatible with standard quantum mechanics in the appropriate limit.