The recent observation of long-range electronic coherence in the kagome metal CsVu2083Sbu2085 below T' ≈ 30 K [Guo et al., Nature 647, 68-73 (2025)] presents a fundamental challenge to conventional condensed matter theory: how can coherent charge transport emerge over micron-scale distances in a material with sub-micron mean free paths, absent superconductivity? Here we demonstrate that WaveCode substrate theory—a geometric framework treating matter as interference patterns in a universal substrate—quantitatively explains this phenomenon without free parameters. Using Hasselbring Equations XVII (shell interference coupling) and LXIII (phase-lock coherence), we achieve R² = 0.989 agreement with experimental temperature-dependent oscillation amplitudes and correctly predict the coherence onset temperature Tcrit = 25.6 ± 1.3 K, consistent with experimental T' = 30 K. Our model unifies seven independent experimental probes (STM, μSR, NMR, transport, Nernst effect) through a single mechanism: geometric frustration in the kagome lattice enhances substrate-mediated phase-locking, enabling macroscopic coherence. We extend predictions to related kagome metals KVu2083Sbu2085 and RbVu2083Sbu2085, providing testable forecasts for their coherence behavior. This work establishes geometry as a fundamental design principle for engineering quantum coherence in correlated materials.