Abstract (v0.2 concept release) The Network–Wave Cosmology (NWC) proposes that spacetime geometry and quantum phenomena both emerge from the interaction between a four-dimensional informational network (N) and a three-dimensional propagating wave field (W). In this formulation, gravitation and cosmic expansion arise from temporal displacement gradients (δV) in the network, not from unseen mass or dark energy. Across nine development phases (A–C), the model has been numerically tested from Planck to cosmological scales using open datasets (Pantheon+SH0ES, BAO, RSD). The universal relations M = (c²/G)·R·δV and E = (c⁴/G)·R·δV hold across all scales (R² ≈ 0.99–1.00) with no free parameters. The same field δV explains both dark-matter-like and dark-energy-like phenomena, and reproduces the ΛCDM expansion curve via a single resonant equation. The purpose of this public draft is to invite constructive feedback on the interpretation of δV as an informational–geometric potential and on the resonance mechanism underlying cosmic expansion. All numerical results were generated in reproducible Colab environments. The accompanying notebooks will be released with version 1.0.