The Alcubierre warp metric requires negative energy density distributed around a spacecraft hull. We propose a conceptual architecture in which a spacecraft hull consists of a large-area array of nano-fabricated Casimir cavities, each within Ford-Roman quantum-inequality bounds, collectively producing an integrated negative energy density profile approximating the spatial boundary conditions of the Alcubierre metric. Segmented, addressable piezoelectric control of hull panels is proposed as a mechanism for dynamic shaping of the metric distortion, addressing the internal-controllability problem of the original warp-bubble scheme. We outline a six-layer nanofabrication stack (SiC substrate, TiN adhesion layer, Au conductor, Au-lined trench array, graphene monolayer, Al2O3 encapsulation), a scaling hypothesis linking per-tile Casimir output to hull-integrated negative energy density, and a four-phase experimental roadmap. No claim is made that the scheme will succeed; the contribution is a concrete, testable structural hypothesis connecting established Casimir physics to the open engineering problem of warp-metric generation.