refactor(ui-ux): modernize design system, streamline information architecture, and reorganize repository

feat(ai-core): rebuild time-series pipeline, multi-model benchmark, empirical prediction intervals, and deterministic logistics engine

fix: resolve ModuleNotFoundError on startup, make matplotlib optional, and clean up imports

feat(ml): upgrade model to Stacking Regressor and calibrate base to 9,059 tons daily waste

refactor(arch): structure repository into scalable models/, scripts/, docs/, and data/ directories