e200256fdc
10 tasks led by a timeboxed Modern.js + MF 2.0 spike that pins versions and validates the dual-build approach before committing to it. Covers module-federation.config.ts with 4 feature exposes, React 18 singleton, BUILD_TARGET branching in modern.config.ts, and a typed loadRemoteModule wrapper around @module-federation/enhanced runtime for consuming other customer remotes in Phase 2+.