Build Distribution Readiness

Local build, upload, review, publication, indexing, installation, and live behavior are different facts. Current official channel docs own the details.

Open distribution channel matrix for app stores, web/PWA, Microsoft Store, Steam, and consoles. Open CLI and package distribution for direct download, npm, Homebrew, WinGet, Cargo, or OCI. Open desktop and PC release readiness for signing, installers, and launchers. Open release communication when the release needs a changelog or migration notice.