Per-device install steps in one place: Linux (Flatpak via flatpak.unom.io +
native apt/rpm/Arch), Steam Deck, Windows (signed MSIX from the registry),
macOS (notarized DMG from releases), and iOS/Android (store/beta links). Adds
it to the Connecting nav and cross-links clients.md, whose Linux/Flatpak bullet
now points at the hosted flatpak.unom.io repo instead of the bundle README.
Mobile store/TestFlight URLs are placeholders pending the public listings.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
