3559 - Provenance — ContextQMD

Game Center Matchmaking — New NetplayGameCenterView uses GKMatchmakerViewController (iOS/visionOS) to pair players via Apple Game Center; once matched, the host broadcasts their port and the peer auto-joins via RetroArch netplay.
Netplay Deep Link Handler — NetplayDeepLinkHandlerModifier observes provenance://netplay/join?… deep links app-wide and presents a confirmation alert so users can accept or decline incoming invite links.

Relay server not pre-populated — NetplaySettingsView now defaults to ra.me on a fresh install instead of an empty string; invite link default and fromStoredDefaults fallback are aligned to the same hostname.