forked from unom/punktfunk
Remote INPUT resets the compositor's idle timers, but a passive (video-only) viewer sends none — observed live: a SteamOS Game-Mode host s2idled mid-day and dropped off the network (in a VM with GPU passthrough it never woke again). Refcounted across planes: the native LiveSessionGuard and the GameStream video worker each hold a share; first hold takes the logind sleep:idle block inhibitor on a dedicated plain thread (zbus blocking must not run on a tokio worker), last drop releases. Best-effort: no logind → warn once and stream on. No-op off Linux (macOS/Windows manage their own assertions). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>