- Settings: Display page sliders on GetPolicy/SetPolicy (system bus).
- Only the active session should feed Activity/SetSessionState; gate in forge
  on the libseat session being active, or track the active session here.
- Verify Signal under ATL reconnects inside a maintenance window; otherwise
  nudge it from ATL (connectivity change) when the window opens.
- Measure resume-to-network latency and per-cycle energy to tune wake.*.
- Restrict RequestSuspend/SetPowerMode to the active seat (polkit).
- Battery-aware policy: shorter windows and longer intervals when low.
- App lifecycle (foreground/background cgroups) fed by the compositor.
- Radios (rfkill by policy, modem power) and thermal caps if the SoC lacks them.
- Modem/USB wake-on-data as a wake source, once measured for spurious wakes.
