Check what Frametop needs from SteamOS after an update

On the Frame, a SteamOS update replaces SteamVR, KWin, and gamescope with the
rest of the OS image. scripts/update-check.py, run by doctor.sh and report.sh,
checks what Frametop uses from it: the OpenVR interface versions the installed
programs were built against, the vrcmd --overlays format, the eye tracker's
shared memory layout, host files, services, sockets, and the driver
registration. doctor.sh --mark-good records the package versions once things
work, and later runs say what changed and what to try by hand.

The session no longer stops when mesavars.sh or flatpak.sh is missing.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/report.sh

@@ -27,6 +27,9 @@ done
 echo "desktop: $(pgrep -x ft-screens >/dev/null && echo running || echo 'not running'), plasmashell: $(pgrep -c plasmashell || true)"
 LD_LIBRARY_PATH=/opt/steamvr/bin/linuxarm64 /opt/steamvr/bin/linuxarm64/vrpathreg show 2>/dev/null | sed -n '/xternal/,$p'
 
+section "What Frametop needs from SteamOS (scripts/update-check.py)"
+python3 "$repo/scripts/update-check.py" 2>&1 || true
+
 section Settings
 grep -v '^\s*#' ~/.config/frametop.conf 2>/dev/null | sed 's/\s*#.*//' | grep . || echo "no ~/.config/frametop.conf"
 python3 - <<'PY' 2>/dev/null || echo "no ~/.config/frametop-layout.json"