Stop hybrid GPU mode queries from hanging (#6738)

* Bound hybrid GPU mode queries

* Test blocked hybrid GPU queries

* Give the blocked-client test headroom over its 12s of kill cycles

The third case spends ~12s of real TERM/KILL escalation against its own
15s watchdog, which can tip to a spurious 124 on a loaded machine. Also
drop the TEST_LOG plumbing no stub ever wrote.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

bin/omarchy-toggle-hybrid-gpu

@@ -22,7 +22,20 @@ CONF
   sudo systemctl enable --now supergfxd
 fi
 
-gpu_mode=$(supergfxctl -g)
+gpu_mode=""
+for attempt in {1..3}; do
+  if gpu_mode=$(timeout --kill-after=1s 3s supergfxctl -g 2>/dev/null) && [[ -n $gpu_mode ]]; then
+    break
+  fi
+
+  gpu_mode=""
+  (( attempt < 3 )) && sleep 1
+done
+
+if [[ -z $gpu_mode ]]; then
+  echo "supergfxd is not responding. Try again, or check: systemctl status supergfxd" >&2
+  exit 1
+fi
 
 case "$gpu_mode" in
 "Integrated")