nightrider mode improvements, nice monitor, ready text 1x

- Nightrider: lines 1px wider (3px outline), engagement border hidden,
  planner lines hidden when disengaged, stay on onroad view in park
- Normal mode only: return to ready splash on park
- Ready text sprite at native 1x size
- Nice monitor: keeps claude processes at nice 19, runs every 30s

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

launch_openpilot.sh

@@ -20,6 +20,9 @@ bash /data/openpilot/system/clearpilot/on_start.sh
 # CLEARPILOT: start VPN monitor (kills previous instances, runs as root)
 sudo bash -c 'nohup /data/openpilot/system/clearpilot/vpn-monitor.sh >> /tmp/vpn-monitor.log 2>&1 &'
 
+# CLEARPILOT: start nice monitor (keeps claude at nice 19)
+sudo bash -c 'nohup /data/openpilot/system/clearpilot/nice-monitor.sh > /dev/null 2>&1 &'
+
 # CLEARPILOT: pass --bench flag through to manager via env var
 if [ "$1" = "--bench" ]; then
   export BENCH_MODE=1