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>

selfdrive/ui/qt/home.cc

@@ -85,19 +85,24 @@ void HomeWindow::updateState(const UIState &s) {
     showDriverView(s.scene.driver_camera_timer >= 10, true);
 
     // CLEARPILOT: show splash screen when onroad but in park
+    // In nightrider mode (states 1,4), stay on onroad view in park — only offroad transition shows splash
     bool parked = s.scene.parked;
+    int screenMode = paramsMemory.getInt("ScreenDisplayMode");
+    bool nightrider = (screenMode == 1 || screenMode == 4);
+
     if (parked && !was_parked_onroad) {
-      LOGW("CLP UI: park transition -> showing splash");
-      slayout->setCurrentWidget(ready);
+      if (!nightrider) {
+        LOGW("CLP UI: park transition -> showing splash");
+        slayout->setCurrentWidget(ready);
+      }
     } else if (!parked && was_parked_onroad) {
       LOGW("CLP UI: drive transition -> showing onroad");
       slayout->setCurrentWidget(onroad);
     }
     was_parked_onroad = parked;
 
-    // CLEARPILOT: honor display on/off while showing splash in park
+    // CLEARPILOT: honor display on/off while showing splash in park (normal mode only)
     if (parked && ready->isVisible()) {
-      int screenMode = paramsMemory.getInt("ScreenDisplayMode");
       if (screenMode == 3) {
         Hardware::set_display_power(false);
       } else {