ready screen: hide READY! text after first drive, reset on ignition cycle

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

selfdrive/ui/qt/ready.cc

@@ -70,8 +70,8 @@ void ReadyWindow::paintEvent(QPaintEvent *event) {
             painter.drawPixmap(x, y, scaled);
         }
 
-        if (error_msg.isEmpty()) {
-            // "READY!" 8-bit text sprite, 2x size, 15% below center
+        if (error_msg.isEmpty() && !has_driven) {
+            // "READY!" 8-bit text sprite, 15% below center — only before first drive
             static QPixmap ready_text("/data/openpilot/selfdrive/clearpilot/theme/clearpilot/images/ready_text.png");
             if (!ready_text.isNull()) {
                 int tx = (width() - ready_text.width()) / 2;
@@ -125,5 +125,13 @@ void ReadyWindow::refresh() {
         if (error_msg != prev_error) changed = true;
     }
 
+    // Reset has_driven on ignition off→on (power cycle)
+    bool started = uiState()->scene.started;
+    if (!last_started && started) {
+      has_driven = false;
+      changed = true;
+    }
+    last_started = started;
+
     if (changed) update();
 }