reset to pre-modification baseline; restart feature work from clean state

Restoring the working tree to the pristine pre-Claude baseline previously
preserved at /data/clearpilot (now /data/clearpilot-baseline). The prior
modified-but-broken tree is snapshotted at /data/openpilot-broken-2026-05-03
and tagged here as pre-reset-2026-05-03 for reference.

From here, features (UI changes, dashcam, telemetry, GPS, display modes,
speed logic, standstill power saving, etc.) will be re-introduced one at
a time with proper testing.

selfdrive/ui/qt/spinner.h

@@ -1,23 +1,36 @@
+#include <array>
+
 #include <QLabel>
 #include <QPixmap>
 #include <QProgressBar>
 #include <QSocketNotifier>
+#include <QVariantAnimation>
 #include <QWidget>
 
+constexpr int spinner_fps = 30;
+constexpr QSize spinner_size = QSize(360, 360);
+
+class TrackWidget : public QWidget  {
+  Q_OBJECT
+public:
+  TrackWidget(QWidget *parent = nullptr);
+
+private:
+  void paintEvent(QPaintEvent *event) override;
+  std::array<QPixmap, spinner_fps> track_imgs;
+  QVariantAnimation m_anim;
+};
+
 class Spinner : public QWidget {
   Q_OBJECT
 
 public:
   explicit Spinner(QWidget *parent = 0);
 
-protected:
-  void paintEvent(QPaintEvent *event) override;
-
 private:
   QLabel *text;
   QProgressBar *progress_bar;
   QSocketNotifier *notifier;
-  QPixmap bg_img;
 
 public slots:
   void update(int n);