bench mode, ClearPilot menu, status window, UI introspection RPC

Bench mode (--bench flag):
- bench_onroad.py publishes fake vehicle state as managed process
- manager blocks real car processes (pandad, thermald, controlsd, etc.)
- bench_cmd.py for setting params and querying UI state
- BLOCKER: UI segfaults (SIGSEGV) when OnroadWindow becomes visible
  without camera frames — need to make CameraWidget handle missing
  VisionIPC gracefully before bench drive mode works

ClearPilot menu:
- Replaced grid launcher with sidebar settings panel (ClearPilotPanel)
- Sidebar: Home, Dashcam, Debug
- Home panel: Status and System Settings buttons
- Debug panel: telemetry logging toggle (ParamControl)
- Tap from any view (splash, onroad) opens ClearPilotPanel
- Back button returns to splash/onroad

Status window:
- Live system stats refreshing every 1 second
- Storage, RAM, load, IP, WiFi, VPN, GPS, time, telemetry status
- Tap anywhere to close, returns to previous view
- Honors interactive timeout

UI introspection RPC:
- ZMQ REP server at ipc:///tmp/clearpilot_ui_rpc
- Dumps full widget tree with visibility, geometry, stacked indices
- bench_cmd dump queries it, detects crash loops via process uptime
- ui_dump.py standalone tool

Other:
- Telemetry toggle wired to TelemetryEnabled param with disk space guard
- Telemetry disabled on every manager start
- Blinking red circle on onroad UI when telemetry recording
- Fixed showDriverView overriding park/drive transitions every frame
- Fixed offroadTransition sidebar visibility race in MainWindow
- launch_openpilot.sh: cd to /data/openpilot, --bench flag support

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

selfdrive/ui/qt/home.h

@@ -4,6 +4,7 @@
 #include <QLabel>
 #include <QPushButton>
 #include <QStackedLayout>
+#include <QStackedWidget>
 #include <QTimer>
 #include <QWidget>
 
@@ -16,14 +17,19 @@
 #include "selfdrive/ui/qt/widgets/offroad_alerts.h"
 #include "selfdrive/ui/ui.h"
 
-class OffroadHome : public QFrame {
+class ClearPilotPanel : public QFrame {
   Q_OBJECT
 
 public:
-  explicit OffroadHome(QWidget* parent = 0);
+  explicit ClearPilotPanel(QWidget* parent = 0);
 
 signals:
   void openSettings(int index = 0, const QString &param = "");
+  void openStatus();
+  void closePanel();
+
+private:
+  QStackedWidget *panel_widget;
 };
 
 class HomeWindow : public QWidget {
@@ -35,6 +41,7 @@ public:
 
 signals:
   void openSettings(int index = 0, const QString &param = "");
+  void openStatus();
   void closeSettings();
 
 public slots:
@@ -49,7 +56,7 @@ protected:
 
 private:
   Sidebar *sidebar;
-  OffroadHome *home;
+  ClearPilotPanel *home;
   OnroadWindow *onroad;
   DriverViewWindow *driver_view;
   QStackedLayout *slayout;