port C++ UI from broken: ready/splash, ClearPilot menu, onroad widgets, nightrider

Wholesale port of the 10 UI files (main.cc, ui.{cc,h}, onroad.{cc,h},
home.{cc,h}, window.{cc,h}, ready.{cc,h}, SConscript). sidebar.{cc,h}
unchanged.

Brings in:
- splash/ready screen rendered via Qt directly (replaces stock home)
- ready page shown when started but gear=park
- ClearPilot offroad menu (Home/Dashcam/Debug panels) replacing stock
- onroad UI: speed widget reading ClearpilotSpeedDisplay (gpsLocation
  via speed_logicd), speed-limit widget, cruise-vs-limit warning sign
- nightrider mode: camera suppressed, lane lines/path drawn as 2px
  outlines only (ScreenDisplayMode 1 or 4)
- screen power: ScreenDisplayMode 3 forces setAwake(false)
- ignition off blanks screen immediately (tap still wakes)
- Qt-based RPC widget-tree dump server at ipc:///tmp/clearpilot_ui_rpc
- crash handler in main.cc with stack trace

Deviation from broken (3 sites): no_lat_lane_change is read from
paramsMemory (controlsd writes it there in baseline) instead of broken's
custom cereal field frogpilotCarControl.noLatLaneChange. Keeps the
existing self-driving wiring intact.

SConscript drops screenrecorder.cc from qt_src (broken did the same;
omx_encoder.cc still built for dashcamd's future link).

Build clean. UI hasn't been launched yet — that comes after the
controlsd button-handler commit lands.

Translation .ts files are auto-regenerated by Qt's lupdate; included.

selfdrive/ui/qt/onroad.h

@@ -12,7 +12,7 @@
 #include "selfdrive/ui/ui.h"
 #include "selfdrive/ui/qt/widgets/cameraview.h"
 
-#include "selfdrive/frogpilot/screenrecorder/screenrecorder.h"
+// #include "selfdrive/frogpilot/screenrecorder/screenrecorder.h"  // DISABLED: using dashcamd instead
 
 const int btn_size = 192;
 const int img_size = (btn_size / 4) * 3;
@@ -47,16 +47,31 @@ public:
   explicit AnnotatedCameraWidget(VisionStreamType type, QWidget* parent = 0);
   void updateState(const UIState &s);
   void updateLaneEdgeColor(QColor &bgColor);
-  int screenDisplayMode = 0;
 
 private:
   void drawText(QPainter &p, int x, int y, const QString &text, int alpha = 255);
   void drawSpeedWidget(QPainter &p, int x, int y, const QString &title, const QString &speedLimitStr, QColor colorSpeed, int width = 176);
+  void drawSpeedLimitSign(QPainter &p);
+  void drawCruiseWarningSign(QPainter &p);
+  void drawHealthMetrics(QPainter &p);
 
   QVBoxLayout *main_layout;
   QPixmap dm_img;
   float speed;
+  bool has_gps_speed = false;
+  bool nightriderMode = false;
+  int displayMode = 0;
   QString speedUnit;
+
+  // ClearPilot speed state (from params_memory, updated ~2Hz)
+  bool clpHasSpeed = false;
+  QString clpSpeedDisplay;
+  QString clpSpeedLimitDisplay;
+  QString clpSpeedUnit;
+  QString clpCruiseWarning;
+  QString clpCruiseWarningSpeed;
+  int clpParamFrame = 0;
+
   float setSpeed;
   float speedLimit;
   bool is_cruise_set = false;
@@ -89,8 +104,6 @@ private:
   Params paramsMemory{"/dev/shm/params"};
   UIScene &scene;
 
-  ScreenRecorder *recorder_btn;
-
   QHBoxLayout *bottom_layout;
 
   bool alwaysOnLateralActive;