feat(ui): a turn dial / compass rose on narrow navigation screens

navview::draw (Waypoints, trail back, Nearby, a message's location) shows a
dial beside the lines, or under them on a tall screen (portrait e-ink) where
that makes it larger: with a course a turn dial (the top is where you're
heading, the arrow points at the target, "Turn R 55"), without it the compass
rose. The 4.2" screens keep theirs. On a short screen (the 64 px OLED) the
gap under the distance and the pitch of the lines give way so the ETA is not
cut off at the bottom.

sim_nav_waypoint() opens a waypoint's navigate view from the simulator page.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

examples/companion_radio/ui-new/TrailScreen.h

@@ -117,6 +117,7 @@ public:
 
   // Forwarded to UITask's GPS duty-cycle hold — see WaypointsView::needsLiveGps().
   bool wpNeedsLiveGps() const { return _wp.needsLiveGps(); }
+  void simWaypointNav(int row) { _wp.simNav(row); }   // sim tests
 
   int render(DisplayDriver& display) override {
     display.setTextSize(1);