feat(l1): Status page and screen replace Radio/GPS/Sensors pages and Diagnostics

Home's Radio, GPS and Sensors pages become one Status page: four tiles split
by dotted rules (radio, GPS, battery, nodes), each a headline over a detail.
Enter opens the Status screen, tabs Radio / GPS / Sky / Power / Mesh /
System, which also takes over Tools > Diagnostics and Tools > Satellites
(the sky plot now lives in SkyView.h). GPS on/off moves to Enter on its tab.

New InfoKit.h holds the shared pieces, sized from the font: label/value row
(a long value takes its own line), centred section title, meter, chip, big
number with unit, switch, history line (one sample a minute) and a block
flow that scrolls a tab by whole blocks.

The Status page keeps the old Radio bit and shows when any of the three old
pages did; the save format is unchanged. The L1 degree sign was a cp437
byte the UTF-8 renderer drew as a box; now U+00B0. The perf walk covers
every Home page and Status tab.

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

examples/companion_radio/ui-new/UITask.h

@@ -116,8 +116,7 @@ class UITask : public UITaskBase, public UiCoreHost {
   UIScreen* locator_screen = nullptr;
   UIScreen* trail_screen = nullptr;
   UIScreen* compass_screen = nullptr;
-  UIScreen* satellites_screen = nullptr;   // Tools > Satellites (-D GPS_SKYVIEW)
-  UIScreen* diag_screen = nullptr;
+  UIScreen* status_screen = nullptr;   // Home › Status (radio, GPS, sky, power, mesh, system)
   UIScreen* repeater_screen = nullptr;
   UIScreen* clock_tools = nullptr;
 #if defined(PIN_GPIO1)
@@ -331,8 +330,7 @@ public:
   void gotoTrailScreen();
   void gotoMapScreen();   // opens the Trail screen directly in its Map view
   void gotoCompassScreen();
-  void gotoSatellitesScreen();
-  void gotoDiagnosticsScreen();
+  void gotoStatusScreen(uint8_t tab);   // StatusScreen::Tab
   void gotoRepeaterScreen();
   void gotoGpioScreen();   // no-op on boards without user GPIO pins (see PIN_GPIO1)
   void gotoClockTools();   // Alarm / Timer / Stopwatch (from the home Clock page)