fix: center-crop splash logo in portrait mode via negative x offset

Revert logo width clamp — instead let x go negative so GxEPD's drawPixel
clips symmetrically. In portrait (122px wide) x = (122-128)/2 = -3,
cropping 3px from each side rather than 6px from the right only.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

examples/companion_radio/ui-new/UITask.cpp

@@ -71,7 +71,7 @@ public:
 
     // meshcore logo
     display.setColor(DisplayDriver::LIGHT);
-    int logoWidth = min(128, display.width());
+    int logoWidth = 128;
     int logo_y = 3;
     display.drawXbm((display.width() - logoWidth) / 2, logo_y, meshcore_logo, logoWidth, 13);