Checklist v4 from contracts: step 31, each wheel by hand

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

lib/pages/settings.dart

@@ -9,6 +9,7 @@ import '../link/net.dart';
 import '../shell_scope.dart';
 import '../theme/light.dart';
 import '../theme/palette.dart';
+import '../theme/sun.dart';
 
 class SettingsPage extends StatelessWidget {
   const SettingsPage({
@@ -58,14 +59,20 @@ class SettingsPage extends StatelessWidget {
               title: const Text('Dark or bright'),
               subtitle: ValueListenableBuilder(
                 valueListenable: themes.lux,
-                builder: (context, lux, _) => Text(
-                  lux == null
-                      ? "Auto follows Android's dark theme and its schedule (no light sensor). "
-                            'The status bar button holds one; a long press there is auto again.'
-                      : 'Auto follows the light sensor: dark at ${LightSwitch.darkAt.round()} lux or less, '
-                            'bright from ${LightSwitch.brightAt.round()}; now ${lux.toStringAsFixed(lux < 10 ? 1 : 0)} lux. '
-                            'The status bar button holds one; a long press there is auto again.',
-                ),
+                builder: (context, lux, _) {
+                  final sun = themes.sunElevationNow;
+                  final now = lux != null
+                      ? 'now ${lux.toStringAsFixed(lux < 10 ? 1 : 0)} lux; dark at '
+                            '${LightSwitch.darkAt.round()} or less, bright from ${LightSwitch.brightAt.round()}'
+                      : sun != null
+                      ? 'now ${sun.round()}° above the horizon at the last GNSS position; '
+                            'dark below ${darkBelowDeg.round()}°'
+                      : 'no GNSS position yet';
+                  return Text(
+                    'Auto follows ${themes.autoSource} ($now). '
+                    'The status bar button holds one; a long press there is auto again.',
+                  );
+                },
               ),
             ),
             Padding(