removed theme deprecations

lib/res/theme.dart

@@ -33,7 +33,7 @@ ThemeData themeFrom(Color primaryColor, Brightness brightness) {
       elevation: Dimens.elevationLevel0,
       scrolledUnderElevation: Dimens.elevationLevel2,
       color: scheme.surface,
-      foregroundColor: scheme.onBackground,
+      foregroundColor: scheme.onSurface,
       surfaceTintColor: scheme.surfaceTint,
     ),
     cardTheme: CardTheme(
@@ -83,8 +83,6 @@ ColorScheme _colorSchemeFromColor(Color primaryColor, Brightness brightness) {
 
   return ColorScheme(
     brightness: brightness,
-    background: Color(scheme.background),
-    onBackground: Color(scheme.onBackground),
     error: Color(scheme.error),
     onError: Color(scheme.onError),
     errorContainer: Color(scheme.errorContainer),
@@ -103,7 +101,7 @@ ColorScheme _colorSchemeFromColor(Color primaryColor, Brightness brightness) {
     onTertiaryContainer: Color(scheme.onTertiaryContainer),
     surface: Color(scheme.surface),
     onSurface: Color(scheme.onSurface),
-    surfaceVariant: Color(scheme.surfaceVariant),
+    surfaceContainerHighest: Color(scheme.surfaceContainerHighest),
     onSurfaceVariant: Color(scheme.onSurfaceVariant),
     outline: Color(scheme.outline),
     outlineVariant: Color(scheme.outlineVariant),

lib/screens/metering/components/camera_container/components/camera_controls_placeholder/widget_placeholder_camera_controls.dart

@@ -25,7 +25,7 @@ class CameraControlsPlaceholder extends StatelessWidget {
         const SizedBox(height: Dimens.grid8),
         Text(
           error.toStringLocalized(context),
-          style: Theme.of(context).textTheme.bodyMedium?.copyWith(color: Theme.of(context).colorScheme.onBackground),
+          style: Theme.of(context).textTheme.bodyMedium?.copyWith(color: Theme.of(context).colorScheme.onSurface),
           textAlign: TextAlign.center,
         ),
       ],

lib/screens/metering/components/shared/exposure_pairs_list/components/exposure_pairs_list_item/widget_item_list_exposure_pairs.dart

@@ -62,14 +62,14 @@ class _Title<T extends PhotographyStopValue> extends StatelessWidget {
               value.toString(),
               stepGranularity: 0.5,
               minFontSize: 10,
-              style: labelTextStyle(context).copyWith(color: Theme.of(context).colorScheme.onBackground),
+              style: labelTextStyle(context).copyWith(color: Theme.of(context).colorScheme.onSurface),
               softWrap: false,
               overflow: TextOverflow.fade,
               maxLines: 1,
             )
           : Text(
               value.toString(),
-              style: labelTextStyle(context).copyWith(color: Theme.of(context).colorScheme.onBackground),
+              style: labelTextStyle(context).copyWith(color: Theme.of(context).colorScheme.onSurface),
               softWrap: false,
               overflow: TextOverflow.fade,
               maxLines: 1,
@@ -97,7 +97,7 @@ class _Tick extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return ColoredBox(
-      color: Theme.of(context).colorScheme.onBackground,
+      color: Theme.of(context).colorScheme.onSurface,
       child: SizedBox(
         height: 1,
         width: _length,

lib/screens/metering/components/shared/exposure_pairs_list/widget_list_exposure_pairs.dart

@@ -78,7 +78,7 @@ class ExposurePairsList extends StatelessWidget {
                                       ? constraints.maxHeight / 2
                                       : constraints.maxHeight,
                                   child: ColoredBox(
-                                    color: Theme.of(context).colorScheme.onBackground,
+                                    color: Theme.of(context).colorScheme.onSurface,
                                     child: const SizedBox(width: 1),
                                   ),
                                 ),

lib/screens/shared/centered_slider/widget_slider_centered.dart

@@ -120,7 +120,7 @@ class _Slider extends StatelessWidget {
           width: handleDistance + trackThickness,
           child: ClipRRect(
             borderRadius: BorderRadius.circular(trackThickness / 2),
-            child: ColoredBox(color: Theme.of(context).colorScheme.surfaceVariant),
+            child: ColoredBox(color: Theme.of(context).colorScheme.surfaceContainerHighest),
           ),
         ),
         AnimatedPositioned.fromRect(

lib/screens/shared/icon_placeholder/widget_icon_placeholder.dart

@@ -20,15 +20,12 @@ class IconPlaceholder extends StatelessWidget {
         children: [
           Icon(
             icon,
-            color: Theme.of(context).colorScheme.onBackground,
+            color: Theme.of(context).colorScheme.onSurface,
           ),
           const SizedBox(height: Dimens.grid8),
           Text(
             text,
-            style: Theme.of(context)
+            style: Theme.of(context).textTheme.bodyMedium?.copyWith(color: Theme.of(context).colorScheme.onSurface),
-                .textTheme
-                .bodyMedium
-                ?.copyWith(color: Theme.of(context).colorScheme.onBackground),
             textAlign: TextAlign.center,
           ),
         ],

lib/screens/shared/ruler_slider/widget_slider_ruler.dart

@@ -30,7 +30,7 @@ class RulerSlider extends StatelessWidget {
       children: [
         Text(
           valueAdapter(value),
-          style: Theme.of(context).textTheme.labelLarge!.copyWith(color: Theme.of(context).colorScheme.onBackground),
+          style: Theme.of(context).textTheme.labelLarge!.copyWith(color: Theme.of(context).colorScheme.onSurface),
         ),
         const SizedBox(height: Dimens.grid4),
         Expanded(
@@ -78,7 +78,7 @@ class _Ruler extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final mainTicksFontSize = Theme.of(context).textTheme.bodySmall!.fontSize!;
-    final itemsColor = Theme.of(context).colorScheme.onBackground;
+    final itemsColor = Theme.of(context).colorScheme.onSurface;
     return LayoutBuilder(
       builder: (context, constraints) {
         final bool showAllMainTicks =