fix: for splash screen (#2282)

Author: LynxLynxx

catalyst_voices/apps/voices/lib/app/view/app_content.dart

@@ -75,8 +75,12 @@ final class _AppContent extends StatelessWidget {
         return AppActiveStateListener(
           child: GlobalPrecacheImages(
             child: GlobalSessionListener(
-              child: AppMobileAccessRestriction(
-                child: AppSplashScreenManager(
+              // IMPORTANT: AppSplashScreenManager must be placed above all
+              // widgets that render visible UI elements. Any widget that
+              // displays content should be a descendant of
+              //AppSplashScreenManager to ensure proper splash screen behavior.
+              child: AppSplashScreenManager(
+                child: AppMobileAccessRestriction(
                   child: child ?? const SizedBox.shrink(),
                 ),
               ),

catalyst_voices/apps/voices/lib/app/view/app_mobile_access_restriction.dart

@@ -100,6 +100,7 @@ class _Background extends StatelessWidget {
       painter: BubblePainter(
         bubbles: _buildBubbles(),
         shapes: _buildShapes(),
+        backgroundColor: const Color(0xFF9BDDF7),
       ),
       size: Size.infinite,
     );