refactor: update TabsTheme background color in tab_themes.dart

This commit slightly adjusts the light mode background color for the `TabsTheme` component.

### Key Changes:

*   **`lib/screens/widgets/overrides/tab_themes.dart`**:
    *   Updated the light mode `backgroundColor` from `Colors.blue[100]` to `Colors.blue[50]` to provide a more subtle contrast.

Author: vmeng-b

lib/screens/widgets/overrides/tab_themes.dart

@@ -20,7 +20,7 @@ class TabThemes extends StatelessWidget {
       ),
       child: ComponentTheme(
         data: TabsTheme(
-          backgroundColor: isDark ? Colors.gray[600] : Colors.blue[100],
+          backgroundColor: isDark ? Colors.gray[600] : Colors.blue[50],
         ),
         child: child,
       ),