Add close underlay btn to collectibles and home menu

lib/ui/common/modals/app_modals.dart

@@ -87,7 +87,11 @@ class _BaseContentModal extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Padding(
+    return IntrinsicHeight(
+      child: Center(
+        child: SizedBox(
+          width: $styles.sizes.maxContentWidth3,
+          child: Padding(
             padding: EdgeInsets.all($styles.insets.lg),
             child: LightText(
               child: SeparatedColumn(
@@ -102,6 +106,9 @@ class _BaseContentModal extends StatelessWidget {
                 ],
               ),
             ),
+          ),
+        ),
+      ),
     );
   }
 }

lib/ui/common/pop_navigator_underlay.dart

@@ -0,0 +1,16 @@
+import 'package:wonders/common_libs.dart';
+
+class PopNavigatorUnderlay extends StatelessWidget {
+  const PopNavigatorUnderlay({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return ExcludeSemantics(
+      child: AppBtn.basic(
+        onPressed: () => Navigator.of(context).pop(),
+        semanticLabel: '',
+        child: const SizedBox.expand(),
+      ),
+    );
+  }
+}

lib/ui/screens/collectible_found/collectible_found_screen.dart

@@ -1,7 +1,9 @@
 import 'package:particle_field/particle_field.dart';
 import 'package:wonders/common_libs.dart';
 import 'package:wonders/logic/data/collectible_data.dart';
+import 'package:wonders/ui/common/app_backdrop.dart';
 import 'package:wonders/ui/common/centered_box.dart';
+import 'package:wonders/ui/common/pop_navigator_underlay.dart';
 
 part 'widgets/_animated_ribbon.dart';
 part 'widgets/_celebration_particles.dart';
@@ -49,8 +51,19 @@ class CollectibleFoundScreen extends StatelessWidget {
   Widget _buildDetail(BuildContext context) {
     Duration t = $styles.times.fast;
     return Stack(key: ValueKey('detail'), children: [
-      Animate().custom(duration: t, builder: (context, ratio, _) => _buildGradient(context, 1, ratio)),
+      /// Background
+      AppBackdrop(
+        strength: .5,
+        child: Container(color: $styles.colors.greyStrong.withOpacity(.96)),
+      ).animate().fadeIn(),
+
+      /// Particles
       _CelebrationParticles(fadeMs: (t * 6).inMilliseconds),
+
+      /// invisible close btn
+      PopNavigatorUnderlay(),
+
+      /// Content
       SafeArea(
         child: CenteredBox(
           width: $styles.sizes.maxContentWidth3,

lib/ui/screens/home_menu/home_menu.dart

@@ -5,6 +5,7 @@ import 'package:wonders/logic/data/wonder_data.dart';
 import 'package:wonders/ui/common/app_backdrop.dart';
 import 'package:wonders/ui/common/app_icons.dart';
 import 'package:wonders/ui/common/controls/locale_switcher.dart';
+import 'package:wonders/ui/common/pop_navigator_underlay.dart';
 import 'package:wonders/ui/screens/home_menu/about_dialog_content.dart';
 
 class HomeMenu extends StatelessWidget {
@@ -48,11 +49,11 @@ class HomeMenu extends StatelessWidget {
         /// Backdrop / Underlay
         AppBackdrop(
           strength: .5,
-          child: Container(
+          child: Container(color: $styles.colors.greyStrong.withOpacity(.7)),
-            color: $styles.colors.greyStrong.withOpacity(.7),
-          ),
         ),
 
+        PopNavigatorUnderlay(),
+
         SafeArea(
           child: PaddedRow(
             padding: EdgeInsets.symmetric(