feat: change default platform option and platform specific back button

lib/components/Artist/ArtistProfile.dart

@@ -55,7 +55,7 @@ class ArtistProfile extends HookConsumerWidget {
     return SafeArea(
       child: PlatformScaffold(
         appBar: const PageWindowTitleBar(
-          leading: BackButton(),
+          leading: PlatformBackButton(),
         ),
         body: HookBuilder(
           builder: (context) {

lib/components/Login/TokenLogin.dart

@@ -16,7 +16,7 @@ class TokenLogin extends HookConsumerWidget {
 
     return SafeArea(
       child: Scaffold(
-        appBar: const PageWindowTitleBar(leading: BackButton()),
+        appBar: const PageWindowTitleBar(leading: PlatformBackButton()),
         body: SingleChildScrollView(
           child: Center(
             child: Container(

lib/components/Player/PlayerView.dart

@@ -75,7 +75,7 @@ class PlayerView extends HookConsumerWidget {
               child: Column(
                 children: [
                   PageWindowTitleBar(
-                    leading: const BackButton(),
+                    leading: const PlatformBackButton(),
                     backgroundColor: Colors.transparent,
                     foregroundColor: paletteColor.titleTextColor,
                   ),

lib/components/Playlist/PlaylistGenreView.dart

@@ -21,7 +21,7 @@ class PlaylistGenreView extends ConsumerWidget {
   Widget build(BuildContext context, ref) {
     return Scaffold(
       appBar: const PageWindowTitleBar(
-        leading: BackButton(),
+        leading: PlatformBackButton(),
       ),
       body: Column(
         children: [

lib/components/Settings/Settings.dart

@@ -10,6 +10,7 @@ import 'package:spotube/components/Settings/ColorSchemePickerDialog.dart';
 import 'package:spotube/components/Shared/AdaptiveListTile.dart';
 import 'package:spotube/components/Shared/PageWindowTitleBar.dart';
 import 'package:spotube/hooks/useBreakpoints.dart';
+import 'package:spotube/main.dart';
 import 'package:spotube/models/SpotifyMarkets.dart';
 import 'package:spotube/models/SpotubeTrack.dart';
 import 'package:spotube/provider/Auth.dart';
@@ -204,6 +205,42 @@ class Settings extends HookConsumerWidget {
                         },
                       ),
                     ),
+                    AdaptiveListTile(
+                      leading: const Icon(Icons.ad_units_rounded),
+                      title: const PlatformText("Mimic Platform"),
+                      trailing: (context, update) =>
+                          PlatformDropDownMenu<TargetPlatform>(
+                        value: Spotube.of(context).appPlatform,
+                        items: [
+                          PlatformDropDownMenuItem(
+                            value: TargetPlatform.android,
+                            child: const PlatformText("Android (Material You)"),
+                          ),
+                          PlatformDropDownMenuItem(
+                            value: TargetPlatform.iOS,
+                            child: const PlatformText("iOS (Cupertino)"),
+                          ),
+                          PlatformDropDownMenuItem(
+                            value: TargetPlatform.macOS,
+                            child: const PlatformText("macOS (Aqua)"),
+                          ),
+                          PlatformDropDownMenuItem(
+                            value: TargetPlatform.linux,
+                            child: const PlatformText("Linux (GTK+Libadwaita)"),
+                          ),
+                          PlatformDropDownMenuItem(
+                            value: TargetPlatform.windows,
+                            child: const PlatformText("Windows 11 (Fluent UI)"),
+                          ),
+                        ],
+                        onChanged: (value) {
+                          if (value != null) {
+                            Spotube.of(context).changePlatform(value);
+                            update?.call(() {});
+                          }
+                        },
+                      ),
+                    ),
                     PlatformListTile(
                       leading: const Icon(Icons.palette_outlined),
                       title: const PlatformText("Accent Color Scheme"),

lib/components/Shared/AdaptiveListTile.dart

@@ -37,6 +37,7 @@ class AdaptiveListTile extends HookWidget {
               onTap?.call();
               showPlatformAlertDialog(
                 context,
+                barrierDismissible: true,
                 builder: (context) {
                   return StatefulBuilder(builder: (context, update) {
                     return PlatformAlertDialog(

lib/components/Shared/TrackCollectionView.dart

@@ -115,7 +115,9 @@ class TrackCollectionView<T> extends HookConsumerWidget {
                   backgroundColor: color?.color,
                   foregroundColor: color?.titleTextColor,
                   leading: Row(
-                    children: [BackButton(color: color?.titleTextColor)],
+                    children: [
+                      PlatformBackButton(color: color?.titleTextColor)
+                    ],
                   ),
                 )
               : null,

lib/main.dart

@@ -141,6 +141,11 @@ class Spotube extends StatefulHookConsumerWidget {
 
   @override
   SpotubeState createState() => SpotubeState();
+
+  /// ↓↓ ADDED
+  /// InheritedWidget style accessor to our State object.
+  static SpotubeState of(BuildContext context) =>
+      context.findAncestorStateOfType<SpotubeState>()!;
 }
 
 class SpotubeState extends ConsumerState<Spotube> with WidgetsBindingObserver {
@@ -181,6 +186,13 @@ class SpotubeState extends ConsumerState<Spotube> with WidgetsBindingObserver {
     prevSize = appWindow.size;
   }
 
+  TargetPlatform appPlatform = TargetPlatform.android;
+
+  void changePlatform(TargetPlatform targetPlatform) {
+    appPlatform = targetPlatform;
+    setState(() {});
+  }
+
   @override
   Widget build(BuildContext context) {
     final themeMode =
@@ -199,7 +211,7 @@ class SpotubeState extends ConsumerState<Spotube> with WidgetsBindingObserver {
       };
     }, []);
 
-    platform = TargetPlatform.macOS;
+    platform = appPlatform;
 
     return PlatformApp.router(
       routeInformationParser: router.routeInformationParser,