feat(profile): add local profiles with backup and restore

Move Mornye Settings to the Home avatar and keep search above the profile card. Center the metadata artwork and actions, and make artist names clickable in the Material player.

lib/providers/user_profile_provider.dart

@@ -0,0 +1,39 @@
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:spotiflac_android/services/user_profile_store.dart';
+
+final userProfileStoreProvider = Provider<UserProfileStore>(
+  (ref) => UserProfileStore(),
+);
+
+final userProfileProvider =
+    AsyncNotifierProvider<UserProfileNotifier, UserProfile>(
+      UserProfileNotifier.new,
+    );
+
+class UserProfileNotifier extends AsyncNotifier<UserProfile> {
+  @override
+  Future<UserProfile> build() => ref.watch(userProfileStoreProvider).read();
+
+  Future<void> restoreFromBackup(UserProfile profile) async {
+    final path = profile.photoPath;
+    final photo = path == null
+        ? null
+        : await prepareProfilePhoto(await File(path).readAsBytes());
+    await save(name: profile.name, photo: photo, removePhoto: photo == null);
+  }
+
+  Future<void> save({
+    required String name,
+    Uint8List? photo,
+    bool removePhoto = false,
+  }) async {
+    await future;
+    final profile = await ref
+        .read(userProfileStoreProvider)
+        .save(name: name, photo: photo, removePhoto: removePhoto);
+    state = AsyncData(profile);
+  }
+}