fix some potential crashes

Signed-off-by: Toni Förster <toni.foerster@gmail.com>

Model/MenuModel.swift

@@ -3,7 +3,7 @@ import Foundation
 
 final class MenuModel: ObservableObject {
     static let shared = MenuModel()
-    private var cancellables = [AnyCancellable]()
+    private var cancellables = Set<AnyCancellable>()
 
     init() {
         registerChildModel(AccountsModel.shared)
@@ -12,10 +12,16 @@ final class MenuModel: ObservableObject {
     }
 
     func registerChildModel<T: ObservableObject>(_ model: T?) {
-        guard !model.isNil else {
+        guard let model else {
             return
         }
 
-        cancellables.append(model!.objectWillChange.sink { [weak self] _ in self?.objectWillChange.send() })
+        model.objectWillChange
+            .receive(on: DispatchQueue.main) // Ensure the update occurs on the main thread
+            .debounce(for: .milliseconds(10), scheduler: DispatchQueue.main) // Debounce to avoid immediate feedback loops
+            .sink { [weak self] _ in
+                self?.objectWillChange.send()
+            }
+            .store(in: &cancellables)
     }
 }

Shared/YatteeApp.swift

@@ -191,7 +191,7 @@ struct YatteeApp: App {
 
             NavigationModel.shared.tabSelection = section ?? .search
 
-            DispatchQueue.global(qos: .userInitiated).async {
+            DispatchQueue.main.async {
                 playlists.load()
             }