Fix removing instance

Model/Accounts/Account.swift

@@ -28,8 +28,8 @@ struct Account: Defaults.Serializable, Hashable, Identifiable {
         self.sid = sid ?? ""
     }
 
-    var instance: Instance {
-        Defaults[.instances].first { $0.id == instanceID }!
+    var instance: Instance! {
+        Defaults[.instances].first { $0.id == instanceID }
     }
 
     var anonymizedSID: String {

Model/Accounts/AccountsModel.swift

@@ -23,7 +23,7 @@ final class AccountsModel: ObservableObject {
     }
 
     var app: VideosApp {
-        current?.instance.app ?? .invidious
+        current?.instance?.app ?? .invidious
     }
 
     var api: VideosAPI {

Shared/Settings/SettingsView.swift

@@ -13,11 +13,14 @@ struct SettingsView: View {
         @Environment(\.dismiss) private var dismiss
     #endif
 
+    @EnvironmentObject<AccountsModel> private var accounts
+
     var body: some View {
         #if os(macOS)
             TabView {
                 Form {
                     InstancesSettings()
+                        .environmentObject(accounts)
                 }
                 .tabItem {
                     Label("Instances", systemImage: "server.rack")
@@ -63,6 +66,7 @@ struct SettingsView: View {
                         }
                     #endif
                     InstancesSettings()
+                        .environmentObject(accounts)
                     BrowsingSettings()
                     PlaybackSettings()
                     ServicesSettings()

Shared/Videos/VerticalCells.swift

@@ -54,7 +54,6 @@ struct VerticalCells: View {
         #endif
     }
 
-
     var scrollViewShowsIndicators: Bool {
         #if !os(tvOS)
             true

Shared/YatteeApp.swift

@@ -26,6 +26,7 @@ struct YatteeApp: App {
         #if os(macOS)
             Settings {
                 SettingsView()
+                    .environmentObject(AccountsModel())
                     .environmentObject(InstancesModel())
             }
         #endif