Add Enable All / Disable All menu to channel notifications settings

Yattee/Localizable.xcstrings

@@ -11354,6 +11354,28 @@
         }
       }
     },
+    "settings.notifications.disableAll" : {
+      "comment" : "Button to disable notifications for all channels",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Disable All"
+          }
+        }
+      }
+    },
+    "settings.notifications.enableAll" : {
+      "comment" : "Button to enable notifications for all channels",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Enable All"
+          }
+        }
+      }
+    },
     "settings.notifications.noSubscriptions.description" : {
       "comment" : "Description when no subscriptions exist",
       "localizations" : {

Yattee/Views/Settings/NotificationSettingsView.swift

@@ -160,6 +160,7 @@ struct ManageChannelNotificationsView: View {
     @State private var subscriptions: [Subscription] = []
     @State private var isLoading = false
     @State private var errorMessage: String?
+    @State private var refreshID = UUID()
 
     private var subscriptionService: SubscriptionService? { appEnvironment?.subscriptionService }
 
@@ -194,17 +195,46 @@ struct ManageChannelNotificationsView: View {
                 ForEach(subscriptions, id: \.channelID) { subscription in
                     ChannelNotificationToggle(subscription: subscription)
                 }
+                .id(refreshID)
             }
         }
         .navigationTitle(String(localized: "settings.notifications.manageChannels.title"))
         #if os(iOS)
         .navigationBarTitleDisplayMode(.inline)
         #endif
+        .toolbar {
+            if !subscriptions.isEmpty {
+                ToolbarItem(placement: .primaryAction) {
+                    Menu {
+                        Button {
+                            setAllNotifications(enabled: true)
+                        } label: {
+                            Label(String(localized: "settings.notifications.enableAll"), systemImage: "bell.fill")
+                        }
+                        Button {
+                            setAllNotifications(enabled: false)
+                        } label: {
+                            Label(String(localized: "settings.notifications.disableAll"), systemImage: "bell.slash")
+                        }
+                    } label: {
+                        Image(systemName: "ellipsis.circle")
+                    }
+                }
+            }
+        }
         .task {
             await loadSubscriptionsAsync()
         }
     }
 
+    private func setAllNotifications(enabled: Bool) {
+        guard let dataManager = appEnvironment?.dataManager else { return }
+        for subscription in subscriptions {
+            dataManager.setNotificationsEnabled(enabled, for: subscription.channelID)
+        }
+        refreshID = UUID()
+    }
+
     /// Loads subscriptions from the current subscription account provider.
     /// For local accounts, loads from DataManager.
     /// For Invidious/Piped accounts, fetches from the respective API.