Release 1.0.0 baseline

MealMood/Views/Settings/SettingsView.swift

@@ -23,6 +23,7 @@ struct SettingsView: View {
         .toolbarBackground(Color.mealMoodBackground, for: .navigationBar)
         .toolbarBackground(.visible, for: .navigationBar)
         .environment(\.isEnabled, true)
+        .toast(isShowing: $viewModel.showToast, message: viewModel.toastMessage)
     }
 
     @ViewBuilder
@@ -64,7 +65,8 @@ struct SettingsView: View {
                             Task {
                                 let granted = await viewModel.requestCalendarAccess()
                                 if granted {
-                                    settings.syncEnabled = true
+                                    let hasCalendar = viewModel.ensureValidCalendarSelection(settings: settings)
+                                    settings.syncEnabled = hasCalendar
                                 }
                             }
                         } else {
@@ -214,7 +216,8 @@ struct SettingsView: View {
         .tint(.mealMoodCoral)
         .onAppear {
             if settings.syncEnabled {
-                viewModel.loadCalendars()
+                let hasCalendar = viewModel.ensureValidCalendarSelection(settings: settings)
+                settings.syncEnabled = hasCalendar
             }
         }
         .alert("calendar_permission_title", isPresented: $viewModel.showCalendarPermissionAlert) {