fix: restore catalogVM.controller wiring lost in RootView rewrite

ios/OralTrainer/Views/RootView.swift

@@ -71,6 +71,8 @@ struct RootView: View {
         }
         .preferredColorScheme(.dark)
         .onAppear {
+            catalogVM.controller = controller
+            controller.setContinuousPlayback(continuousPlayback)
             if auth.isLoggedIn && courses.isEmpty {
                 Task { await loadCourses() }
             }