cursor done.

public/js/main.js

@@ -0,0 +1,24 @@
+import CalendarView from './calendar.js';
+import ServerManager from './serverManager.js';
+import AuthManager from './auth.js';
+
+let authManagerRef = null;
+
+window.addEventListener('DOMContentLoaded', () => {
+  const calendarView = new CalendarView({
+    onUnauthorized: () => authManagerRef && authManagerRef.logout()
+  });
+  calendarView.init();
+
+  const serverManager = new ServerManager();
+  serverManager.init();
+
+  authManagerRef = new AuthManager(calendarView, serverManager);
+  authManagerRef.init();
+
+  serverManager.onChange((server) => {
+    authManagerRef.handleServerSelection(server);
+  });
+
+  authManagerRef.checkExistingSession();
+});