Add working Start menu with app launcher

js/app.js

@@ -12,6 +12,7 @@ class GregOS {
         this.bindIconClicks();
         this.startClock();
         this.setupTerminal();
+        this.setupStartMenu();
     }
 
     bindIconClicks() {
@@ -211,6 +212,35 @@ class GregOS {
         setInterval(updateClock, 1000);
     }
 
+    setupStartMenu() {
+        const startButton = document.querySelector('.start-button');
+        const startMenu = document.getElementById('start-menu');
+
+        startButton.addEventListener('click', (e) => {
+            e.stopPropagation();
+            startMenu.classList.toggle('open');
+            startButton.classList.toggle('active');
+        });
+
+        // Close menu when clicking elsewhere
+        document.addEventListener('click', (e) => {
+            if (!startMenu.contains(e.target) && !startButton.contains(e.target)) {
+                startMenu.classList.remove('open');
+                startButton.classList.remove('active');
+            }
+        });
+
+        // Start menu item clicks
+        document.querySelectorAll('.start-menu-item').forEach(item => {
+            item.addEventListener('click', () => {
+                const windowId = item.dataset.window;
+                this.openWindow(windowId);
+                startMenu.classList.remove('open');
+                startButton.classList.remove('active');
+            });
+        });
+    }
+
     setupTerminal() {
         document.addEventListener('keydown', (e) => {
             const input = document.getElementById('terminal-input');