feat: Implement push notifications in Budget Manager PWA

- Added functionality for subscribing to push notifications in Settings.vue.
- Integrated service worker registration and notification permission requests.
- Enhanced Vite configuration for PWA with manifest and caching strategies.
- Created a script for generating PDF reports.
- Added project report markdown file detailing the PWA implementation and features.

backend/scripts/generate-vapid-keys.js

@@ -0,0 +1,21 @@
+/**
+ * Script to generate VAPID keys for Web Push Notifications
+ * Run with: bun run generate-vapid-keys.js
+ */
+const webpush = require('web-push');
+
+// Generate VAPID keys (public/private key pair)
+const vapidKeys = webpush.generateVAPIDKeys();
+
+console.log('VAPID Keys generated successfully:');
+console.log('===============================');
+console.log('Public Key:');
+console.log(vapidKeys.publicKey);
+console.log('===============================');
+console.log('Private Key:');
+console.log(vapidKeys.privateKey);
+console.log('===============================');
+console.log('Add these to your .env file as:');
+console.log('VAPID_PUBLIC_KEY="' + vapidKeys.publicKey + '"');
+console.log('VAPID_PRIVATE_KEY="' + vapidKeys.privateKey + '"');
+console.log('===============================');