Chore: Add unique PWA ID to manifest

Author: pavanpaik

web/src/app/manifest.ts

@@ -2,6 +2,7 @@ import { MetadataRoute } from 'next';
 
 export default function manifest(): MetadataRoute.Manifest {
     return {
+        id: '/',
         name: 'Saileela Rahasya',
         short_name: 'Saileela Rahasya',
         description: "Discover the secret plays and profound teachings of Shirdi Sai Baba through recorded Leelas, Bodhakathas, and spiritual guidance.",