fix: wire PWA icons and manifest for installability

Update app metadata and service worker icon references to use the PWA icon set, and add required public icon assets so Chrome can offer install.

Made-with: Cursor

public/sw.js

@@ -4,7 +4,7 @@ self.addEventListener('push', function (event) {
         const options = {
             body: data.body,
             icon: '/icon-192.png',
-            badge: '/badge.png',
+            badge: '/icon-192.png',
             data: {
                 url: data.url || '/'
             },

src/app/layout.tsx

@@ -17,9 +17,13 @@ const geistMono = Geist_Mono({
 export const metadata: Metadata = {
   title: "JUNO | Modern Commerce Infrastructure",
   description: "The world's most advanced encrypted ecosystem for vendors and suppliers.",
+  manifest: "/manifest.webmanifest",
   icons: {
-    icon: "/icon.png",
-    apple: "/logo.png",
+    icon: [
+      { url: "/icon-192.png", sizes: "192x192", type: "image/png" },
+      { url: "/icon-512.png", sizes: "512x512", type: "image/png" },
+    ],
+    apple: "/apple-icon.png",
   },
   appleWebApp: {
     capable: true,