Fix console warnings: remove SW registration, fix meta tag, clean manifest

- Remove service worker registration from footer (SW is already self-unregistering)
- Add mobile-web-app-capable meta to fix deprecation warning
- Remove missing icon references from manifest (only 192/512 PNGs exist)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

manifest.json

@@ -8,48 +8,12 @@
   "theme_color": "#FF5E1A",
   "orientation": "portrait-primary",
   "icons": [
-    {
-      "src": "/assets/icons/icon-72.png",
-      "sizes": "72x72",
-      "type": "image/png",
-      "purpose": "any maskable"
-    },
-    {
-      "src": "/assets/icons/icon-96.png",
-      "sizes": "96x96",
-      "type": "image/png",
-      "purpose": "any maskable"
-    },
-    {
-      "src": "/assets/icons/icon-128.png",
-      "sizes": "128x128",
-      "type": "image/png",
-      "purpose": "any maskable"
-    },
-    {
-      "src": "/assets/icons/icon-144.png",
-      "sizes": "144x144",
-      "type": "image/png",
-      "purpose": "any maskable"
-    },
-    {
-      "src": "/assets/icons/icon-152.png",
-      "sizes": "152x152",
-      "type": "image/png",
-      "purpose": "any maskable"
-    },
     {
       "src": "/assets/icons/icon-192.png",
       "sizes": "192x192",
       "type": "image/png",
       "purpose": "any maskable"
     },
-    {
-      "src": "/assets/icons/icon-384.png",
-      "sizes": "384x384",
-      "type": "image/png",
-      "purpose": "any maskable"
-    },
     {
       "src": "/assets/icons/icon-512.png",
       "sizes": "512x512",
@@ -58,48 +22,6 @@
     }
   ],
   "categories": ["food", "shopping"],
-  "screenshots": [
-    {
-      "src": "/assets/screenshots/home.png",
-      "sizes": "1280x720",
-      "type": "image/png",
-      "form_factor": "wide",
-      "label": "Homepage"
-    },
-    {
-      "src": "/assets/screenshots/shop.png",
-      "sizes": "1280x720",
-      "type": "image/png",
-      "form_factor": "wide",
-      "label": "Shop"
-    }
-  ],
-  "shortcuts": [
-    {
-      "name": "Shop Coffee",
-      "short_name": "Shop",
-      "description": "Browse our coffee selection",
-      "url": "/shop.php",
-      "icons": [
-        {
-          "src": "/assets/icons/shop-icon.png",
-          "sizes": "96x96"
-        }
-      ]
-    },
-    {
-      "name": "My Orders",
-      "short_name": "Orders",
-      "description": "View your orders",
-      "url": "/account/orders.php",
-      "icons": [
-        {
-          "src": "/assets/icons/orders-icon.png",
-          "sizes": "96x96"
-        }
-      ]
-    }
-  ],
   "related_applications": [],
   "prefer_related_applications": false
 }