feat(branding): add high-res logo emblem, multi-platform favicon suite, and Open Graph social sharing card

manifest.json

@@ -9,9 +9,22 @@
   "theme_color": "#07090e",
   "icons": [
     {
-      "src": "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Crect width='100' height='100' rx='20' fill='%2307090e'/%3E%3Ccircle cx='50' cy='50' r='38' fill='%23ef4444' opacity='0.25'/%3E%3Ccircle cx='50' cy='50' r='20' fill='%23ef4444'/%3E%3Ccircle cx='50' cy='50' r='8' fill='%23ffffff'/%3E%3C/svg%3E",
-      "sizes": "192x192 512x512",
-      "type": "image/svg+xml"
+      "src": "favicon.svg",
+      "sizes": "any",
+      "type": "image/svg+xml",
+      "purpose": "any"
+    },
+    {
+      "src": "icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
     }
   ]
 }