fix: Remove debug logs & fix favicon for production

- Remove all debug logs (127.0.0.1:7242) that cause errors in production
- Fix site.webmanifest to use existing SVG icons instead of missing PNG files
- Build erfolgreich

client/public/site.webmanifest

@@ -4,14 +4,14 @@
   "description": "AI-powered email sorting for maximum productivity",
   "icons": [
     {
-      "src": "/favicon-192x192.png",
-      "sizes": "192x192",
-      "type": "image/png"
+      "src": "/favicon.svg",
+      "sizes": "any",
+      "type": "image/svg+xml"
     },
     {
-      "src": "/favicon-512x512.png",
-      "sizes": "512x512",
-      "type": "image/png"
+      "src": "/apple-touch-icon.svg",
+      "sizes": "180x180",
+      "type": "image/svg+xml"
     }
   ],
   "theme_color": "#22c55e",