Add support for iOS app icons and PWA favicons

Updates `client/index.html` and `client/public/manifest.json` to include proper iOS icon links and specifies PNG format for favicons. Enhances the `/api/favicon` endpoint to generate PNG favicons using `sharp` for various sizes and includes the "go4" text for larger icons. Also adds `@types/compression` to `package.json` and `package-lock.json`.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ab9cd02a-d0b2-4288-9ceb-1964d0059648
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/ab9cd02a-d0b2-4288-9ceb-1964d0059648/mbX83Mu

package.json

@@ -45,6 +45,7 @@
     "@radix-ui/react-tooltip": "^1.2.0",
     "@tanstack/react-query": "^5.60.5",
     "@types/bcryptjs": "^2.4.6",
+    "@types/compression": "^1.8.1",
     "@types/memoizee": "^0.4.12",
     "@types/multer": "^2.0.0",
     "@types/node-fetch": "^2.6.13",