Improve emoji handling and text display in previews and generated images

Refactor emoji removal logic into a shared utility and update dependencies.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Event-Id: 59d8c635-691c-42a3-b368-902e8f16eeee
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/Q6FJ7Lw

package.json

@@ -60,6 +60,7 @@
     "drizzle-orm": "^0.39.1",
     "drizzle-zod": "^0.7.0",
     "embla-carousel-react": "^8.6.0",
+    "emoji-regex": "^10.6.0",
     "express": "^4.21.2",
     "express-session": "^1.18.1",
     "framer-motion": "^11.13.1",