Update server/aiService.ts to use the gpt-4o model, adjust max_tokens, and add temperature for AI-generated descriptions. Replit-Commit-Author: Agent Replit-Commit-Session-Id: 170e18f0-0f13-4eca-8643-546bba1dd8cc Replit-Commit-Checkpoint-Type: full_checkpoint Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/170e18f0-0f13-4eca-8643-546bba1dd8cc/LY6xmBI