Add functionality to save and organize AI assistant responses

Update replit.md to include `savedAiResponses` in planSteps and describe AI response saving/organization features.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 1ff249d8-b471-4db3-ab6a-ebef3a02e2a9
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/6bcbd17a-d2f9-4c25-b5f5-8b3a559e8000/1ff249d8-b471-4db3-ab6a-ebef3a02e2a9/0lzI2Wy
