- Migrate core services to store Arc<AppState> and use locks
- Centralize state in AppState with Arc-wrapped managers
- Update handlers to pass Arc<AppState> via web::Data
- Add Default for AppState and initialize components in main
- Update debug.json program path from gbserver to botserver
- Load index.html from web/index.html instead of templates/static
- Initialize OpenAIClient with an empty key and local endpoint
- Remove the old static/index.html file
