Add comprehensive documentation including:
- CLAUDE.md for build instructions and environment setup
- project-map.md for directory structure and key file overview
- docs/reference/tools-api.md for detailed tools API and architecture
- session-log.md for tracking development decisions
- updates to plugin tool injection documentation regarding security risks
* refactor: support explicit model list providers
* fix(web): preserve explicit model providers
* fix(web): preserve legacy provider prefixes on model updates
fix(models): normalize explicit provider-prefixed ids
fix(api): preserve legacy model updates across providers
fix(agent): preserve config identity for explicit provider refs
* fix ci