feat(reui): update ReUI components and documentation

- Added new OIDC configuration options in `.env.example`.
- Expanded documentation in `AGENTS.md` to include OIDC endpoints and admin UI.
- Updated ReUI skill version and component count from 17 to 20 across various documentation files.
- Enhanced `README.md` and other related files to reflect the new component structure and usage guidelines.

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/docker-compose.traefik.yml

@@ -66,6 +66,8 @@ services:
       JWT_TTL_HOURS: ${JWT_TTL_HOURS:-1}
       REFRESH_TTL_DAYS: ${REFRESH_TTL_DAYS:-14}
       ISSUER: ${ISSUER:-https://auth.shnt.top}
+      OIDC_ISSUER: ${OIDC_ISSUER:-}
+      OIDC_RSA_PRIVATE_KEY: ${OIDC_RSA_PRIVATE_KEY:-}
       ADMIN_EMAIL: ${ADMIN_EMAIL:-admin@shnt.top}
       ADMIN_PASSWORD: ${ADMIN_PASSWORD:?set ADMIN_PASSWORD in .env}
       ADMIN_NAME: ${ADMIN_NAME:-Admin}