Proposes consolidating five deployment modes into two:
- Single-User: App password in env vars (trusted environment)
- Multi-User: Login Flow v2 for per-user app password acquisition
Key changes:
- Use Nextcloud Login Flow v2 (NC 16+) for delegated authentication
- Application-level scope enforcement (app passwords have no native scopes)
- MCP elicitation for seamless authorization prompting
- Astrolabe front-end integration for scope management UI
- Clear security posture documentation for administrators
This removes the need for upstream Nextcloud OAuth patches and simplifies
deployment while maintaining security through defense-in-depth.
Related: #521
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
