- Remove API token system entirely (model, migration, middleware)
- Add migration 007 to drop api_tokens table
- Add POST /api/v1/login endpoint for JSON credential auth
- API routes now use session cookies (same as web UI)
- Remove /api/v1/tokens endpoint
- HandleAPIWhoAmI uses session auth instead of token context
- APISessionAuth middleware returns JSON 401 instead of redirect
- Update all API tests to use cookie-based authentication
Addresses review comment on PR #74.
