- Add areaId field to Internacion type and database schema
- Add area selection in NuevoIngreso, EditIngreso, and Internaciones forms
- Filter out 'Fuera de area' from area selection dropdowns
- Add permission controls for users to only edit internaciones in their area
- Add canEdit check to hide 'Editar Ingreso' button in HistoriaClinica
- Fix getInternacionAreaId to use new areaId field first, fallback to cama area
- Add INSERT OR IGNORE to prevent duplicate errors