Issue #3: The frontend Permission enum was manually duplicated from
the backend. While full generation isn't practical, this change
ties the frontend constants to the generated OpenAPI types for
compile-time validation.
Changes:
- Update ConstantsResponse schema to use actual Permission/InviteStatus
enums (enables OpenAPI to include enum values)
- Import enums in schemas.py (no circular dependency issue)
- Update auth-context.tsx to derive PermissionType from generated schema
- Update meta route to return enum instances instead of string values
- Permission values are now type-checked against the OpenAPI schema
If a permission is added to the backend but not to the frontend's
Permission object, TypeScript will fail to compile. This provides
a safety net without requiring a complex build-time generation step.