# Fix: Hospital select not visible on /config/users/create/

## Problem
The `HospitalFieldMixin` in `apps/core/form_mixins.py:44` sets `hospital_field.widget = forms.HiddenInput()`, hiding the hospital field. This mixin is designed for forms where hospital is auto-set from user context, but for user creation we need a visible dropdown.

## Fix
Remove `HospitalFieldMixin` from `UserCreateForm` and `UserEditForm` in `apps/accounts/forms.py`. Keep `DepartmentFieldMixin` for department filtering.

The forms already define `hospital` as a `ModelChoiceField` with a `Select` widget — removing the mixin will let it render normally.

## Files to modify
- `apps/accounts/forms.py` — Remove `HospitalFieldMixin` from both form classes, adjust `__init__` to not pop `request`/`user` kwargs (since `HospitalFieldMixin` no longer handles that)

## Verification
- Navigate to `/config/users/create/` — hospital dropdown should be visible
- PX Admin sees all active hospitals
- Hospital Admin sees only their hospital (can pre-set it in the view)