Retire app/presenters in favor of Draper decorators

[compwron]

Problem

The codebase has two parallel abstractions for view-layer logic:

• 15 Draper decorators in app/decorators/ — the dominant pattern.
• 2 presenters in app/presenters/ (BasePresenter, CaseContactPresenter).

BasePresenter (app/presenters/base_presenter.rb) just wraps current_user, current_organization, and policy_scope — all things decorators can already access via the h helper or by accepting them as arguments.

Only one usage exists: app/controllers/concerns/loads_case_contacts.rb:24 instantiates CaseContactPresenter.

Maintaining two abstractions for the same job creates choice paralysis for new contributors and a small amount of cognitive overhead reading the codebase.

Proposal

1. Move the logic in CaseContactPresenter (the casa_cases lookup + display_case_number + boolean_select_options) into either:
   • A CaseContactDecorator collection method, or
   • A small query object under app/queries/ if it belongs upstream of the view.
2. Update app/controllers/concerns/loads_case_contacts.rb to consume the new home.
3. Delete app/presenters/ and the corresponding spec/presenters/ directory (the existing base_presenter_spec.rb is a generator stub anyway).
4. Remove spec/presenters from spec/.prosopite_ignore.

Acceptance criteria

• app/presenters/ deleted.
• No references to BasePresenter or CaseContactPresenter remain (grep -r Presenter app/).
• All existing case-contact views render the same content.
• Tests still pass.