Introduce feature gating for unregistered users.

User Story

As an unregistered visitor
I want to be restricted from accessing core features like job search
So that the platform encourages me to register and protects its data

Acceptance Criteria (GIVEN / WHEN / THEN)

• GIVEN a user is not logged in
  WHEN they try to access the job search page
  THEN they are redirected to the registration or login page

• GIVEN a user is logged in
  WHEN they access the job search page
  THEN they can view and use it normally