An application that received an offer can never be marked rejected

Declining an offer is one of the most common, completely normal endings to a job search -- a candidate accepts a different role, negotiates and walks away, or just changes their mind. Right now, the tracker has no legal way to record that: once an application reaches offer, it is permanently stuck there. Every user who reaches this point -- arguably the most important milestone the whole app exists to track -- hits a dead end exactly when they're closest to being done, and their application history is permanently wrong: it'll say "offer" forever even after they've told everyone they turned it down.

ALLOWED_TRANSITIONS maps STATUS_OFFER to an empty set, so no outgoing transition from offer is considered legal -- including the very common offer -> rejected.

python manage.py shell -c " from django.contrib.auth import get_user_model from applications.models import Application u = get_user_model().objects.create_user(username='t4demo', password='pw-t4demo-123') app = Application.objects.create(user=u, company='Acme', role='Engineer') app.apply_transition(Application.STATUS_INTERVIEW) app.apply_transition(Application.STATUS_OFFER) app.apply_transition(Application.STATUS_REJECTED) "

-> ValueError: Cannot transition from 'offer' to 'rejected'.

ALLOWED_TRANSITIONS is the single source of truth both the model (Application.apply_transition) and the API (StatusTransitionSerializer.validate_status) consult, so this one-line gap blocks the transition everywhere at once, with a clean, "working as coded" 400 rather than a crash. That's exactly why it's easy to miss: nothing errors, nothing looks broken in isolation, it's just a business rule that was encoded with an empty set where a real target status belongs.

Look at the shape of the other three entries in ALLOWED_TRANSITIONS -- each of applied and interview already allows transitioning to rejected -- and decide what offer's entry should look like by the same pattern. rejected itself intentionally stays terminal (an empty set); don't change that one.