fix: auto-detect kill chain phase when adding tests to custom campaigns

backend/app/routers/campaigns.py

@@ -24,6 +24,7 @@ from app.services.campaign_service import (
     validate_no_circular_dependency,
     get_campaign_progress,
     generate_campaign_from_threat_actor,
+    TACTIC_TO_PHASE,
 )
 from app.services.campaign_scheduler_service import calculate_next_run
 from app.services.notification_service import create_notification
@@ -331,13 +332,20 @@ def add_test_to_campaign(
     if depends_on:
         validate_no_circular_dependency(db, uuid.UUID(campaign_id), ct_id, depends_on)
 
+    # Auto-detect kill chain phase from the test's technique tactic if not provided
+    phase = payload.phase
+    if not phase and test.technique_id:
+        technique = db.query(Technique).filter(Technique.id == test.technique_id).first()
+        if technique and technique.tactic:
+            phase = TACTIC_TO_PHASE.get(technique.tactic, None)
+
     campaign_test = CampaignTest(
         id=ct_id,
         campaign_id=campaign_id,
         test_id=payload.test_id,
         order_index=order_index,
         depends_on=depends_on,
-        phase=payload.phase,
+        phase=phase,
     )
     db.add(campaign_test)
     db.commit()