fix(coverage): partial coverage when mix of detected+not_detected; add bulk recalculate endpoint

backend/app/routers/system.py

@@ -824,6 +824,38 @@ def re_enrich_evaluation_round(
     return summary
 
 
+@router.post("/recalculate-coverage")
+def recalculate_all_coverage(
+    db: Session = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """Recompute status_global for every technique based on its current tests.
+
+    **Requires** the ``admin`` role.
+    Run this after logic changes to the coverage scoring rules.
+    """
+    from app.models.technique import Technique
+    from app.services.status_service import recalculate_technique_status
+
+    techniques = db.query(Technique).all()
+    updated = 0
+    for tech in techniques:
+        old_status = tech.status_global
+        recalculate_technique_status(db, tech)
+        if tech.status_global != old_status:
+            updated += 1
+    db.commit()
+    logger.info(
+        "Bulk coverage recalculation: %d/%d techniques updated (by %s)",
+        updated, len(techniques), current_user.email,
+    )
+    return {
+        "total": len(techniques),
+        "updated": updated,
+        "message": f"Coverage recalculated for {len(techniques)} techniques. {updated} statuses changed.",
+    }
+
+
 @router.post("/email-test")
 def send_test_email(
     payload: EmailTestRequest,