fix: 4 improvements — campaign test deletion, review queue triggers, technique link, Jira read-only

1. Campaign test deletion: removing a test from a campaign now also
   deletes the underlying Test record and recalculates technique status.

2. Review Queue triggers: review_required=True is now also set when
   - Sigma/Elastic detection rules are imported for a technique
   - A test is validated (coverage status changes)

3. Test detail — Technique link: 'Technique' entry added at the top of
   the Details sidebar showing MITRE ID + name as a clickable link to
   /techniques/{mitre_id}.

4. Jira panel — read-only on test page: added readOnly + label props to
   JiraLinkPanel. TestDetailPage now passes readOnly=true and the test
   name as label, hiding Link Issue / Sync / Unlink controls (automatic
   Jira creation only — no manual management).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/services/sigma_import_service.py

@@ -37,6 +37,7 @@ from sqlalchemy.orm import Session
 
 from app.models.detection_rule import DetectionRule
 from app.models.data_source import DataSource
+from app.models.technique import Technique
 from app.services.audit_service import log_action
 
 logger = logging.getLogger(__name__)
@@ -288,6 +289,7 @@ def sync(db: Session) -> dict:
 
     created = 0
     skipped = 0
+    new_technique_ids: set[str] = set()
 
     for item in parsed_rules:
         # Dedup key: source_id (relative path). A rule file may produce
@@ -316,8 +318,15 @@ def sync(db: Session) -> dict:
         )
         db.add(rule)
         existing_ids.add(item["source_id"])
+        new_technique_ids.add(item["mitre_technique_id"])
         created += 1
 
+    # Flag techniques that received new rules for review
+    if new_technique_ids:
+        db.query(Technique).filter(
+            Technique.mitre_id.in_(new_technique_ids)
+        ).update({"review_required": True}, synchronize_session=False)
+
     db.commit()
 
     summary = {