feat(intel): major intel scan improvements + Review Queue integration

Backend:
- intel_service: remove 50-technique limit (scan all techniques), improve
  pattern matching with word boundaries (\bT1059\b), raise min name length
  to 8 chars to reduce false positives, skip entries with empty titles
- technique_query_service: add intel_items to get_technique_detail() so
  the technique page now shows recent threat intel articles (last 20)
- New GET /intel/items endpoint with optional technique_id filter

Frontend:
- New api/intel.ts with listIntelItems()
- ReviewQueuePage: complete redesign
    * Expandable rows — click a technique to see its intel articles inline
    * IntelPanel component fetches articles per technique on expand
    * 'Create Template from Intel' button opens pre-filled modal:
      name (from article title), source_url (article link), technique_id
      User reads the article and fills the attack procedure
    * Updated explanation text: lists all 3 reasons a technique can be flagged
      (MITRE update / intel scan / new template or detection rule)

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

backend/app/services/technique_query_service.py

@@ -6,6 +6,7 @@ from sqlalchemy.orm import Session, joinedload
 from app.domain.errors import EntityNotFoundError
 from app.models.technique import Technique
 from app.models.detection_rule import DetectionRule
+from app.models.intel import IntelItem
 from app.services.d3fend_import_service import get_defenses_for_technique
 
 # Severity sort order for detection rules (most critical first)
@@ -25,6 +26,15 @@ def get_technique_detail(db: Session, mitre_id: str) -> dict:
 
     defenses = get_defenses_for_technique(db, technique.id)
 
+    # Recent intel items for this technique (newest 20)
+    intel_items = (
+        db.query(IntelItem)
+        .filter(IntelItem.technique_id == technique.id)
+        .order_by(IntelItem.detected_at.desc())
+        .limit(20)
+        .all()
+    )
+
     detection_rules = (
         db.query(DetectionRule)
         .filter(
@@ -79,4 +89,15 @@ def get_technique_detail(db: Session, mitre_id: str) -> dict:
             for r in detection_rules
         ],
         "d3fend_defenses": defenses,
+        "intel_items": [
+            {
+                "id": str(item.id),
+                "url": item.url,
+                "title": item.title,
+                "source": item.source,
+                "detected_at": item.detected_at.isoformat() if item.detected_at else None,
+                "reviewed": item.reviewed,
+            }
+            for item in intel_items
+        ],
     }