feat(phase-24): integrate MITRE D3FEND defensive techniques with ATT&CK mapping (T-213, T-214)

frontend/src/types/models.ts

@@ -187,3 +187,14 @@ export interface TacticCoverage {
   not_evaluated: number;
   in_progress: number;
 }
+
+// ── D3FEND ────────────────────────────────────────────────────────
+
+export interface DefensiveTechnique {
+  id: string;
+  d3fend_id: string;
+  name: string;
+  description: string | null;
+  tactic: string | null;
+  d3fend_url: string | null;
+}