feat(iace): "Neu initialisieren" Button + DeleteHazard

- POST /initialize?force=true loescht bestehende Hazards + Mitigations
  und erstellt sie neu mit aktuellen Betriebszustaenden
- Orange "Neu initialisieren" Button auf Interview-Seite (mit Confirm-Dialog)
- DeleteHazard Store-Methode (kaskadiert Risk Assessments)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-compliance/app/sdk/iace/[projectId]/interview/page.tsx

@@ -236,6 +236,47 @@ export default function IACEInterviewPage() {
               </>
             )}
           </button>
+          <button
+            disabled={initStatus === 'running' || completionPct < 30}
+            onClick={async () => {
+              if (!confirm('Alle bestehenden Gefaehrdungen und Massnahmen loeschen und neu erstellen?')) return
+              if (saveTimerRef.current) {
+                clearTimeout(saveTimerRef.current)
+                await saveToBackend(latestFormRef.current)
+              }
+              setInitStatus('running')
+              setInitResult(null)
+              try {
+                const res = await fetch(`/api/sdk/v1/iace/projects/${projectId}/initialize?force=true`, { method: 'POST' })
+                if (!res.ok) {
+                  const err = await res.json().catch(() => ({}))
+                  alert(err.error || 'Neu-Initialisierung fehlgeschlagen')
+                  setInitStatus('error')
+                  return
+                }
+                const data = await res.json()
+                setInitResult(data)
+                setInitStatus('done')
+              } catch {
+                setInitStatus('error')
+              }
+            }}
+            className="flex items-center gap-2 px-4 py-2 bg-orange-600 text-white rounded-lg hover:bg-orange-700 text-xs font-medium transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
+          >
+            {initStatus === 'running' ? (
+              <>
+                <span className="animate-spin inline-block w-3.5 h-3.5 border-2 border-white border-t-transparent rounded-full" />
+                Laeuft...
+              </>
+            ) : (
+              <>
+                <svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
+                </svg>
+                Neu initialisieren
+              </>
+            )}
+          </button>
           <button
             onClick={() => {
               if (saveTimerRef.current) {

ai-compliance-sdk/internal/api/handlers/iace_handler_init.go

@@ -42,8 +42,29 @@ func (h *IACEHandler) InitializeProject(c *gin.Context) {
 		return
 	}
 
+	// Support ?force=true to clear existing hazards + mitigations before re-init
+	forceReinit := c.Query("force") == "true"
+
 	steps := make([]InitStep, 0, 6)
 
+	// ── Step 0 (optional): Clear existing data for force re-init ──
+	if forceReinit {
+		cleared := 0
+		if mits, _ := h.store.ListMitigationsByProject(ctx, projectID); len(mits) > 0 {
+			for _, m := range mits {
+				_ = h.store.DeleteMitigation(ctx, m.ID)
+				cleared++
+			}
+		}
+		if hazards, _ := h.store.ListHazards(ctx, projectID); len(hazards) > 0 {
+			for _, hz := range hazards {
+				_ = h.store.DeleteHazard(ctx, hz.ID)
+				cleared++
+			}
+		}
+		steps = append(steps, InitStep{Name: "Alte Daten geloescht", Status: "done", Count: cleared})
+	}
+
 	// ── Step 1: Extract narrative from limits_form ──
 	narrativeText := extractNarrativeFromMetadata(project.Metadata)
 	if narrativeText == "" {

ai-compliance-sdk/internal/iace/store_hazards.go

@@ -199,6 +199,19 @@ func (s *Store) UpdateHazard(ctx context.Context, id uuid.UUID, updates map[stri
 	return s.GetHazard(ctx, id)
 }
 
+// DeleteHazard removes a hazard and its risk assessments.
+func (s *Store) DeleteHazard(ctx context.Context, id uuid.UUID) error {
+	_, err := s.pool.Exec(ctx, `DELETE FROM iace_risk_assessments WHERE hazard_id = $1`, id)
+	if err != nil {
+		return fmt.Errorf("delete hazard assessments: %w", err)
+	}
+	_, err = s.pool.Exec(ctx, `DELETE FROM iace_hazards WHERE id = $1`, id)
+	if err != nil {
+		return fmt.Errorf("delete hazard: %w", err)
+	}
+	return nil
+}
+
 // ============================================================================
 // Risk Assessment Operations
 // ============================================================================