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explainability.py

@@ -353,7 +353,8 @@ class ExplainabilityEngine:
         
         # Point 9: Responsible Display
         confidence = "HIGH" if reliability > 0.6 else "LOW"
-        audit["reliability_score"] = round(reliability, 4)
+        # FIX: JSON Serialization Error (np.float32 -> float)
+        audit["reliability_score"] = round(float(reliability), 4)
         
         # 5. Visualize
         img_np = np.array(image)
@@ -371,7 +372,8 @@ class ExplainabilityEngine:
         return {
             "heatmap_array": visualization,
             "heatmap_raw": final_map,
-            "reliability_score": round(reliability, 2),
+            # FIX: Cast to float for JSON safety
+            "reliability_score": round(float(reliability), 2),
             "confidence_label": confidence,
             "audit": audit,
             "display_text": "Zone d'attention du modèle (Grad-CAM++)"