Update app_main.py

app_main.py

@@ -373,7 +373,14 @@ def similarity_matching(input_json_path: str) -> str:
     img_matrix = np.array([img["embeddings"] for img in embedding_json])
     sprite_matrix = np.array(sprite_features)
     
-    similarity = np.matmul(sprite_matrix, img_matrix.T)
+    try:
+        similarity = np.matmul(sprite_matrix, img_matrix.T)
+    except ValueError as ve:
+        if "matmul" in str(ve) and "size" in str(ve):
+            logger.error("❌ Matrix multiplication failed due to shape mismatch. Likely due to empty or invalid embeddings.")
+            raise RuntimeError("Matrix shape mismatch: CLIP embedding input is invalid or empty.")
+        else:
+            raise
     most_similar_indices = np.argmax(similarity, axis=1)
 
     # ============= Match and copy ================