Update mtdna_backend.py

mtdna_backend.py

@@ -613,6 +613,11 @@ def load_user_usage():
 
         sheet = client.open("user_usage_log").sheet1
         data = sheet.get_all_values()
+        print("data: ", data)
+        print("🧪 Raw header row from sheet:", data[0])
+        print("🧪 Character codes in each header:")
+        for h in data[0]:
+            print([ord(c) for c in h])
 
         if not data or len(data) < 2:
             print("⚠️ Sheet is empty or missing rows.")