Add case-insensitive name deduplication (cat = Cat = CAT)

handler.py

@@ -154,19 +154,20 @@ class EndpointHandler:
         with self._lock:
             # Get ALL existing IDs and names from current state
             known_ids = set(getattr(self, "class_ids", []))
-            known_names = set(getattr(self, "class_names", []))
+            # Create lowercase set for case-insensitive comparison
+            known_names_lower = set(name.lower() for name in getattr(self, "class_names", []))
             
-            # Filter items, checking against both ID and name
+            # Filter items, checking against both ID and name (case-insensitive)
             batch = []
             for it in new_items:
                 item_id = int(it.get("id"))
                 item_name = it.get("name")
                 
-                # Skip if either ID or name already exists
+                # Skip if either ID or name already exists (case-insensitive for names)
                 if item_id in known_ids:
                     continue  # Skip duplicate ID
-                elif item_name in known_names:
-                    continue  # Skip duplicate name
+                elif item_name.lower() in known_names_lower:
+                    continue  # Skip duplicate name (case-insensitive)
                 else:
                     batch.append(it)