Update with available wells count on queue display

app.py

@@ -240,17 +240,20 @@ def update_status_with_queue(R, Y, B):
 def update_queue_display():
     """Refresh queue info for the UI"""
     global current_task, queue_counter
+    num_available_wells = len(find_unused_wells())
     try:
         print(f"[DEBUG] Updating queue display - Counter: {queue_counter}")    
         if current_task:
             status = f"""### Current Queue Status
 - Active experiment: Yes
 - Queue length: {queue_counter+1} experiment(s)
+- Available wells: {num_available_wells} wells
 - Expected wait time to obtain results > {(queue_counter+2)*2} mins """
         else:
             status = f"""### Current Queue Status
 - Active experiment: No
 - Queue length: {queue_counter} experiment(s)
+- Available wells: {num_available_wells} wells
 - Expected wait time to obtain results: 2 mins """
         return status
     except Exception as e: