Fix UnboundLocalError by removing duplicate os import

app.py

@@ -21,7 +21,6 @@ def main():
     os.makedirs("templates", exist_ok=True)
     
     # Debug: Check current directory and files
-    import os
     print(f"🔍 Current working directory: {os.getcwd()}")
     print(f"🔍 Files in current directory: {os.listdir('.')}")