Refactor codebase

app/config.py

@@ -1,8 +1,12 @@
 import os
+from datetime import timezone, timedelta
 from dotenv import load_dotenv
 
 load_dotenv()
 
+# Application-wide timezone for display formatting
+SYDNEY_TZ = timezone(timedelta(hours=11))
+
 
 class Config:
     DATABASE_URL = os.environ.get("DATABASE_URL")