Retractable screen-needs repair (Maple Leaf / Northgate)

Retractable screen door for front door. Hardware works fine, screen could be straightened out to use for a few more years, or if you're feeling handy take it apart and replace the screen. A bit tattered at the very bottom where dogs have pushed under it. Would fix it here, but we have a bulldog who either can't see it or refuses to acknowledge its existence. Can either do gate pickup or coordinated if you want to see how it's attached and works, can take it down when you're here. In a 36x81"space, I believe it can be trimmed down but would take some effort