foolish-bandit polishes Gary's front door

The headline change is honesty about failure. When the document upload or the Review and Draft flows hit a backend that isn't wired up yet, users now see a plain message explaining the feature will work once Gary is connected - instead of a generic retry error that looks like the product is broken.

The rest is small but telling. The main sidebar entry is renamed from "Assistant" to "Ask Gary" so the primary action matches the product's name. The desktop sidebar now remembers whether you left it open or closed. And when developers turn on a flag that skips authentication for local testing, a quiet notice appears on the login pages so nobody mistakes a dev shortcut for real auth.