The sidebar switches between your actual tools (to/note/shop/pre-dooo), each loaded as its own persistent iframe — your place in one is kept while you look at another. Each tool has its own "?" for how that specific tool works; this one only covers dash itself.
The + button captures something without switching tools first — pick a target app, or leave it "unset" and let pre-dooo's classifier work out what it is.
A cross-app AI drawer — ask it things that span more than one tool at once, rather than switching between them yourself.
A new invite starts narrow on purpose: pre-dooo only, and only their own items within it. Widen either — which apps, or how much of each they see — from the admin/access screen per member, whenever you're ready to.