Restore Draft Discovery and Define Draft Ownership

Seed used to have a Drafts page that listed all local document and comment drafts. We removed access to that page when document drafts moved into the normal document routes. As a result, users now have no single place to find all of their unfinished work. The first proposal was to restore the page from the account menu and filter it by the currently selected account. That sounds consistent with an account menu, but the current data model cannot support it reliably: A user creates a draft with Account A, selects Account B: The draft might disappears from the page. Solution