* Update session-management to solve incorrectly dropped sessions
* Reset the nav on account switch
* Reset the feed on me.load()
* Update tests to reflect new account-switching behavior
* Update the account-create and signin views to use the design system.
Also:
- Add borderDark to the theme
- Start to an account selector in the signin flow
* Dark mode fixes in signin ui
* Track multiple active accounts and provide account-switching UI
* Add test tooling for an in-memory pds
* Add complete integration tests for login and the account switcher
Paul Frazee