Hyper docs

compaction: summarize large idle conversations before the cache expires by @kanyesthaker in #1658
chat: remember the model pick for each provider by @kanyesthaker in #1649
settings: dotted paper behind the whole settings and search screens by @shalins in #1664
email: send campaign replies to founders by @kanyesthaker in #1650
keyboard: keep the hyper menu open on the way down by @shalins in #1666
website: hold the page still while a known powers screen is up by @shalins in #1663
settings: sidebar rows stay still when clicked, like the home sidebar by @shalins in #1669