We use the event_notes.view endpoint right now which just prints the note without any UI around it. This doesn't look amazing.

For meetings we could redirect to a new URL fragment (similar to what we use for session/contribution/subcontribution permalinks, just with a -note appended) which should then automatically expand that note (probably w/ JavaScript).

For conferences I would keep the current behavior as they do not have notes (unless someone created them before changing the type to conference).

Note that the event_notes.view endpoint itself needs to be left intact since this is also used for note permalinks. We could include some new query string arg like from_search=1 which triggers the redirect, or just add a new endpoint that only redirects.