* master: (39 commits)
  prevent changing team in imminent battle - maybe fixes lichess-org#14736
  scala tweaks while reading tournament code
  tweak RelayRound scala code
  don't even process the message if tv chan key doesn't match
  add TvSelect.chanKey instead of reading into the json data
  we never use Map.apply, only Map.get
  scala tweaks while reviewing
  allow the mobile app up to 3 concurrent data streams
  refactor controllers with LilaController.meOrFetch
  look at ip reputation for some anon requests
  New Crowdin updates (lichess-org#14727)
  dedup stockfish name in ui/
  fishnet updated to sf 16.1
  Update sbt to 1.9.9
  hide overflow for odd coach-widgets too
  scala fmt
  hide overflow
  Update JSON response format for PGN push
  fix mod log for blog rank tweaks
  fix broadcast player fide guess from name+title
  ...

UserId must be lowercase, and UserStr.id takes care of that.
It's the very reason why the 2 types are distinct.
UserStr are usernames coming from the outside world, their casing is unpredictable.
With _.id we convert them into UserId which we know are lowercase proper ids.