Big Picture shares the plain `steam` WM_CLASS, so it opened on whatever
monitor the cursor was on rather than the streamed one; match its title
instead and pin to ws3 (DP-1's persistent workspace, what the stream
captures). Move the steam_app_ game rule from ws6 to ws3 too so games and
Big Picture share one streamed workspace and launching a game doesn't flip
DP-1 to a different workspace.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Miguel Palhas
923b884eff