feat: Update launch script and playbook for enhanced Gamescope and NVIDIA support

ansible/files/game_station/bin/system/launch_steam.sh

@@ -55,7 +55,7 @@ export STEAM_GAMESCOPE_COLOR_MANAGED=1
 export STEAM_GAMESCOPE_VIRTUAL_WHITE=1
 
 # Temporary crutch until dummy plane interactions / etc are figured out
-export GAMESCOPE_DISABLE_ASYNC_FLIPS=1
+# export GAMESCOPE_DISABLE_ASYNC_FLIPS=1
 
 # Use Vulkan for the Steam Overlay
 export STEAM_OVERLAY_RENDERER=vk
@@ -67,6 +67,10 @@ export GTK_IM_MODULE=Steam
 export XCURSOR_THEME=steam
 export XCURSOR_SCALE=256
 
+export GAMESCOPE_WSI=0
+export STEAM_USE_PW_CAPTURE=0               # Deck prefers gamescope capture path
+export STEAM_DISABLE_GAMESCOPE_LAUNCH=0     # allow gamescope handling
+
 log() { echo "[$(date --iso-8601=seconds)] $*" | tee -a "$LOGFILE"; }
 
 mkdir -p $XDG_RUNTIME_DIR
@@ -107,7 +111,7 @@ log "Updating steam: /opt/steamcmd/steamcmd.sh +quit"
 }
 
 log "Launching Steam"
-STEAM_ARGS=("-steamdeck" "-steamos3" "-steampal" "-gamepadui" "-pipewire-dmabuf")
+STEAM_ARGS=("-steamdeck" "-steamos3" "-gamepadui")
 systemd-run --user --scope --quiet \
   --unit=steam.scope \
   --slice=steam.slice \