Refactor SteamOS session management and launcher scripts

- Removed obsolete launch_desktop.sh and launch_session.sh scripts.
- Introduced new steam-launcher script to handle Steam launching and session tracking.
- Added steam-short-session-tracker for monitoring short Steam sessions and triggering repairs.
- Created steamos and steamos-session scripts for managing the SteamOS session.
- Implemented steamos-session-select for switching between Gamescope and Plasma sessions.
- Updated SDDM configuration for autologin and session management.
- Added new systemd services and targets for managing Gamescope and Steam sessions.
- Created desktop entries and icons for ALVR and SteamOS shortcuts.
- Enhanced logging and error handling across scripts.
- Cleaned up unused systemd slice and service files.
- Updated Ansible playbook to reflect new configurations and file structures.

ansible/files/game_station/bin/system/launch-kde

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -euo pipefail
+LOGFILE="$HOME/.local/logs/desktop.log"
+export PATH="$HOME/.local/bin:$PATH"
+
+log() { echo "[$(date --iso-8601=seconds)] $*" | tee -a "$LOGFILE"; }
+
+DESKTOP_BIN="$(command -v plasmashell || true)"
+if [ -z "$DESKTOP_BIN" ]; then
+  log "ERROR: plasmashell not found in PATH"
+  exit 127
+fi
+
+export XDG_CURRENT_DESKTOP=plasma
+export XDG_CURRENT_DESKTOP=KDE
+
+export QT_QPA_PLATFORM=wayland
+export GDK_BACKEND=wayland
+export CLUTTER_BACKEND=wayland
+export SDL_VIDEODRIVER=wayland
+export MOZ_ENABLE_WAYLAND=1
+export KDEDIRS=/usr
+export KDE_FULL_SESSION=true
+export DESKTOP_SESSION=plasma
+
+unset DISPLAY
+
+mkdir -p $XDG_RUNTIME_DIR
+chmod 700 $XDG_RUNTIME_DIR
+
+log "Launching Plasma: $DESKTOP_BIN"
+systemd-run --user --scope --quiet \
+  --unit=plasma.scope \
+  --slice=desktop.slice \
+  "$DESKTOP_BIN" >>"$LOGFILE" 2>&1 &
+plasma_scope_pid=$!
+log "Plasma started with scope pid $plasma_scope_pid"
+
+{
+  SUNSHINE_BIN="$(command -v sunshine || true)"
+  if [ -z "$SUNSHINE_BIN" ]; then
+    log "ERROR: sunshine not found in PATH"
+  else
+    SUNSHINE_LOG_FILE="$HOME/.local/logs/sunshine.log"
+    log "Found Sunshine: $SUNSHINE_BIN, starting after 5s delay"
+    sleep 5
+    systemd-run --user --scope --quiet \
+    --unit=sunshine.scope \
+    --slice=sunshine.slice \
+    "$SUNSHINE_BIN" "$HOME/.config/sunshine/sunshine.conf"
+  fi
+} &
+
+wait "$plasma_scope_pid"
+status=$?
+
+# Stop Sunshine gracefully
+if systemctl --user is-active --quiet sunshine.scope; then
+  log "Stopping Sunshine"
+  systemctl --user stop sunshine.scope
+fi
+
+log "Plasma session ended."
+exit "$status"