v0.1.11 — Multi-monitor handling: disable an auxiliary monitor before Gaming Mode

Reported on a Framework Desktop (AMD AI MAX 380) + Gigabyte M27Q +
LG DualUp setup: with both monitors attached, gamescope would either
land on the wrong screen or refuse to start, and writing
OUTPUT_CONNECTOR=DP-X alone wasn't enough to fix it. The workaround
shipped by the user was to manually patch /usr/share/gamescope-session-plus
to disable the other monitor before launching gamescope.

DeckShift now handles this natively, without touching the
gamescope-session-plus script (which is ChimeraOS's, not ours):

- New env var OUTPUT_CONNECTOR_TO_DISABLE (single connector or
  comma list) written to ~/.config/environment.d/gamescope-session-plus.conf
  alongside the other display keys.

- switch-to-gaming reads it and runs `hyprctl keyword monitor X,disable`
  for each listed connector BEFORE the SDDM restart, while Hyprland is
  still alive (hyprctl needs a live IPC socket). The disable is
  runtime-only — Hyprland's static config isn't touched — so when the
  user returns from Gaming Mode the new Hyprland reads its config fresh
  and the monitor comes back automatically. No re-enable step needed.

- Settings TUI exposes this as a "Hide monitor" main-menu item. The
  picker lists every connected monitor EXCEPT the gaming one (so a
  user can't accidentally pick the same connector they just set as
  OUTPUT_CONNECTOR) and includes a "(clear)" entry.

Also fixes a latent bug in v0.1.10's config-path shortening:
${CONF/#$HOME/~} was supposed to render the conf path with ~ but
bash applies tilde-expansion to the replacement side, re-expanding ~
to $HOME and making the substitution a no-op. Escaped as \~ now.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

deckshift.sh

@@ -34,7 +34,7 @@ set -Euo pipefail
 # -u: Treat unset variables as errors (catches typos in variable names)
 # -o pipefail: A pipeline fails if ANY command in it fails, not just the last one
 
-DECKSHIFT_VERSION="0.1.10"
+DECKSHIFT_VERSION="0.1.11"
 
 # Resolve the directory this script lives in so we can find sibling files like
 # bin/deckshift-settings and applications/deckshift-settings.desktop when
@@ -2219,6 +2219,28 @@ notify-send -u normal -t 2000 "Gaming Mode" "Switching to Gaming Mode..." 2>/dev
 pkill -9 gamescope 2>/dev/null || true
 pkill -9 -f gamescope-session 2>/dev/null || true
 sleep 1
+
+# Multi-monitor handling — gamescope-session-plus picks an output by env, but
+# with two monitors connected it sometimes lands on the wrong one (or refuses
+# to start). If OUTPUT_CONNECTOR_TO_DISABLE is set in the user's env conf,
+# disable those connectors via hyprctl while Hyprland is still alive so
+# gamescope only sees the gaming display. The disable is runtime-only (no
+# config edit) so when the user returns from Gaming Mode the new Hyprland
+# reads its static config fresh and the monitor comes back automatically.
+ENV_CONF="$HOME/.config/environment.d/gamescope-session-plus.conf"
+if [[ -f "$ENV_CONF" ]]; then
+  TO_DISABLE=$(awk -F= '$1=="OUTPUT_CONNECTOR_TO_DISABLE" { sub(/^[^=]*=/,""); v=$0 } END { print v }' "$ENV_CONF")
+  if [[ -n "$TO_DISABLE" ]]; then
+    IFS=',' read -ra DISABLE_LIST <<< "$TO_DISABLE"
+    for conn in "${DISABLE_LIST[@]}"; do
+      conn="${conn// /}"
+      [[ -z "$conn" ]] && continue
+      hyprctl keyword monitor "${conn},disable" 2>/dev/null || true
+    done
+    sleep 0.5
+  fi
+fi
+
 sudo -n chvt 2 2>/dev/null || true
 sleep 0.3
 sudo -n systemctl restart sddm