fix(sway): re-apply display layout on config reload, drop resume hook

Real cause of the silent switch back to side-by-side: sway reload
(Super+Shift+c or swaymsg reload) re-evaluates output config and
defaults to all-outputs-enabled-side-by-side, dropping the runtime
positions set by display-toggle.sh.

- sway config: `exec` -> `exec_always` so the saved layout is
  re-applied on every reload, and use `apply` instead of `init` so
  user-chosen layouts (e.g. side-by-side picked deliberately) survive
  reloads. First boot still defaults to laptop-off via the script's
  state-file fallback.
- swayidle.service: drop the after-resume hook -- DPMS resume isn't
  what was breaking the layout, reload was. Less surface area.

2 files changed, 14 insertions, 11 deletions

diff --git a/dot_config/sway/config b/dot_config/sway/config
index 1e2cc5f..73283c9 100644
--- a/dot_config/sway/config
+++ b/dot_config/sway/config
@@ -238,7 +238,7 @@ bindsym $mod+t exec ~/.config/sway/tb-toggle.sh
 # ── Autostart ─────────────────────────────────────────────────────────────────
 exec systemctl --user import-environment DISPLAY WAYLAND_DISPLAY SWAYSOCK XDG_CURRENT_DESKTOP XDG_SESSION_TYPE XDG_SESSION_DESKTOP PASSWORD_STORE_DIR
 exec dbus-update-activation-environment --systemd DISPLAY WAYLAND_DISPLAY SWAYSOCK XDG_CURRENT_DESKTOP XDG_SESSION_TYPE XDG_SESSION_DESKTOP PASSWORD_STORE_DIR
-exec "sleep 2 && ~/.config/sway/display-toggle.sh init"
+exec_always "sleep 2 && ~/.config/sway/display-toggle.sh apply"
 exec systemctl --user start sway-session.target
 exec ~/.config/sway/tb-autostart.sh
 
diff --git a/dot_config/sway/executable_display-toggle.sh b/dot_config/sway/executable_display-toggle.sh
index 66747fb..08481dc 100755
--- a/dot_config/sway/executable_display-toggle.sh
+++ b/dot_config/sway/executable_display-toggle.sh
@@ -1,10 +1,13 @@
 #!/bin/sh
 # Display mode manager: laptop-off ↔ side-by-side.
 #   (no arg)  toggle between modes (F7 / Super+x d).
-#   init      force laptop-off on session start / external plugged in.
-#   apply     re-apply whatever is in the state file (used after resume,
-#             since sway resets output config on wake → both monitors
-#             come back enabled side-by-side regardless of saved state).
+#   apply     re-apply whatever is in the state file. Used by sway's
+#             exec_always at startup and on every config reload (sway
+#             reload re-enables all outputs side-by-side by default;
+#             this restores the user's chosen layout). First boot
+#             defaults to laptop-off when no state file exists.
+#   init      force laptop-off; used by the hotplug watcher when a
+#             newly-plugged external should preempt whatever was saved.
 
 STATE_FILE="${XDG_RUNTIME_DIR:-/tmp}/display-mode"
 
@@ -19,7 +22,7 @@ if [ -z "$EXTERNAL" ]; then
     swaymsg output "$LAPTOP" enable pos 0 0 || true
     echo "laptop-only" >"$STATE_FILE"
   fi
-  [ -z "$1" ] && notify-send "Display" "No external display connected"
+  [ -z "${1:-}" ] && notify-send "Display" "No external display connected"
   exit 0
 fi
 
@@ -28,10 +31,10 @@ fi
 LAPTOP_WIDTH=$(echo "$OUTPUTS" | jq -r ".[] | select(.name == \"$LAPTOP\") | .current_mode.width // .modes[0].width")
 [ -z "$LAPTOP_WIDTH" ] && LAPTOP_WIDTH=1920
 
-if [ "${1:-}" = "init" ]; then
-  NEXT="laptop-off"
-elif [ "${1:-}" = "apply" ]; then
+if [ "${1:-}" = "apply" ]; then
   NEXT=$(cat "$STATE_FILE" 2>/dev/null || echo "laptop-off")
+elif [ "${1:-}" = "init" ]; then
+  NEXT="laptop-off"
 else
   CURRENT=$(cat "$STATE_FILE" 2>/dev/null || echo "laptop-off")
   case "$CURRENT" in
@@ -46,12 +49,12 @@ case "$NEXT" in
     swaymsg output "$EXTERNAL" enable || true
     swaymsg workspace number 1 || true
     echo "laptop-off" >"$STATE_FILE"
-    [ -z "$1" ] && notify-send "Display" "Laptop screen off"
+    [ -z "${1:-}" ] && notify-send "Display" "Laptop screen off"
     ;;
   side-by-side)
     swaymsg output "$LAPTOP" enable pos 0 0 || true
     swaymsg output "$EXTERNAL" enable pos "$LAPTOP_WIDTH" 0 || true
     echo "side-by-side" >"$STATE_FILE"
-    [ -z "$1" ] && notify-send "Display" "Side by side"
+    [ -z "${1:-}" ] && notify-send "Display" "Side by side"
     ;;
 esac