Cross-check HIS against hyprctl instances (dir can linger)

The previous check trusted $XDG_RUNTIME_DIR/hypr/$HIS/ existing, but the
directory and its socket files can remain on disk after the session dies.
On a real run the stale signature still had a dir, so the guard passed
and hyprctl silently failed again.

ensure_hyprland_env now queries `hyprctl instances` — the source of truth
for live sessions — and rewrites HIS if ours isn't in the list. Watcher
mirrors the same logic.

Also: drop the outdated "zenity" mention from the installer header.

motion-wallpaper-toggle

@@ -182,29 +182,34 @@ show_header() {
 # ===== selection ==============================================================
 
 ensure_hyprland_env() {
-  # The TUI can be launched from contexts whose env doesn't carry a valid
-  # HYPRLAND_INSTANCE_SIGNATURE. Two failure modes:
-  #   1) HIS unset (fresh login shell from a non-graphical context)
-  #   2) HIS set but STALE — points to a previous Hyprland session whose
-  #      socket no longer exists (seen when Walker's env carries the
-  #      signature from an earlier login). The second case is silent but
-  #      equally broken: hyprctl dumps a plain-text error on stdout.
-  # `hyprctl instances` always reports the *live* signatures, so recover
-  # from that. Leave HIS unchanged if we can't find a live instance.
+  # The TUI can be launched from contexts whose HYPRLAND_INSTANCE_SIGNATURE
+  # isn't usable. Three failure modes, all silent:
+  #   1) HIS unset (fresh login shell, cron, ssh).
+  #   2) HIS set but points to a dead session — the `hypr/<sig>/` directory
+  #      and its socket files can linger on disk after the Hyprland process
+  #      exits, so a dir-exists check is not enough.
+  #   3) Walker's env retained an old HIS across a Hyprland restart.
+  # `hyprctl instances` is the source of truth: it only reports live
+  # instances. Always cross-check against it and rewrite HIS if ours isn't
+  # in the list.
   local his="${HYPRLAND_INSTANCE_SIGNATURE:-}"
-  if [ -n "$his" ] && [ -d "$RUNTIME_DIR/hypr/$his" ]; then
+  local live
+  live="$(hyprctl instances 2>/dev/null | awk '/^instance /{sub(/:$/,"",$2); print $2}')"
+  if [ -z "$live" ]; then
+    # No live Hyprland — nothing we can do, let the caller surface an error.
+    return 0
+  fi
+  if [ -n "$his" ] && printf '%s\n' "$live" | grep -qxF "$his"; then
     return 0
   fi
   local sig
-  sig="$(hyprctl instances 2>/dev/null | awk '/^instance /{sub(/:$/,"",$2); print $2; exit}')"
-  if [ -n "$sig" ] && [ "$sig" != "$his" ]; then
+  sig="$(printf '%s\n' "$live" | head -n 1)"
   export HYPRLAND_INSTANCE_SIGNATURE="$sig"
   if [ -n "$his" ]; then
     log "replaced stale HYPRLAND_INSTANCE_SIGNATURE ($his → $sig)"
   else
     log "recovered HYPRLAND_INSTANCE_SIGNATURE=$sig from hyprctl instances"
   fi
-  fi
 }
 
 get_monitors() {

motion-wallpaper-watcher

@@ -21,17 +21,17 @@ log() {
 }
 
 his="${HYPRLAND_INSTANCE_SIGNATURE:-}"
-if [ -z "$his" ] || [ ! -d "$RUNTIME_DIR/hypr/$his" ]; then
-  # HIS is missing or stale (points to a dead session). Recover from the
-  # live signature reported by `hyprctl instances`.
-  sig="$(hyprctl instances 2>/dev/null | awk '/^instance /{sub(/:$/,"",$2); print $2; exit}')"
-  if [ -n "$sig" ]; then
+# Cross-check against `hyprctl instances` — the socket dir alone can linger
+# on disk after a session dies, so a dir-exists check isn't reliable.
+live="$(hyprctl instances 2>/dev/null | awk '/^instance /{sub(/:$/,"",$2); print $2}')"
+if [ -z "$live" ]; then
+  log "no live Hyprland instance reported by hyprctl — exiting"
+  exit 0
+fi
+if [ -z "$his" ] || ! printf '%s\n' "$live" | grep -qxF "$his"; then
+  sig="$(printf '%s\n' "$live" | head -n 1)"
   export HYPRLAND_INSTANCE_SIGNATURE="$sig"
   log "using HYPRLAND_INSTANCE_SIGNATURE=$sig (was: ${his:-unset})"
-  else
-    log "HYPRLAND_INSTANCE_SIGNATURE not usable and no live instance found — exiting"
-    exit 0
-  fi
 fi
 
 HYPR_SOCK="$RUNTIME_DIR/hypr/$HYPRLAND_INSTANCE_SIGNATURE/.socket2.sock"

wallpaper.sh

@@ -3,14 +3,15 @@
 # Motion Wallpaper Installer for Omarchy / Hyprland
 #
 # Installs:
-#   ~/.local/bin/motion-wallpaper-toggle             runtime script
+#   ~/.local/bin/motion-wallpaper-toggle              runtime TUI
+#   ~/.local/bin/motion-wallpaper-watcher             auto-pause watcher
 #   ~/.local/share/applications/motion-wallpaper-toggle.desktop   app entry
+#   ~/.local/share/icons/hicolor/scalable/apps/motion-wallpaper.svg   icon
 #   ~/.config/systemd/user/motion-wallpaper.service   optional autostart unit
 #
 # Dependencies:
-#   mpv, jq, zenity (pacman)
+#   mpv, jq, gum, socat, libnotify (pacman)
 #   mpvpaper (AUR, via yay or paru)
-#   libnotify (pacman) — optional, for notify-send
 # ==============================================================================
 
 set -euo pipefail