Harden HDMI recovery and add tested user installer release tooling

scripts/uninstall.sh

@@ -1,24 +1,28 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+if (( EUID == 0 )); then
+    printf 'Run as the desktop user, without sudo.\n' >&2
+    exit 1
+fi
 BIN_DIR="$HOME/.local/bin"
-SYSTEMD_DIR="$HOME/.config/systemd/user"
-
-systemctl --user disable --now revive-monitor-drm-watch.service 2>/dev/null || true
-
-rm -f "$SYSTEMD_DIR/revive-monitor-drm-watch.service"
-rm -f "$BIN_DIR/revive-monitor-fix"
-rm -f "$BIN_DIR/revive-monitor-drm-watch"
+SYSTEMD_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/systemd/user"
+LIB_DIR="$HOME/.local/lib/hyprland-hdmi-revive"
+SERVICE=revive-monitor-drm-watch.service
 
+[[ "$SYSTEMD_DIR" == /* ]] || { printf 'XDG_CONFIG_HOME must be absolute\n' >&2; exit 1; }
+systemctl --user show-environment >/dev/null
+# Stop must succeed before removing a running service's files.
+if systemctl --user cat "$SERVICE" >/dev/null 2>&1; then
+    systemctl --user disable --now "$SERVICE"
+fi
+rm -f -- "$SYSTEMD_DIR/$SERVICE" "$BIN_DIR/revive-monitor-fix" "$BIN_DIR/revive-monitor-drm-watch" "$LIB_DIR/common.sh"
+rmdir -- "$LIB_DIR" 2>/dev/null || true
 systemctl --user daemon-reload
-systemctl --user reset-failed
-
+# Never reset failure information for unrelated user services.
+systemctl --user reset-failed "$SERVICE" 2>/dev/null || true
 cat <<'MSG'
 Removed the user service and installed scripts.
-
-Not removed automatically:
-  ~/.config/revive-monitor/config.env
-  /etc/sudoers.d/revive-monitor-chvt
-
-Remove those manually if you no longer need them.
+Preserved config.env and /etc/sudoers.d/revive-monitor-chvt.
+Remove the Hyprland startup hook and sudoers entry manually if no longer needed.
 MSG