fix(systemd): set Restart=always and PUBSCRIPT_WEB_DIST in user service and force-restart on .deb install

desktop/build-deb.sh

@@ -148,9 +148,10 @@ fi
 if command -v gtk-update-icon-cache >/dev/null 2>&1; then
   gtk-update-icon-cache -q -t -f /usr/share/icons/hicolor || true
 fi
-# Stop any stale background server from a previous package build so the next
-# launch or systemd restart serves the updated /opt/pubscript bundle cleanly.
-pkill -f "/opt/pubscript/server/dist/server.mjs" >/dev/null 2>&1 || true
+# Stop any stale background server from a previous package build so systemd
+# (Restart=on-failure / Restart=always) or the next desktop launch starts the
+# freshly installed /opt/pubscript server and asset bundle.
+pkill -9 -f "/opt/pubscript/server/dist/server.mjs" >/dev/null 2>&1 || true
 exit 0
 EOF
 chmod 0755 "$STAGE_DIR/DEBIAN/postinst"