feat: add uninstall script to cleanly remove kiosk system integrations

scripts/uninstall.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+# Removes all walldash system integrations installed by setup-systemd.sh and setup-kiosk.sh.
+# Does NOT delete the project directory itself.
+
+set -e
+
+SERVICE_NAME="walldash"
+USER_NAME=$(whoami)
+
+# Stop and remove the systemd service
+if systemctl list-unit-files "${SERVICE_NAME}.service" &>/dev/null; then
+    echo "Stopping and disabling ${SERVICE_NAME} service..."
+    sudo systemctl stop "${SERVICE_NAME}.service" 2>/dev/null || true
+    sudo systemctl disable "${SERVICE_NAME}.service" 2>/dev/null || true
+    sudo rm -f "/etc/systemd/system/${SERVICE_NAME}.service"
+    sudo systemctl daemon-reload
+    echo "Systemd service removed."
+else
+    echo "No systemd service found for ${SERVICE_NAME}, skipping."
+fi
+
+# Remove the kiosk autostart entry
+DESKTOP_FILE="/home/${USER_NAME}/.config/autostart/walldash-kiosk.desktop"
+if [ -f "$DESKTOP_FILE" ]; then
+    rm -f "$DESKTOP_FILE"
+    echo "Autostart entry removed: $DESKTOP_FILE"
+else
+    echo "No autostart entry found, skipping."
+fi
+
+# Undo screen blanking changes in LXDE autostart
+LXDE_AUTOSTART="/etc/xdg/lxsession/LXDE-pi/autostart"
+if [ -f "$LXDE_AUTOSTART" ]; then
+    sudo sed -i '/^@xset s off$/d'    "$LXDE_AUTOSTART"
+    sudo sed -i '/^@xset -dpms$/d'   "$LXDE_AUTOSTART"
+    sudo sed -i '/^@xset s noblank$/d' "$LXDE_AUTOSTART"
+    sudo sed -i 's/^# @xscreensaver/@xscreensaver/' "$LXDE_AUTOSTART"
+    echo "LXDE autostart screen-blanking settings restored."
+fi
+
+echo ""
+echo "Uninstall complete. The project directory has not been touched."
+echo "You can safely delete it manually if no longer needed."