Add MQTT handover controller and systemd installer

install.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Zorruno — MeshCore Phone App Mode v1.0 — 2026-10-03
+# Install on beaver; preserves an existing credentials file and leaves the
+# service stopped until you have entered credentials and explicitly started it.
+set -euo pipefail
+if [ "$(id -u)" -ne 0 ]; then
+  echo 'Run with sudo: sudo bash install.sh' >&2
+  exit 1
+fi
+source_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+command -v docker >/dev/null
+docker inspect meshcore-webui >/dev/null
+apt-get update
+apt-get install -y python3-venv
+install -d -m 0755 /opt/meshcore-phone-mode
+python3 -m venv /opt/meshcore-phone-mode/venv
+/opt/meshcore-phone-mode/venv/bin/python -m pip install -r "$source_dir/requirements.txt"
+if systemctl is-active --quiet meshcore-phone-mode.service; then
+  systemctl stop meshcore-phone-mode.service
+fi
+install -m 0644 "$source_dir/controller.py" /opt/meshcore-phone-mode/controller.py
+install -m 0644 "$source_dir/requirements.txt" /opt/meshcore-phone-mode/requirements.txt
+if [ ! -e /etc/meshcore-phone-mode.ini ]; then
+  install -m 0600 "$source_dir/meshcore-phone-mode.ini.example" /etc/meshcore-phone-mode.ini
+fi
+install -m 0644 "$source_dir/meshcore-phone-mode.service" /etc/systemd/system/meshcore-phone-mode.service
+systemctl daemon-reload
+echo 'Installed. Edit /etc/meshcore-phone-mode.ini locally, then run:'
+echo 'sudo systemctl enable --now meshcore-phone-mode.service'