feat(jmri): headless JMRI server with Leviton layout power monitor and X11 GUI mode

- Stable udev device symlinks (/dev/jmri/nce, /dev/jmri/loconet, /dev/jmri/lcc)
- jmri-monitor: polls Leviton Decora Smart switch to start/stop JMRI automatically
  - Quiet hours 1-10 AM (no polling)
  - 30s off-delay before shutdown
- LCRR config cloned from Gitea (ssh://gitea.mk-labs.cloud:2221/rblundon/LCRR.git)
- ~/.jmri symlinked to LCRR repo for GitOps config management
- jmri-gui: X11 remote GUI access (PanelPro/DecoderPro) via ssh -X as jmri user
  - Stops daemon, launches GUI, restarts daemon on exit if layout still on
- jmri user gets login shell + SSH key for GUI sessions
- Full JRE installed (openjdk-21-jre) for AWT/X11 support

ansible/roles/jmri/defaults/main.yml

@@ -9,17 +9,45 @@ jmri_user: jmri
 jmri_group: jmri
 jmri_home: /home/jmri
 
-# Profile — override per-host in inventory
-# Find on the old box: ls ~/.jmri/profiles/
+# Profile — set per-host in host_vars
 jmri_profile_id: ""
 
-# Config restore source (path to the backed-up .jmri directory)
+# LCRR git repo (set per-host in host_vars; leave blank to skip clone)
+jmri_lcrr_repo: ""
+
+# SSH key for jmri user (for jmri-gui X11 access — set per-host in host_vars)
+jmri_ssh_authorized_key: ""
+
+# SSH key for jmri user → Gitea
+jmri_gitea_key: /home/jmri/.ssh/id_ed25519_gitea
+
+# Config restore source (legacy tar-based restore — leave blank to skip)
 jmri_config_src: ""
 
 # Ports (for documentation / firewall rules)
 jmri_json_port: 12080
 jmri_withrottle_port: 12090
 
-# USB serial device for NCE (set per-host in inventory)
-# e.g. /dev/ttyUSB0 or /dev/ttyACM0
-jmri_serial_device: /dev/ttyUSB0
+# ---------------------------------------------------------------------------
+# Phase 2 — Layout power monitor (Leviton Decora Smart Wi-Fi)
+# ---------------------------------------------------------------------------
+jmri_leviton_email: ""          # set via group_vars (vault-backed)
+jmri_leviton_password: ""       # set via group_vars (vault-backed)
+jmri_leviton_switch_name: "Layout"
+jmri_monitor_poll_interval: 30  # seconds between polls (active hours)
+jmri_monitor_quiet_start: 1     # hour (24h) to stop polling
+jmri_monitor_quiet_end: 10      # hour (24h) to resume polling
+jmri_monitor_stop_delay: 30     # seconds of OFF state before stopping JMRI
+
+# ---------------------------------------------------------------------------
+# USB device identification (ENV{ID_SERIAL} from udev — the segment of the
+# by-id symlink name before the -ifNN suffix)
+# ---------------------------------------------------------------------------
+# LocoBuffer-NG (LocoNet bridge) → /dev/jmri/loconet
+jmri_dev_loconet_serial: "RR-CirKits_LocoBuffer-NG_CDC_ACM_SERIAL_DEVICE_AA5700218A"
+
+# NCE command station → /dev/jmri/nce  ← triggers service start/stop
+jmri_dev_nce_serial: "Microchip_Technology_Inc._Simple_CDC_Device_Demo"
+
+# FTDI LCC interface → /dev/jmri/lcc
+jmri_dev_lcc_serial: "ftdi_usb_serial_converter_ftDYQHZX"