docs(install): what install_service.sh installs; verify script port; no sudo for --help

install_service.sh installs and starts ledmatrix, ledmatrix-web and the
update-verify units, not only ledmatrix.service (systemd/README.md,
README.md). MIGRATION_GUIDE presented 'sudo install_service.sh --help'
as a harmless check; it now shows --help without sudo and warns what a
real run does. SSH_UNAVAILABLE_AFTER_INSTALL: verify_installation.sh
checks the web interface on port 5000.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

README.md

@@ -834,9 +834,11 @@ sudo ./scripts/install/install_service.sh
 
 The script will:
 - Detect your user account and home directory
-- Install the service file with the correct paths
-- Enable the service to start on boot
-- Start the service immediately
+- Install `ledmatrix.service` (display, runs as root), `ledmatrix-web.service`
+  (web interface, runs as your user) and the `ledmatrix-update-verify` units,
+  with the correct paths
+- Enable them to start on boot
+- Start them immediately
 
 ### Managing the Service
 

docs/MIGRATION_GUIDE.md

@@ -59,9 +59,12 @@ sudo ./scripts/install/install_service.sh
 After updating your scripts, verify they still work:
 
 ```bash
-# Test installation scripts (if needed)
+# Check the installation scripts are at their new paths
 ls scripts/install/*.sh
-sudo ./scripts/install/install_service.sh --help
+./scripts/install/install_service.sh --help   # prints usage only
+# Note: running install_service.sh for real (with sudo, no --help)
+# reinstalls, enables and restarts ledmatrix.service, ledmatrix-web.service
+# and the update-verify units.
 
 # Test permission scripts
 ls scripts/fix_perms/*.sh

docs/SSH_UNAVAILABLE_AFTER_INSTALL.md

@@ -158,9 +158,11 @@ This script will check:
 - Python dependencies
 - Configuration files
 - File permissions
-- Web interface availability
+- Web interface availability (`ledmatrix-web` listening on port 5000)
 - Network connectivity
 
+Once it passes, the web interface is at `http://<pi-ip>:5000`.
+
 ## Quick Reference Commands
 
 ```bash

systemd/README.md

@@ -52,9 +52,11 @@ This directory contains systemd service unit files for LEDMatrix services.
 ## Installation
 
 These service files are installed by the installation scripts in `scripts/install/`:
-- `install_service.sh` installs `ledmatrix.service`
-- `install_web_service.sh` installs `ledmatrix-web.service` and the
-  `ledmatrix-update-verify` service and path units
+- `install_service.sh` installs `ledmatrix.service`, `ledmatrix-web.service`
+  and the `ledmatrix-update-verify` service and path units, then enables and
+  starts them
+- `install_web_service.sh` installs only `ledmatrix-web.service` and the
+  `ledmatrix-update-verify` units
 - `install_wifi_monitor.sh` installs `ledmatrix-wifi-monitor.service`
 - `install_dns_fix.sh` installs `ledmatrix-dns-fix.service` (opt-in, not run
   by the normal installer)