MVP: Go daemon, password auth, persistent PTY terminals, React/xterm UI, PWA

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

deploy/install.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+# Install the built binary and unit on this host, then (re)start the service.
+set -eu
+cd "$(dirname "$0")/.."
+sudo install -m 0755 bin/hamlet /usr/local/bin/hamlet
+sudo install -m 0644 deploy/hamlet.service /etc/systemd/system/hamlet.service
+sudo systemctl daemon-reload
+sudo systemctl enable --now hamlet.service >/dev/null
+sudo systemctl restart hamlet.service
+sleep 1
+systemctl is-active hamlet.service && /usr/local/bin/hamlet version