Add deploy.sh and update AGENTS.md with cross-machine workflow

deploy.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REMOTE_USER="accusys"
+REMOTE_HOST="m5max128.local"
+REMOTE_DIR="~/momentry_portal"
+
+if ! git diff --quiet --cached; then
+  echo ":: Unstaged changes detected. Stage or stash them first."
+  echo "   git add -A && git stash"
+  exit 1
+fi
+
+if [ -n "$(git status --porcelain)" ]; then
+  echo ":: Uncommitted changes found."
+  if [ $# -ge 1 ]; then
+    git add -A && git commit -m "$*"
+  else
+    git add -A && git commit -m "deploy: $(date '+%Y-%m-%d %H:%M')"
+  fi
+fi
+
+echo ":: Pushing to Gitea..."
+git push
+
+echo ":: Deploying to ${REMOTE_HOST}..."
+ssh "${REMOTE_USER}@${REMOTE_HOST}" \
+  "export PATH=\"\$HOME/.local/bin:\$PATH\" && eval \"\$(fnm env --use-on-cd)\" && \
+   cd ${REMOTE_DIR} && \
+   git pull && \
+   npm run build"
+
+echo ":: Done"