chore: clean up web ui repo hygiene

scripts/check_frontend_quality.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+frontend_dir="${root_dir}/frontend"
+
+if command -v bun >/dev/null 2>&1; then
+  bun_cmd=(bun)
+elif [[ -x "${HOME}/.bun/bin/bun" ]]; then
+  bun_cmd=("${HOME}/.bun/bin/bun")
+else
+  echo "bun is required to run frontend checks" >&2
+  exit 1
+fi
+
+cd "${frontend_dir}"
+"${bun_cmd[@]}" run check
+"${bun_cmd[@]}" run build