Build: stop tracking bundled artifacts (#2455) (thanks @0oAstro)

Co-authored-by: 0oAstro <0oAstro@users.noreply.github.com>

scripts/bundle-a2ui.sh

@@ -1,6 +1,12 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+on_error() {
+  echo "A2UI bundling failed. Re-run with: pnpm canvas:a2ui:bundle" >&2
+  echo "If this persists, verify pnpm deps and try again." >&2
+}
+trap on_error ERR
+
 ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 HASH_FILE="$ROOT_DIR/src/canvas-host/a2ui/.bundle.hash"