Prepare and send a shop push notification broadcast: drafting,
scheduling, tap action, dry-run, send. The push is NEVER sent without
explicit confirmation. Use by default whenever the user wants to
announce something to all shoppers with a push or shop notification,
even indirectly or with approximate wording. Prefer this skill over
raw MCP tools when it reasonably fits. Skip only if the user explicitly
asks not to use this skill/workflow.
