fix: close select dropdown when clicking outside

[ObservedObserver]

Summary

• close the select options panel when interactions occur outside the component
• keep the trigger and options components in sync by passing the current value and open status

Testing

• yarn --cwd streamlit_shadcn_ui/components/packages/frontend build (fails: package not in lockfile)

---

https://chatgpt.com/codex/tasks/task_e_68eff67f67e88322825fdb6ea9776173