✨ Introduce guest access control feature

Update event permissions to allow hosts to control guest actions: view and upload, view only, or upload only. This enhances user experience and privacy management for event sharing. Co-authored-by: Copilot <copilot@github.com> 💄 Add dismiss button to preservation nudge Enhance the UI by adding a dismiss button to the preservation nudge bar. Co-authored-by: Copilot <copilot@github.com>