New document format and file interface

✨ New Features

• Launched a new Documents experience with an improved file management interface.
• Implemented an updated document format for more reliable document processing.

🔧 Improvements

• Added last updated dates to document headers for better visibility.
• Improved file uploads with drag-and-drop refresh and clearer file type restrictions.
• Improved delete actions with confirmation feedback.
• Improved folder selection with easier deselection.
• Improved jurisdiction selector with clearer naming and added missing regions.
• Improved eSign workflows with better error handling and more reliable downloads.
• Improved chat interface by hiding unused elements in empty responses.

🐞 Fixes

• Fixed header layout issues when selecting documents in a list.

🔒 Security & Reliability

• Improved error handling in eSign workflows with clearer user-facing messages.