Support sending PDF files directly in guest messages

Problem Statement:

• When hosts paste Google Drive links to PDFs (like Home Guides) in guest messages, Airbnb and Vrbo sometimes block delivery
• This creates a gap in communication — guests don't receive important documents

Current Workaround:

• Hosts paste Google Drive links to PDFs in messages, but these links are often blocked by Airbnb/Vrbo

Impact:

• Guests may not receive critical information like house manuals or check-in instructions
• Hosts have to find alternative ways to share documents, which is time-consuming and unreliable

Proposed Solution:

• Allow hosts to upload and send PDF files directly through Hospitable messages, rather than relying on external links

Unlock:

• Hosts would be able to reliably share PDF documents (Home Guides, check-in instructions, etc.) with guests through Hospitable messages, ensuring guests receive all important information