Slide deck framework: export slides to PDF (download or send to contacts)

[rosalie1984]

Summary

The slide deck presentation framework should support generating a PDF from a slide deck that can either be downloaded or sent directly to contacts.

Motivation

Today decks are viewed and presented inside the portal, but there is no way to take a deck out of the mesh as a portable, offline artifact. A PDF export makes decks:

• Shareable with people who are not portal users (clients, external stakeholders).
• Downloadable for offline review, archiving, or attaching to other communications.
• Sendable directly to contacts from within the framework, closing the loop from authoring to distribution.

Proposed behavior

• An "Export to PDF" action on a slide deck that renders the full deck (all slides) to a single PDF.
• The PDF preserves slide layout/theming as closely as the rendered deck.
• Two delivery paths:
  1. Download — the user gets the PDF file directly.
  2. Send to contacts — pick one or more contacts and deliver the PDF to them.

Open questions

• Rendering approach (headless browser / server-side rendering of the deck's layout areas to PDF).
• How "contacts" are resolved and how delivery is performed (email? in-mesh notification with attachment?).
• Whether export is per-deck only or also supports a subset/range of slides.

Acceptance criteria

• A slide deck can be exported to a PDF that faithfully represents its slides.
• The PDF can be downloaded from the portal.
• The PDF can be sent directly to one or more selected contacts.