Feature request: viewer comments on published artifacts (Docs-style anchored feedback)

We share interactive design mocks as published artifacts with our engineering team (Team plan). Sharing and live republish work well, but viewers have no way to leave feedback on the page — every opinion immediately fragments into Slack threads and ticket comments, losing the anchor to what the commenter was looking at.

Request: let authenticated viewers of a shared artifact leave comments, ideally anchored to an element or region (Google Docs / Figma style), visible to the owner and other viewers.

Today's workaround: we number annotations inside the mock so Slack feedback can reference "badge 10" — it works, but it's a hand-rolled substitute for a comment layer the platform seems well positioned to own, given viewers are already authenticated and live updates already stream to open pages.