Call routing

Purpose

Separate public product information from the live call experience while keeping room links anonymous and shareable.

/ renders the landing page and creates a fresh opaque room id only after the user selects Start a call.
/call/:roomId is the canonical call route. The page validates the room id before requesting microphone or camera access.
/r/:roomId remains a compatibility route for previously shared links and uses the same call page implementation.
A valid room link is a bearer capability. A room admits at most two participants while its Durable Object is addressed; there is no persistent room record.
Invalid room ids show an error and offer a link back to the landing page without opening media.