Pulse streams need an editable kind and a user-facing name — 'Today's Credentials' is not an 'updates_index'

The auto-inferred stream kind is wrong often enough to need a correction path, and streams have no name field at all — but real publication streams have titles. Lumina's https://www.luminafoundation.org/topics/todays-credentials/ is called 'Today's Credentials', and the operator can neither fix its classifier nor record what it's called.