- selectBranchIndex asks the supplied NAMES first and falls back to a lone
agreeing constant only when they settle nothing. A matching `const` does
not identify a branch while another candidate leaves that property unpinned:
`{ kind: "email", phone: "555" }` agrees with an email branch whose
`address` is missing while satisfying a phone branch outright.
- isOfferable requires every property VALUE to be readable — JSON Schema's
boolean form is fine, a `null` or an array is not a schema at all and the
web form dereferences one on the way to choosing a widget. Such a branch is
declined rather than handed on to crash a tool panel that would otherwise
have rendered.
Signed-off-by: cliffhall <cliff@futurescale.com>
ab3f8c779a