- Omit Next from the guest multi-select ui-request options until at least
one option is checked or a custom answer exists, mirroring the local
dialog's disabled-Next gating. The remote select has no disabled-row
concept, so Next is omitted rather than dimmed (PRRT_kwDOQxs0bc6OFbDW).
- Add the bottomBorder(1) term to the ask dialog's fixed-row budget so the
rendered dialog no longer overflows the viewport by one row
(PRRT_kwDOQxs0bc6OFbDY).
- Add focused tests: guest wire-level Next gating round trip, and dialog
height <= viewport assertion.