Continues the pattern of eliminating Python sx_call tree-building in favour of data-driven .sx defcomps. POST/PUT/DELETE routes now pass plain data (dicts, lists, scalars) and let .sx handle iteration, conditionals, and layout via map/let/when/if. Single response components wrap OOB swaps. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>