giles 2de4ba8c57 Refactor spread to use provide/emit! internally ...

Spreads now emit their attrs into the nearest element's provide scope
instead of requiring per-child spread? checks at every intermediate
layer. emit! is tolerant (no-op when no provider), so spreads in
non-element contexts silently vanish.

- adapter-html: element/lake/marsh wrap children in provide, collect
  emitted; removed 14 spread filters from fragment, forms, components
- adapter-sx: aser wraps result to catch spread values from fn calls;
  aser-call uses provide with attr-parts/child-parts ordering
- adapter-async: same pattern for both render and aser paths
- adapter-dom: added emit! in spread dispatch + provide in element
  rendering; kept spread? checks for reactive/island and DOM safety
- platform: emit! returns NIL when no provider instead of erroring
- 3 new aser tests: stored spread, nested element, silent drop

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-13 15:41:32 +00:00

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