giles 0044f17e4c WIP: DOM-preserving hydration — SSR DOM stays, no visual flash ...

Adds hydration cursor to render pipeline:
- boot.sx: *hydrating* flag, hydrate-start!/stop!, cursor stack helpers
- adapter-dom.sx: render-dom-element uses existing SSR elements when
  *hydrating* is true. Text nodes reused. dom-append skipped.
- hydrate-island: calls hydrate-start! before render-to-dom, no
  replaceChildren. SSR DOM stays in place.

Status: screenshots identical (no visual flash), but event listeners
not attaching — the cursor/set! interaction between CEK and VM needs
debugging. The hydrate-start! set! on *hydrating* may not propagate
to the bytecoded adapter-dom render path.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-10 10:40:09 +00:00

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