giles 44b520a9e9 Step 10c: fix bind subscriber re-evaluation — track names not frames ...

Root cause: context called inside lambdas (e.g. swap!) went through
nested cek_run with empty kont, so provide frames weren't found and
never tracked to *bind-tracking*.

Three changes in evaluator.sx:
- step-sf-context: track context names (not frames) to *bind-tracking*
  — names work across cek_run boundaries via scope-peek fallback
- bind continue: resolve tracked names to frames via kont-find-provide
  on rest-k before registering subscribers
- subscriber: use empty kont instead of kont-extract-provides — old
  approach created provide frames whose continue handlers called
  scope-pop!, corrupting the scope stack

2752/2768 OCaml tests pass (all 7 bind subscriber tests fixed).
32/32 WASM native tests pass.

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

2026-04-05 11:05:17 +00:00

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