Hyperscript examples working: toggle, bounce, count clicks

- sx_browser.ml: restore VmSuspended handler in api_call_fn with
  make_js_callFn_suspension for IO suspension chains (wait, fetch)
- runtime.sx: delete host-get stub that shadowed platform native —
  hs-toggle-class! now uses real FFI host-get for classList access

All three live demo examples work:
  Toggle Color — classList.toggle on click
  Bounce — add .animate-bounce, wait 1s suspend, remove
  Count Clicks — increment @data-count, put into innerHTML

4/4 bytecode regression tests pass (was 0/4 without VmSuspended).

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

shared/static/wasm/sx/module-manifest.json

@@ -991,7 +991,6 @@
       "hs-last",
       "hs-template",
       "hs-make-object",
-      "hs-host-get",
       "hs-dom-query",
       "hs-method-call",
       "hs-beep",