Step 17: streaming render — hyperscript enhancements, WASM builds, live server tests

Streaming chunked transfer with shell-first suspense and resolve scripts.
Hyperscript parser/compiler/runtime expanded for conformance. WASM static
assets added to OCaml host. Playwright streaming and page-level test suites.

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

sx/sx/streaming-demo.test.sx

@@ -0,0 +1,31 @@
+;; Page test for /sx/(geography.(isomorphism.streaming))
+;;
+;; The streaming page sends an HTML shell immediately with suspense
+;; skeletons, then resolves three slots at staggered delays (1s, 3s, 5s).
+;; Single navigation test — streaming pages block the server during IO,
+;; so multiple navigations in one suite would queue.
+
+(defsuite
+  "streaming-demo"
+  :url "/sx/(geography.(isomorphism.streaming))"
+  :stream true
+  :timeout 60000
+  (deftest
+    "streaming page renders and resolves"
+    (wait-for "h1" :text "Streaming" :timeout 30000)
+    (assert-count "[data-suspense]" 3 :timeout 30000)
+    (wait-for
+      "[data-suspense='stream-fast']"
+      :text "Fast source"
+      :timeout 30000)
+    (wait-for
+      "[data-suspense='stream-medium']"
+      :text "Medium source"
+      :timeout 30000)
+    (wait-for
+      "[data-suspense='stream-slow']"
+      :text "Slow source"
+      :timeout 30000)
+    (wait-for "[data-suspense='stream-fast']" :text "~1s" :timeout 5000)
+    (wait-for "[data-suspense='stream-medium']" :text "~3s" :timeout 5000)
+    (wait-for "[data-suspense='stream-slow']" :text "~5s" :timeout 5000)))