Restore hyperscript work on stable site base (908f4f80)

Reset to last known-good state (908f4f80) where links, stepper, and
islands all work, then recovered all hyperscript implementation,
conformance tests, behavioral tests, Playwright specs, site sandbox,
IO-aware server loading, and upstream test suite from f271c88a.

Excludes runtime changes (VM resolve hook, VmSuspended browser handler,
sx_ref.ml guard recovery) that need careful re-integration.

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

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

@@ -568,6 +568,55 @@
       "render-dom-error-boundary"
     ]
   },
+  "tw-layout": {
+    "file": "tw-layout.sxbc",
+    "deps": [],
+    "exports": [
+      "tw-spacing-props",
+      "tw-displays",
+      "tw-max-widths",
+      "tw-min-widths",
+      "tw-resolve-layout"
+    ]
+  },
+  "tw-type": {
+    "file": "tw-type.sxbc",
+    "deps": [],
+    "exports": [
+      "tw-sizes",
+      "tw-weights",
+      "tw-families",
+      "tw-alignments",
+      "tw-leading",
+      "tw-tracking",
+      "tw-resolve-type"
+    ]
+  },
+  "tw": {
+    "file": "tw.sxbc",
+    "deps": [],
+    "exports": [
+      "colour-bases",
+      "colour-with-alpha",
+      "lerp",
+      "shade-to-lightness",
+      "colour",
+      "tw-colour-props",
+      "tw-breakpoints",
+      "tw-states",
+      "tw-selector-states",
+      "tw-container-sizes",
+      "tw-spacing-value",
+      "tw-template",
+      "tw-shadow-sizes",
+      "tw-rounded-sizes",
+      "tw-border-widths",
+      "tw-arbitrary-props",
+      "tw-resolve-arbitrary",
+      "tw-resolve-style",
+      "tw-process-token"
+    ]
+  },
   "web boot-helpers": {
     "file": "boot-helpers.sxbc",
     "deps": [
@@ -797,8 +846,7 @@
       "sx dom",
       "sx browser",
       "web adapter-dom",
-      "web engine",
-      "hyperscript integration"
+      "web engine"
     ],
     "exports": [
       "_preload-cache",
@@ -862,47 +910,40 @@
       "engine-init"
     ]
   },
-  "hyperscript tokenizer": {
+  "hs-tokenizer": {
     "file": "hs-tokenizer.sxbc",
     "deps": [],
     "exports": [
-      "hs-tokenize",
       "hs-make-token",
-      "hs-keywords",
-      "hs-keyword?",
       "hs-digit?",
       "hs-letter?",
       "hs-ident-start?",
       "hs-ident-char?",
-      "hs-ws?"
+      "hs-ws?",
+      "hs-keywords",
+      "hs-keyword?",
+      "hs-tokenize"
     ]
   },
-  "hyperscript parser": {
+  "hs-parser": {
     "file": "hs-parser.sxbc",
-    "deps": [
-      "hyperscript tokenizer"
-    ],
+    "deps": [],
     "exports": [
       "hs-parse",
       "hs-compile"
     ]
   },
-  "hyperscript compiler": {
+  "hs-compiler": {
     "file": "hs-compiler.sxbc",
-    "deps": [
-      "hyperscript parser"
-    ],
+    "deps": [],
     "exports": [
       "hs-to-sx",
       "hs-to-sx-from-source"
     ]
   },
-  "hyperscript runtime": {
+  "hs-runtime": {
     "file": "hs-runtime.sxbc",
-    "deps": [
-      "sx dom",
-      "sx browser"
-    ],
+    "deps": [],
     "exports": [
       "hs-on",
       "hs-on-every",
@@ -925,19 +966,39 @@
       "hs-repeat-forever",
       "hs-fetch",
       "hs-coerce",
+      "hs-add",
       "hs-make",
       "hs-install",
       "hs-measure",
-      "hs-transition"
+      "hs-transition",
+      "hs-type-check",
+      "hs-type-check-strict",
+      "hs-strict-eq",
+      "hs-falsy?",
+      "hs-matches?",
+      "hs-contains?",
+      "hs-empty?",
+      "hs-first",
+      "hs-last",
+      "hs-template",
+      "hs-make-object",
+      "host-get",
+      "dom-query",
+      "hs-method-call",
+      "hs-beep",
+      "hs-prop-is",
+      "hs-slice",
+      "hs-sorted-by",
+      "hs-sorted-by-desc",
+      "hs-split-by",
+      "hs-joined-by",
+      "hs-sorted-by",
+      "hs-sorted-by-desc"
     ]
   },
-  "hyperscript integration": {
+  "hs-integration": {
     "file": "hs-integration.sxbc",
-    "deps": [
-      "hyperscript compiler",
-      "hyperscript runtime",
-      "sx dom"
-    ],
+    "deps": [],
     "exports": [
       "hs-handler",
       "hs-activate!",