merge: architecture → hs-f (R7RS steps 4-6, IO suspension, JIT, language libs)

Brings in 306 commits from architecture:
- R7RS: call/cc, raise/guard, records, parameters, syntax-rules, define-library/import
- IO suspension: perform/resume, third CEK phase
- JIT expansion: component/island JIT, OP_SWAP, exception handler stack, scope forms
- OCaml: HTML renderer, Python bridge, epoch protocol, sx_scope.ml
- Language libs: common-lisp, erlang, forth, apl, prolog, tcl, smalltalk, ruby

Conflict resolution: hs-f version kept for all hyperscript .sx files (superseding
architecture's smaller additions). Architecture's platform.py kept with hs-f's
domListen _driveAsync fix applied.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

hosts/javascript/run_tests.js

@@ -293,6 +293,8 @@ env["pop-suite"] = function() {
   return null;
 };
 
+env["test-allowed?"] = function(name) { return true; };
+
 // Load test framework
 const projectDir = path.join(__dirname, "..", "..");
 const specTests = path.join(projectDir, "spec", "tests");
@@ -341,6 +343,20 @@ if (fs.existsSync(swapPath)) {
   }
 }
 
+// Load spec library files (define-library modules imported by tests)
+for (const libFile of ["stdlib.sx", "signals.sx", "coroutines.sx"]) {
+  const libPath = path.join(projectDir, "spec", libFile);
+  if (fs.existsSync(libPath)) {
+    const libSrc = fs.readFileSync(libPath, "utf8");
+    const libExprs = Sx.parse(libSrc);
+    for (const expr of libExprs) {
+      try { Sx.eval(expr, env); } catch (e) {
+        console.error(`Error loading spec/${libFile}: ${e.message}`);
+      }
+    }
+  }
+}
+
 // Load tw system (needed by spec/tests/test-tw.sx)
 const twDir = path.join(projectDir, "shared", "sx", "templates");
 for (const twFile of ["tw-type.sx", "tw-layout.sx", "tw.sx"]) {