js-on-sx: js-new-call honours function-typed constructor returns

new Object(func) should return func itself (per ES spec - "if value
is a native ECMAScript object, return it"), but js-new-call only
kept the ctor's return when it was dict or list — functions fell
through to the empty wrapper. Added (js-function? ret) to the
accept set.
built-ins/Object: 42/50 → 44/50. conformance.sh: 148/148.

plans/js-on-sx.md

@@ -158,6 +158,8 @@ Each item: implement → tests → update progress. Mark `[x]` when tests green.
 
 Append-only record of completed iterations. Loop writes one line per iteration: date, what was done, test count delta.
 
+- 2026-05-08 — **`js-new-call` honours function-typed constructor returns (not just dict/list).** `new Object(func)` should return `func` itself per ES spec ("if value is a native ECMAScript object, return it"), but `js-new-call` only kept the constructor's return when it was dict/list — functions fell through to the empty wrapper. Added `(js-function? ret)` to the accept set. Now `new Object(fn) === fn` and `new Object(fn)()` invokes `fn`. built-ins/Object: 42/50 → 44/50. conformance.sh: 148/148.
+
 - 2026-05-08 — **`var` declarations hoist out of nested blocks; nested `var` becomes `set!`.** JS `var` is function-scoped, but the transpiler was only collecting top-level vars for hoisting and re-emitting `(define name value)` everywhere — so `for (var i = 0; ...) { var r = i; } r` saw `r` as undefined because the inner `(define r ...)` shadowed the (un-hoisted) outer scope. Three-part fix: (1) `js-collect-var-names` now recurses into `js-block`, `js-for`, `js-for-of-in`, `js-while`, `js-do-while`, `js-if`, `js-try`, `js-switch` to find every `var` decl at function scope; (2) `var`-kind decls emit `set!` (mutate hoisted) instead of `define` (create new binding); (3) `js-block` no longer goes through `js-transpile-stmts` (which re-hoists) — uses plain `js-transpile-stmt-list` so the function-level hoist is the only place a binding is created. built-ins/Array: 17/45 → 18/45, String: 77/99 → 78/99. conformance.sh: 148/148.
 
 - 2026-05-08 — **`arr.length = N` extends the array (no-op for shrink).** `js-list-set!` was a no-op for the `length` key. Added a clause that pads with `js-undefined` via `js-pad-list!` when N > current length. Skipped truncation for now: the `pop-last!` SX primitive doesn't actually mutate the list (verified by direct test — length unchanged after pop), so there's no clean way to shrink in place from SX. Extension covers the common test262 cases (`var x = []; x.length = 5`). built-ins/Array: 16/45 → 17/45. conformance.sh: 148/148.