fix(jsruntime): Effect.pipe(map) chain composition

[proggeramlug]

Summary

• Effect.runSync(Effect.succeed(42).pipe(Effect.map(x => x + 1))) returned undefined (TypeError: f is not a function) instead of 43. PR feat(jsruntime): V8 named-import static-method dispatch for Effect.succeed #992 fixed Effect.succeed(42) but the follow-on Effect.map(fn) lost its closure arg at the V8 boundary.
• Two-layer fix: extend HIR js_transform to wrap Closure args of StaticMethodCall on V8-imported classes in JsCreateCallback, and add a GC_TYPE_CLOSURE arm to native_object_to_v8 that wraps the closure pointer as a real v8::Function (covers the LocalGet/FuncRef fallback path).
• Bumps to 0.5.1002; fixture at test-files/test_effect_pipe_map.ts.

Root cause

StaticMethodCall { class_name: "Effect", method_name: "map", args: [Closure {...}] } flowed through emit_v8_member_method_call -> js_call_v8_member_method. Each arg was packed via native_to_v8(scope, fixup_native_for_v8(a)). The closure's raw *const ClosureHeader had heap-pointer bits (0x0000_0001_xxxx_xxxx), so fixup_native_for_v8 tagged it POINTER_TAG. native_to_v8 then dispatched to native_object_to_v8, which had arms for GC_TYPE_PROMISE / ARRAY / OBJECT but not CLOSURE — fallback string/array heuristics misidentified the closure and surfaced as a proxy object. Effect's pipeline tried f = transformer._op_action_fn, got a non-function, threw inside runSync.

Fix

1. crates/perry-hir/src/js_transform.rs — StaticMethodCall arm now checks extern_func_to_js.contains_key(class_name) and rewrites any Closure arg into JsCreateCallback { closure, param_count }, marking the closure's params as JS values on a cloned tracker (mirrors the existing JsCallMethod arm).

2. crates/perry-jsruntime/src/bridge.rs:

   • New perry_closure_v8_trampoline + native_closure_to_v8: build a v8::Function whose data slot holds the closure's raw *const ClosureHeader (wrapped in v8::External). On invocation the trampoline marshals args via v8_to_native, stashes the scope for nested FFI (stash_trampoline_scope), calls js_closure_call_array(closure_env, args_ptr, args_len), and returns through native_to_v8.
   • native_object_to_v8 gains a GC_TYPE_CLOSURE arm gated on CLOSURE_MAGIC at offset 12 (same tag js_value_typeof uses), routed to native_closure_to_v8. Defense-in-depth for the LocalGet / FuncRef fallback path that the HIR transform can't see.

Test plan

• Effect.runSync(Effect.succeed(42).pipe(Effect.map((x: number) => x + 1))) returns 43 (was: undefined with internal f is not a function).
• const fn = (x) => x + 1; Effect.runSync(Effect.succeed(42).pipe(Effect.map(fn))) returns 43 (named local case — exercises the new bridge GC_TYPE_CLOSURE arm).
• Gap suite: 30/36 pass — same set as pre-fix; no regressions.
• All four test_issue_effect_* fixtures still pass (arguments_length_returned_fn, factory_static_dispatch, tag_deeper, tag_undefined).
• Fixture test-files/test_effect_pipe_map.ts exercises the chain.