refactor(windows): tidy managed-node resolver helpers

Behavior-preserving cleanups on the managed-node resolver:
- Hoist _candidate_node_command_names() out of the inner dir loop in
  find_hermes_node_executable (computed once, not per directory).
- Drop redundant os.environ.copy() at the two with_hermes_node_path(
  os.environ.copy()) sites \u2014 the helper already copies os.environ when
  called with no argument (verified env-equivalent).
- Add reciprocal keep-in-sync comments between iter_hermes_node_dirs()
  (hermes_constants.py) and hermesManagedNodePathEntries() (electron
  main.cjs), which mirror the same platform-ordering rule across the
  Python/Node boundary.

hermes_cli/main.py

@@ -5407,7 +5407,8 @@ def cmd_gui(args: argparse.Namespace):
 
     from hermes_constants import find_node_executable, with_hermes_node_path
 
-    env = with_hermes_node_path(os.environ.copy())
+    # with_hermes_node_path() copies os.environ when called with no arg.
+    env = with_hermes_node_path()
     if getattr(args, "fake_boot", False):
         env["HERMES_DESKTOP_BOOT_FAKE"] = "1"
     if getattr(args, "ignore_existing", False):