moonbitlang / core / 4196

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refactor(argparse): collapse has_subcommands_for_help with Array::any

```diff
 fn has_subcommands_for_help(cmd : Command) -> Bool {
-  if help_subcommand_enabled(cmd) {
-    return true
-  }
-  for sub in cmd.subcommands {
-    if !sub.hidden {
-      return true
-    }
-  }
-  false
+  help_subcommand_enabled(cmd) || cmd.subcommands.any(sub => !sub.hidden)
 }
```

Same idiom as the earlier `Array::any` collapses (#3530). Boolean
short-circuit on the early-exit branch preserves the original behavior.

Semantics-preserving: `moon test -p argparse` (225/225) passes and
`moon info` produces no `.mbti` change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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