fix(ios): avoid shared pointer Bool conversion in generated Swift bridges

[mrousavy]

Summary

Replace the cached shared-pointer Bool conversion with a use_count() check in the Swift bridge generator, and regenerate the seven checked-in bridges. No API changes.

Current Xcode rejects Bool(fromCxx: cachedCxxPart) because the imported shared_ptr does not conform to CxxConvertibleToBool. This failed the unchanged iOS Release source in #1582: https://github.com/margelo/nitro/actions/runs/33857794566/job/100975015762

This is an independent prerequisite for the atomic stack: #1582 (example move), #1583 (benchmark app), #1584 (version guard). The correction was extracted from the earlier benchmark implementation so neither the move nor performance PR needs to contain it.

Validation

• bun specs regenerated only the expected seven Swift bridges.
• Nitrogen TypeScript and ESLint pass; git diff --check passes.
• These same generated changes compile in a local Xcode 26.6 Release simulator build; its standalone benchmark app completed all 40 cases successfully.
• Fresh CI will validate the existing example independently.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

1 Skipped Deployment

Project	Deployment	Actions	Updated
nitro-docs	Skipped		Sep 4, 2026 9:37am UTC