fix(demo): resolve type error in skyfire-kya token creation

[ak68a]

Summary

• Replace @ts-expect-error suppression with an explicit type assertion for the non-standard "kya+JWT" typ header

The Skyfire KYA spec uses a custom media type (kya+JWT) per RFC 7515 structured syntax suffixes. The assertion documents this intent rather than silencing the type error with a TODO comment.

Test plan

• Demo compiles without type errors
• pnpm demo:skyfire-kya runs successfully

Summary by CodeRabbit

• Refactor
  • Improved TypeScript type handling by replacing error suppression with an explicit type assertion in token creation logic. No functional changes.

[coderabbitai]

Walkthrough

Updated JWT header construction in createMockSkyfireKyaToken by replacing a TypeScript error suppression comment with a type assertion. The typ field value "kya+JWT" is now asserted as "JWT" type instead of suppressing type errors. No logic or control flow changes.

Changes

Cohort / File(s)	Summary
JWT Header Type Assertion demos/skyfire-kya/src/kya-token.ts	Replaced // @ts-expect-error`` workaround with type assertion for JWT header typ field, converting `"kya+JWT"` to asserted `"JWT"` type.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: fixing a TypeScript type error in the Skyfire KYA token creation by replacing a @ts-expect-error suppression with an explicit type assertion.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[ak68a]

Worth noting.. the underlying issue is that JwtHeader.typ in the jwt package is typed as the literal "JWT", so there's no way to pass a custom media type like "kya+JWT" without an assertion.

If custom typ values are expected to be a supported use case (Skyfire KYA uses it per RFC 7515), it might be worth widening the type to something like "JWT" | (string & {}) in the jwt package itself. Happy to open a separate PR for that if it makes sense.