Adopt ProblemHttpResult pattern for ProblemDetailsService in TypedResults

[Copilot]

Adopt ProblemHttpResult pattern for ProblemDetailsService in TypedResults

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Standardizes ProblemDetailsService handling across TypedResults to match ProblemHttpResult pattern.

Description

The TypedResults classes (BadRequest<T>, InternalServerError<T>, Conflict<T>, UnprocessableEntity<T>) used an inconsistent pattern for handling IProblemDetailsService compared to ProblemHttpResult.

Changed pattern from:

var problemDetailsService = httpContext.RequestServices.GetService<IProblemDetailsService>();
if (problemDetailsService is not null &&
    await problemDetailsService.TryWriteAsync(...))
{
    return;
}

await HttpResultsHelper.WriteResultAsJsonAsync(...);

To:

var problemDetailsService = httpContext.RequestServices.GetService<IProblemDetailsService>();
if (problemDetailsService is null || !await problemDetailsService.TryWriteAsync(...))
{
    await HttpResultsHelper.WriteResultAsJsonAsync(...);
}

This aligns with the established pattern in ProblemHttpResult.cs and eliminates the early return, making the fallback logic explicit.

Files Changed

• InternalServerErrorOfT.cs
• BadRequestOfT.cs
• ConflictOfT.cs
• UnprocessableEntityOfT.cs

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[mikekistler]

Thanks @copilot, but I'll just make this change myself.