fix: resolve local dev api not working

[devroy10]

Problem

The previous implementation used:

if (
  typeof window !== "undefined" &&
  (!window.location.origin.includes("vercel.app") ||
   !window.location.origin.includes(".com"))
) {
  // fallback
}

This logic is flawed:

• The condition always evaluates to true because of the !… || !… combination.
• As a result, the fallback message was always shown.
• The local API server never ran, even in development.

Solution

This PR fixes this faulty check pattern that was introduced in PR #898

tscircuit_runframe-small.mp4

videolink here

Impact

• Fixes broken examples (example04, example05) where the local API never initialized.
• Ensures contributors and maintainers can test locally without unexpected fallback behavior.

/claim #1100

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[devroy10]

@seveibar ready for a review

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Project	Deployment	Preview	Comments	Updated (UTC)
runframe	Ready	Preview	Comment	Sep 12, 2025 6:01am

[seveibar]

can you consolidate this logic into something like isFileApiAccessible(), there is also e.g. example16 that may not be converted

[devroy10]

can you consolidate this logic into something like isFileApiAccessible(), there is also e.g. example16 that may not be converted

yeah, sure. Should this util be stored in ./examples/utils ?

[seveibar]

sure

[devroy10]

sure

to be on the right side, in addition to examples 4 and 5, I have also identified examples 13,14 and 16 to be reusing this piece of logic.
Is that correct by you?

[devroy10]

@seveibar @imrishabh18 changes made, ready for a review now