Revert "feat(web): route chat completions and AI gateway calls to global app"

[chrarnoldus]

Reverts #5001

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

This PR is an exact inverse revert of the 8-line global-API rewrite addition from #5001; the diff removes only the /api/gateway/:path* and /api/openrouter/:path* rewrite entries, and local route handlers for both paths still exist, so no defect was found in the changed code.

Files Reviewed (1 file)

• apps/web/next.config.mjs

Note: The PR body states it reverts #5001; git show confirms the original commit added exactly these 8 lines and this revert removes exactly those 8 lines.

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_{Review guidance: REVIEW.md from base branch main}