Fix the lint issues below in a single file. They were reported by Ultracite and could not be fixed automatically.

File: <run-root>/icb-codex-4/core/cookies/index.ts

Issues:
1. line 35, col 1 — lint/performance/noBarrelFile: Avoid barrel files, they slow down performance, and cause large module graphs with modules that go unused.

Full diagnostics (JSON, including rule help text, documentation URLs, and source spans) are at: <run-root>/icb-codex-4/index.ts.baa93e09.json

Rules:
- Edit only the file above. Do not create, delete, or modify any other file.
- Make the minimal change that resolves each issue while preserving runtime behavior.
- Fix the underlying problem — the file is re-linted after your edit, and a diagnostic that still fires is a failed fix. Restyling the flagged code (renaming, re-spelling escapes, equivalent syntax) will not clear it; rework the code so the rule genuinely no longer applies.
- Follow the rule's help text from the JSON file where provided.
- Do not add suppression comments (// oxlint-disable, // eslint-disable, // biome-ignore) or change lint configuration.
- Do not reformat unrelated code.