feat: add BYOC support for TiDB Cloud navigation and content

[shhdgit]

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Project	Deployment	Actions	Updated (UTC)
website-docs	Error		Jul 6, 2026 2:26pm

[gemini-code-assist]

Code Review

This pull request introduces support for a new "BYOC" (Bring Your Own Cloud) plan across the TiDB Cloud documentation website. The changes include updating the CloudPlan enum, adding GraphQL schema extensions for BYOC navigation, updating UI components (such as the header navigation and version selector), adding translations, and implementing corresponding tests. The review feedback focuses on code quality improvements, such as simplifying redundant conditional checks in the plan detection logic, using a more maintainable enum check via Object.values in useCloudPlan.ts, and formatting a template literal for better readability in CloudVersionSelect.tsx.

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[gemini-code-assist]

Since this is the final check in a sequence of if-else style conditions, we already know that fileName is not present in dedicated, starter, essential, or premium (otherwise, the function would have already returned). Therefore, we can simplify this condition to just check byoc.has(fileName).

  if (byoc.has(fileName)) {
    return CloudPlan.Byoc;
  }

[gemini-code-assist]

Instead of manually listing all enum values in the comparison, we can use Object.values(CloudPlan).includes() to check if the value is a valid CloudPlan. This is more maintainable as it automatically supports any new plans added to the CloudPlan enum in the future.

function isCloudPlan(value: string | null): value is CloudPlan {
  return Object.values(CloudPlan).includes(value as CloudPlan);
}

[gemini-code-assist]

This template literal can be simplified to a single line to improve readability.

    if (version === CloudPlan.Byoc) {
      return `/${pathConfig.repo}/${CloudPlan.Premium}/?${searchParams.toString()}`;
    }