fix(web): hide private visibility option when workspace doesn't support it

[soneda-yuya]

Summary

• Hide the "Private" option in the project visibility selector when the workspace policy doesn't allow private projects
• Previously, the option was visible but the disabled property wasn't being passed to the SelectField component

What I've done

• Modified ProjectVisibilityModal.tsx to conditionally include the private option only when enableToCreatePrivateProject is true

What I haven't done

• No changes to the SelectField or Selector components to support disabled options

How I tested

• Manual testing required

Which point I want you to review particularly

• The filtering logic for projectVisibilityOptions

Memo

• The Confirm button still has a safety check for projectVisibility === "private" && !enableToCreatePrivateProject

Checklist

• Verified backward compatibility related to feature modifications
• Confirmed backward compatibility for migrations
• Verified that no personally identifiable information (PII) is included

🤖 Generated with Claude Code

[github-actions]

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