improvement(ui): share public authentication headings

[BillLeoutsakosvl346]

Summary

• Share the identical heading and subtitle treatment across five public chat, file-share and SSO access gates.
• Preserve the existing 40px heading, spacing, colors and dynamic verification copy.

Type of Change

• Refactor / maintainability improvement

Testing

• Full workspace type checks, lint, repository audits (including import and API validation), generators and docs checks pass.
• External source comparison confirms caller logic and content are unchanged.
• Original and extracted components have matching computed styles in light/dark browser fixtures; keyboard, disabled and expansion behavior checked. These are isolated fixtures, not full authenticated product flows.
• Relevant existing tests pass. No landing-page changes or audit tooling included.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 20, 2026 10:50pm UTC

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge because it is a behavior-preserving presentation refactor with no identified functional, build, security, or repository-rule regressions.

Summary

This PR extracts the repeated heading and subtitle markup from public chat, file-share, and SSO authentication gates into a shared PublicAuthHeader component.

• Preserves the existing heading hierarchy, typography, spacing, colors, and copy.
• Retains dynamic email-verification text without changing authentication behavior.
• Uses the established application alias and remains compatible with both server and client component callers.

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[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

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