improvement(ui): share public chat composer actions

[BillLeoutsakosvl346]

Summary

• Share the circular attachment, send and stop actions in public chat.
• Preserve the existing quiet/primary palettes, 28px size, labels, icons and disabled/streaming conditions.

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.
• Before/after browser fixtures cover the changed component's styling and interactions. Original and extracted controls have matching computed styles. 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 11:43pm UTC

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge because the extraction preserves the existing controls’ DOM behavior, accessibility, state handling, and styling.

Summary

This PR extracts the public-chat composer’s attachment, send, and stop controls into a shared circular action button while preserving their existing behavior and presentation.

• Adds a typed, ref-forwarding PublicChatActionButton.
• Reuses it for all three public-chat composer actions.
• Keeps the existing callbacks, disabled states, accessibility labels, variants, icons, and 28px circular styling.

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[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

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

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