improvement(ui): reuse chips for custom block upload actions

[BillLeoutsakosvl346]

Summary

• Use the existing outlined Chip for custom-block Upload/Change and the icon Button for Remove.
• Keep upload callbacks, accepted file types and pending/permission guards. Center the actions beside the unchanged preview; adopt the shared 30px chip geometry and outline.

Type of Change

• Refactor / maintainability improvement

Testing

• Full workspace type checks, lint, repository audits (including import and API validation), generators and docs checks pass.
• Complete EMCN suite and relevant existing consumer tests pass.
• Isolated real-component browser fixtures cover light/dark, narrow layouts, enlarged text and disabled states; icon-menu checks cover keyboard selection, Escape and focus restoration. Upload fixtures exercise local action callbacks, not a live upload service.
• 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)

[BillLeoutsakosvl346]

@greptile

[BillLeoutsakosvl346]

@cubic-dev-ai review this PR

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1 Skipped Deployment

Project	Deployment	Actions	Updated
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[cubic-dev-ai]

@cubic-dev-ai review this PR

@BillLeoutsakosvl346 I have started the AI code review. It will take a few minutes to complete.

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge because the shared components preserve the existing interaction semantics and provide the intended action geometry and styling.

Summary

This PR standardizes the custom-block icon actions on shared EMCN controls.

• Replaces the Upload/Change Button with an outlined Chip while preserving callbacks and guards.
• Converts Remove to the established ghost icon Button treatment.
• Aligns both actions vertically beside the existing preview.

_{Reviews (1) · Last reviewed commit: "improvement(ui): reuse chips for custom ..."}

[cubic-dev-ai]

No issues found across 1 file

Confidence score: 5/5

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

_{Re-trigger cubic}

[cubic-dev-ai]

No issues found across 1 file

Confidence score: 5/5

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

_{Re-trigger cubic}