fix: remove reopen payment window button

[broody]

Removes the "REOPEN PAYMENT WINDOW" button and its associated handleRetryPopup logic from the Coinbase checkout screen. Users can navigate back to reinitiate the payment flow instead.

The "TRY AGAIN" button on the failure state now calls handleContinue to reopen the popup.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
controller-example-next	Ready	Preview	Feb 25, 2026 11:04pm
keychain	Ready	Preview	Feb 25, 2026 11:04pm
keychain-storybook	Ready	Preview	Feb 25, 2026 11:04pm

[claude]

Claude finished @broody's task —— View job

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Documentation Analysis Complete

• Analyze changed files to understand user-facing impact
• Search docs repository for Coinbase payment documentation
• Determine if documentation updates are required
• Final assessment

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Analysis Summary

After reviewing the PR changes and the existing Coinbase onramp documentation, I've determined that no documentation updates are required.

Reasoning

1. Internal UI Refinement: The PR removes a "REOPEN PAYMENT WINDOW" button from the keychain's internal UI. This is an internal implementation detail of how the payment popup is managed, not a change to the Controller SDK API or user-facing functionality.

2. No Behavioral Change: The payment flow remains the same from a user perspective:

   • Users still select Coinbase onramp as a payment method
   • A popup still opens for payment processing
   • On failure, users can still retry (now via the "TRY AGAIN" button or by navigating back)
   • The existing documentation accurately describes the user experience flow

3. Debug Logging Only: Most of the diff consists of added console.log statements for debugging postMessage communication. These are developer tools, not user-facing changes.

4. Documentation Scope: The Coinbase onramp documentation describes the high-level user experience flow (selection, compliance check, cost breakdown, payment processing, etc.). The removal of a specific button in the keychain UI doesn't affect this documented flow.

5. Adherence to Rules: Following the instruction to "DEFAULT TO NO CHANGES" - this is exactly the type of internal refactor/UI polish that does not warrant documentation updates. The canonical information about Coinbase onramp user experience remains accurate.

Conclusion

The PR is an internal implementation improvement that simplifies the payment retry UX without changing the documented functionality. No updates to the docs repository are needed.

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