e2e: Testing different public API providers

[blenbot]

What kind of change does this PR introduce?

Test improvement / E2E test coverage
Issue Number:
#442

If relevant, did you update the documentation?

Not applicable (test-only change)

Summary

This PR adds end-to-end tests to cover public API provider selection and response validation in the Caravan coordinator.

Previously, selecting and switching between public Bitcoin client providers (Mempool.space, Blockstream.info) was not covered by E2E tests, and live API response shapes were only validated against mocked data in unit tests. This change ensures that:

• Public provider radio buttons are enabled and Mempool.space is the default on mainnet
• Selecting Mempool or Blockstream correctly updates the UI and hides private client settings
• Switching between Mempool, Blockstream, and Private providers behaves correctly across transitions
• Live fee estimate responses from Mempool.space and Blockstream.info match the expected shapes that BlockchainClient depends on
• Live address data from Mempool.space returns the chain_stats/mempool_stats structure used by getAddressStatus

Does this PR introduce a breaking change?

No

Checklist

• I have tested my changes thoroughly.
• I have added or updated tests to cover my changes (if applicable).
• I have verified that test coverage meets or exceeds 95% (if applicable).
• I have run the test suite locally, and all tests pass.
• I have written tests for all new changes/features
• I have followed the project's coding style and conventions.
• I have created a changeset to document my changes (npm run changeset)

Other information

nothing much

Have you read the contributing guide?

Yes

For information on creating and using changesets, please refer to our documentation on changesets.

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Latest commit: 0ca796b

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Project	Deployment	Actions	Updated (UTC)
caravan-coordinator	Ready	Preview, Comment	Feb 15, 2026 7:01am

[blenbot]

@Legend101Zz @bucko13 please review, thanks!