fix: update wallet rejection errors in swap widget

[ted-palmer]

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Project	Deployment	Actions	Updated (UTC)
relay-sdk-demo	Ready	Preview, Comment	Jul 10, 2026 8:30pm

[github-actions]

Claude finished @ted-palmer's task in 27s —— View job

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Code Review

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Code Review — No issues found.

Reviewed 2 files, 8 lines changed. Checked for correctness, security, error handling, and repo guidelines compliance.

The change broadens wallet-rejection detection in SwapWidgetRenderer.tsx:798-801 by (1) matching the shorter substring 'reject' instead of 'rejected' and (2) lowercasing the error text before comparison. This correctly captures more wallet variants ("Reject", "User Rejected the request", "rejecting", etc.) that previously slipped through the case-sensitive 'rejected' check and fell into the generic error path. Logic and short-circuit ordering are preserved, and the changeset (patch to @relayprotocol/relay-kit-ui) matches the scope of the fix.

[github-actions]

Claude finished @ted-palmer's task in 27s —— View job

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📝 Docs Drift Check — No docs impact

This PR does not touch surfaces that require a relayprotocol/relay-docs update.