Investigate HyperEVM support issue mentioned by operations

[coderabbitai]

Context

Operations team has mentioned concerns about HyperEVM support, potentially related to wallet compatibility or chain switching functionality.

Background

• Issue was mentioned during review of PR feat: make phantom great again hdwallet#771
• Could not be reproduced during recent HyperEVM development and testing
• May be wallet-specific (e.g., Phantom only)
• May have been resolved by recent PRs adding second-class chain support

Investigation needed

• Confirm if the issue still exists with current code
• If reproducible, identify specific wallet(s) affected
• Verify HyperEVM chain switching works correctly
• Test account derivation and transaction flow for HyperEVM

Related

• PR: feat: make phantom great again hdwallet#771
• Comment: feat: make phantom great again hdwallet#771 (comment) (if applicable)
• Resolves: Phantom - missing EVM chains #11410, Phantom - SUI support #11409, Solana account not derived for Phantom #11398

Reported by: @gomesalexandre

[gomesalexandre]

You're drunk, triple issue Mr Rabbit