Expand hardware wallet integration coverage

[Nanle-code]

Summary:
Hardware wallet support is valuable, but the current feature set should be validated more thoroughly to ensure reliability.

Why this matters:
Hardware wallet compatibility matters for real-world developer adoption and security-sensitive workflows.

Proposed work:

• Add test coverage for hardware wallet integration paths
• Validate fallback behavior when hardware dependencies are unavailable
• Improve documentation for supported hardware flows

Acceptance criteria:

• Hardware wallet paths are covered by automated tests
• Failure behavior is clear and predictable
• Contributors can work on this feature with confidence

[mordabdul1]

@mordabdul1 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi, I’m a full-stack Web2 & Web3 developer with open-source contribution experience, and I’d be glad to work on this issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @mordabdul1 to this issue.

[codedmalik]

@codedmalik has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

application to solve this specific issue please

ℹ️ Repo Maintainers: To accept this application, review their application or assign @codedmalik to this issue.