What's Changed
- Bump trezor-connect-rs from 0.3.3 to 0.3.4
- Map the new ThpError::DeviceLocked to the existing typed TrezorError::DeviceBusy in src/modules/trezor/errors.rs, so a locked device surfaces as the back-off signal apps already understand rather than a generic ConnectionError.
- Add a unit test covering the DeviceLocked -> DeviceBusy mapping.