Added panic unwinding error handling to give appropriate errors message

[0xzrf]

Summary

This PR fixes a panic in the surfpool completion bash command caused by calling Option::unwrap() on a None value. Instead of crashing, the command now returns an appropriate error message and exits with a non-zero status code.

Closes #531

🔍 What Changed

• Replace unsafe unwrap() with proper error handling.
• Return a user-facing error explaining the root cause.
• Ensure the command exits cleanly on invalid input rather than panicking.

🧪 How to Test

1. Run:

   surfpool completion bash

Context

The original issue described a panic when running the bash completion command due to an unchecked Option::unwrap(). This caused an abrupt crash without useful feedback to the user. Handling this case explicitly improves stability and user experience. (#531)

Notes

This fix does not add any new features; it improves error safety and observability.

Helps maintain a more robust CLI surface in the Surfpool tool.

[MicaiahReid]

LGTM, thanks @0xzrf