refactor: clean up some config and panic code

[ClementTsang]

Description

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Issue

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Closes: #

Testing

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If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

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• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov]

Codecov Report

Attention: Patch coverage is 91.37931% with 5 lines in your changes missing coverage. Please review.

Project coverage is 41.40%. Comparing base (96ed26d) to head (e9d4183).

Files	Patch %	Lines
src/main.rs	80.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1556      +/-   ##
==========================================
- Coverage   41.41%   41.40%   -0.02%     
==========================================
  Files         113      114       +1     
  Lines       17837    17847      +10     
==========================================
+ Hits         7387     7389       +2     
- Misses      10450    10458       +8     

Flag	Coverage Δ
macos-12	36.73% <8.62%> (-0.08%)	⬇️
ubuntu-latest	43.37% <91.37%> (-0.02%)	⬇️
windows-2019	36.93% <0.00%> (-0.04%)	⬇️

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