Fix import shadowing and unchecked type assertions in test

[lucacome]

Proposed changes

Removes shadowing of imports and adds type assertion checks in tests. A separate PR will fix type assertions in code.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

NONE

[codecov]

Codecov Report

Attention: Patch coverage is 79.48718% with 8 lines in your changes missing coverage. Please review.

Project coverage is 89.29%. Comparing base (a2aa4d3) to head (79fc769).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/framework/helpers/helpers.go	25.00%	2 Missing and 1 partial ⚠️
internal/mode/static/manager.go	0.00%	3 Missing ⚠️
internal/mode/static/handler.go	90.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2574   +/-   ##
=======================================
  Coverage   89.29%   89.29%           
=======================================
  Files         100      100           
  Lines        7633     7633           
  Branches       50       50           
=======================================
  Hits         6816     6816           
  Misses        761      761           
  Partials       56       56           

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