fix(assertString): throw typeError on objects with constructor and name property

[newtondividedbysqm]

assertString is currently validating objects with constructor property like {constructor: {name: "String"}}

[Copilot]

Pull request overview

Updates assertString to correctly reject non-string objects that spoof constructor.name as "String", and expands tests to cover the spoofing cases (and boxed strings).

Changes:

• Tighten assertString type checking to allow primitives/boxed strings while rejecting constructor-name spoofed objects.
• Add unit tests for spoofed { constructor: { name: "String" } } inputs.
• Add a unit test ensuring boxed strings (new String(...)) are accepted.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
src/lib/util/assertString.js	Reworks the validation logic to avoid constructor-name spoofing.
test/util.test.js	Adds regression tests for spoofed objects and boxed strings.

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[WikiRik]

Please fix the tests and look through the Copilot comments before we review this

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (9fa1e3a) to head (36b9a11).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2692   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2595      2588    -7     
  Branches       659       657    -2     
=========================================
- Hits          2595      2588    -7     

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