feat: Add unitests for BrowserToolkit

[JoyceXu02]

Description

Added some unitests for BrowserToolkit, and updated a safer url extractor.

Checklist

Go over all the following points, and put an x in all the boxes that apply.

• I have read the CONTRIBUTION guide (required)
• I have linked this PR to an issue using the Development section on the right sidebar or by adding Fixes #issue-number in the PR description (required)
• I have checked if any dependencies need to be added or updated in pyproject.toml and uv lock
• I have updated the tests accordingly (required for a bug fix or a new feature)
• I have updated the documentation if needed:
• I have added examples if this is a new feature
  Partially fixed [Feature Request] Enhance BrowserToolkit #1752
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[Wendong-Fan]

thanks @JoyceXu02 's contribution! We’ve merged a PR that also updates the unit tests and example code. Could you review the current implementation and integrate your work with the existing one? Sorry for the inconvenience

[Wendong-Fan]

thanks @JoyceXu02 , left comments below, also please pay attention to pre-commit check in cicd, now there's something need to be fixed

[Wendong-Fan]

seems urllib.parse.urlparse() returns a ParseResult object, and calling str(parsed_url) will convert the entire object to a string representation, not just the path componen, this will likely not give the expected result?

[JoyceXu02]

Thanks @Wendong-Fan, I updated url_name assignment.

[JoyceXu02]

thanks @JoyceXu02 , left comments below, also please pay attention to pre-commit check in cicd, now there's something need to be fixed

thanks @Wendong-Fan, pre-commit check has passed on my side.

[Wendong-Fan]

thanks @JoyceXu02 for the contribution!