Fix: index not shown when polars is not installed

[mwouts]

Closes #415

[github-actions]

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Also, the version of ITables developed in this PR can be installed with pip:

pip install git+https://github.com/mwouts/itables.git@version_2.4.3

(this requires nodejs, see more at Developing ITables)

[Copilot]

Pull Request Overview

This PR fixes an issue where the DataFrame index was not shown when Polars was not installed by adjusting the _evaluate_show_index logic, adds a test to verify index display, bumps the version to 2.4.3, and updates the changelog.

• Adjust _evaluate_show_index to compare pl against pd so absence of Polars still shows index.
• Add test_get_itable_arguments_with_index to ensure indices are included in data_json.
• Bump version and document the fix in changelog.md.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
tests/test_javascript.py	Added a new test to verify index inclusion when Polars is not installed
src/itables/version.py	Bumped version from 2.4.2 to 2.4.3
src/itables/javascript.py	Updated _evaluate_show_index condition to use pl is not pd
docs/changelog.md	Added 2.4.3 changelog entry for the Polars index fix

Comments suppressed due to low confidence (2)

tests/test_javascript.py:46

• [nitpick] The docstring here doesn't describe the new test’s intent. Consider updating it to explain that this test verifies index display when Polars is not installed.

    As much as possible we want few arguments for the ITable class

docs/changelog.md:8

• [nitpick] Consider rephrasing for clarity, e.g., 'Fixed issue where index was not shown when Polars was not installed.'

- We have fixed an issue with an index not shown when `polars` was not installed ([#415](https://github.com/mwouts/itables/issues/415))

[Copilot]

[nitpick] Add a comment explaining why we're comparing 'pl' to 'pd' here, so future readers understand the aliasing logic when Polars is not available.

Suggested change

	return False
	return False
	# If Polars is not available, `pl` is aliased to `pd`. This check ensures
	# that we correctly handle Polars DataFrames when Polars is available.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.82%. Comparing base (b1a6017) to head (3a279eb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #416      +/-   ##
==========================================
+ Coverage   87.79%   87.82%   +0.03%     
==========================================
  Files          50       50              
  Lines        2007     2012       +5     
==========================================
+ Hits         1762     1767       +5     
  Misses        245      245              

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