fix(content): links written into a memo open in a new window (0.4.2)

[baraline]

Summary

Every link EasyvistaContentConverter.to_transport writes now carries target="_blank" rel="noopener noreferrer", the shape EasyVista's own editor writes on a link. Patch release 0.4.2; reading is unchanged.

Why

EasyVista's memo view opens a link without target="_blank" in place, inside EasyVista's own window, so a link to another application appeared to do nothing. Measured on a live memo (2026-10-07), with three links side by side:

Link as stored	What a click did
<a href="…">	opened in place
<a href="…" target="_blank" rel="noopener noreferrer">	opened a new window
<p>… <a href="…"></p>	opened in place

The memo kept the attributes exactly as sent. A link typed in EasyVista's editor is stored with target="_blank" rel="noopener noreferrer". A pasted one (data-fr-linked, Froala) is stored without them, and it opens in place too.

What changes

• markdown_to_html adds the two attributes to each anchor cmark-gfm writes: href, plus an optional title. That covers plain, titled, autolink and image-inside-a-link links. A link shown as code stays text.
• Reading ignores target and rel, so from_transport(to_transport(m)) is unchanged for every link (new round-trip tests).
• Version 0.4.2 everywhere the release convention puts it: pyproject, __version__, the public-API test, all nine skills, CHANGELOG and its compare link, and docs/content.rst's writing section.

Twin

glpi_python_client renders with the same cmark-gfm call, and its reader is this package's twin. A matching change is being prepared there (0.6.2) so the two keep writing the same HTML. GLPI's own editor also stores links with target="_blank".

Test plan

• Full suite: 2145 passed, 96 skipped (live/integration)
• mypy easyvista_python_client and ruff check . clean
• Mutation: removing the rewrite fails 6 tests, dropping its title branch fails 1
• ruff format --check reports 14 files that already differ on main, none touched here

🤖 Generated with Claude Code

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.93%. Comparing base (59049b6) to head (346fe11).
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #9   +/-   ##
=======================================
  Coverage   98.92%   98.93%           
=======================================
  Files          40       40           
  Lines        2614     2617    +3     
=======================================
+ Hits         2586     2589    +3     
  Misses         28       28           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[baraline]

Twin opened: baraline/glpi_python_client#41 (0.6.2) makes the same change, so both converters keep writing the same HTML.