fix: resolve broken external links and missing target handling in learning resources (#245)

[mithilP007]

This PR resolves #245 by introducing a robust link helper utility to safely parse and standardize external link handling, registering a custom Jinja filter 'parse_resource' to handle formatting, and updating 'templates/project.html' to render resource links with appropriate target and rel attributes. Additionally, unit tests were added to verify the helper logic.

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Pull request overview

This PR standardizes how project learning-resource links are parsed and rendered so external resources open safely in a new tab with appropriate security attributes.

Changes:

• Added a reusable parse_external_link helper for extracting labels and URLs.
• Registered a parse_resource Jinja filter through the main routes blueprint.
• Updated the project detail template and added helper unit tests.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
utils/link_helper.py	Adds link parsing utility for resource strings.
routes/main_routes.py	Registers the helper as a Jinja template filter.
templates/project.html	Uses parsed link metadata to render resource links safely.
tests/test_basic.py	Adds unit coverage for the new link helper.

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[mithilP007]

Solved under Gssoc2026
you can checkout the change

[komalharshita]

@mithilP007 resolve the merge conflicts

[mithilP007]

Now you can check i have fixed it

[komalharshita]

Thanks for the contribution — improving broken learning-resource links and standardizing external-link handling is a valuable quality improvement for DevPath.

The overall direction of the PR is good, especially because learning resources are a core part of the user experience and inconsistent/broken external links reduce trust in the platform.

What was done well

• Focuses on a real usability issue
• Improves consistency of external-link behavior
• Keeps the scope reasonably targeted
• Helps improve learning-resource reliability
• Aligns well with existing external-link security practices

Important things to verify before merge

• Any use of:

  target="_blank"

  should also consistently include:

  rel="noopener noreferrer"

  for security reasons.

• Please confirm that:

  • all modified links were manually tested
  • no valid existing URLs were accidentally changed
  • internal navigation behavior remains unaffected

• If dataset/resource entries were updated, maintainers should also verify:

  • project pages render correctly
  • recommendation cards still function properly
  • malformed URLs are not introduced

• If not already included, automated validation/tests for external-link handling would be a good addition.

Overall, this is a useful quality-focused fix, but the above verification points should be completed before merge.

[komalharshita]

@mithilP007 kindly resolve the merge conflicts

[komalharshita]

Closing this PR for inactivity. Please open a fresh PR if possible.