Update completed tasks and add more Research links for participant 10billionpercent#261

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10billionpercent wants to merge 9 commits intowagtail:mainfrom

10billionpercent:main

Commits on Mar 31, 2026

Commits on Apr 17, 2026

Merge branch 'wagtail:main' into main
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Mark redesign task as completed for participant 10billionpercent
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Merge branch 'main' of github.com:10billionpercent/gsoc2026
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