fix(react): src/index.test.js fails on develop due to missing swiper/element/bundle module

Bug Report

Summary

src/index.test.js fails to run on the develop branch and has been broken before any recent changes. This is a pre-existing issue unrelated to any feature work.

Steps to Reproduce

cd packages/react
npx jest src/index.test.js --no-coverage


Cannot find module 'swiper/element/bundle' from 'src/views/ImageGallery/Swiper.js'

Require stack:
  src/views/ImageGallery/Swiper.js
  src/views/ImageGallery/ImageGallery.js
  src/views/AttachmentHandler/ImageAttachment.js
  src/views/AttachmentHandler/Attachment.js
  src/views/AttachmentHandler/Attachments.js
  src/views/AttachmentHandler/index.js
  src/views/Message/Message.js
  src/views/MessageAggregators/common/MessageAggregator.js
  src/views/MessageAggregators/MentionedMessages.js
  src/index.test.js


Root Cause

swiper/element/bundle is not installed in [node_modules](vscode-file://vscode-app/c:/Users/vigne/AppData/Local/Programs/Microsoft%20VS%20Code/61b3d0ab13/resources/app/out/vs/code/electron-browser/workbench/workbench.html) at test time, so Jest cannot resolve it when loading the full component tree through src/index.js. There is also no jest.config.js or moduleNameMapper stub to mock it out during tests.

Expected Behaviour

npx jest --no-coverage should pass without failing due to a missing or unresolvable package.

Start in packages/react with npx jest src/index.test.js --no-coverage, then trace the require stack from src/index.test.js to src/views/ImageGallery/Swiper.js. Check how the swiper/element/bundle import is resolved during tests and verify that the full test command completes without a missing-module failure.