Closes #26991

What I did

When @storybook/nextjs configures the SWC loader, it updates the raw loader rule to exclude __barrel_optimize__ requests, which pertain to Next's optimizePackageImports feature. For example, in a project using @mui/material, a resource may look like

__barrel_optimize__?names=Box,Button,Divider,Drawer,List,useMediaQuery,useTheme!=!./node_modules/.pnpm/@mui+material@5.15.15_@emotion+react@11.11.4_@types+react@18.3.1_react@18.3.1__@emotion+style_6tay2ra76drsmamcoqb5ygip6u/node_modules/@mui/material/index.js

and the Drawer here would match the /raw/ test, preventing the resource from being loaded correctly.

We could also just update the raw rule accordingly, but I figured since this is specific to Next.js and SWC, I put the logic in the configureSWCLoader function.

Checklist for Contributors

Testing

Looking for guidance on how you'd prefer this change be covered. I've tested this using a storybook that's using @storybook/nextjs and @mui/material with a story that uses the Drawer component. Would you prefer to have an integration test for this specific scenario?

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

There is a reproduction in #26991 (https://github.com/11bit/next-storybook-import-raw-bag) that could be used to confirm this story loads with these changes.

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

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core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=<PR_NUMBER>