Core: Prevent clipping box shadow on file search modal

The box shadow on the file search modal was being clipped on the sides:

Overriding overflow: hidden fixes this and is safe to do because the inner ModalChild wrapper already does that.

Checklist for Contributors

Testing

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

[ ] stories
[ ] unit tests
[ ] integration tests
[ ] end-to-end tests

Manual testing

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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-storybook/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

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

_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>_

name	before	after	diff	z	%
createSize	0 B	0 B	0 B	-	-
generateSize	78.1 MB	78.2 MB	51.9 kB	1.28	0.1%
initSize	143 MB	143 MB	51.9 kB	1.3	0%
diffSize	65.1 MB	65.1 MB	23 B	1.42	0%
buildSize	6.88 MB	6.88 MB	23 B	1.74	0%
buildSbAddonsSize	1.51 MB	1.51 MB	0 B	-	0%
buildSbCommonSize	195 kB	195 kB	0 B	-	0%
buildSbManagerSize	1.9 MB	1.9 MB	23 B	1.73	0%
buildSbPreviewSize	271 kB	271 kB	0 B	-	0%
buildStaticSize	0 B	0 B	0 B	-	-
buildPrebuildSize	3.88 MB	3.88 MB	23 B	1.73	0%
buildPreviewSize	3 MB	3 MB	0 B	1.73	0%
testBuildSize	0 B	0 B	0 B	-	-
testBuildSbAddonsSize	0 B	0 B	0 B	-	-
testBuildSbCommonSize	0 B	0 B	0 B	-	-
testBuildSbManagerSize	0 B	0 B	0 B	-	-
testBuildSbPreviewSize	0 B	0 B	0 B	-	-
testBuildStaticSize	0 B	0 B	0 B	-	-
testBuildPrebuildSize	0 B	0 B	0 B	-	-
testBuildPreviewSize	0 B	0 B	0 B	-	-

name	before	after	diff	z	%
createTime	8.2s	23.2s	14.9s	1.47	🔺64.5%
generateTime	25.5s	22.2s	-3s -254ms	-0.21	-14.6%
initTime	17.6s	14.8s	-2s -888ms	-0.66	-19.5%
buildTime	8.7s	9.5s	732ms	0.56	7.7%
testBuildTime	0ms	0ms	0ms	-	-
devPreviewResponsive	6.5s	6.3s	-197ms	0.25	-3.1%
devManagerResponsive	4.4s	3.9s	-532ms	-0.04	-13.6%
devManagerHeaderVisible	604ms	564ms	-40ms	-0.63	-7.1%
devManagerIndexVisible	693ms	599ms	-94ms	-0.9	-15.7%
devStoryVisibleUncached	1.1s	819ms	-360ms	-0.88	-44%
devStoryVisible	686ms	598ms	-88ms	-0.82	-14.7%
devAutodocsVisible	577ms	521ms	-56ms	-0.39	-10.7%
devMDXVisible	558ms	549ms	-9ms	0.01	-1.6%
buildManagerHeaderVisible	682ms	706ms	24ms	1.07	3.4%
buildManagerIndexVisible	704ms	712ms	8ms	0.95	1.1%
buildStoryVisible	680ms	703ms	23ms	1.06	3.3%
buildAutodocsVisible	478ms	480ms	2ms	-0.07	0.4%
buildMDXVisible	511ms	472ms	-39ms	-0.15	-8.3%

Greptile Summary

Fixed box shadow clipping in the file search modal by modifying overflow behavior in the styled modal component.

Modified code/core/src/manager/components/sidebar/FileSearchModal.tsx to set overflow: 'visible' on ModalStyled component
Change is safe as inner ModalChild wrapper maintains overflow control
Resolves visual issue where modal box shadow was being cut off on sides

storybookjs / storybook