fix: content blocks must be used in Grids

[asanehisa]

Existing content blocks not in Grids won't be affected but any new ones dragged in must be dragged into Grids.

Content Blocks like HoursStatus, Address, and other individual components used in Grid.

Screen.Recording.2026-09-24.at.9.26.27.AM.mov

[github-actions]

Warning: Component files have been updated but no migrations have been added. See https://github.com/yext/visual-editor/blob/main/packages/visual-editor/src/components/migrations/README.md for more information.

[coderabbitai]

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Reviewing files that changed from the base of the PR and between 75a0b37 and 247c642.

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• packages/visual-editor/src/components/testing/screenshots/PhotoGallerySection/[desktop] version 59 with showSectionHeading false.png is excluded by !**/*.png, !packages/visual-editor/src/components/testing/screenshots/**

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• packages/visual-editor/src/components/structure/MainContent.tsx

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Walkthrough

MainContentComponent now imports AdvancedCoreInfoCategory. The Content slot’s disallow array adds its entries except “Grid”, while preserving the existing entries.

Priority: ⬇️ Low

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 247c6

New direct placements of individual content blocks into MainContent are restricted while Grid placement and existing content are preserved. No concrete merge risk is established by the remaining screenshot-only change.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly summarizes the main change: requiring content blocks to be placed inside Grids.
Description check	✅ Passed	The description directly explains the Grid requirement, the behavior for existing content blocks, and relevant component examples.

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[benlife5]

huh I thought we had this 🤷

[asanehisa]

huh I thought we had this 🤷

Yeah I think it got weird with MainContent allowing them