[accordion] slotProps.transition is not type-safe

[rodrigofariow]

Steps to reproduce

Steps:

1. https://stackblitz.com/edit/yo5pd4kq?file=src%2FDemo.tsx
2. Insert a random prop name in slotProps.transition
3. You can see typescript does not validate it. It only acts as an autocomplete

Current behavior

slotProps.transition is not type safe

Expected behavior

slotProps.transition should be fully type safe, like other slotProps

Context

No response

Your environment

System:
OS: Linux 6.6 Ubuntu Resolute Raccoon (development branch) 26.04 (Resolute Raccoon)
Binaries:
Node: 25.8.1 - /home/rodrigofaria/.nvm/versions/node/v25.8.1/bin/node
npm: 11.11.0 - /home/rodrigofaria/.nvm/versions/node/v25.8.1/bin/npm
pnpm: 10.33.0 - /home/rodrigofaria/.nvm/versions/node/v25.8.1/bin/pnpm
Browsers:
Chrome: 143.0.7499.109
Firefox: Not Found
npmPackages:
@emotion/react: 11.14.0 => 11.14.0
@emotion/styled: 11.14.0 => 11.14.0
@mui/icons-material: 7.3.9 => 7.3.9
@mui/lab: 7.0.1-beta.23 => 7.0.1-beta.23
@mui/material: 7.3.9 => 7.3.9
@mui/system: 7.3.9 => 7.3.9
@mui/types: 7.4.12 => 7.4.12
@mui/utils: 7.3.9 => 7.3.9
@mui/x-data-grid: 8.28.1 => 8.28.1
@mui/x-data-grid-generator: 8.28.1 => 8.28.1
@mui/x-data-grid-premium: 8.28.1 => 8.28.1
@mui/x-data-grid-pro: 8.28.1 => 8.28.1
@mui/x-date-pickers: 8.10.2 => 8.10.2
@mui/x-date-pickers-pro: 8.10.2 => 8.10.2
@mui/x-license: 8.10.2 => 8.10.2
@mui/x-tree-view: 7.28.1 => 7.28.1
@types/react: 19.2.14 => 19.2.14
react: 19.2.4 => 19.2.4
react-dom: 19.2.4 => 19.2.4
styled-components: 5.3.5 => 5.3.5
typescript: 5.9.3 => 5.9.3

Search keywords: slotProps, transition, type-safe

[github-actions]

This issue has been closed. If you have a similar problem but not exactly the same, please open a new issue.
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