Upgrade mui packages to v9 (material-renderers)

[AirBorne04]

I have upgraded the @mui/* packages to the latest ^9 version and adjusted for changes of component api and tests to properly pass.

There are two components where I would require feedback:

1. changes to components where the api changed more than just prop names:
   a. packages/material-renderers/src/additional/ListWithDetailMasterItem.tsx
   b. packages/material-renderers/src/layouts/ExpandPanelRenderer.tsx

Please let me know, if there is anything else I should adjust,
Daniel

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[lucas-koehler]

Hi @AirBorne04 , thanks for the contribution ❤️
There are some lint errors reported by this build: https://github.com/eclipsesource/jsonforms/actions/runs/26755183304/job/80061183345?pr=2588

Regarding the ExpandPanelRenderer: The Grid changes look reasonable. I just wonder whether we really need the component='div' for the IconButtons. Is this recommended when migrating to MUI 9 and/or is there another reason we need to specify this explicitly?

Regarding the:
The master item itself containing the Delete button looks good in the examples. Thus, I think the change is fine to remove the deprecated ListItemSecondaryAction.
However, the detail itself seems to be broken now (e.g. the Customer group should be below the 2. The layout does not work as expected. I assume this is caused by another component though

Compare to how it looks on master:

[AirBorne04]

@lucas-koehler thank you for taking a look at the PR, i have fixed the lint errors.

regarding the component='div', the reason is that React was complaining about Button elements nested into Button elements and that is illegal html nesting. I was not sure though which higher level element actually was the Button and did not yet investigate that.

i will take a look at the layout in the grid, as soon as i get a chance.

[lucas-koehler]

@AirBorne04 For our planning, do you plan to continue working on this?