react-jsonschema-form Files

@rjsf/core

• Fixed processPendingChange() using originalErrorSchema (which already contains merged extraErrors) as the base for mergeErrors(), causing sibling-field extraErrors to accumulate duplicate entries on every array mutation, fixing #5041
• Added ObjectField test for renaming a nested additionalProperties key using userEvent and reset() via a form ref, verifying fix for #4948
• Updated ArrayField's change handling to only null out data for paths that are directly an array indexed value and not object properties within them, fixing #4952

@rjsf/mui

• Added computeSxProp() helper to utils.ts, ran the MUI v9.0.0/system-props codemod on the directory and then updated the sx changes to use computeSxProps()
• Also transformed the use of style blocks for margins or explicit marginTop or marginBottom in MUI into sx values within DescriptionField, FieldHelpTemplate, ObjectFieldTemplate and SubmitButton,
• Updated snapshots accordingly
• Upgraded the peerDependencies to add support for MUI v9

@rjsf/utils

• Switched deepEquals from lodash.isEqualWith to fast-equals.createCustomEqual with cycle detection enabled, and replaced direct lodash.isEqual usage in useDeepCompareMemo, isRootSchema, and findSelectedOptionInXxxOf with deepEquals, fixing #4291
• Fixed getObjectDefaults re-injecting stale schema-level default keys into an additionalProperties object when formData already contains its own keys (e.g. after a key rename), preventing ghost entries from reappearing, fixing #4948

@rjsf/validator-ajv8

• Cached the most recent rootSchema reference in handleSchemaUpdate so repeated isValid calls with the same root schema skip the deep-equality check and Ajv re-registration, fixing #4291

Dev / docs / playground

• Cleaned up testing to make registry mocks simpler using getTestRegistry() function
• Refactored antd specific test setup out of testing/testSetup.ts
• Updated the Playground to use MUI v9