Admin App Context

Generate a full React Admin application using the following instructions.
The result must be a runnable React app (npm start) that connects to the supplied JSON:API, with fully implemented components (no placeholders or empty files).

Critical Data Access Provider Configuration

This project uses a pre-configured JSON:API data provider that was built when the project was created.

Key Requirements:

1. Data Provider: Use the existing jsonapiClient from ./rav4-jsonapi-client/ra-jsonapi-client
2. Record Context: For custom components (like cards), ALWAYS wrap with <RecordContextProvider value={record}>
3. List Data Access: Use useListContext() to get data and loading state
4. Individual Records: Use useRecordContext() to access record data within providers
5. API Root: The data provider connects to conf.api_root (typically http://localhost:5656/api)

Example Pattern for Custom List Views:

import { useListContext, RecordContextProvider, useRecordContext } from 'react-admin';

const CustomGrid = () => {
    const { data, isLoading } = useListContext();

    return (
        <Grid container>
            {data?.map(record => (
                <Grid item key={record.id}>
                    <RecordContextProvider value={record}>
                        <CustomCard />
                    </RecordContextProvider>
                </Grid>
            ))}
        </Grid>
    );
};

const CustomCard = () => {
    const record = useRecordContext();
    return <Card>{record.name}</Card>;
};

CRITICAL: Do NOT create new data providers or modify the existing JSON:API client configuration. The project's data flow depends on the pre-built provider.