Name Customization: Not possible to use logic (concat string, helper functions etc.)

[ttristan]

Is your feature request related to a problem? Please describe.
I would like to streamline story namespaces using the Name Customization feature. However, it does not seem to be possible to use any logic exporting a story title.

Doing so a blank page is shown an I get this error in the browser console:

Uncaught SyntaxError: The requested module '/generated/generated-list.tsx' does not provide an export named 'storySource' (at source.tsx:6:1)

Working Example:

export default {
    title: 'Core / Button',
};

Broken Exmaples:

export default {
    title: 'Core' + ' / ' + 'Button',
};

or 

export default {
    title: `${'Core'} / ${'Button'}`,
};

My usecase:

// utils.ts
const getStoryName = (namespace: 'Core' | 'Features', componentName: string) =>
    `${namespace} / ${componentName}`;

// button.story.ts
export default {
    title: getStoryName('Core', 'Button'),
};

[tajo]

Story names need to be static (simple strings). It's the intentional limitation of Ladle to support automatic code-splitting and some other features. It seems there might be some regression in the error message that's makes it unclear - should look into it. Also, we should probably highlight this more in the docs.