[bug] args defined in exports are not inherited by other stories without defining decorators

[jrson83]

Describe the bug

When defining args in a *.stories.tsx default export, but not defining decorators, the args are not applied to the default export and are not inherited by other stories in the file.

When defining args in any stories export, but not defining any decorators, either in default export, or the stories export, the args are not applied to the exported story itself.

Reproduction

1. Clone the repo
2. Run pnpm i
3. Open buttons.stories.tsx in the docs package
4. Remove all decorators defined in all stories
5. Run pnpm dev
6. See the default args children are not passed to the component story

Environment

• OS with version: Windows 11
• Browser with version: Firefox 117.0.1 & Chrome 119.0.6023.0 canary
• JS Runtime with version: NodeJS v20.2.0