[Bug]: playwright-ct: 'Support for the experimental syntax 'decorators' isn't currently enabled' in spec without tsx code

Nobody has claimed this yet.

### Version

playwright/experimental-react-ct: 1.58.2

### Steps to reproduce

1. Clone https://github.com/fvclaus/playwright-react-ct-with-scss
2. `pnpm i`
3. `pnpm run test-ct:ui`

### Actual behaviour

In `Welcome.spec.tsx`
```ts
import Welcome from '~/welcome/welcome';
import { runTestOnComponent } from './helper';

// TODO Uncomment this to make the error go away
// test('should work', async ({ mount }) => {
// const component = await mount();
// await expect(component).toContainText('React Router');
// });

runTestOnComponent({
name: 'Welcome',
Component: Welcome
})
```
I am currently receiving
```
SyntaxError: app/welcome/welcome.scss: Support for the experimental syntax 'decorators' isn't currently enabled (1:1):

Add @babel/plugin-proposal-decorators (https://github.com/babel/babel/tree/main/packages/babel-plugin-proposal-decorators) to the 'plugins' section of your Babel config to enable transformation.
If you want to leave it as-is, add @babel/plugin-syntax-decorators (https://github.com/babel/babel/tree/main/packages/babel-plugin-syntax-decorators) to the 'plugins' section to enable parsing.
```

In my actual project, I had several implementations of a component that I wanted to pass to a helper function that creates the actual tests. This issue cost me a few hours, because I thought it wasn't supported at first. Admittedly, it is an edge case and can be easily fixed by adding some tsx code to the spec (like the `` above), but it is quite a misleading error message.

### Expected behavior

A better error message, or we can leave it as is. The workaround is straightforward, and I wanted to document it somewhere so it can be easily found.

### Additional context

_No response_

### Environment

```shell
System:
OS: Linux 6.16 Ubuntu 24.04.3 LTS 24.04.3 LTS (Noble Numbat)
CPU: (16) x64 AMD Ryzen 7 2700 Eight-Core Processor
Memory: 15.69 GB / 39.12 GB
Container: Yes
Binaries:
Node: 24.11.1 - /home/fredo/.nvm/versions/node/v24.11.1/bin/node
npm: 11.6.2 - /home/fredo/.nvm/versions/node/v24.11.1/bin/npm
pnpm: 10.28.2 - /home/fredo/.nvm/versions/node/v24.11.1/bin/pnpm
IDEs:
VSCode: 1.106.3 - /snap/bin/code
Cursor: 2.4.21 - /usr/bin/cursor
Languages:
Bash: 5.2.21 - /usr/bin/bash
npmPackages:
@playwright/experimental-ct-react: ^1.58.2 => 1.58.2
```

Reproduce the failure using the linked playwright-react-ct-with-scss project and the test-ct:ui command. Start with Welcome.spec.tsx and the referenced welcome.scss path, then trace how the component test setup reports the syntax error. Done means either a more accurate error message or documentation of the workaround, with a regression test if the repository provides a suitable location.

Written by the indexing model from the issue text.