Presentation with magic-move: lz-string doesn't provide an export named: 'default'

[EduKav1813]

Describe the bug

I have issues when running my presentation with the magic-move feature.

• The slide fails to load and displays the "An error occurred on this slide. Check the terminal for more information.".
• The browser console gives the following error message: "slide failed to load SyntaxError: The requested module 'http://localhost:3031/slidev-template/node_modules/lz-string/libs/lz-string.js?v=57f97925' doesn't provide an export named: 'default' slides:20:23"

Minimal reproduction

Steps to reproduce the behavior:

I am using custom theme as a submodule: https://github.com/3mdeb/slidev-template

1. git clone https://github.com/3mdeb/slidev-template.git - clone the custom template

2. Create the file slides.md with the following content:

        ---
       theme: ./slidev-template/theme
       layout: cover
       background: /intro.png
       class: text-center
       ---
       
       # Hello World
       
       Hello World
       
       ---
       style: |
         --slidev-code-font-size: 16px;
       ---
       
       ````md magic-move
       ```js
       console.log(`Step ${1}`)
       ```
       ```js
       console.log(`Step ${1 + 1}`)
       ```
       ```ts
       console.log(`Step ${3}` as string)
       ```
       ````
   

3. cd slidev-template - go to the template directory

4. npm install @slidev/cli@latest - update to latest slidev.

5. ./scripts/local-preview.sh ../slides.md - This script creates virtual environment and installs dependencies, then starts the presentation.

6. In the presentation, go to the next slide (with magic-move).

Expected result:
Presentation works normally, code changes via the magic-move.

Actual result:

• The slide fails to load and displays the "An error occurred on this slide. Check the terminal for more information.".
• The browser console gives the following error message: "slide failed to load SyntaxError: The requested module 'http://localhost:3031/slidev-template/node_modules/lz-string/libs/lz-string.js?v=57f97925' doesn't provide an export named: 'default' slides:20:23"

Environment

• Slidev version: v51.6.0 (latest)
• Browser: Firefox
• OS: Fedora Linux 41