Crash on launch when markdown file is open and focused

[apoapostolov]

Bug Report

Meo markdown visualizer crashes with a service worker error when VS Code launches with a markdown file already open and focused.

Steps to Reproduce

1. Have a markdown (.md) file open in VS Code
2. Ensure the markdown file tab is focused/active
3. Quit VS Code
4. Relaunch VS Code
5. The markdown file is restored as open on startup
6. Meo attempts to load the visualizer

Expected Behavior

Meo should load normally and display the markdown visualizer without errors.

Actual Behavior

Meo crashes and displays a toast notification:

Additional Context

The error suggests the service worker registration is attempting to run before the document is fully initialized when VS Code restores the editor state on startup.

Note: This issue may be related to having a large number of extensions installed (tested with ~51 extensions). The service worker registration timing conflict could be exacerbated by VS Code's startup time when many extensions are loading simultaneously.

[vadimmelnicuk]

@apoapostolov Thanks for the detailed report and the note about the extension count, that context was helpful. I've addressed this startup timing issue in 0.1.20, so please give it a try and let me know if you still see the crash.