Asset editors crash on Statamic 6: container.site.value is undefined (assets have no site)

[jakobploens]

Summary

On Statamic 6, opening any asset editor throws and the editor's fields never render:

Uncaught (in promise) TypeError: can't access property "replaceAll", this.container.site.value is undefined

Cause

resources/js/Workspace.js builds the presence channel from the container's site:

this.channelName = `${reference}.${this.container.site.value.replaceAll('.', '_')}`;

Assets are not site-scoped, so the asset publish-container has no site → container.site.value is undefined → it throws during workspace init (the component's mounted hook), aborting the editor render.

resources/js/collaboration.js guards reference but not site:

Statamic.$events.$on('publish-container-created', container => {
    if (!container.reference.value) return;   // no site guard
    manager.addWorkspace(container);
});

The same unguarded access is also in initializeContainerWatcher().

Steps to reproduce

1. Statamic 6 + statamic/collaboration 2.0.1, a single-site install.
2. Open any asset editor: /cp/assets/browse/{container}/{path}/edit.
3. The editor's fields don't render; the console shows the TypeError above.

Confirmed on multiple containers (a local disk container and a custom-disk container), so it's not container-specific — it affects all asset editing.

Suggested fix

Skip the workspace when there's no site (collaboration on assets isn't meaningful — the channel name requires one), e.g. in the publish-container-created handler:

if (!container.reference.value || !container.site?.value) return;

or guard/default container.site.value in Workspace.initializeEcho() (and the watcher).

Environment

• statamic/cms 6.20.1
• statamic/collaboration 2.0.1
• Single-site install