U15 - Umbraco UI - Customise content editor tabs

Questions
1

I have totally hit a brick wall with the limits of my understanding of the new Lit / Umbraco UI framework. Having scoured the docs and read several articles, i’m still having a hard time piecing together what I need to do.

I would like to be able to tap into the rendering of tabs within content editor views- uui-tab element in the UI framework

I would like to be able to determine the culture of the currently edited language variant of the page, and programatically disable/enable a tab based off this culture.

I’m utterly lost at how to achieve this though. My closest attempt came as far as trying to register a controller that I’d hoped I could access what I needed from, but I’m lost as to what conditions to use.

import { umbExtensionsRegistry } from "@umbraco-cms/backoffice/extension-registry"

const manifest = {
    type: 'disableTabsContext',
    alias: 'DisableTabsContext.Disabler',
    name: 'Disable Tabs Context',
    api: 'disable-tabs.context.js',
    conditions: [
        {
            alias: 'Umb.Condition.WorkspaceAlias',
            match: 'Umb.Workspace.Document',
        }
    ]
};

umbExtensionsRegistry.register(manifest);

The manifest gets regsitered, however, I thnk this condition is wrong and never fires as I can see in Chrome tools Sources tab, that my disable-tabs.context.js never gets loaded.

If anyone could point me in the right direction i’d be eternally grateful!

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/115075-u15-umbraco-ui-customise-content-editor-tabs