Disable paste-link-to-quote flow when composing Private Mentions (#36690)

app/javascript/mastodon/actions/compose_typed.ts

@@ -191,7 +191,8 @@ export const pasteLinkCompose = createDataLoadingThunk(
       composeState.get('is_submitting') ||
       composeState.get('poll') ||
       composeState.get('is_uploading') ||
-      composeState.get('id')
+      composeState.get('id') ||
+      composeState.get('privacy') === 'direct'
     )
       return;