Smart picker issues when opened from Text

We get `TypeError: link.sub.notify is not a function` in some occasions when opening the smart picker in Text. <img width="509" height="315" alt="Image" src="https://github.com/user-attachments/assets/9b582545-f2a1-4808-b37d-6488da739d5d" /> The stack points to https://github.com/nextcloud/text_templates/blob/feat/vue3/src/views/TemplateCustomPickerElement.vue#L139 which is just an affectation to a data prop. It seems like the upper Vue context of the Text app is complaining about what the Vue 3 picker component does. ### Steps to reproduce the issue with the text_templates app * Context: Use the master branch of server and text. Use the `feat/vue3` branch of text_templates. Build the text_templates assets with npm * Go to the personal settings, in the `Additional settings` section, add at least one text template * Open a text file with Text * Type `/text` and select the `Text templates` * Check the browser console @ShGKme It reminds me of something we discussed a while back but I can't remember the details. I think it was related with build options and nested Vue instances. At the time, the nc/vue lib was still in Vue 2 and Text as well. Now text_templates is using `@nextcloud/vue` 9 but Text is still using Vue 2 and `@nextcloud/vue` 8. cc @janepie