Allow automation/script creation directly from clipboard

[jpbede]

Proposed change

Imagine you copied a automation or script YAML and want to create a new automation from it, you would have to create a new automation/script, switch to YAML mode, paste it and maybe switch back, if you want have the UI mode.
This PR adds now the ability to detect automation/script YAML in the clipboard and provide a option when creating a automation/script to directly create one from it.

Only downside on this, it only works in a secure context, or at least on Chrome when giving the clipboard permission manually.

Bildschirmaufnahme.2025-03-04.um.20.14.42.mov

[karwosts]

It makes me a little uncomfortable that this means that anyone who visits the automation editor will get a browser popup saying that home-assistant wants permission to scan your clipboard, whether they use this feature or not. Just feels a bit icky to me.

[jpbede]

Hm we could make this an opt-in feature, so the user would know why they gets this pop up. What do you think?

[karwosts]

I think that would likely be reasonable, but I'll leave further comments to the UX people.

I think you can pre-query if you have permission, so maybe something like this in the popup (just an idea):

permission = queryPermission()

if(permission = prompt) {
  <list-item
    @onclick = scanClipboardForAutomation() && importFromClipboard()
  >
     Paste From Clipboard
     Home Assistant will request permission to read your clipboard.
  </list-item>
} else if (permission == granted && scanClipboardForAutomation()) {
   <list-item
     @onclick = importFromClipboard()
   >
     Paste From Clipboard
     Paste an automation from your clipboard
  </list-item>
} else if (permission == denied) {
   nothing
}

That only has the downside for people in the prompt category, that it adds a mostly useless item to the list when you don't have anything in the clipboard.