frontend: ActionsNotifier: Adjust keys for snackbars

[skoeva]

This change adds a unique refKey for error states, separate from success states, and creates a unique key for every snackbar. This addresses a regression where failure notifications would not appear in the UI.

Fixes: #2655

Testing

• Click on the "Create" button in Headlamp (either the one in the sidebar or for a resource like ConfigMap) and try to create a resource with an invalid name. Here's some sample YAML:

apiVersion: v1
kind: ConfigMap
metadata:
  name: configmap!
data: {}

• Ensure that before the editor reopens with the error message, a failure notification appears in the bottom left corner

[sniok]

I tried it and error notification leaves really quick and there are error message about duplicated key

Recording.2024-12-13.105714.mp4

I double checked that I'm on the right branch and up to date

➜  headlamp git:(fix-notifications) git pull
Already up to date.
➜  headlamp git:(fix-notifications) git status
On branch fix-notifications
Your branch is up to date with 'origin/fix-notifications'.

nothing to commit, working tree clean

[skoeva]

I tried it and error notification leaves really quick and there are error message about duplicated key

@sniok looks like uniqueKey is not unique enough... 🗿
pushing a fix up now

[joaquimrocha]

LGTM. I tested Olek's case here and it doesn't happen anymore it seems.