Standardize API call handling in frontend

Good idea. I think just to suppress generic handling makes most sense, because the specific handling will be bespoke things that can't be done by a notification system (e.g. displaying a loader icon next to a search input).

I can imagine a case where I might want to inspect an error and handle it myself if it is one type of error, but let the notification system handle it otherwise. I guess the simplest thing then would be to suppress the automatic handling, inspect the error, and manually call the notification system with the action if it was not an error I wanted to handle.

We could use the meta field in action. Either to suppress generic handling or to indicate specific location/handling.

In general we should be using the information from the request action to show the users that an action is in progress, which will often be specific to an area of the UI (e.g. showing some 'searching' state with a search box).

For failures we should indicate the failure in a specific location when appropriate, and in a more general notification for anything else. If we have a generic notification on all API requests, we need a way to suppress that for the specific cases that we are displaying differently.