Server-Side when show toast on Delete Toast With Action Support

I want to show a server-side success message (triggered from middleware / loader / action) when a delete operation succeeds, and also provide an Undo action in the toast.

how can i do that?

No files, tests, or entry points are named. Start by tracing the server-side toast flow for Remix loaders, actions, and middleware, then inspect how delete operations are represented. Done should include a defined way to show a success toast after deletion and expose a working Undo action.

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