rm-hull / git-commit-summary / 18959370866

Pull #4

github

refactor: Move spinner logic to UI interface

The spinner implementation is now abstracted behind the `UIClient`
interface, decoupling the core application logic from the underlying
library (`github.com/briandowns/spinner`).

This improves separation of concerns and testability.

*   Introduced `StartSpinner`, `UpdateSpinner`, and `StopSpinner`
    methods on `UIClient`.
*   Implemented spinner management in `internal/ui/client.go`.

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