P1B: Refactor (packages/tui/src/ui/spinner.ts:25): Function with many returns (count = 6)

### Uniqueness check

- [x] I have searched open issues and confirmed this **file + smell** is not already taken.

### Full path to the Typescript file

packages/tui/src/ui/spinner.ts

### Function(s)/scope targeted

getScannerState

### Relevant Qlty output

```shell
packages/tui/src/ui/spinner.ts
  25  Function with many returns (count = 6): getScannerState
```