Normalize update channel handling in debug output

- Resolve prerelease aliases to a single channel value
- Show the active channel and updater manifest in debug UI and logs
- Add tests for channel normalization and labeling
7e3b946eb2Dara Adedeji committed on 4/13/2026, 7:06:31 PMparent719932b

Checks

Some checks failed
5 files changedLine totals unavailable