Subservice option`Default` value is added and `None` is removed when a new subservice is added
- Dominant language
- C#
- Stars
- 135
- Forks
- 260
- Avg merge
- 3d 1h
- Merged PRs (30d)
- 143
Description
Found in SDK Review meeting:
When the app is loaded and a service is selected, the subservice field appears and here is how it looks:

After adding a new subservice, `None` disappears and `Default` is added

Contributor guide
Research direction
Reproduce the subservice selection flow described in the issue and compare the options before and after adding a subservice. Identify the relevant code through the UI entry point; done means the option list retains the intended None/Default behavior consistently.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100