Document Q&A Flow (Structured Stub)

1. Open document-qa-interface.
2. Enter question in SF/QA/QuestionInput/Focused.
3. Submit query and wait in loading state.
4. Review grounded answer card and citation chips.
5. Click citation to inspect source highlight.

Required states:

1. loading
2. empty
3. error
4. populated
5. grounded-refusal