IViewService, IFileService, and IChartService move from
Schaad.Accounting.Common/Interfaces/ to
Schaad.Accounting.Services/Interfaces/. Namespaces are unchanged, so
no consumer needs a using update. Common's vendor <Reference
Include="Schaad.Finance.Api"> can be dropped, matching Common's
documented role as the shared models/DTOs/interfaces layer.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
