The previous code computed the path as
Path.Combine(BaseDir, "../../src/Yavsc.Org")
which from `bin/Debug/net10.0/` resolved to a non-existent
`test/yavscTests/src/Yavsc.Org` (two levels up, not four).
Kestrel logged:
"The WebRootPath was not found: ... /wwwroot. Static files
may be unavailable."
The fix walks up the directory tree from BaseDir until it
finds a directory that contains `src/Yavsc.Org`. This is
robust against the test runner changing the current working
directory (which it does: it runs from
`test/yavscTests/bin/Debug/net10.0`, not the repo root).
After this fix, UseStaticFiles correctly resolves the
wwwroot, so static assets under `wwwroot/` are served.
Note: this does NOT make the in-memory WebServerFixture
fully functional. Two pre-existing issues remain:
1. _Layout.cshtml references `~/css/site.css` but the
actual file is now at `~/css/main/site.css` (moved by
commit 31906a78). The .cshtml was not updated.
2. HomeController.Index() throws NullReferenceException
on an empty EF Core InMemory database (no Activities
seeded). UseDeveloperExceptionPage returns a 500 page
that gets caught and re-rendered as 404 by the test
client.
Both will be addressed in follow-up commits.
Tested: dotnet test 11/11 green (existing tests use
Services DI, not HTTP). UI tests not added yet (blocked by
the issues above).