T23: README; tasks/acceptance.md holds PRD.md line by line with its evidence; the Ubuntu job installs the libraries gpui links; testlog builds only beside the Unix tests that use it, so clippy passes for Windows; the CI probe steps go

src/lib.rs

@@ -6,7 +6,7 @@ pub mod menus;
 pub mod sessions;
 pub mod settings;
 pub mod term;
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod testlog;
 pub mod themes;
 pub mod workspace;