fix(test): release Windows search handles

packages/core/src/filesystem/search.ts

@@ -262,9 +262,9 @@ export const layer: Layer.Layer<Service, never, FSUtil.Service | Ripgrep.Service
             basePath: dir,
             frecencyDbPath: path.join(root, `${id}.frecency.mdb`),
             historyDbPath: path.join(root, `${id}.history.mdb`),
-            // fff uses a bit different log version, also with spans so keep
-            // them in the same folder for debuggability
-            logFilePath: path.join(Global.Path.log, "fff.log"),
+            // fff 0.9.3 keeps its process-global log file open until exit, so
+            // disable it in tests to let Windows remove the isolated XDG tree.
+            logFilePath: process.env.NODE_ENV === "test" ? undefined : path.join(Global.Path.log, "fff.log"),
             logLevel: Log.getLevel().toLowerCase() as Lowercase<Log.Level>,
             aiMode: true,
             // only the first toolcall picker can accumulate resources to index