Fix book screens opening on server thread

docs/PORTING.md

@@ -80,6 +80,10 @@ all changes to its destination and custom name. Descriptive Book Age references
 now carry a display name alongside their stable UUID, with backward-compatible
 decoding for existing UUID-only data.
 
+Version 0.1.5 ensures the book interaction listener opens screens only for the
+logical-client event. This avoids calling the render system from the integrated
+server thread when a book is used in singleplayer.
+
 The preview code is separated behind a renderer interface and uses an isolated
 Ponder level. The first iteration supplies the animated loading boundary; the
 next iteration will add server-authoritative snapshot transport and populate