Preview descriptive book destinations with Ponder

docs/PORTING.md

@@ -152,6 +152,10 @@ dimensions and create a bound Return Link to the source on successful travel.
 Version 0.2.1 gives Descriptive Books the same open-parchment layout and
 left-page link interaction as Linking Books.
 
+Version 0.2.2 adds the same server-provided Ponder destination preview to
+Descriptive Books. If no snapshot is available, the left page shows an
+animated linking-panel fallback.
+
 The preview code is separated behind a renderer interface and uses an isolated
 Ponder level populated from server-authoritative destination snapshots.