Separate show cancellation from rendering errors

docs/roadmap/audit/catalog.md

@@ -1,6 +1,6 @@
 # Consolidated audit catalog
 
-Status: **23 distinct open findings: one P2 and 22 P3**, consolidated from 30
+Status: **22 distinct open findings: 22 P3**, consolidated from 30
 numbered entries in seven audit documents. Reviewed audit state:
 `db732e3a1de55c844f77870e1c6db683c2685d5d`.
 
@@ -122,6 +122,11 @@ Also noted in the [documentation cross-references](13-documentation.md#previousl
 
 ## F05 — P2: Configuration-show cancellation is also recorded as a rendering failure
 
+**Complete.** A cancellation checkpoint stops buffered show preparation without
+reporting cancellation as a render error. A regression failed before the fix;
+focused tests now verify no partial output, cancellation identity, and retained
+native rendering errors when both occur.
+
 ckconfig checks cancellation during buffered show preparation inside the
 `RenderOutput` callback. Returning that cancellation from the renderer records
 both the correct operation cause and a false presentation failure, conflating