ui exporting and docgen testing

docs/data/en/components.md

@@ -28,6 +28,11 @@ make ui scan <app-dir>                # what it uses, and how its copy compares
 
 See [Export / Compile](#export) for run files, the two deliveries and drift.
 
+**Reference:** [UI reference](#ui-reference) — every export's props, models, emits,
+slots, closure, packages and tokens, generated from the source by `make reference` in
+`soleprint/common/ui` (which also has `make check`: typecheck, tests, reference current,
+parts in agreement). Hand-written notes live beside the library in `common/ui/notes/`.
+
 ## soleprint-modelgen
 
 Model generator. Reads schema definitions and produces model files.