ui work phase 1

docs/data/en/components.md

@@ -18,6 +18,16 @@ python ctrl/spr.py publish soleprint-ui <target>
 
 The target project receives the built files and commits them directly. No npm dependency on spr.
 
+To give a project only the parts it uses — readable source, not the whole
+library — slice it instead:
+
+```bash
+make ui scan <app-dir>                # what it uses, and how its copy compares with spr
+./ctrl/ui.sh slice <app>/ui.toml      # write the slice its run file describes
+```
+
+See [Export / Compile](#export) for run files, the two deliveries and drift.
+
 ## soleprint-modelgen
 
 Model generator. Reads schema definitions and produces model files.