fix(ui): show workspace readiness dot and bounded session accordions

docs/guida-utente.md

@@ -59,6 +59,15 @@ The workflow phases are fixed:
 
 ## Resume, archive, and the meaning of saved state
 
+In Administration, the dot beside **Workspace** is green when readiness is
+confirmed and red otherwise. Hover the button for the exact state; assistive
+technology receives the same description. Select Workspace to inspect preparation.
+
+The session sidebar has two accordion sections: **Active sessions** starts open,
+**Archive** starts closed. Both can be open together; long lists scroll inside
+their own panels. Here active means not archived, not necessarily a running model
+process. Existing groups and session actions remain inside those sections.
+
 The sidebar lists sessions and their current lifecycle. Resuming returns to the last incomplete
 phase. A finalized or archived session cannot be resumed.