wip(0.S1, 0.S2): state records, mut and read-only state parameters, entry injection, module var refused; ludic migrate state

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

selfhost/check/check_expr.ludic

@@ -70,6 +70,7 @@ function ck_id(e: Node) -> pointer {
   if li >= 0 { return ck_tys[li] }
   let g = ck_global(e.s)
   if g != null {
+    mg_ref(e, g)
     ck_vis(g, e.s, e)
     return g.ty
   }