runtime, ludic.ui: a scalar Value is one allocation, not three (lists only for a list or an object); layout and cascade lists kept a depth; small numbers' text made once - benchmark 63 -> 36 KB a frame

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

packages/ludic.ui/attr_place.ludic

@@ -1,6 +1,6 @@
 # attr_place.ludic - position and its insets, z-index, overflow, white-space and text-overflow
 function el_place_prop(ui_st: mut UiState, n: UiNode, key: string, v: Val) -> bool {
-  let s = vl_text(v)
+  let s = vl_text_u(ui_st, v)
   if key == "position" {
     n.pos = 0
     if s == "relative" { n.pos = 1 }