ui(icons): resolve dead QueryaIconSizes.sduiNode token

[ZhuchkaTriplesix]

Parent

Part of epic #490.

Problem

QueryaIconSizes.sduiNode (16) is documented/tested as the SDUI node size, but SduiTreeBuilder uses treeGroup / treeLeaf (13/12). Token is unused — “16px SDUI” claim unmet.

Proposal

Either:

1. Use sduiNode in SduiTreeBuilder, or
2. Drop/rename the token and update tests to match intended hierarchy

Files

• lib/core/ui/querya_icon_sizes.dart
• lib/core/sdui/sdui_tree_builder.dart
• test/core/ui/querya_icons_test.dart

Acceptance

• Token and call sites agree (no dead size constant)
• Tests match real sizes

[ZhuchkaTriplesix]

Shipped on dev (PR targeted dev, auto-close did not fire).