Phase 7A UI placement correction — 0.0.18.4

User requirement:
- The dedicated Create World button must be named "Phayriosis".
- It must sit exactly beneath the vanilla Allow Cheats / Allow Commands control.
- It must not overlap footer, corner, Create, Cancel, or other controls.

Implementation:
- During ScreenEvent.Init.Post for CreateWorldScreen, enumerate the screen listener list.
- Locate the real AbstractWidget whose rendered label contains "Allow Cheats" or "Allow Commands".
- Copy that widget's X coordinate and width.
- Place Phayriosis at anchorY + anchorHeight + 4 pixels, height 20.
- This is layout-relative rather than screen-edge-relative and therefore survives GUI scaling/resizing better.
- A centered fallback exists only if an unusual screen replacement/localization prevents discovery.

Do not regress to fixed screen corners or footer-relative placement; both approaches overlapped other controls in testing.
