feature: FDI tooth chart UI updated.

frontend/src/components/ui/treatment/toothGlyphStructural.ts

@@ -0,0 +1,15 @@
+import type { ToothShapeKind } from '@/components/treatment/fdiToothMeta';
+
+/** Inner “shell” contours: scaled copies of closed paths (wireframe). */
+export function wireframeInnerScale(kind: ToothShapeKind): number {
+  if (kind === 'molar') return 0.9;
+  if (kind === 'premolar') return 0.88;
+  if (kind === 'canine') return 0.87;
+  return 0.85;
+}
+
+/** Approximate transform origin per region for scaled wireframe rings. */
+export function wireframeOriginY(part: 'crown' | 'root', kind: ToothShapeKind): number {
+  if (part === 'crown') return kind === 'canine' ? 16 : 18;
+  return kind === 'molar' ? 50 : kind === 'premolar' ? 46 : 48;
+}