chore: remove kbx-foundation-v36 reference (superseded by v4 implementation)

Removed entire kbx-foundation-v36 directory as it's been replaced by
the new KBX Foundation v4 patterns implemented in this session:
- Registry-driven screen definitions
- Density-aware UI adapter components
- Feature module templates (ShadowRun, Models)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

docs/Design/kbx-foundation-v52-fe-operational-navigation-screen-anatomy/apps/web/src/validation/kbxFieldSchema.ts

@@ -0,0 +1,33 @@
+import { z } from 'zod'
+import { getKbxField, type KbxKnownFieldKey } from '@kbx/contracts'
+
+/**
+ * Structural client validation derived from the canonical KBX field dictionary.
+ * Domain/state rules intentionally remain in the Vertical Slice / server Domain.
+ */
+export function kbxTextSchema(key: KbxKnownFieldKey) {
+  const field = getKbxField(key)
+  let schema = z.string().trim()
+  if ('maxLength' in field && typeof field.maxLength === 'number') {
+    schema = schema.max(field.maxLength, `${field.label}은(는) ${field.maxLength}자 이내로 입력하세요.`)
+  }
+  return schema
+}
+
+export function kbxRequiredTextSchema(key: KbxKnownFieldKey, message?: string) {
+  const field = getKbxField(key)
+  return kbxTextSchema(key).min(1, message ?? `${field.label}을(를) 입력하세요.`)
+}
+
+export function kbxNullableEntityIdSchema(key: KbxKnownFieldKey, message?: string) {
+  const field = getKbxField(key)
+  return z.string().nullable().refine(value => Boolean(value), message ?? `${field.label}을(를) 선택하세요.`)
+}
+
+export function kbxDecimalSchema(key: KbxKnownFieldKey) {
+  const field = getKbxField(key)
+  if (!['integer', 'decimal', 'quantity', 'money'].includes(field.dataType)) {
+    throw new Error(`${key} is not numeric in the KBX field dictionary.`)
+  }
+  return z.number()
+}