chore: remove kbx-foundation-v36 reference (superseded by v4 implementation)

Removed entire kbx-foundation-v36 directory as it's been replaced by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>

frontend/src/shared/ui/adapter/index.ts

@@ -0,0 +1,45 @@
+/**
+ * KBX UI Adapter - Export all wrapped components
+ * Single boundary: PrimeVue/AG Grid usage restricted to this module
+ */
+
+// Contracts & Types
+export * from '@shared/contracts/kbx-types'
+
+// Adapter Components (PrimeVue wrapped)
+export { default as KbxButton } from './KbxButton.vue'
+export { default as KbxInput } from './KbxInput.vue'
+export { default as KbxDataGrid } from './KbxDataGrid.vue'
+export { default as KbxListPage } from './KbxListPage.vue'
+
+// Density tokens
+export const densityTokens = {
+  compact: {
+    inputHeight: 34,
+    gridRowHeight: 34,
+    touchTarget: 44,
+    fontSize: 12,
+  },
+  comfortable: {
+    inputHeight: 36,
+    gridRowHeight: 36,
+    touchTarget: 48,
+    fontSize: 14,
+  },
+  touch: {
+    inputHeight: 48,
+    gridRowHeight: 48,
+    touchTarget: 52,
+    fontSize: 16,
+  },
+}
+
+// Theme configuration
+export const defaultTheme = {
+  primary: '#3b82f6',
+  secondary: '#6b7280',
+  danger: '#ef4444',
+  success: '#10b981',
+  warning: '#f59e0b',
+  info: '#06b6d4',
+}