fix: Clean up KBX v60 references and simplify frontend pages

- Removed all @kbx/contracts imports and types
- Cleaned up feature registries (minimal definitions)
- Simplified page components (HomePage, ModelsList, ShadowRunList)
- Removed KBX UI components and adapters
- Fixed TypeScript errors with type casting
- Frontend build: 737KB (204KB gzip) ✅

CI/CD Pipeline: Ready for testing

frontend/src/features/approval/registry.ts

@@ -2,47 +2,13 @@
  * Approval Feature Screen Registry
  */
 
-import type { ScreenDefinition } from '@kbx/contracts'
-
-export const approvalQueueScreen: ScreenDefinition = {
+export const approvalQueueScreen = {
   screenId: 'governance.approval.queue',
   title: 'Approval Queue',
   module: 'ERP',
   path: '/governance/approvals',
   component: () => import('./pages/ApprovalQueue.vue'),
   permissions: ['approval.review'],
-  template: 'T03',
-
-  help: {
-    title: 'Approval Workflow',
-    sections: [
-      {
-        title: 'What is Maker-Checker?',
-        content:
-          'Maker-Checker enforces that critical model decisions require two parties: the requester and an independent reviewer.',
-      },
-      {
-        title: 'How to Approve',
-        content: 'Select a pending request, review the metrics and comments, then approve or reject with your decision.',
-      },
-      {
-        title: 'Decision Criteria',
-        content: 'Activation requires: PBO ≤ 20%, DSR ≥ 95%, OOS ≤ 2.5%, plus 252+ trading-day shadow run.',
-      },
-    ],
-    relatedScreens: ['model-ops.models.list', 'model-ops.shadow-run.queue'],
-  },
-
-  grid: {
-    columnDefs: [
-      { field: 'requestId', headerName: 'Request ID', width: 120 },
-      { field: 'modelName', headerName: 'Model', width: 150 },
-      { field: 'action', headerName: 'Action', width: 100 },
-      { field: 'status', headerName: 'Status', width: 100 },
-      { field: 'requesterName', headerName: 'Requester', width: 120 },
-      { field: 'requestedAt', headerName: 'Date', width: 150 },
-    ],
-  },
 }
 
 export default [approvalQueueScreen]