[QA] ✅ VERIFICATION PASSED All acceptance criteria verified and working correctly: - Billing nav item appears in sidebar secondary navigation (bottom section) - Perks icon (dollar sign) displays correctly - Navigation to /billing route works - Active state highlights correctly when on /billing page - Inactive state works correctly when on other pages - Matches other nav items' style Backend tests: 430 passed Browser testing: All manual tests passed with chrome-devtools MCP Full report: /tmp/qa-PPLX-42.md Implementation is production-ready.

## Fix Applied **Problem**: Billing navigation was missing from the sidebar. **Changes Made**: - Added Usage & Billing nav item to secondaryNavItems array in src/src/App.tsx:111-117 - Used perks icon (dollar sign in circle - closest to credit-card icon) - Configured active state based on location.pathname === /billing - Added tooltip View usage and billing **Files Modified**: - src/src/App.tsx - Added billing nav item configuration **Testing**: - Verified nav item appears in sidebar secondary nav (bottom section) - Verified clicking navigates to /billing route - Verified active state highlights when on /billing page - Visual confirmation via browser testing **Merged to main**: af0a4e1