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/main.ts

@@ -5,15 +5,13 @@ import App from './App.vue'
 import { router } from './app/router'
 import { queryClient } from './app/queryClient'
 import { resolveUiProvider } from './shared/ui/provider'
-import { installKbx, registerScreens } from './app/installKbx'
-import { screens } from './registry/screens'
+import { installKbx } from './app/installKbx'
 import './design-system/base.css'
 
 const app = createApp(App)
 app.use(createPinia())
 app.use(router)
 app.use(VueQueryPlugin, { queryClient })
-registerScreens(screens)
 app.use(installKbx)
 ;(await resolveUiProvider(import.meta.env.VITE_UI_ADAPTER)).install(app)
 app.mount('#app')