feat: add employee management, backend health check, and UI improvements

web/src/main.js

@@ -5,9 +5,12 @@ import Aura from '@primevue/themes/aura'
 import 'primeicons/primeicons.css'
 import App from './App.vue'
 import router from './router/index.js'
+import { installSessionNavigation } from './composables/useSystemState.js'
 
 const app = createApp(App)
 
+installSessionNavigation(router)
+
 app.use(MotionPlugin)
 app.use(router)
 app.use(PrimeVue, {