VUE 3 REAL-TIME DASHBOARD ARCHITECTURE:

COMPOSITION API SETUP
   // Dashboard composable with lifecycle management
   export function useLiveMetrics() {
     const metrics = ref({ users: 0, revenue: 0, errors: 0 })
     const loading = ref(false)
     const wsConnection = ref(null)
     
     onMounted(() => {
       wsConnection.value = new WebSocket('wss://api.example.com/metrics')
       wsConnection.value.onmessage = e => {
         metrics.value = JSON.parse(e.data)
       }
     })
     
     onUnmounted(() => wsConnection.value.close())
     return { metrics, loading }
   }

COMPONENT INTEGRATION
   - Use shallow ref for large metric objects to prevent deep reactivity overhead
   - Batch updates with debounced computed properties
   - Split into MetricCard subcomponents to isolate re-renders
   - Use v-memo on expensive list renders

PINIA STORE PATTERN
   defineStore('dashboardMetrics', () => {
     const state = ref({ ... })
     const updateMetric = action (key, value) => state.value.key = value
     return { state, updateMetric }
   })

PERFORMANCE TUNING
   • Lazy-load charts with defineAsyncComponent
   • Use requestAnimationFrame for smooth animations
   • Unsubscribe from WebSocket on component destroy