fix cross-process scenario switching and stale flights on scenario change

ui/app/src/pages/OpsNotifications.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, onMounted, watch, inject } from 'vue'
+import { ref, onMounted, watch, inject, type Ref } from 'vue'
 import { Panel, SplitPane, LogRenderer } from 'soleprint-ui'
 import NotificationCard from '../components/NotificationCard.vue'
 import HandoverBrief from '../components/HandoverBrief.vue'
@@ -12,7 +12,7 @@ const fceStatus = ref<'idle' | 'processing' | 'live' | 'error'>('idle')
 const handoverStatus = ref<'idle' | 'processing' | 'live' | 'error'>('idle')
 const notification = ref<any>(null)
 const handoverBrief = ref<any>(null)
-const scenarioVersion = inject<any>('scenarioVersion')
+const scenarioVersion = inject<Ref<number>>('scenarioVersion', ref(0))
 
 const showOps = inject<any>('showOps')
 const showInternals = inject<any>('showInternals')
@@ -21,7 +21,7 @@ const { agentStatus, entries, graphNodes, currentRun, connect } = useAgentEvents
 // Connect WebSocket immediately so we don't miss events
 onMounted(connect)
 
-watch(scenarioVersion, () => {
+watch(() => scenarioVersion.value, () => {
   loadFlights()
   notification.value = null
   handoverBrief.value = null