fix(monitor): keep active discovery independent of cache refresh

AppImage/components/lxc-app-panel.tsx

@@ -529,13 +529,14 @@ export function LxcAppPanel({ vmid, ctIp, onChange, managed, initialData, oci, c
   }, [vmid, managed])
   useEffect(() => {
     const generation = targetGeneration.current
-    const request = ++nativeRequest.current
+    const request = nativeRequest.current
+    let cancelled = false
     if (managed) return
     fetchApi<NativeDiscovery>(`/api/vms/${vmid}/apps/native-discovery`).then(result => {
-      if (targetRef.current === vmid && targetGeneration.current === generation
+      if (!cancelled && targetRef.current === vmid && targetGeneration.current === generation
           && nativeRequest.current === request) setNativeDiscovery(result)
     }).catch(() => { /* cached metadata is optional; never initiate a scan */ })
-    return () => { nativeRequest.current += 1 }
+    return () => { cancelled = true }
   }, [vmid, managed, cacheRevision])
   const [adguardSetupAvailable, setAdguardSetupAvailable] = useState(false)
   const [error, setError] = useState<string | null>(null)

tests/lxc_updates/test_local_app_icons_ui.cjs

@@ -55,6 +55,12 @@ async function editor(ports = [8080]) {
 }
 async function main() {
   await cachedImageContract()
+  const scanning = fixture()
+  scanning.renderParent(); await scanning.settle(); scanning.holdScan()
+  const pendingScan = scanning.button('searchApplications').props.onClick(); scanning.render()
+  scanning.renderParent(101, 1); await scanning.settle()
+  scanning.resolveScan(); await pendingScan; scanning.render()
+  assert.equal(scanning.button('searchApplications').props.disabled, false, 'revision must not leave an active Native Find stuck busy')
   const existing = fixture({apps: [{id: 'existing', name: 'Saved app', ports: [{port: 8080, scheme: 'http'}], state: {}}]})
   existing.renderParent(); await existing.settle()
   const click = async key => {