fix: version mismatch warning appearing in Playwright tests despite DisableWarnings setting (#8036)

PR #7004 added a setting to disable version warnings in e2e tests, but
it wasn't working on release branches. The issue was a race condition
(hypothesis): the version check ran before settings finished loading
from the backend, so the DisableWarnings setting read its default value
(false) instead of the configured value (true).

Fixed by making the warningsDisabled check reactive so it updates when
settings load and adding `nextTick` (settings are loaded, but ref
updates flush in a microtask. The immediate `whenever` runs before that
flush, so computeds may see stale/default values -- `nextTick` waits for
reactive microtasks to flush, so computeds will be correct. It's fine).

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8036-fix-version-mismatch-warning-appearing-in-Playwright-tests-despite-DisableWarnings-setti-2e86d73d36508132b4d1fd73ade76e63)
by [Unito](https://www.unito.io)

src/platform/updates/common/useFrontendVersionMismatchWarning.ts

@@ -1,5 +1,5 @@
 import { whenever } from '@vueuse/core'
-import { computed, onMounted } from 'vue'
+import { computed, nextTick, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import { useToastStore } from './toastStore'
@@ -65,9 +65,12 @@ export function useFrontendVersionMismatchWarning(
     versionCompatibilityStore.dismissWarning()
   }
 
-  onMounted(() => {
+  onMounted(async () => {
     // Only set up the watcher if immediate is true
     if (immediate) {
+      // Wait for next tick to ensure reactive updates from settings load have propagated
+      await nextTick()
+
       whenever(
         () => versionCompatibilityStore.shouldShowWarning,
         () => {

src/platform/updates/common/versionCompatibilityStore.ts

@@ -88,11 +88,16 @@ export const useVersionCompatibilityStore = defineStore(
       return Date.now() < dismissedUntil
     })
 
+    const warningsDisabled = computed(() =>
+      settingStore.get('Comfy.VersionCompatibility.DisableWarnings')
+    )
+
     const shouldShowWarning = computed(() => {
-      const warningsDisabled = settingStore.get(
-        'Comfy.VersionCompatibility.DisableWarnings'
+      return (
+        hasVersionMismatch.value &&
+        !isDismissed.value &&
+        !warningsDisabled.value
       )
-      return hasVersionMismatch.value && !isDismissed.value && !warningsDisabled
     })
 
     const warningMessage = computed(() => {