[Manager] Add update all button functionality

- Add PackUpdateButton component for bulk updates
- Add useUpdateAvailableNodes composable to track available updates
- Integrate update all button in RegistrySearchBar
- Add localization strings for update functionality
- Add comprehensive tests for update functionality
- Add loading state to PackActionButton

src/composables/nodePack/useUpdateAvailableNodes.ts

@@ -0,0 +1,65 @@
+import { computed, onMounted } from 'vue'
+
+import { useInstalledPacks } from '@/composables/nodePack/useInstalledPacks'
+import { useComfyManagerStore } from '@/stores/comfyManagerStore'
+import type { components } from '@/types/comfyRegistryTypes'
+import { compareVersions, isSemVer } from '@/utils/formatUtil'
+
+/**
+ * Composable to find NodePacks that have updates available
+ * Uses the same filtering approach as ManagerDialogContent.vue
+ * Automatically fetches installed pack data when initialized
+ */
+export const useUpdateAvailableNodes = () => {
+  const comfyManagerStore = useComfyManagerStore()
+  const { installedPacks, isLoading, error, startFetchInstalled } =
+    useInstalledPacks()
+
+  // Check if a pack has updates available (same logic as usePackUpdateStatus)
+  const isOutdatedPack = (pack: components['schemas']['Node']) => {
+    const isInstalled = comfyManagerStore.isPackInstalled(pack?.id)
+    if (!isInstalled) return false
+
+    const installedVersion = comfyManagerStore.getInstalledPackVersion(
+      pack.id ?? ''
+    )
+    const latestVersion = pack.latest_version?.version
+
+    const isNightlyPack = !!installedVersion && !isSemVer(installedVersion)
+
+    if (isNightlyPack || !latestVersion) {
+      return false
+    }
+
+    return compareVersions(latestVersion, installedVersion) > 0
+  }
+
+  // Same filtering logic as ManagerDialogContent.vue
+  const filterOutdatedPacks = (packs: components['schemas']['Node'][]) =>
+    packs.filter(isOutdatedPack)
+
+  // Filter only outdated packs from installed packs
+  const updateAvailableNodePacks = computed(() => {
+    if (!installedPacks.value.length) return []
+    return filterOutdatedPacks(installedPacks.value)
+  })
+
+  // Check if there are any outdated packs
+  const hasUpdateAvailable = computed(() => {
+    return updateAvailableNodePacks.value.length > 0
+  })
+
+  // Automatically fetch installed pack data when composable is used
+  onMounted(async () => {
+    if (!installedPacks.value.length && !isLoading.value) {
+      await startFetchInstalled()
+    }
+  })
+
+  return {
+    updateAvailableNodePacks,
+    hasUpdateAvailable,
+    isLoading,
+    error
+  }
+}