[feat] Improve UX for disabled node packs in Manager dialog (#5478)

* [feat] Improve UX for disabled node packs in Manager dialog

- Hide "Update All" button when only disabled packs have updates
- Add tooltip on "Update All" hover to indicate disabled nodes won't be updated
- Disable version selector and show tooltip for disabled node packs
- Filter updates to only show enabled packs in the update queue
- Add visual indicators (opacity, cursor) for disabled pack cards
- Add comprehensive test coverage for new functionality

This improves the user experience by clearly indicating which packs
can be updated and preventing confusion about disabled packs.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* chore: missing nodes description added

* test: test code modified

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/components/dialog/content/LoadWorkflowWarning.vue

@@ -2,8 +2,8 @@
   <NoResultsPlaceholder
     class="pb-0"
     icon="pi pi-exclamation-circle"
-    title="Some Nodes Are Missing"
-    message="When loading the graph, the following node types were not found"
+    :title="$t('loadWorkflowWarning.missingNodesTitle')"
+    :message="$t('loadWorkflowWarning.missingNodesDescription')"
   />
   <MissingCoreNodesMessage :missing-core-nodes="missingCoreNodes" />
   <ListBox