## Summary
Add frontend-only display name mappings for nodes shown in the
Essentials tab, plus parse the new `essentials_category` field from the
backend.
## Changes
- **What**: Created `src/constants/essentialsDisplayNames.ts` with a
static mapping of node names to user-friendly display names (e.g.
`CLIPTextEncode` → "Text", `ImageScale` → "Resize Image"). Regular nodes
use exact name matching; blueprint nodes use prefix matching since their
filenames include model-specific suffixes. Integrated into
`NodeLibrarySidebarTab.vue`'s `renderedRoot` computed for leaf node
labels with fallback to `display_name`. Added `essentials_category`
(z.string().optional()) to the node def schema and `ComfyNodeDefImpl` to
parse the field already sent by the backend (PR #12357).
## Review Focus
Display names are resolved only in the Essentials tab tree view
(`NodeLibrarySidebarTab.vue`), not globally, to avoid side effects on
search, bookmarks, or other views. Blueprint prefix matching is ordered
longest-first so more specific prefixes (e.g. `image_inpainting_`) match
before shorter ones (e.g. `image_edit`).
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9072-feat-add-display-name-mappings-for-Essentials-tab-nodes-30f6d73d3650817c9acdc9b0315ed0be)
by [Unito](https://www.unito.io)
