Fix essentials nodes not being marked core (#9287)

In adding an essentials cateogory for nodes, #8987 introduced a
regression where core nodes which are also essential are marked as being
from a `nodes` custom node instead of being marked core. Since the
essentials designation should pre-empt core and custom nodes can choose
to mark themself as essential, the getter for `isCoreNode` is updated to
instead repeat the existing check for if a node is core.

| Before | After |
| ------ | ----- |
| <img width="360" alt="before"
src="https://github.com/user-attachments/assets/f1b8bf80-d072-409a-a0f9-4837e1d11767"
/> | <img width="360" alt="after"
src="https://github.com/user-attachments/assets/14ff525b-9833-4e73-888f-791aff6cf531"/>|

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9287-Fix-essentials-nodes-not-being-marked-core-3146d73d365081fca2a0f8bdc2baf01a)
by [Unito](https://www.unito.io)

src/stores/nodeDefStore.ts

@@ -24,7 +24,7 @@ import { useSettingStore } from '@/platform/settings/settingStore'
 import { NodeSearchService } from '@/services/nodeSearchService'
 import { useSubgraphStore } from '@/stores/subgraphStore'
 import {
-  NodeSourceType,
+  CORE_NODE_MODULES,
   getEssentialsCategory,
   getNodeSource
 } from '@/types/nodeSource'
@@ -92,6 +92,7 @@ export class ComfyNodeDefImpl
   readonly essentials_category?: string
   /** Whether the blueprint is a global/installed blueprint (not user-created). */
   readonly isGlobal?: boolean
+  readonly isCoreNode: boolean
 
   // V2 fields
   readonly inputs: Record<string, InputSpecV2>
@@ -169,6 +170,9 @@ export class ComfyNodeDefImpl
       obj.essentials_category
     )
     this.isGlobal = obj.isGlobal
+    this.isCoreNode = CORE_NODE_MODULES.includes(
+      this.python_module.split('.')[0]
+    )
 
     // Initialize V2 fields
     const defV2 = transformNodeDefV1ToV2(obj)
@@ -198,10 +202,6 @@ export class ComfyNodeDefImpl
     return [scores[0], -nodeFrequency, ...scores.slice(1)]
   }
 
-  get isCoreNode(): boolean {
-    return this.nodeSource.type === NodeSourceType.Core
-  }
-
   get nodeLifeCycleBadgeText(): string {
     if (this.deprecated) return '[DEPR]'
     if (this.experimental) return '[BETA]'

src/types/nodeSource.ts

@@ -10,6 +10,7 @@ export enum NodeSourceType {
   Essentials = 'essentials',
   Unknown = 'unknown'
 }
+export const CORE_NODE_MODULES = ['nodes', 'comfy_extras', 'comfy_api_nodes']
 
 export type NodeSource = {
   type: NodeSourceType
@@ -68,9 +69,7 @@ export const getNodeSource = (
       displayText: displayName,
       badgeText: displayName
     }
-  } else if (
-    ['nodes', 'comfy_extras', 'comfy_api_nodes'].includes(modules[0])
-  ) {
+  } else if (CORE_NODE_MODULES.includes(modules[0])) {
     return {
       type: NodeSourceType.Core,
       className: 'comfy-core',