[refactor] Migrate litegraph imports from npm package to local subtree

- Updated all imports from '@comfyorg/litegraph' to '@/lib/litegraph/src/'
- Replaced deep dist imports with direct source paths
- Updated CSS import in main.ts
- All imports now use the @ alias consistently

tests-ui/tests/utils/graphTraversalUtil.test.ts

@@ -1,6 +1,10 @@
-import type { LGraph, LGraphNode, Subgraph } from '@comfyorg/litegraph'
 import { describe, expect, it, vi } from 'vitest'
 
+import type {
+  LGraph,
+  LGraphNode,
+  Subgraph
+} from '@/lib/litegraph/src/litegraph'
 import {
   collectAllNodes,
   collectFromNodes,

tests-ui/tests/utils/litegraphUtil.test.ts

@@ -1,7 +1,7 @@
-import { ISerialisedGraph } from '@comfyorg/litegraph/dist/types/serialisation'
-import type { IWidget } from '@comfyorg/litegraph/dist/types/widgets'
 import { describe, expect, it } from 'vitest'
 
+import { ISerialisedGraph } from '@/lib/litegraph/src/types/serialisation'
+import type { IWidget } from '@/lib/litegraph/src/types/widgets'
 import type { InputSpec } from '@/schemas/nodeDef/nodeDefSchemaV2'
 import {
   compressWidgetInputSlots,

tests-ui/tests/utils/nodeFilterUtil.test.ts

@@ -1,6 +1,6 @@
-import { LGraphNode } from '@comfyorg/litegraph'
 import { describe, expect, it } from 'vitest'
 
+import { LGraphNode } from '@/lib/litegraph/src/litegraph'
 import { filterOutputNodes, isOutputNode } from '@/utils/nodeFilterUtil'
 
 describe('nodeFilterUtil', () => {

tests-ui/tests/utils/serachAndReplace.test.ts

@@ -1,7 +1,7 @@
-import { LGraph } from '@comfyorg/litegraph'
-import type { LGraphNode } from '@comfyorg/litegraph'
 import { describe, expect, it } from 'vitest'
 
+import { LGraph } from '@/lib/litegraph/src/litegraph'
+import type { LGraphNode } from '@/lib/litegraph/src/litegraph'
 import { applyTextReplacements } from '@/utils/searchAndReplace'
 
 describe('applyTextReplacements', () => {