[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

src/components/graph/TitleEditor.vue

@@ -13,13 +13,17 @@
 </template>
 
 <script setup lang="ts">
-import { LGraphGroup, LGraphNode, LiteGraph } from '@comfyorg/litegraph'
-import type { LiteGraphCanvasEvent } from '@comfyorg/litegraph'
 import { useEventListener } from '@vueuse/core'
 import { type CSSProperties, computed, ref, watch } from 'vue'
 
 import EditableText from '@/components/common/EditableText.vue'
 import { useAbsolutePosition } from '@/composables/element/useAbsolutePosition'
+import {
+  LGraphGroup,
+  LGraphNode,
+  LiteGraph
+} from '@/lib/litegraph/src/litegraph'
+import type { LiteGraphCanvasEvent } from '@/lib/litegraph/src/litegraph'
 import { app } from '@/scripts/app'
 import { useCanvasStore, useTitleEditorStore } from '@/stores/graphStore'
 import { useSettingStore } from '@/stores/settingStore'