refactor: deduplicate splitFilePath and getResourceURL

Extract shared file path and resource URL utilities to
src/utils/resourceUrl.ts, eliminating exact duplicates
between load3d and audio widget code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/extensions/core/load3d/Load3dUtils.ts

@@ -3,7 +3,7 @@ import { t } from '@/i18n'
 import { useToastStore } from '@/platform/updates/common/toastStore'
 import { api } from '@/scripts/api'
 
-import { getResourceURL, splitFilePath } from './load3dFileUtils'
+import { getResourceURL, splitFilePath } from '@/utils/resourceUrl'
 
 class Load3dUtils {
   static async generateThumbnailIfNeeded(

src/extensions/core/load3d/SceneManager.ts

@@ -1,7 +1,7 @@
 import * as THREE from 'three'
 import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
 
-import { getResourceURL, splitFilePath } from './load3dFileUtils'
+import { getResourceURL, splitFilePath } from '@/utils/resourceUrl'
 import {
   type BackgroundRenderModeType,
   type EventManagerInterface,

src/renderer/extensions/vueNodes/widgets/utils/audioUtils.ts

@@ -1,5 +1,4 @@
-import type { ResultItemType } from '@/schemas/apiSchema'
-import { app } from '@/scripts/app'
+export { getResourceURL, splitFilePath } from '@/utils/resourceUrl'
 
 /**
  * Format time in MM:SS format
@@ -11,29 +10,3 @@ export function formatTime(seconds: number): string {
   const secs = Math.floor(seconds % 60)
   return `${mins}:${secs.toString().padStart(2, '0')}`
 }
-
-export function getResourceURL(
-  subfolder: string,
-  filename: string,
-  type: ResultItemType = 'input'
-): string {
-  const params = [
-    'filename=' + encodeURIComponent(filename),
-    'type=' + type,
-    'subfolder=' + subfolder,
-    app.getRandParam().substring(1)
-  ].join('&')
-
-  return `/view?${params}`
-}
-
-export function splitFilePath(path: string): [string, string] {
-  const folder_separator = path.lastIndexOf('/')
-  if (folder_separator === -1) {
-    return ['', path]
-  }
-  return [
-    path.substring(0, folder_separator),
-    path.substring(folder_separator + 1)
-  ]
-}