FE-719 feat(load3d): add FBX export support (#12323)

## Summary
implement fbx export, using our own lib fbx-exporter-three

## Screenshots (if applicable)


https://github.com/user-attachments/assets/80012338-d065-4a00-a9a0-0a2e73d67db4

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-12323-FE-719-feat-load3d-add-FBX-export-support-3656d73d365081ef901ffe880ae9568a)
by [Unito](https://www.unito.io)

Author: jtydhr88

package.json

@@ -60,6 +60,7 @@
     "@atlaskit/pragmatic-drag-and-drop": "^1.3.1",
     "@comfyorg/comfyui-electron-types": "catalog:",
     "@comfyorg/design-system": "workspace:*",
+    "@comfyorg/fbx-exporter-three": "^1.0.1",
     "@comfyorg/object-info-parser": "workspace:*",
     "@comfyorg/registry-types": "workspace:*",
     "@comfyorg/shared-frontend-utils": "workspace:*",

pnpm-lock.yaml

@@ -48,7 +48,8 @@ const showExportFormats = ref(false)
 const exportFormats = [
   { label: 'GLB', value: 'glb' },
   { label: 'OBJ', value: 'obj' },
-  { label: 'STL', value: 'stl' }
+  { label: 'STL', value: 'stl' },
+  { label: 'FBX', value: 'fbx' }
 ]
 
 function toggleExportFormats() {

src/components/load3d/controls/ExportControls.vue

@@ -81,12 +81,12 @@ function renderComponent(onExportModel?: (format: string) => void) {
 }
 
 describe('ViewerExportControls', () => {
-  it('renders all three export format options', () => {
+  it('renders all four export format options', () => {
     renderComponent()
     const select = screen.getByRole('combobox') as HTMLSelectElement
     const optionValues = Array.from(select.options).map((o) => o.value)
 
-    expect(optionValues).toEqual(['glb', 'obj', 'stl'])
+    expect(optionValues).toEqual(['glb', 'obj', 'stl', 'fbx'])
   })
 
   it('defaults the export format to obj', () => {

src/components/load3d/controls/viewer/ViewerExportControls.test.ts

@@ -42,7 +42,8 @@ const emit = defineEmits<{
 const exportFormats = [
   { label: 'GLB', value: 'glb' },
   { label: 'OBJ', value: 'obj' },
-  { label: 'STL', value: 'stl' }
+  { label: 'STL', value: 'stl' },
+  { label: 'FBX', value: 'fbx' }
 ]
 
 const exportFormat = ref('obj')