[refactor] Organize all browser test assets into logical folders (#5058)

* move subgraph test assets into subfolder

* [refactor] Organize browser test assets into logical folders

Reorganized test assets for better maintainability:
- groupnodes/: GroupNode feature tests
- groups/: Visual grouping tests
- missing/: Missing nodes/models tests
- links/: Link-related tests
- inputs/: Input widget tests
- widgets/: Widget-specific tests
- nodes/: Node-related tests
- workflowInMedia/: Workflow media files

Updated all loadWorkflow references to use new folder structure.
Fixed programmatic filename references to prevent test failures.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

* [fix] Update mobile test to use new asset path

* [fix] Update remaining loadWorkflow calls to use new folder structure

* [fix] Fix remaining programmatic filename references

* [fix] Run prettier formatting

* [fix] Fix setupWorkflowsDirectory references to use correct folder paths

* [refactor] Rename subgraph folder to subgraphs for consistency

* [fix] Fix breadcrumb name in subgraph DOM widget test

* Update test expectations [skip ci]

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: github-actions <github-actions@github.com>

browser_tests/tests/graph.spec.ts

@@ -6,7 +6,7 @@ test.describe('Graph', () => {
   // Should be able to fix link input slot index after swap the input order
   // Ref: https://github.com/Comfy-Org/ComfyUI_frontend/issues/3348
   test('Fix link input slots', async ({ comfyPage }) => {
-    await comfyPage.loadWorkflow('input_order_swap')
+    await comfyPage.loadWorkflow('inputs/input_order_swap')
     expect(
       await comfyPage.page.evaluate(() => {
         return window['app'].graph.links.get(1)?.target_slot
@@ -15,7 +15,7 @@ test.describe('Graph', () => {
   })
 
   test('Validate workflow links', async ({ comfyPage }) => {
-    await comfyPage.loadWorkflow('bad_link')
+    await comfyPage.loadWorkflow('links/bad_link')
     await expect(comfyPage.getVisibleToastCount()).resolves.toBe(2)
   })
 })