docs: Add instructions for regenerating LoadAudio widget test expectations

Document the process for regenerating the Playwright test snapshot for
the 'Can load audio' test. This test requires the ComfyUI backend to
be running with --multi-user flag to properly capture the UI state.

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

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

REGENERATE_AUDIO_TEST.md

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+# Regenerating Load Audio Widget Test Expectations
+
+## Overview
+This document describes how to regenerate the Playwright test expectations for the "Can load audio" test in `browser_tests/tests/widget.spec.ts`.
+
+## Prerequisites
+1. ComfyUI backend running with `--multi-user` flag:
+   ```bash
+   python main.py --multi-user
+   ```
+2. ComfyUI_devtools installed in `custom_nodes` directory
+3. Node.js dependencies installed (`pnpm install`)
+
+## Steps to Regenerate
+
+1. Ensure the backend is running on port 8188
+2. Run the specific test with snapshot update flag:
+   ```bash
+   pnpm test:browser --update-snapshots tests/widget.spec.ts -g "Can load audio"
+   ```
+
+## Current Test Status
+- Test location: `browser_tests/tests/widget.spec.ts:313`
+- Snapshot location: `browser_tests/tests/widget.spec.ts-snapshots/load-audio-widget-chromium-linux.png`
+- Workflow file: `browser_tests/assets/widgets/load_audio_widget.json`
+
+## What the Test Does
+The test loads a workflow containing a LoadAudio node and verifies that the audio widget renders correctly with:
+- Audio player controls
+- File upload button
+- Proper node title and connections
+
+## Note
+The test snapshot needs to be regenerated when UI changes affect the LoadAudio node rendering.