fix: skip auto-formatting JSON inputs

[Moeblack]

Summary

• Skip auto-formatting for JSON-like textarea content to avoid corrupting structural commas in JSON.
• Add a unit test covering JSON input.

Why

Autocomplete-Plus auto-formatting is designed for comma-separated prompt tags. When users paste JSON into a multiline textarea (e.g. used as structured prompt schema), formatting on blur can remove JSON commas and break the JSON.

Test plan

• npm test

[newtextdoc1111]

Thank you for your contribution!

Upon reviewing the code, I found that scheduling syntax used by comfyui-prompt-control extension is being incorrectly identified as JSON content. I have added two suggestions as inline comments on the source code. I would appreciate it if you could verify whether these changes work correctly in your environment.

Suggestions

1. Use JSON.parse for JSON content detection
2. Add unit tests for prompts containing comfyui-prompt-control scheduling syntax

P.S. About the GitHub Action error, I'll fix it after merging this PR.

[Moeblack]

Thank you for the review and the suggestions.

I have applied the changes to use \JSON.parse\ for JSON detection and added the unit tests for the \comfyui-prompt-control\ scheduling syntax.

During testing, the scheduling syntax tests initially failed because the original \wordCommaPattern\ (/\w+\s*,/g) did not match the closing bracket ]. I updated the regex to /[^\s,]+\s*,/g\ to ensure these tokens are correctly captured. All tests are now passing.

Please let me know if anything else is needed.