HOW TO USE:
1. Add the "Export JSON to XLSX" action in a workflow.

2. Input the following fields:
  - "jsonData": A plain-text JSON array (must be an array of objects).
  - "filename": (Optional) Default is "export.xlsx"
  - "sheetName": (Optional) Default is "Sheet1"

EXAMPLE jsonData:
[
 { "name": "Alice", "age": 28, "email": "[email protected]" },
 { "name": "Bob", "age": 34, "email": "[email protected]" }
]

NOTES:
- Always use JSON-safe format (e.g. `:format as JSON-safe`) if using dynamic expressions.
- JSON must be a valid array of key-value objects.
- The file is downloaded directly in the browser.

TROUBLESHOOTING:
- If you see "Invalid JSON input" or no download occurs, double-check your jsonData format.