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Bug Report: formDataToObject() creates a massive sparse array when form field names mix numeric and string…

Bug Report: formDataToObject() creates a massive sparse array when form field names mix numeric and string…: a task in LegoFlow-SWE (Harbor dataset). When a form contains fields that use bracket notation with a mix of numeric and non‑numeric keys at the same level, the formDataToObject() function…

The task

When a form contains fields that use bracket notation with a mix of numeric and non‑numeric keys at the same level, the `formDataToObject()` function produces an incorrect data structure. Instead of a plain object, it creates a huge sparse array.

Part of Lego-X/LegoFlow-SWE.