Bug: e.preventDefault is not a function when clicking upload inside form (v4.18.13)

Bug Report: e.preventDefault is not a function when clicking upload button inside VbenForm

Version: vxe-table 4.18.13
Vue: 3.5.34
Browser: Chrome
Link: https://github.com/x-extends/vxe-table/issues

Description

When clicking an upload button (or any non-input element that triggers form value change) inside a vxe-table form, the following error occurs:

TypeError: e.preventDefault is not a function
    at prevent (vendor-vxe.js:3:67059)
    at vendor-vxe.js:3:67506
    ...

The prevent function in Ql (event helper object) blindly calls e.preventDefault() without checking whether e is a valid Event object:

Ql = {
  stop: e => e.stopPropagation(),
  prevent: e => e.preventDefault(),  // ← crash here when e is not Event
  self: e => e.target === e.currentTarget,
}

Reproduction Steps

1. Use vxe-table with useVbenForm (Vben admin form integration)
2. Add a form field with an upload component (e.g. CustomPdfDisplay or FileUpload)
3. Click the upload button to trigger file selection
4. The form value change triggers vxe-table's internal event system
5. prevent() receives a non-Event object → error

Root Cause

The prevent helper in Ql at table/src/table.js line 67059 (compiled) does not guard against non-Event objects:

// Current (unsafe):
prevent: e => e.preventDefault()

// Expected (safe):
prevent: e => e?.preventDefault?.()

Or more defensively:

prevent: e => {
  if (e && typeof e.preventDefault === 'function') {
    e.preventDefault();
  }
}

Related Code

Located in lib/table/src/table.js around the Ql helper object:

var Ql = {
  stop: e => e.stopPropagation(),
  prevent: e => e.preventDefault(),  // unsafe
  self: e => e.target === e.currentTarget,
};

This Ql object is used in various event handling contexts (keydownEvent, handleGlobalKeydownEvent, pointerDownOutside, etc.). Some of these callers may pass non-Event objects, especially when the table is embedded in a form system that programmatically triggers value changes.

Suggested Fix

Add a type guard to prevent:

prevent: e => {
  if (e && typeof e.preventDefault === 'function') {
    e.preventDefault();
  }
}

This is a safe, backward-compatible change that won't break any existing functionality.