Fix: Potential TypeError in distance.element.js due to missing null/undefined check on line_model

[AkshatRaj00]

Description

In app/components/selection/distance.element.js, the position setter directly passes line_model to this.styleProps and this.render() without verifying if line_model exists.

If line_model is unexpectedly passed as null or undefined (which can happen during rapid mouse movements or when elements dynamically unmount in modern single-page applications), the application will crash with a TypeError during object destructuring in downstream setters/methods.

Code Location

In app/components/selection/distance.element.js:

set position ({ line_model, node_label_id }) {
  this.styleProps = line_model
  this.$shadow.innerHTML = this.render(line_model, node_label_id)
}
Suggested Fix
Add a guard clause at the beginning of the position setter to gracefully exit if line_model is falsy:

JavaScript
set position ({ line_model, node_label_id }) {
  if (!line_model) return
  
  this.styleProps = line_model
  this.$shadow.innerHTML = this.render(line_model, node_label_id)
}