web: correct toolbar item indentation when moving between groups + add tests for customize-toolbar.tsx

[ArjunCodess]

fixes #4350

Problem

When dragging toolbar items from a subgroup to the main toolbar (or between different groups), the indentation was not updating correctly. Items would maintain their previous indentation level instead of adjusting to match their new position.

Root Cause

The moveItem function in customize-toolbar.tsx had flawed depth calculation logic:

• It would first set the depth to match the target item's depth
• Then only if moving to a group, it would add 1 to the depth
• This caused incorrect indentation when moving between different levels

Solution

Improved the depth calculation logic to properly handle all movement scenarios:

// Calculate the correct depth based on where the item is being moved
if (movingToGroup) {
  // If moving to a group/subgroup, set depth to group's depth + 1
  fromItem.depth = toItem.depth + 1;
} else {
  // If moving to another item, set depth to match the target item's depth
  fromItem.depth = toItem.depth;
}

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[ArjunCodess]

@ammarahm-ed hey! :)

if there is anything left to implement / anything to be edited, please let me know!

[thecodrr]

Thanks!

[ArjunCodess]

@thecodrr done!

[ArjunCodess]

@thecodrr just a follow-up.

[ArjunCodess]

@thecodrr just a follow-up.