First tab does not drag-drop when there is not enough space above the dockview area

[nilsm]

Describe the bug When there is not enough space above the dockview container div, the first tab does not drag/drop.

To Reproduce

Steps to reproduce the behavior:

1. Go to https://dockview.dev/templates/dockview/basic/typescript/index.html
2. Go to 'Inspect' in the developer tools
3. Set 'display: none' as the style for the header
4. Try to drag Panel 1 - it won't drag anymore
5. Drag Panel 2 into the first position - it won't drag anymore but Panel 1 can now be dragged

The same behaviour happens when there is no other div above the dockview container div - eg. for full-screen layouts where dockview is the only element on the page.

Desktop (please complete the following information):

• Browser: seems to be universal but mostly tested in Chrome v134.0.6998
• (also seen on Windows Chrome, Windows Edge, OSX Safari)

[nilsm]

More info:

1. It seems to be possible to drag the first panel by placing the mouse a little below the title
2. Even with the header visible the first panel is not draggable if the header height is < 10px approximately

[mathuo]

Which element are you setting display: none on?

[yanyinqing]

Which element are you setting on?display: none

I have the same problem, which happens when the panel fills the whole interface.

[yanyinqing]

Which element are you setting on?display: none

I have the same problem, which happens when the panel fills the whole interface.

The first one can't be dragged. You can reproduce this problem by using "display:none" for the first div-header in the link given by the post owner.

[mathuo]

Fixed in 4.2.5