Enable drag-and-drop opening of .3mf files on the Home tab

[ibrrus]

Problem
In Bambu Studio, .3mf files can be opened via drag and drop only on the “Prepare” and “Preview” tabs.
If a .3mf file is dragged onto the application window while the “Home” tab is active, nothing happens.
This is confusing and breaks expected drag-and-drop behavior.

In my workflow, I usually start in the Home tab to check recently opened projects. If the needed file is not listed there, I locate the required .3mf file in the file manager and drag it into Bambu Studio. Very often, I forget that drag-and-drop works only on specific tabs, so the file simply does not open.

Describe the solution you'd like
Enable drag-and-drop opening of .3mf files on the “Home” tab, so that dropping a file anywhere in the main application window consistently opens the project, regardless of the currently active tab.

Describe alternatives you've considered
The only workaround is to manually switch to the Prepare or Preview tab before dragging the file, which is easy to forget and interrupts the workflow.

Additional context
For users, drag-and-drop is generally expected to work consistently across the entire application window. Supporting this behavior on the Home tab would make file opening more intuitive and reduce unnecessary tab switching.