Use a more elegant and robust way to fix the previous two bugs.

Bug fix: When sorting (excluding union sorting), if there's a stackable item in the backpack that isn't full and also exists in the inventory, the item in the inventory was incorrectly stacked into the backpack.

Bug fix: some items stayed in their original positions after sorting.

The “Sort Trigger Key” setting has been changed to a client-side option, allowing all players to customize their preferred key for triggering the sort action.

Added a simple key configuration scheme for sorting:
1.The first server setting “Sort Trigger Key” allows you to choose either CTRL or ALT — this determines which key triggers the basic “Sort” action.
2.The second server setting “Union Sort Trigger Mode” allows you to choose between Single Key Mode and Double Key Mode.
In Double Key Mode, pressing both CTRL and ALT together triggers “Union Sort”.
In Single Key Mode, the key you didn’t choose as the “Sort” trigger will be automatically used as the “Union Sort” trigger.
3.The third server setting “Allow Sorting Others” determines whether players are allowed to perform (Union) Sort on other players.

1、When hovering the mouse over yourself, if both CTRL and ALT are held down, it will display "Combined Sort",which
means the inventory and backpack will be sorted together.
2、Food your character can eat will be grouped together.

Player Inventory Sorting Added(Hover the cursor over yourself while holding CTRL then right click).