3) Container
The Container interface is used to add containers for loading cargo and to view or edit container-related information.
The page is divided into two parts: function buttons on top, container list below.
1) The function buttons on top include: "Add container", "Add from database", "Open/Close filter", "Delete selected containers".
① Add container directly adds containers for the chosen loading-task type. For example, choosing container loading allows only containers; choosing pallet loading allows only pallets.

② Add from database imports containers from the container database. Commonly used containers can be saved in the database to avoid re-entering each time, improving subsequent loading-calculation efficiency.

③ Open/Close filter toggles the keyword filter.
④ Delete selected containers deletes selected containers in bulk. Check the boxes on the left of the list to select containers, then click Delete selected containers. Note: clicking the box at the top-left of the list selects all containers.

2) Below is the list of added containers. On the left of each row is a plus button: click to view and edit related parameters; see Container properties. On the right of each row are the container name, remarks, type; fee and quantity can be edited.
