finally added calculator and file manager today.

calculator works properly now ,basic operations and grid layout fixed. file manager shows folders and files, clicking them triggers notifications.
also fixed some other stuff ,taskbar apps scroll when there are too many, added resize handle on windows so you can drag them bigger or smaller, dark mode works properly now windows, taskbar, menus, and text all switch.
terminal prompt is at the top now, drawing canvas pointer is fixed, right-click on desktop gives wallpaper options and refresh.

getting closer to being done.