The Dropdown opened where you right-click: a zero-size trigger placed at the pointer, so the items are the Dropdown's own (MenuItem, submenus, search, labels, separators) with its fluid hover, keys and motion. A filter picks which elements open it, text fields keep the browser's menu, Shift + F10 or the Menu key opens it from the keyboard, and focus returns where it was on close.
pnpm dlx shadcn@latest add "https://www.fluidfunctionalism.com/r/context-menu.json"