ejbills/DockDoor ? reverse-engineered prompt

Build me a macOS app called DockDoor that makes switching between apps and windows feel much better. I want dock icon hovering to show live window previews so I can quickly see and pick the right window when an app has several open. It should also improve Alt Tab and Cmd Tab switching with a cleaner switcher, better previews, and a compact list style if needed. Please include a way to lock the Dock to one monitor in a multi display setup so it does not jump around. Add the extra quality of life features shown in the project, like calendar integration and enhanced previews, and make it feel native, fast, and lightweight. If you need to check current macOS or Swift docs while building, go ahead and look them up online.