euxora/penciless — reverse-engineered prompt

Build me a lightweight Windows screen annotation app called Penciless. I want it to sit transparently over the whole screen, always on top, so I can draw over presentations, videos, code, or anything else without taking a screenshot.

It should have a simple floating toolbar with pen, soft brush, eraser, shapes, color picker, undo, redo, clear all, and a way to open settings. The pen should feel smooth, the brush should be wider and soft, and the eraser should show a circular preview. Shapes should include rectangle, circle, diamond, triangle, hexagon, and star. Add a proper color picker with recent colors and hex input.

Please make it with Tauri v2 and TypeScript for Windows. Include settings for dark and light theme, English and Spanish, custom cursor, and configurable shortcuts. Alt plus Shift should toggle click through mode so I can interact with windows underneath. Add sensible defaults and make it buildable as an installer.