Cursor adds Design Mode for canvas editing and context usage reports

Cursor canvases now support Design Mode for direct UI element selection and annotation. The update adds interactive context usage reports showing token distribution and full-screen shared canvases.

Cursor added Design Mode to canvases so developers and vibe builders can select and annotate UI elements directly. An interactive context usage report now shows token distribution details for all users. Shared canvases gained full-screen support for basic users reviewing work.