feat:content protection

[rishaan05]

Summary

Adds a contentProtection API to BrowserWindow, allowing apps to prevent their windows from being captured via screenshots, screen recording, or screen sharing tools. Equivalent to Electron's win.setContentProtection().

New API

const win = new BrowserWindow({ contentProtection: true });

win.setContentProtection(true);
win.setContentProtection(false);

Platform Support

Platform	Implementation
macOS	[NSWindow setSharingType:NSWindowSharingNone]
Windows	SetWindowDisplayAffinity(hwnd, WDA_EXCLUDEFROMCAPTURE) (Windows 10 v2004+)

Testing

1. Run bun dev from the package folder
2. Open Run Interactive Tests → "Window content protection playground"
3. Take a screenshot (Cmd+Shift+4 → Space on macOS) with protection ON. Window should not appear in image.
4. Click Toggle Protection to turn it OFF. Window should now be visible in screenshots