Added

• One-shot screenshot capture to PNG (Cmd+Shift+S) — saves to ~/Pictures/zurm-screenshots/

• Screen recording via FFMPEG pipe to MP4 (Cmd+Shift+.) — saves to ~/Movies/zurm-recordings/

• Recording status bar indicator with blinking dot, elapsed time, and output file size

• Quit confirmation dialog on Cmd+Q

• Makefile with build, bundle, install, and clean targets

• macOS .app bundle packaging (Info.plist, icon, install to /Applications)

• New tab defaults to $HOME on first launch