Address review accuracy: humanClick used DOM scrollIntoViewIfNeeded and fell
back to Playwright locator.click() when an element had no box - neither is real
input. Now it brings elements into view with a real wheel scroll and throws if
there is no on-screen box (no synthetic click). Header comment and README
corrected: xdotool injects synthetic X input (not a physical HID device), and
all actions are real input while the CDP/DOM API is used only to read state.
Make every action real keyboard/mouse via xdotool, not just the visible
browsing: address-bar navigation (Ctrl+L + char-by-char typing), the YouTube
settings gear -> 화질 -> 1080p menu (real clicks, verified hd1080), the autoplay
toggle, the play button, and fullscreen via the real 'f' key (F11 isn't honored
by this WM; 'f' yields true 1080p fullscreen without pausing). CDP/DOM API is
now used only to read state for verification.