AlwaysOnShowCase

fix: widen container max-width to 1400px to reduce side whitespace on large screens

a11y: add aria-label to nav and all 8 section landmarks

feat: add keyboard navigation (ArrowUp/Down, Space, PageUp/Down) to scroll-snap engine

fix: move wheel accumulator past isCoolingDown guard to prevent phantom snaps

Add .gitignore and naruto-profile.html