Rename the portfolio mascot from Bigeye to Davebot and give him the
canonical inverse inks: light mode uses a #262626 body with #d4d4d4
eyes, dark mode mirrors that exactly.
Eyes follow the pointer by translating the two existing eye paths with
one persistent SVG transform each, batched into a single animation
frame. Playback, blinking and body drift stay owned by avatar-web, so
gaze layers on top without resetting the timeline or regenerating paths.
Also fix Prettier violations in earlier portfolio-gallery files.
