{/* Favicon declarations. Declaring the icon variants explicitly stops browsers from probing for missing ones (/favicon.ico, /apple-touch-icon.png, /apple-touch-icon-precomposed.png), each of which would otherwise produce a 404 + retry and contribute to the "icon flood" seen on first load (Bug 9). The SVG is the single source of truth; the apple-touch-icon link points at the same SVG so iOS Safari does not probe for a PNG. */}