logos: set w-full on the SVGs so they actually fill their flex parents

Without explicit dimensions the browser fell back to the SVG default
(300×150 CSS px), overflowing the 120×120 header link and hiding
behind the backdrop-blur.

src/components/Logo.tsx

@@ -5,6 +5,7 @@ export default function Logo() {
 			role="img"
 			xmlns="http://www.w3.org/2000/svg"
 			viewBox="0 0 643.6 382.49"
+			className="w-full h-full"
 		>
 			<title>unom</title>
 			<path

src/components/LogoQuadBG.tsx

@@ -5,6 +5,7 @@ export default function LogoQuadBG() {
 			role="img"
 			xmlns="http://www.w3.org/2000/svg"
 			viewBox="0 0 1000 1000"
+			className="w-full h-auto"
 		>
 			<title>unom</title>
 			<rect