Fix mobile menu blur and improve admin sidebar text contrast

src/components/mobile-nav.tsx

@@ -58,9 +58,7 @@ export function MobileNav({
 					className="fixed inset-0 z-30 md:hidden"
 					onClick={() => setOpen(false)}
 					style={{
-						backgroundColor: "rgba(0,0,0,0.45)",
-						backdropFilter: "blur(6px)",
-						WebkitBackdropFilter: "blur(6px)",
+						backgroundColor: "rgba(0,0,0,0.6)",
 					}}
 				/>
 			)}