feat: social links with inline SVG icons from CMS

SocialRecord gains icon field (SVG markup string). InlineSvg component
parses SVG string via html-react-parser. Footer renders icon on mobile
(sm:hidden label), label on sm+ (hidden icon). Email field refactored
from string to SocialRecord relation.

src/shared/ui/InlineSvg/index.ts

@@ -0,0 +1 @@
+export { InlineSvg } from './ui/InlineSvg';

src/shared/ui/InlineSvg/ui/InlineSvg.tsx

@@ -0,0 +1,25 @@
+import parse from 'html-react-parser';
+import { cn } from '$shared/lib';
+
+type Props = {
+  /**
+   * SVG markup string to inline as React elements
+   */
+  svg: string;
+  /**
+   * Additional CSS classes on the wrapper span
+   */
+  className?: string;
+};
+
+/**
+ * Parses an SVG markup string into React elements.
+ * Inherits color from parent via currentColor.
+ */
+export function InlineSvg({ svg, className }: Props) {
+  if (!svg) {
+    return null;
+  }
+
+  return <span className={cn('inline-flex items-center', className)}>{parse(svg)}</span>;
+}