fix(kind-1111): use muted style for external link rows

Match the muted-foreground + dotted underline style used by other
scope rows instead of accent color.

https://claude.ai/code/session_01Dxedi6VWdZG8nFpba211oR

src/components/nostr/kinds/Kind1111Renderer.tsx

@@ -91,7 +91,7 @@ function ScopeRow({
         href={href}
         target="_blank"
         rel="noopener noreferrer"
-        className={`${base} text-accent hover:underline hover:decoration-dotted`}
+        className={`${base} text-muted-foreground underline decoration-dotted hover:text-foreground transition-colors`}
       >
         {children}
       </a>