fix(react): match Lit Icon component font-size (24px)

web_core structural styles define .g-icon at 20px, but the Lit Icon
component overrides this to 24px in its scoped styles. Add the same
override in componentSpecificStyles to maintain visual parity.

Author: lukasmoschitz

renderers/react/src/styles/index.ts

@@ -124,6 +124,9 @@ export const componentSpecificStyles: string = `
   min-height: 0;
   overflow: auto;
 }
+:where(.a2ui-surface .a2ui-icon) .g-icon {
+  font-size: 24px;
+}
 
 .a2ui-surface .a2ui-tabs {
   display: block;