Update src/app/page.tsx

Merge version_1 into main

src/app/page.tsx

@@ -168,8 +168,8 @@ export default function LandingPage() {
             },
             {
               id: "2",              badge: "Professional",              badgeIcon: Sparkles,
-              price: "$99/year",              subtitle: "Best for serious authors",              features: [
+              price: "$99/year",              subtitle: "Best for serious authors — Most popular choice",              features: [
-                "Unlimited books",                "Premium ISBN included",                "Professional cover designer",                "Print + digital distribution",                "Royalty tracking dashboard",                "Email support"],
+                "Unlimited books",                "Premium ISBN included",                "Professional cover designer",                "Print + digital distribution",                "Marketing tools included",                "Royalty tracking dashboard",                "Email support"],
             },
             {
               id: "3",              badge: "Elite",              badgeIcon: Crown,
@@ -280,4 +280,4 @@ export default function LandingPage() {
       </div>
     </ThemeProvider>
   );
-}
+}