Optimized version selector spacing for consistency

- **Reduced top padding** from py-16 to pt-8 (64px to 32px) to bring search closer to top
- **Adjusted search margin** from mb-8 to mb-4 (32px to 16px) for uniform spacing
- **Maintained bottom spacing** with pb-16 to preserve version card layout
- **Perfect alignment** with other pages - consistent 16px search-to-element gap

Version selector now has perfectly balanced, consistent spacing throughout the app!

frontend/src/components/VersionSelector.tsx

@@ -10,9 +10,9 @@ const VersionSelector: React.FC<VersionSelectorProps> = ({ onVersionSelect, onSe
   return (
     <div>
       {/* Version Selection */}
-      <div className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8 py-16">
+      <div className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8 pt-8 pb-16">
         {/* Search Bar */}
-        <div className="flex justify-center mb-8">
+        <div className="flex justify-center mb-4">
           <div className="w-full max-w-md relative">
             <input
               type="text"