refactor: improve CallToAction typography and AgentBento mobile layout across pages

- Added leading-normal to all CallToAction description paragraphs for better readability
- Changed AgentBento empty animation placeholder to hidden on mobile using hidden md:flex
- Reduced top margin from mt-8 to mt-6 for agents CallToAction CTA cards
- Changed "Follow Development" link margin from mt-5 to lg:mt-5 mt-0 for responsive spacing
- Applied leading-normal changes to agents, compute, gpu, home, network, nodes

src/pages/gpu/CallToAction.tsx

@@ -43,7 +43,7 @@ export function CallToAction() {
               Choose How You Want to Start
             </h2>
 
-            <p className="mt-6 text-lg text-gray-300">
+            <p className="mt-6 text-lg leading-normal text-gray-300">
               Use GPUs through Mycelium Cloud, or contribute GPU nodes to the mesh and run your own workloads.
             </p>