Use monospace uppercase titles on pre-installed app cards

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 9a40bd2b-c57f-4e6c-b220-4c469c781eca

Author: martinwoodward

src/components/preinstalled-app-card.astro

@@ -14,7 +14,7 @@ const { title, description, iconSrc, color } = Astro.props
     <img src={iconSrc} alt="" class="h-8 w-8" loading="lazy" />
   </div>
   <div class="min-w-0 flex-1">
-    <h3 class="mb-1 font-sans text-base font-semibold normal-case tracking-tight">{title}</h3>
+    <h3 class="mb-1.5 font-mono text-sm uppercase tracking-[0.12em]">{title}</h3>
     <p class="text-sm leading-6 text-muted-foreground">{description}</p>
   </div>
 </div>