feat(ui): topbar settings, hide dev badge, premium fleet cards

Collapse the redundant left workspace nav (overview is already the home
surface) and move Settings into the top bar. Hide placeholder `dev`
version badges. Restyle fleet cards with softer elevation, status
summary chips, hover sheen, and reduced-motion-safe entrance motion.

apps/web/src/fleet/fleet-page.tsx

@@ -497,8 +497,8 @@ export function FleetPage({
     <section className="fleet-panel" aria-labelledby="fleet-title">
       <div className="fleet-heading">
         <div>
-          <h1 id="fleet-title">实例总览</h1>
-          <p>查找、对比并管理所有 SimAdmin 实例。</p>
+          <h1 id="fleet-title">实例舰队</h1>
+          <p>资源优先总览，查找并管理全部 SimAdmin 实例。</p>
         </div>
         <div className="fleet-actions">
           <a className="primary-action" href="/instances/new">