Simplify host overview and move enrollment into drawer

src/routes/hosts/+page.server.ts

@@ -1,4 +1,3 @@
-import { listHosts } from '$lib/server/hosts/index.js';
-import { presentHostPreparation } from '$lib/server/hosts/preparation.js';
+import { hostOverview } from '$lib/server/hosts/overview.js';
 
-export function load() { return { hosts: listHosts().map(presentHostPreparation) }; }
+export function load() { return { hosts: hostOverview(), serverNow: Date.now() }; }