Clarify host readiness when game files or runtime are missing

src/routes/hosts/[id]/+page.svelte

@@ -3,6 +3,7 @@
     import { page } from '$app/stores';
     import { goto } from '$app/navigation';
     import type { Host, HostOperation, HostMode } from '$lib/hosts.js';
+    import { hostReadinessLabel } from '$lib/hosts.js';
     import SectionHeader from '$ui/components/primitives/SectionHeader.svelte';
     import Button from '$ui/components/primitives/Button.svelte';
     import DeleteHostDialog from '$ui/components/DeleteHostDialog.svelte';
@@ -36,8 +37,9 @@
 </SectionHeader>
     {#if error}<p class="ui-error" role="alert">{error}</p>{/if}{#if notice}<p role="status">{notice}</p>{/if}
     {#if loading}<p role="status">Loading host…</p>{:else if host}
-        <section class="panel"><div class="row"><h2>{host.connectionState} · {host.readiness}</h2><span>Last heartbeat: {host.lastHeartbeat ? new Date(host.lastHeartbeat).toLocaleString() : 'Never'}</span></div>
+        <section class="panel"><div class="row"><h2>{host.connectionState} · {hostReadinessLabel(host.readiness)}</h2><span>Last heartbeat: {host.lastHeartbeat ? new Date(host.lastHeartbeat).toLocaleString() : 'Never'}</span></div>
             {#if host.readinessReasons.length}<ul>{#each host.readinessReasons as reason}<li>{reason}</li>{/each}</ul>{:else}<p>Connected and ready. Each deployment also checks its game library, runtime, and ports.</p>{/if}
+            {#if host.readiness === 'needs-game-files'}<p><a href="/game-files">Choose a published game-file version and download it to this host →</a></p>{/if}
             {#if canManage}<div class="actions"><Button disabled={busy || host.mode === 'active'} onclick={() => mode('active')}>Enable</Button><Button disabled={busy || host.mode === 'draining'} onclick={() => mode('draining')}>Drain host</Button><Button disabled={busy || host.mode === 'disabled'} onclick={() => mode('disabled')}>Disable host</Button></div>{/if}
             <p>Draining prevents new deployments and retires instances as they become safe to remove. Disabled hosts receive no new commands; running game containers continue.</p>
         </section>