Remove host files and uninstall agent when deleting hosts

src/lib/ui/components/DeleteHostDialog.svelte

@@ -4,7 +4,7 @@
     import Dialog from './primitives/Dialog.svelte';
 
     let { open = $bindable(false), host, ondeleted }:
-        { open?: boolean; host: Pick<Host, 'id' | 'name'> | null; ondeleted: () => void | Promise<void> } = $props();
+        { open?: boolean; host: Pick<Host, 'id' | 'name'> | null; ondeleted: (result: { deleted: boolean; operationId?: string }) => void | Promise<void> } = $props();
     let deletion = $state<HostDeletion | null>(null);
     let checking = $state(false); let deleting = $state(false); let error = $state('');
 
@@ -36,19 +36,20 @@
                 throw new Error(body.error ?? body.message ?? 'Could not delete this host.');
             }
             open = false;
-            await ondeleted();
+            await ondeleted(body);
         } catch (cause) { error = (cause as Error).message; }
         finally { deleting = false; }
     }
 </script>
 
 <Dialog bind:open title={`Delete ${host?.name ?? 'host'}?`} busy={deleting}
-    description="Remove this host from Electric Cherry and revoke its agent access and unused installer links.">
+    description="Permanently remove Electric Cherry's files from this host, including its downloaded game files, then uninstall the agent.">
     <div class="content">
-        <p>The agent and game files stay on the machine. Published game libraries and operation history are kept. Commands that have never been sent to the host will be cancelled.</p>
+        <p>This deletes the host's game-library copies, server files, agent data, credentials, and service installation. Electric Cherry's uploaded libraries on the controller and its operation history are kept.</p>
+        <p>The host remains visible until cleanup is confirmed. Offline hosts wait for reconnection. Unsent commands will be cancelled.</p>
         {#if checking}<p role="status">Checking servers and unfinished operations…</p>
         {:else if deletion && !deletion.allowed}<div role="status" class="blocked"><strong>This host still has work to finish:</strong><ul>{#each deletion.blockers as blocker}<li>{blocker}</li>{/each}</ul><p>Open <a href={`/hosts/${host?.id}`} onclick={() => open = false}>host details</a> to review its operations or drain its servers.</p></div>
-        {:else if deletion?.allowed}<p>This host is ready to delete. Adding it again requires a new enrollment.</p>{/if}
+        {:else if deletion?.allowed}<p>Cleanup cannot be undone once it starts. Adding this machine again requires installing and enrolling the agent again.</p>{/if}
         {#if error}<p role="alert" class="ui-error">{error}</p>{/if}
     </div>
     {#snippet actions()}