Separate game file downloads and verification with progress timing

src/lib/hosts.ts

@@ -1,3 +1,5 @@
+import type { HostLibraryCache } from './game-files.js';
+
 export type HostMode = 'active' | 'draining' | 'disabled';
 export type HostReadiness = 'preparing' | 'needs-runtime' | 'needs-game-files' | 'ready' | 'degraded' | 'draining' | 'disabled' | 'deleting';
 export type HostOperationState = 'pending' | 'accepted' | 'running' | 'completed' | 'failed' | 'unknown';
@@ -86,6 +88,7 @@ export interface HostPreparationItem {
     kind: 'runtime' | 'library'; label: string;
     state: 'waiting' | 'preparing' | 'ready' | 'blocked'; detail: string;
     operationId?: string; bytesDownloaded?: number; bytesTotal?: number;
+    cache?: HostLibraryCache;
 }
 export interface HostPreparation {
     state: HostPreparationItem['state']; items: HostPreparationItem[];