Add manual cloud backup controls and manager modal

ui/ui-status.js

@@ -61,6 +61,12 @@ export function createGraphPersistenceState() {
     lastSyncUploadedAt: 0,
     lastSyncDownloadedAt: 0,
     lastSyncedRevision: 0,
+    lastBackupUploadedAt: 0,
+    lastBackupRestoredAt: 0,
+    lastBackupRollbackAt: 0,
+    lastBackupFilename: "",
+    syncDirty: false,
+    syncDirtyReason: "",
     lastSyncError: "",
     dualWriteLastResult: null,
     updatedAt: new Date().toISOString(),