'update'

ipad_app/Sources/ViewModels/LibraryViewModel.swift

@@ -0,0 +1,19 @@
+import Foundation
+import Combine
+
+@available(macOS 10.15, iOS 13.0, *)
+@MainActor
+final class LibraryViewModel: ObservableObject {
+    @Published var bundleIndex: BundleIndex?
+    @Published var searchText: String = ""
+
+    var filteredBooks: [BookMeta] {
+        guard let books = bundleIndex?.books else { return [] }
+        let q = searchText.trimmingCharacters(in: .whitespacesAndNewlines)
+        if q.isEmpty { return books.sorted { ($0.last_open ?? 0) > ($1.last_open ?? 0) } }
+        return books.filter { $0.title.localizedCaseInsensitiveContains(q) || $0.author.localizedCaseInsensitiveContains(q) }
+            .sorted { ($0.last_open ?? 0) > ($1.last_open ?? 0) }
+    }
+
+    func attach(index: BundleIndex) { self.bundleIndex = index }
+}