'update'

ipad_app/Sources/ContentView.swift

@@ -0,0 +1,51 @@
+#if os(iOS)
+import SwiftUI
+
+struct ContentView: View {
+    @EnvironmentObject var importer: BundleImporter
+    @EnvironmentObject var libraryVM: LibraryViewModel
+
+    @State private var tab = 0
+
+    var body: some View {
+        TabView(selection: $tab) {
+            NavigationStack {
+                BookListView(importer: importer, vm: libraryVM)
+            }
+            .tabItem { Label("书库", systemImage: "books.vertical") }
+            .tag(0)
+
+            NavigationStack {
+                if let index = importer.index {
+                    StatsView(index: index)
+                } else {
+                    VStack(spacing: 16) {
+                        Text("尚未导入数据包")
+                        Button("导入 iPad 导出包") { importer.presentPicker() }
+                    }.padding()
+                }
+            }
+            .tabItem { Label("统计", systemImage: "chart.bar") }
+            .tag(1)
+
+            NavigationStack {
+                ScrollView { VStack(alignment:.leading, spacing: 12) {
+                    Text("关于").font(.title2).bold()
+                    Text("离线阅读与统计查看器。加载 Python 导出的 iPad Bundle。")
+                    Button("重新导入") { importer.presentPicker() }
+                    if let p = importer.lastImportedURL {
+                        Text("最近: \(p.lastPathComponent)").font(.footnote).foregroundColor(.secondary)
+                    }
+                }.padding() }
+            }
+            .tabItem { Label("关于", systemImage: "info.circle") }
+            .tag(2)
+        }
+        .onReceive(importer.$bundleIndex) { newIndex in
+            if let newIndex {
+                libraryVM.attach(index: newIndex)
+            }
+        }
+    }
+}
+#endif