'update'

ipad_app/Sources/Views/BookDetailView.swift

@@ -0,0 +1,55 @@
+#if os(iOS)
+import SwiftUI
+
+@available(macOS 10.15, iOS 13.0, *)
+struct BookDetailView: View {
+    let book: BookMeta
+    let index: BundleIndex
+    let bundleDir: URL
+
+    var annotations: [AnnotationRow] { index.annotationsMap[book.id] ?? [] }
+    var review: String? { index.bookIntro[book.title] }
+
+    var body: some View {
+        NavigationStack {
+            ScrollView {
+                VStack(alignment: .leading, spacing: 16) {
+                    HStack(alignment:.top, spacing:16) {
+                        CoverImageView(book: book, bundleDir: bundleDir).frame(width:120,height:170)
+                        VStack(alignment:.leading, spacing:8) {
+                            Text(book.title).font(.title2).bold()
+                            Text(book.author).foregroundColor(.secondary)
+                            if let y = book.readtime_year { Text("全年阅读 \(y/60) 小时").font(.callout) }
+                            if book.is_finished_this_year == true { Text("今年已读完 ✅").font(.caption).foregroundColor(.green) }
+                        }
+                        Spacer()
+                    }
+                    if let review = review, !review.isEmpty {
+                        VStack(alignment:.leading, spacing:8) {
+                            Text("书籍简评").font(.headline)
+                            Text(review).font(.body)
+                        }
+                    }
+                    if !annotations.isEmpty {
+                        VStack(alignment:.leading, spacing:8) {
+                            Text("批注 (\(annotations.count))").font(.headline)
+                            ForEach(annotations) { ann in
+                                VStack(alignment:.leading, spacing:4) {
+                                    if let sel = ann.selected { Text(sel).font(.body) }
+                                    if let note = ann.note, !note.isEmpty { Text("✎ " + note).font(.footnote).foregroundColor(.secondary) }
+                                    Divider()
+                                }
+                            }
+                        }
+                    } else {
+                        Text("无批注").foregroundColor(.secondary)
+                    }
+                }
+                .padding()
+            }
+            .navigationTitle("详情")
+            .navigationBarTitleDisplayMode(.inline)
+        }
+    }
+}
+#endif