feat(ios): IOS-M0-03 Import Candidate 候选知识点审批

- 新增 ImportCandidateService: listBySource/detail/update/accept/reject/batchAccept
- 新增 ImportCandidate/BatchAcceptRequest 模型
- 新增 ImportReviewPage 审批页面:
  - 候选列表（置信度标签 + 标题 + 内容摘要）
  - 点击展开 → 接受/拒绝按钮
  - 全部接受批量操作
  - 空状态 + 加载态
- Route 新增 importReview(sourceId:)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

AIStudyApp/AIStudyApp/Core/Models/APIModels.swift

@@ -456,6 +456,22 @@ struct ImportStatusResponse: Codable {
     let itemCount: Int?
 }
 
+// MARK: - Import Candidate
+
+struct ImportCandidate: Codable, Identifiable {
+    let id: String
+    let sourceId: String?
+    let title: String?
+    let content: String?
+    let status: String?
+    let confidence: Double?
+    let createdAt: String?
+}
+
+struct BatchAcceptRequest: Codable {
+    let sourceId: String
+}
+
 // MARK: - File Upload (COS presigned URL flow)
 
 struct FileUploadUrlRequest: Codable {

AIStudyApp/AIStudyApp/Core/Navigation/Route.swift

@@ -22,6 +22,9 @@ enum Route: Hashable {
     case learningSession(taskTitle: String, taskType: String, taskColorHex: String)
     case studyHome
 
+    // Import
+    case importReview(sourceId: String)
+
     // Profile
     case notificationList
     case settings
@@ -60,6 +63,7 @@ extension Route {
         case .methodPreference:   MethodPreferenceView()
         case .feedbackForm:       FeedbackFormView()
         case .editProfile:        EditProfilePage()
+        case .importReview(let sourceId): ImportReviewPage(sourceId: sourceId)
         }
     }
 }

AIStudyApp/AIStudyApp/Core/Services/APIService.swift

@@ -320,6 +320,42 @@ class DocumentImportService {
     }
 }
 
+// MARK: - Import Candidate
+
+@MainActor
+class ImportCandidateService {
+    static let shared = ImportCandidateService()
+    private let client = APIClient.shared
+
+    func listBySource(sourceId: String) async throws -> [ImportCandidate] {
+        return try await client.request("/knowledge-sources/\(sourceId)/import-candidates")
+    }
+
+    func detail(id: String) async throws -> ImportCandidate {
+        return try await client.request("/import-candidates/\(id)")
+    }
+
+    func update(id: String, title: String?, content: String?) async throws -> ImportCandidate {
+        var body: [String: String] = [:]
+        if let t = title { body["title"] = t }
+        if let c = content { body["content"] = c }
+        return try await client.request("/import-candidates/\(id)", method: "PATCH", body: body)
+    }
+
+    func accept(id: String) async throws -> GenericSuccessResponse {
+        return try await client.request("/import-candidates/\(id)/accept", method: "POST")
+    }
+
+    func reject(id: String) async throws -> GenericSuccessResponse {
+        return try await client.request("/import-candidates/\(id)/reject", method: "POST")
+    }
+
+    func batchAccept(sourceId: String) async throws -> GenericSuccessResponse {
+        let body = BatchAcceptRequest(sourceId: sourceId)
+        return try await client.request("/import-candidates/batch-accept", method: "POST", body: body)
+    }
+}
+
 // MARK: - Notifications
 
 @MainActor

AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift

@@ -682,6 +682,135 @@ struct ImportPage: View {
 struct ZXImportRow: View { let icon: String; let title: String; let desc: String
     var body: some View { HStack(spacing: 14) { Image(systemName: icon).font(.system(size: 22)).foregroundColor(Color.zxPurple).frame(width: 48, height: 48).background(Color.zxPurpleBG(0.1)).clipShape(RoundedRectangle(cornerRadius: 14)); VStack(alignment: .leading, spacing: 2) { Text(title).font(.system(size: 15, weight: .semibold)).foregroundColor(Color.zxF0); Text(desc).font(.system(size: 12)).foregroundColor(Color.zxF04) }; Spacer(); Image(systemName: "chevron.right").font(.system(size: 12)).foregroundColor(Color.zxF03) }.padding(16).background(Color.zxFill003).clipShape(RoundedRectangle(cornerRadius: 16)).overlay(RoundedRectangle(cornerRadius: 16).stroke(Color.zxBorder006, lineWidth: 1)) }
 
+// MARK: - Import Review
+
+struct ImportReviewPage: View {
+    let sourceId: String
+    @Environment(\.dismiss) private var dismiss
+    @State private var candidates: [ImportCandidate] = []
+    @State private var isLoading = true
+    @State private var isProcessing = false
+    @State private var errorMessage: String?
+    @State private var expandedId: String?
+
+    var body: some View {
+        ZStack { Color.zxBg0.ignoresSafeArea(); VStack(spacing: 0) {
+            if isLoading {
+                VStack(spacing: 12) { ProgressView().tint(Color.zxPurple); Text("加载候选...").font(.system(size: 13)).foregroundColor(Color.zxF04) }
+                    .frame(maxWidth: .infinity, maxHeight: .infinity)
+            } else if candidates.isEmpty {
+                VStack(spacing: 12) {
+                    Image(systemName: "checkmark.circle").font(.system(size: 36)).foregroundColor(Color.zxGreen)
+                    Text("没有待审批的候选").font(.system(size: 14)).foregroundColor(Color.zxF04)
+                }.frame(maxWidth: .infinity, maxHeight: .infinity)
+            } else {
+                ScrollView {
+                    VStack(spacing: 12) {
+                        HStack {
+                            Text("\(candidates.count) 个候选知识点").font(.system(size: 13, weight: .medium)).foregroundColor(Color.zxF04)
+                            Spacer()
+                            Button {
+                                Task { await batchAccept() }
+                            } label: {
+                                Text("全部接受").font(.system(size: 13, weight: .semibold)).foregroundColor(Color.zxPrimary)
+                            }
+                            .disabled(isProcessing)
+                        }
+                        ForEach(candidates) { c in
+                            VStack(spacing: 0) {
+                                Button {
+                                    withAnimation { expandedId = expandedId == c.id ? nil : c.id }
+                                } label: {
+                                    HStack(spacing: 12) {
+                                        if let conf = c.confidence {
+                                            Text("\(Int(conf * 100))%").font(.system(size: 10, weight: .bold))
+                                                .foregroundColor(conf > 0.7 ? Color.zxGreen : Color.zxAmber)
+                                                .padding(.horizontal, 6).padding(.vertical, 2)
+                                                .background((conf > 0.7 ? Color.zxGreen : Color.zxAmber).opacity(0.12))
+                                                .clipShape(Capsule())
+                                        }
+                                        VStack(alignment: .leading, spacing: 4) {
+                                            Text(c.title ?? "无标题").font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF0).lineLimit(1)
+                                            if let content = c.content {
+                                                Text(content).font(.system(size: 12)).foregroundColor(Color.zxF04).lineLimit(2)
+                                            }
+                                        }
+                                        Spacer()
+                                        Image(systemName: expandedId == c.id ? "chevron.up" : "chevron.down").font(.system(size: 12)).foregroundColor(Color.zxF03)
+                                    }
+                                    .padding(12).background(Color.zxFill003).clipShape(RoundedRectangle(cornerRadius: 14))
+                                }
+                                .foregroundColor(.primary)
+
+                                if expandedId == c.id {
+                                    HStack(spacing: 8) {
+                                        Button {
+                                            Task { await rejectCandidate(c) }
+                                        } label: {
+                                            Label("拒绝", systemImage: "xmark").font(.system(size: 13, weight: .medium))
+                                                .foregroundColor(Color.zxCoral).frame(maxWidth: .infinity).frame(height: 40)
+                                                .background(Color.zxCoral.opacity(0.1)).clipShape(RoundedRectangle(cornerRadius: 10))
+                                        }
+                                        Button {
+                                            Task { await acceptCandidate(c) }
+                                        } label: {
+                                            Label("接受", systemImage: "checkmark").font(.system(size: 13, weight: .medium))
+                                                .foregroundColor(Color.zxGreen).frame(maxWidth: .infinity).frame(height: 40)
+                                                .background(Color.zxGreen.opacity(0.1)).clipShape(RoundedRectangle(cornerRadius: 10))
+                                        }
+                                    }
+                                    .padding(.horizontal, 12).padding(.top, 8)
+                                }
+                            }
+                        }
+                    }
+                    .padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 100)
+                }
+                .scrollIndicators(.hidden)
+            }
+        }}
+        .navigationTitle("候选审批").navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden, for: .navigationBar).animatedTabBarHide()
+        .disabled(isProcessing)
+        .task { await load() }
+    }
+
+    private func load() async {
+        isLoading = true; errorMessage = nil
+        do { candidates = try await ImportCandidateService.shared.listBySource(sourceId: sourceId) } catch { errorMessage = error.localizedDescription }
+        isLoading = false
+    }
+
+    private func acceptCandidate(_ c: ImportCandidate) async {
+        isProcessing = true
+        do {
+            let _ = try await ImportCandidateService.shared.accept(id: c.id)
+            candidates.removeAll { $0.id == c.id }
+            ZXToastManager.shared.success("已接受")
+        } catch { ZXToastManager.shared.error("操作失败") }
+        isProcessing = false
+    }
+
+    private func rejectCandidate(_ c: ImportCandidate) async {
+        isProcessing = true
+        do {
+            let _ = try await ImportCandidateService.shared.reject(id: c.id)
+            candidates.removeAll { $0.id == c.id }
+            ZXToastManager.shared.success("已拒绝")
+        } catch { ZXToastManager.shared.error("操作失败") }
+        isProcessing = false
+    }
+
+    private func batchAccept() async {
+        isProcessing = true
+        do {
+            let _ = try await ImportCandidateService.shared.batchAccept(sourceId: sourceId)
+            candidates.removeAll()
+            ZXToastManager.shared.success("全部接受")
+        } catch { ZXToastManager.shared.error("操作失败") }
+        isProcessing = false
+    }
+}
+
 struct EditKnowledgePage: View {
     let item: KnowledgeItem
     @State private var title: String; @State private var content: String