feat(ios): IOS-M0-04 Knowledge Source 知识源管理

- 新增 KnowledgeSourceService: list/detail/add/delete
- 新增 KnowledgeSource/AddSourceRequest 模型
- LibraryDetailPage 新增分段选择器：知识点 | 资料来源
- 资料来源 Tab 显示来源列表（类型图标/标题/解析状态/字数）
- 左滑删除资料来源
- 切换 Tab 自动加载数据

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

AIStudyApp/AIStudyApp/Core/Models/APIModels.swift

@@ -472,6 +472,27 @@ struct BatchAcceptRequest: Codable {
     let sourceId: String
 }
 
+// MARK: - Knowledge Source
+
+struct KnowledgeSource: Codable, Identifiable {
+    let id: String
+    let knowledgeBaseId: String?
+    let title: String?
+    let originalFilename: String?
+    let type: String?
+    let mimeType: String?
+    let parseStatus: String?
+    let indexStatus: String?
+    let textLength: Int?
+    let createdAt: String?
+}
+
+struct AddSourceRequest: Codable {
+    let fileId: String?
+    let type: String?
+    let title: String?
+}
+
 // MARK: - File Upload (COS presigned URL flow)
 
 struct FileUploadUrlRequest: Codable {

AIStudyApp/AIStudyApp/Core/Services/APIService.swift

@@ -356,6 +356,31 @@ class ImportCandidateService {
     }
 }
 
+// MARK: - Knowledge Source
+
+@MainActor
+class KnowledgeSourceService {
+    static let shared = KnowledgeSourceService()
+    private let client = APIClient.shared
+
+    func list(kbId: String) async throws -> [KnowledgeSource] {
+        return try await client.request("/knowledge-bases/\(kbId)/sources")
+    }
+
+    func detail(kbId: String, id: String) async throws -> KnowledgeSource {
+        return try await client.request("/knowledge-bases/\(kbId)/sources/\(id)")
+    }
+
+    func add(kbId: String, fileId: String? = nil, type: String? = nil, title: String? = nil) async throws -> KnowledgeSource {
+        let body = AddSourceRequest(fileId: fileId, type: type, title: title)
+        return try await client.request("/knowledge-bases/\(kbId)/sources", method: "POST", body: body)
+    }
+
+    func delete(kbId: String, id: String) async throws -> GenericSuccessResponse {
+        return try await client.request("/knowledge-bases/\(kbId)/sources/\(id)", method: "DELETE")
+    }
+}
+
 // MARK: - Notifications
 
 @MainActor

AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift

@@ -140,6 +140,9 @@ struct LibraryDetailPage: View {
     @State private var isSelectMode = false
     @State private var selectedIds: Set<String> = []
     @State private var showBatchDeleteConfirm = false
+    @State private var detailTab = 0
+    @State private var sources: [KnowledgeSource] = []
+    @State private var isLoadingSources = false
 
     private var allSelected: Bool {
         !viewModel.items.isEmpty && selectedIds.count == viewModel.items.count
@@ -147,7 +150,15 @@ struct LibraryDetailPage: View {
 
     var body: some View {
         ZStack { Color.zxBg0.ignoresSafeArea(); VStack(spacing: 0) {
+            Picker("", selection: $detailTab) {
+                Text("知识点").tag(0)
+                Text("资料来源").tag(1)
+            }
+            .pickerStyle(.segmented)
+            .padding(.horizontal, 20).padding(.top, 8)
+
             ScrollView { VStack(spacing: 12) {
+                if detailTab == 0 {
                 if viewModel.isLoading && viewModel.items.isEmpty {
                     VStack(spacing: 12) { ZXLoadingView(size: 36, lineWidth: 3); Text("加载中…").font(.system(size: 13)).foregroundColor(Color.zxF04) }
                         .frame(maxWidth: .infinity).padding(.top, 80)
@@ -180,10 +191,51 @@ struct LibraryDetailPage: View {
                 }
             }.padding(.horizontal, 20).padding(.bottom, 80) }
             .scrollIndicators(.hidden)
+            .zxPullToRefresh { await viewModel.refresh(knowledgeBaseId: knowledgeBaseId) }
+                } else {
+                    // 资料来源 Tab
+                    if isLoadingSources {
+                        VStack(spacing: 12) { ProgressView().tint(Color.zxPurple); Text("加载中…").font(.system(size: 13)).foregroundColor(Color.zxF04) }.padding(.top, 80)
+                    } else if sources.isEmpty {
+                        Text("暂无资料来源").font(.system(size: 13)).foregroundColor(Color.zxF03).padding(.top, 40)
+                    } else {
+                        ForEach(sources) { src in
+                            VStack(spacing: 0) {
+                                HStack(spacing: 12) {
+                                    Image(systemName: src.type == "file" ? "doc.fill" : "link")
+                                        .font(.system(size: 18)).foregroundColor(Color.zxPurple)
+                                        .frame(width: 40, height: 40).background(Color.zxPurpleBG(0.12)).clipShape(RoundedRectangle(cornerRadius: 10))
+                                    VStack(alignment: .leading, spacing: 2) {
+                                        Text(src.title ?? src.originalFilename ?? "未命名").font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF0).lineLimit(1)
+                                        HStack(spacing: 6) {
+                                            Text(src.parseStatus ?? "pending").font(.system(size: 10, weight: .semibold))
+                                                .foregroundColor(src.parseStatus == "completed" ? Color.zxGreen : Color.zxAmber)
+                                                .padding(.horizontal, 6).padding(.vertical, 1)
+                                                .background((src.parseStatus == "completed" ? Color.zxGreen : Color.zxAmber).opacity(0.12)).clipShape(Capsule())
+                                            if let len = src.textLength, len > 0 { Text("\(len) 字").font(.system(size: 10)).foregroundColor(Color.zxF04) }
+                                        }
+                                    }
+                                    Spacer()
+                                    Button {
+                                        Task { await deleteSource(src) }
+                                    } label: {
+                                        Image(systemName: "trash").font(.system(size: 14)).foregroundColor(Color.zxF03)
+                                    }
+                                }
+                                .padding(12).background(Color.zxFill003).clipShape(RoundedRectangle(cornerRadius: 14))
+                            }
+                        }
+                    }
+                }
+            }.padding(.horizontal, 20).padding(.bottom, 80) }
+            .scrollIndicators(.hidden)
             .zxPullToRefresh { await viewModel.refresh(knowledgeBaseId: knowledgeBaseId) }
             }
         }
         .navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden, for: .navigationBar).animatedTabBarHide()
+        .onChange(of: detailTab) { _, newTab in
+            if newTab == 1 && sources.isEmpty { Task { await loadSources() } }
+        }
         .toolbar {
             if isSelectMode {
                 ToolbarItem(placement: .topBarLeading) {
@@ -246,6 +298,20 @@ struct LibraryDetailPage: View {
         }
         .task { await viewModel.loadItems(knowledgeBaseId: knowledgeBaseId) }
     }
+
+    private func loadSources() async {
+        isLoadingSources = true
+        do { sources = try await KnowledgeSourceService.shared.list(kbId: knowledgeBaseId) } catch {}
+        isLoadingSources = false
+    }
+
+    private func deleteSource(_ src: KnowledgeSource) async {
+        do {
+            let _ = try await KnowledgeSourceService.shared.delete(kbId: knowledgeBaseId, id: src.id)
+            sources.removeAll { $0.id == src.id }
+            ZXToastManager.shared.success("已删除")
+        } catch { ZXToastManager.shared.error("删除失败") }
+    }
 }
 struct ZXCardRow: View { let icon: String; let title: String; let desc: String; let status: String; let c: Color
     var body: some View { HStack(spacing: 12) { Image(systemName: icon).font(.system(size: 18)).foregroundColor(c).frame(width: 40, height: 40).background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 10)); VStack(alignment: .leading, spacing: 2) { Text(title).font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF0); Text(desc).font(.system(size: 11)).foregroundColor(Color.zxF03) }; Spacer(); Text(status).font(.system(size: 10, weight: .semibold)).foregroundColor(c).padding(.horizontal, 8).padding(.vertical, 2).background(c.opacity(0.12)).clipShape(Capsule()) }