feat(ios): IOS-M1-05 我的页面资产摘要 + 存储空间

- ProfileView 新增学习资产行（KB数/知识点/复习卡）
- 新增存储空间行（已用/总量）
- 新增消息中心快捷入口
- UserService 新增 fetchAssets()/fetchStorage()
- ProfileViewModel 新增 loadStats()

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

AIStudyApp/AIStudyApp/Core/Services/APIService.swift

@@ -85,6 +85,14 @@ class UserService {
     func removeDevice(id: String) async throws -> GenericSuccessResponse {
         return try await client.request("/users/me/devices/\(id)", method: "DELETE")
     }
+
+    func fetchAssets() async throws -> AssetsResponse {
+        return try await client.request("/users/me/assets-summary")
+    }
+
+    func fetchStorage() async throws -> StorageResponse {
+        return try await client.request("/users/me/storage")
+    }
 }
 
 struct UserDevice: Codable, Identifiable {

AIStudyApp/AIStudyApp/Features/Profile/ProfileView.swift

@@ -44,7 +44,7 @@ struct ProfileView: View {
                             ZXProfileMenuRow(icon: "bubble.left.fill", title: "帮助与反馈", desc: "问题报告 · 功能建议")
                         }.foregroundColor(.primary)
                     }.background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 20)).overlay(RoundedRectangle(cornerRadius: 20).stroke(Color.zxBorder006, lineWidth: 1))
-                    achievementsSection.padding(.bottom, 120)
+                    assetsSection.padding(.bottom, 120)
                 }.padding(.horizontal, 20)
             }.scrollIndicators(.hidden)
         }
@@ -94,10 +94,37 @@ struct ProfileView: View {
         .accessibilityLabel("编辑个人资料，\(profile?.nickname ?? "学习者")")
         .accessibilityHint("双击查看和编辑个人资料")
     }
-    private var achievementsSection: some View {
+    private var assetsSection: some View {
-        VStack(alignment: .leading, spacing: 12) {
+        VStack(spacing: 16) {
-            Text("成就").font(.system(size: 15, weight: .bold)).foregroundColor(Color.zxF0)
+            // 学习资产
-            HStack(spacing: 8) { ZXAchievementBadge(icon: "flame.fill", label: "连续 14 天", color: Color.zxOrange); ZXAchievementBadge(icon: "brain.head.profile", label: "费曼达人", color: Color.zxPurple); ZXAchievementBadge(icon: "books.vertical.fill", label: "知识收藏家", color: Color.zxTeal); ZXAchievementBadge(icon: "bolt.fill", label: "速学者", color: Color.zxYellow) }
+            VStack(spacing: 0) {
+                NavigationLink(value: Route.libraryCreate) {
+                    HStack {
+                        Image(systemName: "books.vertical.fill").font(.system(size: 18)).foregroundColor(Color.zxPurple).frame(width: 36, height: 36).background(Color.zxPurpleBG(0.12)).clipShape(RoundedRectangle(cornerRadius: 10))
+                        Text("学习资产").font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF0)
+                        Spacer()
+                        Text("\(viewModel.kbCount)库 \(viewModel.itemCount)项 \(viewModel.cardCount)卡").font(.system(size: 12)).foregroundColor(Color.zxF04)
+                        Image(systemName: "chevron.right").font(.system(size: 12)).foregroundColor(Color.zxF03)
+                    }.padding(.horizontal, 16).padding(.vertical, 14)
+                }.foregroundColor(.primary)
+                ZXProfileDivider()
+                NavigationLink(value: Route.notificationList) {
+                    HStack {
+                        Image(systemName: "bell.fill").font(.system(size: 18)).foregroundColor(Color.zxOrange).frame(width: 36, height: 36).background(Color.zxOrange.opacity(0.12)).clipShape(RoundedRectangle(cornerRadius: 10))
+                        Text("消息中心").font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF0)
+                        Spacer(); Image(systemName: "chevron.right").font(.system(size: 12)).foregroundColor(Color.zxF03)
+                    }.padding(.horizontal, 16).padding(.vertical, 14)
+                }.foregroundColor(.primary)
+                ZXProfileDivider()
+                HStack {
+                    Image(systemName: "externaldrive.fill").font(.system(size: 18)).foregroundColor(Color.zxTeal).frame(width: 36, height: 36).background(Color.zxTeal.opacity(0.12)).clipShape(RoundedRectangle(cornerRadius: 10))
+                    VStack(alignment: .leading, spacing: 2) {
+                        Text("存储空间").font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF0)
+                        Text(viewModel.formattedStorage).font(.system(size: 11)).foregroundColor(Color.zxF04)
+                    }
+                    Spacer(); Image(systemName: "chevron.right").font(.system(size: 12)).foregroundColor(Color.zxF03)
+                }.padding(.horizontal, 16).padding(.vertical, 14)
+            }.background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 20)).overlay(RoundedRectangle(cornerRadius: 20).stroke(Color.zxBorder006, lineWidth: 1))
         }
     }
 }

AIStudyApp/AIStudyApp/Features/Profile/ProfileViewModel.swift

@@ -7,49 +7,49 @@ class ProfileViewModel: ObservableObject {
     @Published var preferences: UserPreferences?
     @Published var profileData: UserProfileData?
     @Published var summary: ActivitySummary?
+    @Published var kbCount = 0, itemCount = 0, cardCount = 0
+    @Published var usedBytes = 0, totalBytes = 1073741824
     @Published var isLoading = false
     @Published var errorMessage: String?
 
+    var formattedStorage: String {
+        if usedBytes < 1024 * 1024 { return "\(usedBytes / 1024) KB / \(totalBytes / 1024 / 1024 / 1024) GB" }
+        return String(format: "%.0f MB / %d GB", Double(usedBytes) / 1024 / 1024, totalBytes / 1024 / 1024 / 1024)
+    }
+
     func loadAll() async {
-        isLoading = true
+        isLoading = true; errorMessage = nil
-        errorMessage = nil
         await loadProfile()
         isLoading = false
         Task { await loadActivitySummary() }
+        Task { await loadStats() }
     }
 
     func loadProfile() async {
-        do {
+        do { let p = try await UserService.shared.myProfile(); userProfile = p; preferences = p.preferences; profileData = p.profile } catch { if userProfile == nil { errorMessage = "加载用户信息失败" } }
-            let profile = try await UserService.shared.myProfile()
-            userProfile = profile
-            preferences = profile.preferences
-            profileData = profile.profile
-        } catch {
-            if userProfile == nil { errorMessage = "加载用户信息失败" }
-        }
     }
+    func updatePreferences(_ dto: UpdatePreferencesRequest) async { do { preferences = try await UserService.shared.updatePreferences(dto) } catch { errorMessage = "保存设置失败" } }
+    func updateProfileDetail(_ dto: UpdateProfileDataRequest) async { do { profileData = try await UserService.shared.updateProfileDetail(dto) } catch { errorMessage = "保存学习档案失败" } }
+    private func loadActivitySummary() async { do { summary = try await ActivityService.shared.summary() } catch {} }
 
-    func updatePreferences(_ dto: UpdatePreferencesRequest) async {
+    private func loadStats() async {
-        do {
+        async let a: AssetsResponse? = try? UserService.shared.fetchAssets()
-            preferences = try await UserService.shared.updatePreferences(dto)
+        async let s: StorageResponse? = try? UserService.shared.fetchStorage()
-        } catch {
+        if let assets = await a { kbCount = assets.knowledgeBaseCount; itemCount = assets.knowledgeItemCount; cardCount = assets.reviewCardCount }
-            errorMessage = "保存设置失败"
+        if let storage = await s { usedBytes = storage.usedBytes; totalBytes = storage.totalBytes }
-        }
-    }
-
-    func updateProfileDetail(_ dto: UpdateProfileDataRequest) async {
-        do {
-            profileData = try await UserService.shared.updateProfileDetail(dto)
-        } catch {
-            errorMessage = "保存学习档案失败"
-        }
-    }
-
-    private func loadActivitySummary() async {
-        do {
-            summary = try await ActivityService.shared.summary()
-        } catch {
-            // non-critical, stats remain at 0
-        }
     }
 }
+
+// MARK: - Raw API models
+
+struct AssetsResponse: Codable {
+    let knowledgeBaseCount: Int
+    let knowledgeItemCount: Int
+    let reviewCardCount: Int
+}
+
+struct StorageResponse: Codable {
+    let usedBytes: Int
+    let totalBytes: Int
+    let fileCount: Int
+}