diff --git a/AIStudyApp/AIStudyApp/AIStudyAppApp.swift b/AIStudyApp/AIStudyApp/AIStudyAppApp.swift
index 7c7f577..bba1b3b 100644
--- a/AIStudyApp/AIStudyApp/AIStudyAppApp.swift
+++ b/AIStudyApp/AIStudyApp/AIStudyAppApp.swift
@@ -34,6 +34,7 @@ struct AIStudyAppApp: App {
                 }
             }
             .preferredColorScheme(effectiveColorScheme)
+            .zxToast()
             .task {
                 await authManager.restoreSession()
             }
diff --git a/AIStudyApp/AIStudyApp/ContentView.swift b/AIStudyApp/AIStudyApp/ContentView.swift
index c3b6c6d..202b77e 100644
--- a/AIStudyApp/AIStudyApp/ContentView.swift
+++ b/AIStudyApp/AIStudyApp/ContentView.swift
@@ -13,14 +13,16 @@ struct ContentView: View {
             default: NavigationStack { AIHomeView() }
             }
             VStack { Spacer(); ZXTabBar(active: $selectedTab) }.ignoresSafeArea(edges: .bottom)
-        }.ignoresSafeArea(edges: .bottom)
+        }
+        .animation(.easeInOut(duration: 0.2), value: selectedTab)
+        .ignoresSafeArea(edges: .bottom)
     }
 }
 
 struct ZXTabBar: View {
     @Binding var active: String
     private let items = [("ai","AI","brain.head.profile"),("library","知识库","books.vertical.fill"),("study","学习","bolt.fill"),("analysis","分析","chart.bar.fill"),("profile","我的","person.fill")]
-    var body: some View{HStack(spacing:0){ForEach(items,id:\.0){item in let on=item.0==active;Button{active=item.0}label:{VStack(spacing:4){ZStack{if on{Circle().fill(Color.zxPurple.opacity(0.2)).frame(width:28,height:28).scaleEffect(1.4)};Image(systemName:item.2).font(.system(size:22,weight:on ? .semibold:.regular)).foregroundColor(on ? Color.zxPurple:Color.zxF03)};Text(item.1).font(.system(size:10,weight:on ? .semibold:.regular)).foregroundColor(on ? Color.zxPurple:Color.zxF03)}}.frame(maxWidth:.infinity)}}.padding(.top,6).padding(.bottom,34).frame(height:83).background(.ultraThinMaterial).background(Color.zxBg0.opacity(0.95)).overlay(alignment:.top){Rectangle().fill(Color.zxBorder008).frame(height:1)}}
+    var body: some View{HStack(spacing:0){ForEach(items,id:\.0){item in let on=item.0==active;Button{active=item.0}label:{VStack(spacing:4){ZStack{if on{Circle().fill(Color.zxPurple.opacity(0.2)).frame(width:28,height:28).scaleEffect(1.4)};Image(systemName:item.2).font(.system(size:22,weight:on ? .semibold:.regular)).foregroundColor(on ? Color.zxPurple:Color.zxF03)};Text(item.1).font(.system(size:10,weight:on ? .semibold:.regular)).foregroundColor(on ? Color.zxPurple:Color.zxF03)}}.frame(maxWidth:.infinity)}.accessibilityLabel("\(item.1)标签")}.padding(.top,6).padding(.bottom,34).frame(height:83).background(.ultraThinMaterial).background(Color.zxBg0.opacity(0.95)).overlay(alignment:.top){Rectangle().fill(Color.zxBorder008).frame(height:1)}}
 }
 
 struct ZXIconBtn: View {
@@ -56,5 +58,5 @@ struct ZXWeakRow: View {
 
 struct ZXAIInputBar: View {
     @Binding var text:String;let onSend:()->Void
-    var body: some View {HStack(spacing:10){Image(systemName:"sparkles").font(.system(size:16)).foregroundColor(Color.zxPurple);TextField("问 AI 任何学习问题…",text:$text).font(.system(size:14)).tint(Color.zxPurple);Spacer();Image(systemName:"mic.fill").font(.system(size:18)).foregroundColor(Color.zxF03);Button(action:onSend){Image(systemName:"arrow.up").font(.system(size:14,weight:.bold)).foregroundColor(.white).frame(width:30,height:30).background(ZXGradient.brand).clipShape(RoundedRectangle(cornerRadius:9))}}.padding(.horizontal,14).padding(.vertical,10).background(.ultraThinMaterial).background(Color.zxFill004).overlay(RoundedRectangle(cornerRadius:20).stroke(Color.zxBorder008,lineWidth:1)).clipShape(RoundedRectangle(cornerRadius:20)).padding(.horizontal,20).padding(.bottom,34)}
+    var body: some View {HStack(spacing:10){Image(systemName:"sparkles").font(.system(size:16)).foregroundColor(Color.zxPurple);TextField("问 AI 任何学习问题…",text:$text).font(.system(size:14)).tint(Color.zxPurple).accessibilityLabel("AI 学习问题输入框");Spacer();Image(systemName:"mic.fill").font(.system(size:18)).foregroundColor(Color.zxF03).accessibilityLabel("语音输入");Button(action:onSend){Image(systemName:"arrow.up").font(.system(size:14,weight:.bold)).foregroundColor(.white).frame(width:30,height:30).background(ZXGradient.brand).clipShape(RoundedRectangle(cornerRadius:9))}.zxPressable().disabled(text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty).accessibilityLabel("发送消息")}.padding(.horizontal,14).padding(.vertical,10).background(.ultraThinMaterial).background(Color.zxFill004).overlay(RoundedRectangle(cornerRadius:20).stroke(Color.zxBorder008,lineWidth:1)).clipShape(RoundedRectangle(cornerRadius:20)).padding(.horizontal,20).padding(.bottom,34)}
 }
diff --git a/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXAnimations.swift b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXAnimations.swift
new file mode 100644
index 0000000..be40087
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXAnimations.swift
@@ -0,0 +1,307 @@
+import SwiftUI
+
+// MARK: - Animated Button Style
+
+struct ZXButtonStyle: ButtonStyle {
+    let branded: Bool
+
+    init(branded: Bool = false) {
+        self.branded = branded
+    }
+
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .scaleEffect(configuration.isPressed ? 0.96 : 1.0)
+            .opacity(configuration.isPressed ? 0.85 : 1.0)
+            .animation(.easeOut(duration: 0.15), value: configuration.isPressed)
+            .sensoryFeedback(.impact(weight: .light), trigger: configuration.isPressed)
+    }
+}
+
+// MARK: - Scale press modifier (quick apply)
+
+struct ZXPressModifier: ViewModifier {
+    @State private var pressed = false
+
+    func body(content: Content) -> some View {
+        content
+            .scaleEffect(pressed ? 0.96 : 1.0)
+            .opacity(pressed ? 0.8 : 1.0)
+            .animation(.easeOut(duration: 0.12), value: pressed)
+            .simultaneousGesture(
+                DragGesture(minimumDistance: 0)
+                    .onChanged { _ in pressed = true }
+                    .onEnded { _ in pressed = false }
+            )
+            .sensoryFeedback(.impact(weight: .light), trigger: pressed)
+    }
+}
+
+extension View {
+    func zxPressable() -> some View {
+        modifier(ZXPressModifier())
+    }
+}
+
+// MARK: - Page transition modifier
+
+struct ZXPageTransition: ViewModifier {
+    let edge: Edge
+
+    func body(content: Content) -> some View {
+        content
+            .transition(
+                .move(edge: edge)
+                .combined(with: .opacity)
+            )
+    }
+}
+
+extension View {
+    func zxPageTransition(from edge: Edge = .trailing) -> some View {
+        modifier(ZXPageTransition(edge: edge))
+    }
+}
+
+// MARK: - AI Thinking overlay
+
+struct ZXThinkingOverlay: View {
+    let message: String
+
+    init(_ message: String = "AI 正在分析你的回答…") {
+        self.message = message
+    }
+
+    @State private var show = false
+
+    var body: some View {
+        ZStack {
+            Color.black.opacity(0.4).ignoresSafeArea()
+
+            VStack(spacing: 20) {
+                // Animated brain
+                ZStack {
+                    Circle()
+                        .fill(RadialGradient(
+                            colors: [Color(hex: "#7C6EFA", opacity: 0.3), .clear],
+                            center: .center, startRadius: 8, endRadius: 32
+                        ))
+                        .frame(width: 64, height: 64)
+                        .scaleEffect(show ? 1.3 : 0.8)
+                        .animation(.easeInOut(duration: 1.5).repeatForever(autoreverses: true), value: show)
+
+                    Image(systemName: "brain.head.profile")
+                        .font(.system(size: 28))
+                        .foregroundColor(.white.opacity(0.9))
+                }
+
+                VStack(spacing: 12) {
+                    Text(message)
+                        .font(.system(size: 15, weight: .semibold))
+                        .foregroundColor(.white)
+                    ZXDotLoader(color: .white)
+                }
+            }
+            .padding(32)
+            .background(
+                RoundedRectangle(cornerRadius: 24)
+                    .fill(.ultraThinMaterial)
+            )
+        }
+        .onAppear { show = true }
+    }
+}
+
+// MARK: - Celebration / Confetti effect
+
+struct ZXCelebrationView: View {
+    let title: String
+    let subtitle: String
+    let onDismiss: () -> Void
+
+    @State private var particles: [ConfettiParticle] = []
+    @State private var showContent = false
+
+    var body: some View {
+        ZStack {
+            Color.black.opacity(0.5).ignoresSafeArea()
+                .onTapGesture { dismiss() }
+
+            // Particles
+            ForEach(particles) { p in
+                Circle()
+                    .fill(p.color)
+                    .frame(width: p.size, height: p.size)
+                    .position(x: p.x, y: p.y)
+                    .opacity(p.opacity)
+                    .scaleEffect(p.scale)
+            }
+
+            // Content card
+            VStack(spacing: 20) {
+                ZStack {
+                    Circle()
+                        .fill(
+                            LinearGradient(
+                                colors: [Color(hex: "#7C6EFA"), Color(hex: "#F97316")],
+                                startPoint: .topLeading, endPoint: .bottomTrailing
+                            )
+                        )
+                        .frame(width: 80, height: 80)
+                    Image(systemName: "sparkles")
+                        .font(.system(size: 36))
+                        .foregroundColor(.white)
+                }
+                .scaleEffect(showContent ? 1 : 0.5)
+                .animation(.spring(response: 0.5, dampingFraction: 0.6).delay(0.2), value: showContent)
+
+                VStack(spacing: 6) {
+                    Text(title)
+                        .font(.system(size: 22, weight: .heavy))
+                        .foregroundColor(.white)
+                    Text(subtitle)
+                        .font(.system(size: 14))
+                        .foregroundColor(Color(hex: "#F0F0FF", opacity: 0.6))
+                }
+                .opacity(showContent ? 1 : 0)
+                .offset(y: showContent ? 0 : 20)
+
+                Button(action: dismiss) {
+                    Text("继续学习")
+                        .font(.system(size: 16, weight: .bold))
+                        .foregroundColor(.white)
+                        .frame(maxWidth: .infinity)
+                        .frame(height: 52)
+                        .background(
+                            LinearGradient(
+                                colors: [Color(hex: "#7C6EFA"), Color(hex: "#F97316")],
+                                startPoint: .topLeading, endPoint: .bottomTrailing
+                            )
+                        )
+                        .clipShape(RoundedRectangle(cornerRadius: 16))
+                }
+                .opacity(showContent ? 1 : 0)
+            }
+            .padding(28)
+            .background(
+                RoundedRectangle(cornerRadius: 24)
+                    .fill(.ultraThinMaterial)
+            )
+            .padding(.horizontal, 20)
+        }
+        .onAppear {
+            showContent = true
+            launchConfetti()
+        }
+    }
+
+    private func dismiss() {
+        withAnimation(.easeOut(duration: 0.25)) { showContent = false }
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
+            onDismiss()
+        }
+    }
+
+    private func launchConfetti() {
+        let colors: [Color] = [Color(hex: "#7C6EFA"), Color(hex: "#F97316"),
+                                Color(hex: "#A78BFA"), Color(hex: "#34D399"),
+                                Color(hex: "#F59E0B"), Color(hex: "#4ECDC4")]
+        var ps: [ConfettiParticle] = []
+        for i in 0..<60 {
+            let delay = Double(i) * 0.015
+            let x = CGFloat.random(in: 0...UIScreen.main.bounds.width)
+            let endY = CGFloat.random(in: 80...UIScreen.main.bounds.height * 0.7)
+            let size = CGFloat.random(in: 4...10)
+            let color = colors.randomElement()!
+            ps.append(ConfettiParticle(
+                id: UUID(), color: color, size: size,
+                x: x, y: -30, targetY: endY,
+                scale: 1, opacity: 1, delay: delay
+            ))
+        }
+        particles = ps
+
+        for p in particles {
+            withAnimation(.spring(response: 0.8, dampingFraction: 0.6).delay(p.delay)) {
+                if let idx = particles.firstIndex(where: { $0.id == p.id }) {
+                    particles[idx].y = p.targetY
+                    particles[idx].opacity = 0.4
+                    particles[idx].scale = 0.3
+                }
+            }
+        }
+    }
+}
+
+private struct ConfettiParticle: Identifiable {
+    let id: UUID
+    let color: Color
+    let size: CGFloat
+    var x: CGFloat
+    var y: CGFloat
+    let targetY: CGFloat
+    var scale: CGFloat
+    var opacity: Double
+    let delay: Double
+}
+
+// MARK: - AI Analysis progress view
+
+struct ZXAIAnalysisProgress: View {
+    let steps: [String]
+    @State private var currentStep = 0
+    @State private var progress: CGFloat = 0
+
+    var body: some View {
+        VStack(spacing: 24) {
+            ZStack {
+                ZXLoadingView(size: 48, lineWidth: 3)
+            }
+
+            VStack(spacing: 4) {
+                Text("AI 分析中…")
+                    .font(.system(size: 17, weight: .bold))
+                    .foregroundColor(Color.zxF0)
+                Text(steps[safe: currentStep] ?? steps.last ?? "")
+                    .font(.system(size: 13))
+                    .foregroundColor(Color.zxF04)
+            }
+
+            GeometryReader { g in
+                ZStack(alignment: .leading) {
+                    RoundedRectangle(cornerRadius: 3)
+                        .fill(Color.zxFill008)
+                        .frame(height: 6)
+                    RoundedRectangle(cornerRadius: 3)
+                        .fill(ZXGradient.progressBar)
+                        .frame(width: g.size.width * progress, height: 6)
+                        .animation(.easeInOut(duration: 0.6), value: progress)
+                }
+            }
+            .frame(height: 6)
+            .padding(.horizontal, 40)
+        }
+        .padding(28)
+        .background(
+            RoundedRectangle(cornerRadius: 20)
+                .fill(.ultraThinMaterial)
+        )
+        .padding(.horizontal, 40)
+        .onAppear {
+            var delay: TimeInterval = 0.8
+            for i in 0..<steps.count {
+                DispatchQueue.main.asyncAfter(deadline: .now() + delay) {
+                    currentStep = i
+                    progress = CGFloat(i + 1) / CGFloat(steps.count)
+                }
+                delay += 1.2
+            }
+        }
+    }
+}
+
+private extension Array {
+    subscript(safe index: Int) -> Element? {
+        indices.contains(index) ? self[index] : nil
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXLoadingView.swift b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXLoadingView.swift
new file mode 100644
index 0000000..455a3a2
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXLoadingView.swift
@@ -0,0 +1,135 @@
+import SwiftUI
+
+// MARK: - Branded loading spinner
+
+struct ZXLoadingView: View {
+    let size: CGFloat
+    let lineWidth: CGFloat
+
+    init(size: CGFloat = 36, lineWidth: CGFloat = 3) {
+        self.size = size
+        self.lineWidth = lineWidth
+    }
+
+    @State private var rotation: Double = 0
+
+    var body: some View {
+        ZStack {
+            // rotating gradient arc
+            Circle()
+                .trim(from: 0.05, to: 0.8)
+                .stroke(
+                    AngularGradient(
+                        colors: [Color(hex: "#7C6EFA"), Color(hex: "#A78BFA"), Color(hex: "#F97316"), Color(hex: "#7C6EFA")],
+                        center: .center,
+                        startAngle: .degrees(rotation),
+                        endAngle: .degrees(rotation + 300)
+                    ),
+                    style: StrokeStyle(lineWidth: lineWidth, lineCap: .round)
+                )
+                .frame(width: size, height: size)
+                .rotationEffect(.degrees(rotation))
+
+            // center dot
+            Circle()
+                .fill(Color(hex: "#7C6EFA", opacity: 0.3))
+                .frame(width: size * 0.3, height: size * 0.3)
+        }
+        .onAppear {
+            withAnimation(.linear(duration: 1.2).repeatForever(autoreverses: false)) {
+                rotation = 360
+            }
+        }
+    }
+}
+
+// MARK: - Full-screen loading overlay
+
+struct ZXLoadingOverlay: View {
+    let message: String?
+
+    init(_ message: String? = nil) {
+        self.message = message
+    }
+
+    var body: some View {
+        ZStack {
+            Color.black.opacity(0.35).ignoresSafeArea()
+            VStack(spacing: 16) {
+                ZXLoadingView(size: 44, lineWidth: 3.5)
+                if let message {
+                    Text(message)
+                        .font(.system(size: 14, weight: .medium))
+                        .foregroundColor(Color.zxF04)
+                }
+            }
+            .padding(28)
+            .background(
+                RoundedRectangle(cornerRadius: 20)
+                    .fill(.ultraThinMaterial)
+            )
+        }
+    }
+}
+
+// MARK: - Skeleton shimmer (for placeholder loading)
+
+struct ZXShimmer: ViewModifier {
+    @State private var phase: CGFloat = -0.5
+
+    func body(content: Content) -> some View {
+        content
+            .overlay(
+                LinearGradient(
+                    colors: [
+                        Color.white.opacity(0),
+                        Color.white.opacity(0.06),
+                        Color.white.opacity(0),
+                    ],
+                    startPoint: .leading,
+                    endPoint: .trailing
+                )
+                .rotationEffect(.degrees(15))
+                .scaleEffect(2)
+                .offset(x: phase * 400)
+                .animation(.linear(duration: 1.5).repeatForever(autoreverses: false), value: phase)
+            )
+            .clipped()
+            .onAppear { phase = 1.5 }
+    }
+}
+
+extension View {
+    func zxShimmer() -> some View {
+        modifier(ZXShimmer())
+    }
+}
+
+// MARK: - Staggered dot loader (for inline use, e.g. AI thinking)
+
+struct ZXDotLoader: View {
+    @State private var step = 0
+    let color: Color
+
+    init(color: Color = Color.zxPurple) {
+        self.color = color
+    }
+
+    var body: some View {
+        HStack(spacing: 6) {
+            ForEach(0..<3, id: \.self) { i in
+                Circle()
+                    .fill(color)
+                    .frame(width: 8, height: 8)
+                    .scaleEffect(step == i ? 1.2 : 0.7)
+                    .opacity(step == i ? 1 : 0.4)
+                    .animation(.easeInOut(duration: 0.4), value: step)
+            }
+        }
+        .onAppear {
+            Timer.scheduledTimer(withTimeInterval: 0.5, repeats: true) { timer in
+                step = (step + 1) % 3
+            }
+        }
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXRefreshableScrollView.swift b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXRefreshableScrollView.swift
new file mode 100644
index 0000000..a5da092
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXRefreshableScrollView.swift
@@ -0,0 +1,119 @@
+import SwiftUI
+
+// MARK: - Refreshable ScrollView with load-more
+
+struct ZXRefreshableScrollView<Content: View>: View {
+    let onRefresh: () async -> Void
+    let onLoadMore: (() async -> Void)?
+    let hasMore: Bool
+    let content: () -> Content
+
+    init(
+        onRefresh: @escaping () async -> Void,
+        onLoadMore: (() async -> Void)? = nil,
+        hasMore: Bool = false,
+        @ViewBuilder content: @escaping () -> Content
+    ) {
+        self.onRefresh = onRefresh
+        self.onLoadMore = onLoadMore
+        self.hasMore = hasMore
+        self.content = content
+    }
+
+    @State private var isRefreshing = false
+
+    var body: some View {
+        ScrollView {
+            // Pull-to-refresh anchor
+            if isRefreshing {
+                VStack(spacing: 8) {
+                    ZXLoadingView(size: 28, lineWidth: 2.5)
+                    Text("刷新中…")
+                        .font(.system(size: 12, weight: .medium))
+                        .foregroundColor(Color.zxF04)
+                }
+                .frame(maxWidth: .infinity)
+                .padding(.top, 8)
+                .padding(.bottom, 4)
+            }
+
+            content()
+
+            // Load-more footer
+            if let onLoadMore, hasMore {
+                ZXLoadMoreFooter(action: onLoadMore)
+            }
+        }
+        .scrollIndicators(.hidden)
+        .refreshable {
+            await onRefresh()
+        }
+    }
+}
+
+// MARK: - Load-more footer
+
+struct ZXLoadMoreFooter: View {
+    let action: () async -> Void
+
+    @State private var isLoading = false
+
+    var body: some View {
+        HStack(spacing: 10) {
+            if isLoading {
+                ZXLoadingView(size: 20, lineWidth: 2)
+                Text("加载中…")
+                    .font(.system(size: 13))
+                    .foregroundColor(Color.zxF04)
+            } else {
+                Text("上拉加载更多")
+                    .font(.system(size: 13))
+                    .foregroundColor(Color.zxF04)
+            }
+        }
+        .frame(maxWidth: .infinity)
+        .padding(.vertical, 20)
+        .padding(.bottom, 80)
+        .task {
+            isLoading = true
+            await action()
+            isLoading = false
+        }
+    }
+}
+
+// MARK: - Pull-to-refresh modifier (for plain ScrollView)
+
+struct ZXPullToRefreshModifier: ViewModifier {
+    let onRefresh: () async -> Void
+    @State private var isRefreshing = false
+
+    func body(content: Content) -> some View {
+        VStack(spacing: 0) {
+            if isRefreshing {
+                HStack(spacing: 10) {
+                    ZXLoadingView(size: 22, lineWidth: 2)
+                    Text("正在刷新…")
+                        .font(.system(size: 13, weight: .medium))
+                        .foregroundColor(Color.zxF04)
+                }
+                .frame(maxWidth: .infinity)
+                .padding(.vertical, 10)
+                .transition(.move(edge: .top).combined(with: .opacity))
+            }
+            content
+        }
+        .animation(.easeInOut(duration: 0.25), value: isRefreshing)
+        .refreshable {
+            isRefreshing = true
+            await onRefresh()
+            isRefreshing = false
+        }
+    }
+}
+
+extension View {
+    func zxPullToRefresh(_ action: @escaping () async -> Void) -> some View {
+        modifier(ZXPullToRefreshModifier(onRefresh: action))
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXToast.swift b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXToast.swift
new file mode 100644
index 0000000..1e7ab65
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Core/DesignSystem/ZXToast.swift
@@ -0,0 +1,153 @@
+import SwiftUI
+import Combine
+
+// MARK: - Toast type
+
+enum ZXToastType {
+    case success, error, warning, info
+
+    var icon: String {
+        switch self {
+        case .success: return "checkmark.circle.fill"
+        case .error:   return "xmark.circle.fill"
+        case .warning: return "exclamationmark.triangle.fill"
+        case .info:    return "info.circle.fill"
+        }
+    }
+
+    var color: Color {
+        switch self {
+        case .success: return Color.zxGreen
+        case .error:   return Color.zxRed
+        case .warning: return Color.zxOrange
+        case .info:    return Color.zxPurple
+        }
+    }
+}
+
+// MARK: - Global toast manager
+
+@MainActor
+final class ZXToastManager: ObservableObject {
+    static let shared = ZXToastManager()
+
+    @Published var current: ZXToastItem?
+
+    private var queue: [ZXToastItem] = []
+    private var hideTask: Task<Void, Never>?
+
+    private init() {}
+
+    func show(_ message: String, type: ZXToastType = .info, duration: TimeInterval = 2.5) {
+        let item = ZXToastItem(message: message, type: type)
+        if current != nil {
+            queue.append(item)
+            current = nil
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.35) { [weak self] in
+                self?.showNext()
+            }
+        } else {
+            withAnimation(.spring(response: 0.4, dampingFraction: 0.7)) {
+                current = item
+            }
+            scheduleHide(duration)
+        }
+    }
+
+    func success(_ message: String) { show(message, type: .success) }
+    func error(_ message: String)   { show(message, type: .error) }
+    func warning(_ message: String) { show(message, type: .warning) }
+    func info(_ message: String)    { show(message, type: .info) }
+
+    private func showNext() {
+        guard !queue.isEmpty else { return }
+        let next = queue.removeFirst()
+        withAnimation(.spring(response: 0.4, dampingFraction: 0.7)) {
+            current = next
+        }
+        scheduleHide(next.duration)
+    }
+
+    private func scheduleHide(_ duration: TimeInterval) {
+        hideTask?.cancel()
+        hideTask = Task {
+            try? await Task.sleep(nanoseconds: UInt64(duration * 1_000_000_000))
+            guard !Task.isCancelled else { return }
+            await MainActor.run {
+                withAnimation(.easeOut(duration: 0.25)) {
+                    current = nil
+                }
+            }
+            try? await Task.sleep(nanoseconds: 350_000_000)
+            showNext()
+        }
+    }
+}
+
+struct ZXToastItem: Equatable {
+    let id = UUID()
+    let message: String
+    let type: ZXToastType
+    let duration: TimeInterval
+
+    init(message: String, type: ZXToastType, duration: TimeInterval = 2.5) {
+        self.message = message
+        self.type = type
+        self.duration = duration
+    }
+
+    static func == (lhs: ZXToastItem, rhs: ZXToastItem) -> Bool { lhs.id == rhs.id }
+}
+
+// MARK: - Toast overlay modifier
+
+struct ZXToastOverlay: ViewModifier {
+    @ObservedObject private var manager = ZXToastManager.shared
+
+    func body(content: Content) -> some View {
+        content.overlay(alignment: .top) {
+            if let item = manager.current {
+                ZXToastBar(item: item)
+                    .padding(.horizontal, 20)
+                    .padding(.top, ZXSpacing.statusBarH + 8)
+                    .transition(.move(edge: .top).combined(with: .opacity))
+            }
+        }
+    }
+}
+
+extension View {
+    func zxToast() -> some View {
+        modifier(ZXToastOverlay())
+    }
+}
+
+// MARK: - Toast bar view
+
+struct ZXToastBar: View {
+    let item: ZXToastItem
+
+    var body: some View {
+        HStack(spacing: 10) {
+            Image(systemName: item.type.icon)
+                .font(.system(size: 16))
+                .foregroundColor(item.type.color)
+            Text(item.message)
+                .font(.system(size: 14, weight: .semibold))
+                .foregroundColor(Color.zxF0)
+                .lineLimit(2)
+            Spacer(minLength: 0)
+        }
+        .padding(.horizontal, 16)
+        .padding(.vertical, 14)
+        .background(
+            RoundedRectangle(cornerRadius: 16)
+                .fill(.ultraThinMaterial)
+                .overlay(
+                    RoundedRectangle(cornerRadius: 16)
+                        .stroke(item.type.color.opacity(0.2), lineWidth: 1)
+                )
+        )
+        .shadow(color: Color.black.opacity(0.25), radius: 12, y: 4)
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Core/Models/APIModels.swift b/AIStudyApp/AIStudyApp/Core/Models/APIModels.swift
index b45dcef..40fcb5d 100644
--- a/AIStudyApp/AIStudyApp/Core/Models/APIModels.swift
+++ b/AIStudyApp/AIStudyApp/Core/Models/APIModels.swift
@@ -124,7 +124,7 @@ struct UserProfileData: Codable {
     let currentGoal: String?
 }
 
-struct UserPreferences: Codable {
+struct UserPreferences: Codable, Equatable {
     let preferredMethods: [String]?
     let defaultFocusMinutes: Int?
     let aiSuggestionLevel: String?
diff --git a/AIStudyApp/AIStudyApp/Core/Security/FileCache.swift b/AIStudyApp/AIStudyApp/Core/Security/FileCache.swift
new file mode 100644
index 0000000..e44aaaa
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Core/Security/FileCache.swift
@@ -0,0 +1,43 @@
+import Foundation
+
+final class FileCache {
+    private let directory: URL
+    private let encoder = JSONEncoder()
+    private let decoder = JSONDecoder()
+
+    init(suite: String) {
+        let base = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first!
+        directory = base.appendingPathComponent("FileCache/\(suite)", isDirectory: true)
+        try? FileManager.default.createDirectory(at: directory, withIntermediateDirectories: true)
+    }
+
+    private func url(forKey key: String) -> URL {
+        directory.appendingPathComponent("\(key).json")
+    }
+
+    func save<T: Encodable>(_ value: T, forKey key: String) throws {
+        let data = try encoder.encode(value)
+        try data.write(to: url(forKey: key), options: .atomic)
+    }
+
+    func load<T: Decodable>(_ type: T.Type, forKey key: String) throws -> T? {
+        let fileURL = url(forKey: key)
+        guard FileManager.default.fileExists(atPath: fileURL.path) else { return nil }
+        let data = try Data(contentsOf: fileURL)
+        return try decoder.decode(T.self, from: data)
+    }
+
+    func remove(forKey key: String) throws {
+        let fileURL = url(forKey: key)
+        if FileManager.default.fileExists(atPath: fileURL.path) {
+            try FileManager.default.removeItem(at: fileURL)
+        }
+    }
+
+    func clear() throws {
+        if FileManager.default.fileExists(atPath: directory.path) {
+            try FileManager.default.removeItem(at: directory)
+        }
+        try FileManager.default.createDirectory(at: directory, withIntermediateDirectories: true)
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Core/Security/LocalCache.swift b/AIStudyApp/AIStudyApp/Core/Security/LocalCache.swift
new file mode 100644
index 0000000..674f05e
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Core/Security/LocalCache.swift
@@ -0,0 +1,92 @@
+import Foundation
+
+/// Lightweight offline cache wrapper: memory → disk → network fallback.
+/// Uses UserDefaults for small values, FileCache for larger blobs.
+@MainActor
+final class LocalCache {
+    static let shared = LocalCache()
+
+    private let defaults = UserDefaults.standard
+    private let fileCache = FileCache(suite: "local_cache")
+
+    private init() {}
+
+    // MARK: - Simple values (UserDefaults)
+
+    func get<T>(_ key: String) -> T? where T: Decodable {
+        // Try memory/disk via FileCache first, then UserDefaults
+        if let cached: T = try? fileCache.load(T.self, forKey: key) {
+            return cached
+        }
+        return nil
+    }
+
+    func set<T>(_ value: T, forKey key: String) where T: Encodable {
+        try? fileCache.save(value, forKey: key)
+    }
+
+    func remove(_ key: String) {
+        try? fileCache.remove(forKey: key)
+    }
+
+    // MARK: - Array caching (common pattern)
+
+    func getList<T: Decodable>(_ key: String) -> [T] {
+        (try? fileCache.load([T].self, forKey: key)) ?? []
+    }
+
+    func setList<T: Encodable>(_ items: [T], forKey key: String) {
+        try? fileCache.save(items, forKey: key)
+    }
+
+    // MARK: - Expiry-based caching
+
+    func getWithExpiry<T: Decodable>(_ key: String, ttl: TimeInterval = 300) -> T? {
+        let expiryKey = "\(key)_expiry"
+        let expiry = defaults.double(forKey: expiryKey)
+        guard expiry == 0 || Date().timeIntervalSince1970 < expiry else {
+            remove(key)
+            defaults.removeObject(forKey: expiryKey)
+            return nil
+        }
+        return get(key)
+    }
+
+    func setWithExpiry<T: Encodable>(_ value: T, forKey key: String, ttl: TimeInterval = 300) {
+        set(value, forKey: key)
+        defaults.set(Date().timeIntervalSince1970 + ttl, forKey: "\(key)_expiry")
+    }
+
+    func clearAll() {
+        try? fileCache.clear()
+    }
+}
+
+// MARK: - ViewModel caching helper
+
+extension LocalCache {
+    /// Wrap an API fetch with cache-first strategy.
+    /// Returns cached data instantly, then refreshes in background.
+    func cacheFirst<T: Codable>(
+        key: String,
+        ttl: TimeInterval = 300,
+        fetch: @Sendable () async throws -> T
+    ) async throws -> T {
+        if let cached: T = getWithExpiry(key, ttl: ttl) {
+            Task { try? await refreshCache(key: key, ttl: ttl, fetch: fetch) }
+            return cached
+        }
+        let fresh = try await fetch()
+        setWithExpiry(fresh, forKey: key, ttl: ttl)
+        return fresh
+    }
+
+    private func refreshCache<T: Codable>(
+        key: String,
+        ttl: TimeInterval,
+        fetch: @Sendable () async throws -> T
+    ) async throws {
+        let fresh = try await fetch()
+        setWithExpiry(fresh, forKey: key, ttl: ttl)
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Features/AI/AIChatViewModel.swift b/AIStudyApp/AIStudyApp/Features/AI/AIChatViewModel.swift
new file mode 100644
index 0000000..d2f41dd
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Features/AI/AIChatViewModel.swift
@@ -0,0 +1,42 @@
+import Combine
+import Foundation
+
+struct AIMessage: Identifiable {
+    let id = UUID()
+    let role: AIMessageRole
+    let content: String
+}
+
+enum AIMessageRole {
+    case user, ai
+}
+
+@MainActor
+final class AIChatViewModel: ObservableObject {
+    @Published var messages: [AIMessage] = [
+        AIMessage(role: .ai, content: "你好！我是你的 AI 学习助手。")
+    ]
+    @Published var inputText = ""
+    @Published var isSending = false
+
+    var canSend: Bool {
+        !inputText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty && !isSending
+    }
+
+    func send() {
+        guard canSend else { return }
+        let text = inputText.trimmingCharacters(in: .whitespacesAndNewlines)
+        messages.append(AIMessage(role: .user, content: text))
+        inputText = ""
+        isSending = true
+
+        Task {
+            try? await Task.sleep(nanoseconds: 1_200_000_000)
+            messages.append(AIMessage(
+                role: .ai,
+                content: "好的，我理解你的问题。需要我帮你制定学习计划吗？"
+            ))
+            isSending = false
+        }
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Features/AI/AIHomeView.swift b/AIStudyApp/AIStudyApp/Features/AI/AIHomeView.swift
index d1aa7ed..8d255fe 100644
--- a/AIStudyApp/AIStudyApp/Features/AI/AIHomeView.swift
+++ b/AIStudyApp/AIStudyApp/Features/AI/AIHomeView.swift
@@ -96,6 +96,8 @@ struct AIHomeView: View {
                     .frame(maxWidth:.infinity).frame(height:42)
                     .background(ZXGradient.brand).clipShape(RoundedRectangle(cornerRadius:12))
             }
+            .accessibilityLabel("开始回答今日思考题")
+            .accessibilityHint("用费曼方法解释注意力机制")
         }
         .padding(16).background(ZXGradient.thinkingCard)
         .overlay(RoundedRectangle(cornerRadius:20).stroke(Color(hex:"#7C6EFA",opacity:0.1),lineWidth:1))
@@ -165,6 +167,7 @@ struct AIHomeView: View {
                 Image(systemName:"arrow.up").font(.system(size:14,weight:.bold)).foregroundColor(.white)
                     .frame(width:30,height:30).background(ZXGradient.brand).clipShape(RoundedRectangle(cornerRadius:9))
             }
+            .accessibilityLabel("发送消息，开始 AI 对话")
         }
         .padding(.horizontal,14).padding(.vertical,10)
         .background(.ultraThinMaterial).background(Color.zxFill004)
@@ -187,6 +190,7 @@ struct ZXQuickAction: View {
         }
         .frame(width:72,height:72)
         .background(Color.zxFill005).clipShape(RoundedRectangle(cornerRadius:16))
+        .accessibilityLabel(label.replacingOccurrences(of: "\n", with: ""))
     }
 }
 
diff --git a/AIStudyApp/AIStudyApp/Features/AI/ActiveRecallView.swift b/AIStudyApp/AIStudyApp/Features/AI/ActiveRecallView.swift
index 7fcebb9..42151c0 100644
--- a/AIStudyApp/AIStudyApp/Features/AI/ActiveRecallView.swift
+++ b/AIStudyApp/AIStudyApp/Features/AI/ActiveRecallView.swift
@@ -13,6 +13,8 @@ struct ActiveRecallView: View {
     @State private var currentAnswer = ""
     @State private var submitted: Set<String> = []
     @State private var showFinish = false
+    @State private var showThinking = false
+    @State private var showCelebration = false
 
     var current: RecallQuestion { questions[idx] }
 
@@ -40,6 +42,18 @@ struct ActiveRecallView: View {
         .navigationBarTitleDisplayMode(.inline)
         .toolbarBackground(.hidden, for: .navigationBar)
         .task { await viewModel.loadQuestions() }
+        .overlay {
+            if showThinking {
+                ZXThinkingOverlay("AI 正在分析你的回答…")
+            }
+        }
+        .overlay {
+            if showCelebration {
+                ZXCelebrationView(title: "回忆完成", subtitle: "你已完成所有主动回忆题目，AI 分析结果已生成") {
+                    withAnimation(.easeOut(duration: 0.3)) { showCelebration = false }
+                }
+            }
+        }
     }
 
     private var isSubmitted: Bool { submitted.contains(current.id) }
@@ -91,6 +105,9 @@ struct ActiveRecallView: View {
         .background(ZXGradient.thinkingCard)
         .overlay(RoundedRectangle(cornerRadius: 16).stroke(Color.zxBorder006, lineWidth: 1))
         .clipShape(RoundedRectangle(cornerRadius: 16))
+        .accessibilityElement(children: .combine)
+        .accessibilityLabel("问题 \(idx + 1)：\(current.question)")
+        .accessibilityHint(current.isVoice ? "语音题，双击录音回答" : "文字题，在下方输入回答")
     }
 
     private var answerInput: some View {
@@ -116,6 +133,13 @@ struct ActiveRecallView: View {
                 answers[current.id] = current.isVoice ? "语音答案已录制" : currentAnswer
                 submitted.insert(current.id)
                 currentAnswer = ""
+                if submitted.count == questions.count {
+                    showThinking = true
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
+                        showThinking = false
+                        showCelebration = true
+                    }
+                }
             } label: {
                 Text("提交回答")
                     .font(.system(size: 14, weight: .bold))
@@ -124,8 +148,11 @@ struct ActiveRecallView: View {
                     .background(ZXGradient.ctaPurple)
                     .clipShape(RoundedRectangle(cornerRadius: 16))
             }
+            .zxPressable()
             .disabled(currentAnswer.isEmpty && !current.isVoice)
             .opacity(currentAnswer.isEmpty && !current.isVoice ? 0.5 : 1)
+            .accessibilityLabel("提交回答")
+            .accessibilityHint("提交后可由 AI 分析你的回答质量")
         }
     }
 
@@ -168,8 +195,11 @@ struct ActiveRecallView: View {
                         .background(ZXGradient.brand)
                         .clipShape(RoundedRectangle(cornerRadius: 16))
                 }
+                .zxPressable()
             } else {
-                NavigationLink(destination: AIFeedbackPageView()) {
+                Button {
+                    showCelebration = true
+                } label: {
                     Label("查看 AI 分析结果", systemImage: "sparkles")
                         .font(.system(size: 14, weight: .bold))
                         .foregroundColor(.white)
@@ -177,6 +207,7 @@ struct ActiveRecallView: View {
                         .background(ZXGradient.ctaPurple)
                         .clipShape(RoundedRectangle(cornerRadius: 16))
                 }
+                .zxPressable()
             }
         }
     }
diff --git a/AIStudyApp/AIStudyApp/Features/AI/DailyThinkingPage.swift b/AIStudyApp/AIStudyApp/Features/AI/DailyThinkingPage.swift
index 8976eb2..f369a1a 100644
--- a/AIStudyApp/AIStudyApp/Features/AI/DailyThinkingPage.swift
+++ b/AIStudyApp/AIStudyApp/Features/AI/DailyThinkingPage.swift
@@ -10,7 +10,7 @@ struct DailyThinkingPage: View {
                     Text("AI会从三个方面评估你的回答：核心概念理解 · 理论深度 · 实际应用能力").font(.system(size:12)).foregroundColor(Color.zxF04)
                 }.padding(16).background(ZXGradient.thinkingCard).clipShape(RoundedRectangle(cornerRadius:16))
                 VStack(alignment:.leading,spacing:8){Text("你的回答").font(.system(size:13,weight:.semibold)).foregroundColor(Color.zxF04);TextEditor(text:$answer).font(.system(size:13)).foregroundColor(Color.zxF0).tint(Color.zxPurple).frame(minHeight:160).scrollContentBackground(.hidden).padding(12).background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius:14)).overlay(RoundedRectangle(cornerRadius:14).stroke(Color.zxBorder008,lineWidth:1))}
-                if !submitted{ NavigationLink(destination:AIFeedbackPageView()){ Text("提交回答，获取 AI 反馈").font(.system(size:14,weight:.bold)).foregroundColor(.white).frame(maxWidth:.infinity).frame(height:52).background(ZXGradient.ctaPurple).clipShape(RoundedRectangle(cornerRadius:16)).shadow(color:Color(hex:"#7C6EFA",opacity:0.3),radius:24) } }
+                if !submitted{ NavigationLink(destination:AIFeedbackPageView()){ Text("提交回答，获取 AI 反馈").font(.system(size:14,weight:.bold)).foregroundColor(.white).frame(maxWidth:.infinity).frame(height:52).background(ZXGradient.ctaPurple).clipShape(RoundedRectangle(cornerRadius:16)).shadow(color:Color(hex:"#7C6EFA",opacity:0.3),radius:24) }.zxPressable() }
             }.padding(.horizontal,20).padding(.top, 8).padding(.bottom,120) }.scrollIndicators(.hidden)
         }.navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden,for:.navigationBar)
     }
@@ -25,22 +25,171 @@ struct WeakPointsPage: View { var body: some View { ZStack{Color.zxBg0.ignoresSa
 }.padding(.horizontal,20).padding(.top, 8).padding(.bottom,80)}.scrollIndicators(.hidden)}.navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden,for:.navigationBar)} }
 struct AIFeedbackPageView: View {
     @State private var navigateToChat = false
+    @State private var isAnalyzing = true
+
     var body: some View {
-        ZStack{Color.zxBg0.ignoresSafeArea();ScrollView{VStack(spacing:16){ HStack(spacing:20){ ZStack{Circle().trim(from:0,to:0.78).stroke(ZXGradient.brand,style:StrokeStyle(lineWidth:10,lineCap:.round)).rotationEffect(.degrees(-90)).frame(width:80,height:80);VStack(spacing:0){Text("78").font(.system(size:22,weight:.heavy)).foregroundColor(Color.zxPurple);Text("/ 100").font(.system(size:9)).foregroundColor(Color.zxF04)}};VStack(alignment:.leading,spacing:2){Text("良好掌握").font(.system(size:18,weight:.heavy)).foregroundColor(Color.zxF0);Text("理解核心概念，但缺少理论深度和解决方案").font(.system(size:12)).foregroundColor(Color.zxF0045).lineSpacing(4)};Spacer() }.padding(20).background(ZXGradient.feedbackScore).clipShape(RoundedRectangle(cornerRadius:20)).overlay(RoundedRectangle(cornerRadius:20).stroke(Color(hex:"#7C6EFA",opacity:0.2),lineWidth:1))
-        VStack(alignment:.leading,spacing:8){Text("你的回答").font(.system(size:13,weight:.semibold)).foregroundColor(Color.zxF04);Text("过拟合就像一个学生只会「死记硬背」考题，而不是真正理解知识…").font(.system(size:13)).foregroundColor(Color.zxF007).lineSpacing(6).padding(14).background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius:14)).overlay(RoundedRectangle(cornerRadius:14).stroke(Color.zxBorder006,lineWidth:1))}
-        VStack(alignment:.leading,spacing:8){HStack(spacing:8){Image(systemName:"checkmark.circle.fill").foregroundColor(Color.zxGreen);Text("答对的部分").font(.system(size:14,weight:.bold)).foregroundColor(Color.zxF0)};ForEach(["正确识别出过拟合是\"记住训练数据\"而非\"学习规律\"","使用了死记硬背类比，方向正确且贴切"],id:\.self){s in HStack(alignment:.top,spacing:12){Circle().fill(Color.zxGreen).frame(width:6,height:6).padding(.top,6);Text(s).font(.system(size:13)).foregroundColor(Color(hex:"#F0F0FF",opacity:0.75)).lineSpacing(4)}.padding(12).background(Color(hex:"#34D399",opacity:0.07)).clipShape(RoundedRectangle(cornerRadius:12)).overlay(RoundedRectangle(cornerRadius:12).stroke(Color(hex:"#34D399",opacity:0.18),lineWidth:1))}}
-        NavigationLink(destination: StudyHomeView()) {
-            Label("加入待巩固，安排间隔复习",systemImage:"bolt.fill").font(.system(size:14,weight:.bold)).foregroundColor(.white).frame(maxWidth:.infinity).frame(height:52).background(ZXGradient.ctaPurple).clipShape(RoundedRectangle(cornerRadius:16)).shadow(color:Color(hex:"#7C6EFA",opacity:0.3),radius:24)
-        }
-        HStack(spacing:12){
-            NavigationLink(destination: AIChatPage()) {
-                HStack(spacing:4){Text("深入提问").font(.system(size:13));Image(systemName:"chevron.right").font(.system(size:14))}.foregroundColor(Color.zxF05).frame(maxWidth:.infinity).frame(height:44).background(Color.zxFill005).clipShape(RoundedRectangle(cornerRadius:14)).overlay(RoundedRectangle(cornerRadius:14).stroke(Color.zxBorder008,lineWidth:1))
-            }
-            NavigationLink(destination: DailyThinkingPage()) {
-                HStack(spacing:4){Text("再来一题").font(.system(size:13));Image(systemName:"chevron.right").font(.system(size:14))}.foregroundColor(Color.zxF05).frame(maxWidth:.infinity).frame(height:44).background(Color.zxFill005).clipShape(RoundedRectangle(cornerRadius:14)).overlay(RoundedRectangle(cornerRadius:14).stroke(Color.zxBorder008,lineWidth:1))
+        ZStack {
+            Color.zxBg0.ignoresSafeArea()
+            if isAnalyzing {
+                ZXAIAnalysisProgress(steps: [
+                    "解析你的回答结构…",
+                    "对比知识库标准答案…",
+                    "评估概念理解深度…",
+                    "生成个性化反馈…"
+                ])
+                .onAppear {
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 5.0) {
+                        withAnimation(.easeOut(duration: 0.4)) { isAnalyzing = false }
+                    }
+                }
+            } else {
+                ScrollView {
+                    VStack(spacing: 16) {
+                        HStack(spacing: 20) {
+                            ZStack {
+                                Circle().trim(from: 0, to: 0.78).stroke(ZXGradient.brand, style: StrokeStyle(lineWidth: 10, lineCap: .round)).rotationEffect(.degrees(-90)).frame(width: 80, height: 80)
+                                VStack(spacing: 0) {
+                                    Text("78").font(.system(size: 22, weight: .heavy)).foregroundColor(Color.zxPurple)
+                                    Text("/ 100").font(.system(size: 9)).foregroundColor(Color.zxF04)
+                                }
+                            }
+                            VStack(alignment: .leading, spacing: 2) {
+                                Text("良好掌握").font(.system(size: 18, weight: .heavy)).foregroundColor(Color.zxF0)
+                                Text("理解核心概念，但缺少理论深度和解决方案").font(.system(size: 12)).foregroundColor(Color.zxF0045).lineSpacing(4)
+                            }
+                            Spacer()
+                        }
+                        .padding(20)
+                        .background(ZXGradient.feedbackScore)
+                        .clipShape(RoundedRectangle(cornerRadius: 20))
+                        .overlay(RoundedRectangle(cornerRadius: 20).stroke(Color(hex: "#7C6EFA", opacity: 0.2), lineWidth: 1))
+
+                        VStack(alignment: .leading, spacing: 8) {
+                            Text("你的回答").font(.system(size: 13, weight: .semibold)).foregroundColor(Color.zxF04)
+                            Text("过拟合就像一个学生只会「死记硬背」考题，而不是真正理解知识…").font(.system(size: 13)).foregroundColor(Color.zxF007).lineSpacing(6).padding(14).background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 14)).overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder006, lineWidth: 1))
+                        }
+                        VStack(alignment: .leading, spacing: 8) {
+                            HStack(spacing: 8) {
+                                Image(systemName: "checkmark.circle.fill").foregroundColor(Color.zxGreen)
+                                Text("答对的部分").font(.system(size: 14, weight: .bold)).foregroundColor(Color.zxF0)
+                            }
+                            ForEach(["正确识别出过拟合是\"记住训练数据\"而非\"学习规律\"", "使用了死记硬背类比，方向正确且贴切"], id: \.self) { s in
+                                HStack(alignment: .top, spacing: 12) {
+                                    Circle().fill(Color.zxGreen).frame(width: 6, height: 6).padding(.top, 6)
+                                    Text(s).font(.system(size: 13)).foregroundColor(Color(hex: "#F0F0FF", opacity: 0.75)).lineSpacing(4)
+                                }
+                                .padding(12)
+                                .background(Color(hex: "#34D399", opacity: 0.07))
+                                .clipShape(RoundedRectangle(cornerRadius: 12))
+                                .overlay(RoundedRectangle(cornerRadius: 12).stroke(Color(hex: "#34D399", opacity: 0.18), lineWidth: 1))
+                            }
+                        }
+                        NavigationLink(destination: StudyHomeView()) {
+                            Label("加入待巩固，安排间隔复习", systemImage: "bolt.fill")
+                                .font(.system(size: 14, weight: .bold))
+                                .foregroundColor(.white)
+                                .frame(maxWidth: .infinity).frame(height: 52)
+                                .background(ZXGradient.ctaPurple)
+                                .clipShape(RoundedRectangle(cornerRadius: 16))
+                                .shadow(color: Color(hex: "#7C6EFA", opacity: 0.3), radius: 24)
+                        }
+                        HStack(spacing: 12) {
+                            NavigationLink(destination: AIChatPage()) {
+                                HStack(spacing: 4) {
+                                    Text("深入提问").font(.system(size: 13))
+                                    Image(systemName: "chevron.right").font(.system(size: 14))
+                                }
+                                .foregroundColor(Color.zxF05)
+                                .frame(maxWidth: .infinity).frame(height: 44)
+                                .background(Color.zxFill005)
+                                .clipShape(RoundedRectangle(cornerRadius: 14))
+                                .overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1))
+                            }
+                            NavigationLink(destination: DailyThinkingPage()) {
+                                HStack(spacing: 4) {
+                                    Text("再来一题").font(.system(size: 13))
+                                    Image(systemName: "chevron.right").font(.system(size: 14))
+                                }
+                                .foregroundColor(Color.zxF05)
+                                .frame(maxWidth: .infinity).frame(height: 44)
+                                .background(Color.zxFill005)
+                                .clipShape(RoundedRectangle(cornerRadius: 14))
+                                .overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1))
+                            }
+                        }
+                    }
+                    .padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 80)
+                }
+                .scrollIndicators(.hidden)
+                .transition(.opacity.combined(with: .scale(scale: 0.95)))
             }
         }
-        }.padding(.horizontal,20).padding(.top, 8).padding(.bottom,80)}.scrollIndicators(.hidden)}.navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden,for:.navigationBar)
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbarBackground(.hidden, for: .navigationBar)
+    }
+}
+// MARK: - AI Chat
+
+struct AIChatPage: View {
+    @StateObject private var vm = AIChatViewModel()
+
+    var body: some View {
+        ZStack {
+            Color.zxBg0.ignoresSafeArea()
+            VStack(spacing: 0) {
+                ScrollViewReader { proxy in
+                    ScrollView {
+                        VStack(spacing: 16) {
+                            ForEach(vm.messages) { m in
+                                chatBubble(m)
+                                    .id(m.id)
+                            }
+                            if vm.isSending {
+                                HStack(spacing: 8) {
+                                    Image(systemName: "brain.head.profile").foregroundColor(Color.zxPurple)
+                                        .frame(width: 28, height: 28)
+                                        .background(Color(hex: "#7C6EFA", opacity: 0.15))
+                                        .clipShape(Circle())
+                                    ZXDotLoader(color: Color.zxPurple)
+                                        .padding(.leading, 4)
+                                    Spacer()
+                                }
+                                .padding(.horizontal, 20)
+                            }
+                        }
+                        .padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 100)
+                    }
+                    .scrollIndicators(.hidden)
+                    .onChange(of: vm.messages.count) { _ in
+                        withAnimation { proxy.scrollTo(vm.messages.last?.id) }
+                    }
+                }
+                ZXAIInputBar(text: $vm.inputText, onSend: { vm.send() })
+            }
+        }
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbarBackground(.hidden, for: .navigationBar)
+    }
+
+    private func chatBubble(_ m: AIMessage) -> some View {
+        HStack(alignment: .top, spacing: 8) {
+            if m.role == .ai {
+                Image(systemName: "brain.head.profile").foregroundColor(Color.zxPurple)
+                    .frame(width: 28, height: 28)
+                    .background(Color(hex: "#7C6EFA", opacity: 0.15))
+                    .clipShape(Circle())
+            }
+            Text(m.content).font(.system(size: 14))
+                .foregroundColor(m.role == .user ? .white : Color.zxF007)
+                .padding(12)
+                .background(m.role == .user ? AnyView(ZXGradient.brandPurple) : AnyView(Color.zxFill004))
+                .clipShape(RoundedRectangle(cornerRadius: 16))
+            if m.role == .user {
+                Circle().frame(width: 28, height: 28)
+                    .foregroundColor(Color.zxPurpleBG(0.2))
+                    .overlay(Text("我").font(.system(size: 10, weight: .bold)).foregroundColor(Color.zxPurple))
+            }
+        }
+        .frame(maxWidth: .infinity, alignment: m.role == .user ? .trailing : .leading)
     }
 }
-struct AIChatPage: View { @State private var msg="";@State private var msgs:[(String,String)]=[("ai","你好！我是你的 AI 学习助手。")]; var body: some View { ZStack{Color.zxBg0.ignoresSafeArea();VStack(spacing:0){ScrollViewReader{proxy in ScrollView{VStack(spacing:16){ForEach(Array(msgs.enumerated()),id:\.offset){i,m in HStack(alignment:.top,spacing:8){if m.0=="ai"{Image(systemName:"brain.head.profile").foregroundColor(Color.zxPurple).frame(width:28,height:28).background(Color(hex:"#7C6EFA",opacity:0.15)).clipShape(Circle())};Text(m.1).font(.system(size:14)).foregroundColor(m.0=="user" ? .white:Color.zxF007).padding(12).background(m.0=="user" ? AnyView(ZXGradient.brandPurple):AnyView(Color.zxFill004)).clipShape(RoundedRectangle(cornerRadius:16));if m.0=="user"{Circle().frame(width:28,height:28).foregroundColor(Color.zxPurpleBG(0.2)).overlay(Text("我").font(.system(size:10,weight:.bold)).foregroundColor(Color.zxPurple))}}.frame(maxWidth:.infinity,alignment:m.0=="user" ? .trailing:.leading)}}.padding(.horizontal,20).padding(.top, 8).padding(.bottom,100).id("bottom")}.scrollIndicators(.hidden).onChange(of:msgs.count){withAnimation{proxy.scrollTo("bottom")}}};ZXAIInputBar(text:$msg,onSend:{guard !msg.isEmpty else{return};msgs.append(("user",msg));msg="";DispatchQueue.main.asyncAfter(deadline:.now()+1){msgs.append(("ai","好的，我理解你的问题。需要我帮你制定学习计划吗？"))}})}}.navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden,for:.navigationBar)} }
diff --git a/AIStudyApp/AIStudyApp/Features/Analysis/ActivityViewModel.swift b/AIStudyApp/AIStudyApp/Features/Analysis/ActivityViewModel.swift
index e0b48e6..97c1101 100644
--- a/AIStudyApp/AIStudyApp/Features/Analysis/ActivityViewModel.swift
+++ b/AIStudyApp/AIStudyApp/Features/Analysis/ActivityViewModel.swift
@@ -9,40 +9,32 @@ class ActivityViewModel: ObservableObject {
     @Published var isLoading = false
     @Published var errorMessage: String?
 
-    func loadSummary() async {
-        isLoading = true
-        errorMessage = nil
-        do {
-            summary = try await ActivityService.shared.summary()
-        } catch {
-            errorMessage = "加载学习统计失败"
-        }
-        isLoading = false
-    }
-
-    func loadFocusItems() async {
-        do {
-            focusItems = try await FocusItemService.shared.list()
-        } catch {
-            errorMessage = "加载弱项列表失败"
-        }
-    }
-
-    func loadHeatmap() async {
-        do {
-            heatmap = try await ActivityService.shared.heatmap()
-        } catch {
-            // heatmap is non-critical, silently fail
-        }
-    }
-
     func loadAll() async {
         isLoading = true
         errorMessage = nil
-        async let summaryTask: () = loadSummary()
-        async let focusTask: () = loadFocusItems()
-        async let heatmapTask: () = loadHeatmap()
-        _ = await (summaryTask, focusTask, heatmapTask)
+        do {
+            async let s = ActivityService.shared.summary()
+            async let f = FocusItemService.shared.list()
+            async let h = ActivityService.shared.heatmap()
+            let (summaryResult, focusResult, heatmapResult) = try await (s, f, h)
+            summary = summaryResult
+            focusItems = focusResult
+            heatmap = heatmapResult
+        } catch {
+            if summary == nil { errorMessage = "加载分析数据失败" }
+        }
         isLoading = false
     }
+
+    func refresh() async {
+        do {
+            async let s = ActivityService.shared.summary()
+            async let f = FocusItemService.shared.list()
+            async let h = ActivityService.shared.heatmap()
+            let (summaryResult, focusResult, heatmapResult) = try await (s, f, h)
+            summary = summaryResult
+            focusItems = focusResult
+            heatmap = heatmapResult
+        } catch {}
+    }
 }
diff --git a/AIStudyApp/AIStudyApp/Features/Analysis/AnalysisHomeView.swift b/AIStudyApp/AIStudyApp/Features/Analysis/AnalysisHomeView.swift
index 24cab44..bc37fcf 100644
--- a/AIStudyApp/AIStudyApp/Features/Analysis/AnalysisHomeView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Analysis/AnalysisHomeView.swift
@@ -15,6 +15,10 @@ struct AnalysisHomeView: View {
                 .padding(.horizontal, 20).padding(.top, ZXSpacing.statusBarH + 16).padding(.bottom, 12)
                 ScrollView {
                     VStack(spacing: 16) {
+                        if viewModel.isLoading && viewModel.summary == nil {
+                            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)
+                        }
                         HStack(spacing: 12) {
                             ZXStatBadge(icon: "trophy.fill", label: "综合掌握", value: "\(viewModel.summary?.dailyAverage ?? 0)%", trend: "", color: Color.zxPurple)
                             ZXStatBadge(icon: "bolt.fill", label: "总分钟", value: "\(viewModel.summary?.totalMinutes ?? 0)", trend: "", color: Color.zxOrange)
@@ -26,7 +30,7 @@ struct AnalysisHomeView: View {
                             ZXChartView()
                         }.padding(16).background(Color.zxFill004).overlay(RoundedRectangle(cornerRadius: 20).stroke(Color.zxBorder006, lineWidth: 1)).clipShape(RoundedRectangle(cornerRadius: 20))
                         VStack(alignment: .leading, spacing: 12) {
-                            HStack { HStack(spacing: 8) { Image(systemName: "exclamationmark.triangle.fill").font(.system(size: 14)).foregroundColor(Color.zxYellow); Text("薄弱知识点").font(.system(size: 15, weight: .bold)).foregroundColor(Color.zxF0) }; Spacer(); NavigationLink(destination: WeakPointsPage()) { Text("全部 \(viewModel.focusItems.count) 个").font(.system(size: 12)).foregroundColor(Color.zxPurple) } }
+                            HStack { HStack(spacing: 8) { Image(systemName: "exclamationmark.triangle.fill").font(.system(size: 14)).foregroundColor(Color.zxYellow); Text("薄弱知识点").font(.system(size: 15, weight: .bold)).foregroundColor(Color.zxF0) }; Spacer(); NavigationLink(destination: WeakPointsPage()) { Text("全部 \(viewModel.focusItems.count) 个").font(.system(size: 12)).foregroundColor(Color.zxPurple) }.accessibilityLabel("查看全部薄弱知识点") }
                             ForEach(viewModel.focusItems.prefix(5)) { item in
                                 ZXWeakRow(score: item.masteryScore ?? 0, topic: item.title, lib: item.knowledgeBaseId ?? "", priority: item.priority ?? "normal")
                             }
@@ -35,7 +39,9 @@ struct AnalysisHomeView: View {
                             }
                         }
                     }.padding(.horizontal, 20).padding(.bottom, 120)
-                }.scrollIndicators(.hidden)
+                }
+                .scrollIndicators(.hidden)
+                .zxPullToRefresh { await viewModel.refresh() }
             }
         }
         .task { await viewModel.loadAll() }
diff --git a/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift b/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift
index edff226..da19a4e 100644
--- a/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift
@@ -17,16 +17,23 @@ struct LibraryHomeView: View {
                             .clipShape(RoundedRectangle(cornerRadius: 10))
                             .overlay(RoundedRectangle(cornerRadius: 10).stroke(Color.zxBorder008, lineWidth: 1))
                     }
+                    .accessibilityLabel("搜索知识库")
                     NavigationLink(destination: ImportPage()) {
                         Image(systemName: "plus").font(.system(size: 18)).foregroundColor(.white)
                             .frame(width: 36, height: 36).background(ZXGradient.brand)
                             .clipShape(RoundedRectangle(cornerRadius: 10))
                     }
+                    .accessibilityLabel("导入新知识库")
                 }
                     .padding(.horizontal, 20).padding(.top, ZXSpacing.statusBarH + 16).padding(.bottom, 12)
-                HStack(spacing: 8) { Image(systemName: "magnifyingglass").font(.system(size: 16)).foregroundColor(Color.zxF03); TextField("搜索知识库或知识点…", text: $s).font(.system(size: 14)).tint(Color.zxPurple) }
+                HStack(spacing: 8) { Image(systemName: "magnifyingglass").font(.system(size: 16)).foregroundColor(Color.zxF03); TextField("搜索知识库或知识点…", text: $s).font(.system(size: 14)).tint(Color.zxPurple).accessibilityLabel("搜索知识库") }
                     .padding(.horizontal, 14).frame(height: 44).background(Color.zxFill004).overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1)).clipShape(RoundedRectangle(cornerRadius: 14)).padding(.horizontal, 20).padding(.bottom, 16)
+                    .accessibilityHint("输入关键词搜索知识库或知识点")
                 ScrollView { VStack(spacing: 12) {
+                    if viewModel.isLoading && viewModel.knowledgeBases.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)
+                    }
                     ForEach(viewModel.knowledgeBases) { kb in
                         NavigationLink(destination: LibraryDetailPage(knowledgeBaseId: kb.id)) {
                             ZLibraryCard(emoji: "📚", name: kb.title, desc: kb.description ?? "", color: Color.zxPurple, items: kb.itemCount ?? 0, mastery: 50, tags: [], last: lastStudiedText(kb.lastStudiedAt))
@@ -35,13 +42,20 @@ struct LibraryHomeView: View {
                     if viewModel.knowledgeBases.isEmpty && !viewModel.isLoading {
                         Text("还没有知识库，点击右上角 + 创建").font(.system(size: 13)).foregroundColor(Color.zxF03).padding(.top, 40)
                     }
+                    if viewModel.hasMore {
+                        ZXLoadMoreFooter { await viewModel.loadMore() }
+                    }
                     NavigationLink(destination: CreateLibraryPage()) {
                         HStack(spacing: 8) { Image(systemName: "plus").font(.system(size: 16)); Text("创建新知识库").font(.system(size: 14, weight: .semibold)) }
                             .foregroundColor(Color.zxF05).frame(maxWidth: .infinity).frame(height: 52).background(Color.zxFill003)
                             .overlay(RoundedRectangle(cornerRadius: 16).strokeBorder(style: StrokeStyle(lineWidth: 1.5, dash: [6, 4]), antialiased: true).foregroundColor(Color.zxBorder01))
                             .clipShape(RoundedRectangle(cornerRadius: 16))
                     }
-                }.padding(.horizontal, 20).padding(.bottom, 120) }.scrollIndicators(.hidden)
+                    .accessibilityLabel("创建新知识库")
+                    .accessibilityHint("导入文档或文本生成结构化知识库")
+                }.padding(.horizontal, 20).padding(.bottom, 120) }
+                .scrollIndicators(.hidden)
+                .zxPullToRefresh { await viewModel.refresh() }
             }
         }
         .task { await viewModel.loadKnowledgeBases() }
diff --git a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
index f2566cd..ffacb36 100644
--- a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
+++ b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
@@ -26,6 +26,10 @@ struct LibraryDetailPage: View {
                 }
             }.padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 8)
             ScrollView { VStack(spacing: 12) {
+                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)
+                }
                 ForEach(viewModel.items) { item in
                     NavigationLink(destination: KnowledgeDetailPage(item: item)) {
                         ZXCardRow(emoji: "📝", title: item.title, desc: item.summary ?? item.content ?? "", status: item.status ?? "active", c: Color.zxGreen)
@@ -34,7 +38,12 @@ struct LibraryDetailPage: View {
                 if viewModel.items.isEmpty && !viewModel.isLoading {
                     Text("暂无知识点").font(.system(size: 13)).foregroundColor(Color.zxF03).padding(.top, 40)
                 }
-            }.padding(.horizontal, 20).padding(.bottom, 80) }.scrollIndicators(.hidden) }
+                if viewModel.hasMore {
+                    ZXLoadMoreFooter { await viewModel.loadMore(knowledgeBaseId: knowledgeBaseId) }
+                }
+            }.padding(.horizontal, 20).padding(.bottom, 80) }
+            .scrollIndicators(.hidden)
+            .zxPullToRefresh { await viewModel.refresh(knowledgeBaseId: knowledgeBaseId) } }
         }.navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden, for: .navigationBar)
         .task { await viewModel.loadItems(knowledgeBaseId: knowledgeBaseId) }
         }
diff --git a/AIStudyApp/AIStudyApp/Features/Library/LibraryViewModel.swift b/AIStudyApp/AIStudyApp/Features/Library/LibraryViewModel.swift
index b8dee1e..d884b0d 100644
--- a/AIStudyApp/AIStudyApp/Features/Library/LibraryViewModel.swift
+++ b/AIStudyApp/AIStudyApp/Features/Library/LibraryViewModel.swift
@@ -5,26 +5,59 @@ import Foundation
 class LibraryViewModel: ObservableObject {
     @Published var knowledgeBases: [KnowledgeBase] = []
     @Published var isLoading = false
+    @Published var isRefreshing = false
+    @Published var isLoadingMore = false
     @Published var errorMessage: String?
+    @Published var hasMore = true
+
+    private var currentPage = 1
+    private let pageSize = 20
 
     func loadKnowledgeBases() async {
         isLoading = true
         errorMessage = nil
+        currentPage = 1
         do {
-            knowledgeBases = try await KnowledgeBaseService.shared.list()
+            knowledgeBases = try await KnowledgeBaseService.shared.list(page: 1, limit: pageSize)
+            hasMore = knowledgeBases.count >= pageSize
         } catch {
-            errorMessage = "加载知识库失败"
+            if knowledgeBases.isEmpty { errorMessage = "加载知识库失败" }
         }
         isLoading = false
     }
 
+    func refresh() async {
+        isRefreshing = true
+        currentPage = 1
+        do {
+            knowledgeBases = try await KnowledgeBaseService.shared.list(page: 1, limit: pageSize)
+            hasMore = knowledgeBases.count >= pageSize
+        } catch {}
+        isRefreshing = false
+    }
+
+    func loadMore() async {
+        guard !isLoadingMore, hasMore else { return }
+        isLoadingMore = true
+        currentPage += 1
+        do {
+            let more = try await KnowledgeBaseService.shared.list(page: currentPage, limit: pageSize)
+            knowledgeBases.append(contentsOf: more)
+            hasMore = more.count >= pageSize
+        } catch {
+            currentPage -= 1
+        }
+        isLoadingMore = false
+    }
+
     func createKnowledgeBase(title: String, description: String?) async -> KnowledgeBase? {
         do {
             let kb = try await KnowledgeBaseService.shared.create(title: title, description: description)
             knowledgeBases.insert(kb, at: 0)
+            ZXToastManager.shared.success("知识库已创建")
             return kb
         } catch {
-            errorMessage = "创建知识库失败"
+            ZXToastManager.shared.error("创建失败")
             return nil
         }
     }
@@ -33,8 +66,9 @@ class LibraryViewModel: ObservableObject {
         do {
             _ = try await KnowledgeBaseService.shared.delete(id: id)
             knowledgeBases.removeAll { $0.id == id }
+            ZXToastManager.shared.success("已删除")
         } catch {
-            errorMessage = "删除知识库失败"
+            ZXToastManager.shared.error("删除失败")
         }
     }
 }
@@ -44,25 +78,55 @@ class LibraryDetailViewModel: ObservableObject {
     @Published var items: [KnowledgeItem] = []
     @Published var knowledgeBase: KnowledgeBase?
     @Published var isLoading = false
+    @Published var isRefreshing = false
+    @Published var isLoadingMore = false
     @Published var errorMessage: String?
+    @Published var hasMore = true
+
+    private var currentPage = 1
+    private let pageSize = 20
 
     func loadItems(knowledgeBaseId: String) async {
         isLoading = true
         errorMessage = nil
+        currentPage = 1
         do {
             items = try await KnowledgeItemService.shared.list(knowledgeBaseId: knowledgeBaseId)
+            hasMore = items.count >= pageSize
         } catch {
-            errorMessage = "加载知识点失败"
+            if items.isEmpty { errorMessage = "加载知识点失败" }
         }
         isLoading = false
     }
 
+    func refresh(knowledgeBaseId: String) async {
+        isRefreshing = true
+        currentPage = 1
+        do {
+            items = try await KnowledgeItemService.shared.list(knowledgeBaseId: knowledgeBaseId)
+            hasMore = items.count >= pageSize
+        } catch {}
+        isRefreshing = false
+    }
+
+    func loadMore(knowledgeBaseId: String) async {
+        guard !isLoadingMore, hasMore else { return }
+        isLoadingMore = true
+        currentPage += 1
+        do {
+            let more = try await KnowledgeItemService.shared.list(knowledgeBaseId: knowledgeBaseId)
+            items.append(contentsOf: more)
+            hasMore = more.count >= pageSize
+        } catch {
+            currentPage -= 1
+        }
+        isLoadingMore = false
+    }
+
     func loadKnowledgeBase(id: String) async {
         do {
             knowledgeBase = try await KnowledgeBaseService.shared.detail(id: id)
-        } catch {
-            errorMessage = "加载知识库详情失败"
-        }
+        } catch {}
     }
 
     func addItem(knowledgeBaseId: String, title: String, content: String?) async -> KnowledgeItem? {
@@ -71,9 +135,10 @@ class LibraryDetailViewModel: ObservableObject {
                 knowledgeBaseId: knowledgeBaseId, title: title, content: content
             )
             items.append(item)
+            ZXToastManager.shared.success("知识点已添加")
             return item
         } catch {
-            errorMessage = "添加知识点失败"
+            ZXToastManager.shared.error("添加失败")
             return nil
         }
     }
diff --git a/AIStudyApp/AIStudyApp/Features/Profile/EditProfilePage.swift b/AIStudyApp/AIStudyApp/Features/Profile/EditProfilePage.swift
index 61bae88..97b4a97 100644
--- a/AIStudyApp/AIStudyApp/Features/Profile/EditProfilePage.swift
+++ b/AIStudyApp/AIStudyApp/Features/Profile/EditProfilePage.swift
@@ -8,6 +8,8 @@ struct EditProfilePage: View {
     @State private var bio: String = ""
     @State private var currentGoal: String = ""
     @State private var saved = false
+    @State private var isSaving = false
+    @State private var saveError: String?
 
     var body: some View {
         ZStack {
@@ -49,28 +51,48 @@ struct EditProfilePage: View {
                     .background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 20))
                     .overlay(RoundedRectangle(cornerRadius: 20).stroke(Color.zxBorder006, lineWidth: 1))
 
+                    if let error = saveError {
+                        Text(error).font(.system(size: 13)).foregroundColor(.red)
+                            .padding(.horizontal, 16).padding(.vertical, 10)
+                            .background(Color.red.opacity(0.1))
+                            .clipShape(RoundedRectangle(cornerRadius: 10))
+                    }
+
                     Button {
                         Task {
-                            _ = try? await UserService.shared.updateProfile(UpdateProfileRequest(
-                                nickname: nickname.isEmpty ? nil : nickname, avatarUrl: nil
-                            ))
-                            _ = try? await UserService.shared.updateProfileDetail(UpdateProfileDataRequest(
-                                learningIdentity: learningIdentity.isEmpty ? nil : learningIdentity,
-                                learningDirection: learningDirection.isEmpty ? nil : learningDirection,
-                                bio: bio.isEmpty ? nil : bio,
-                                currentGoal: currentGoal.isEmpty ? nil : currentGoal
-                            ))
-                            saved = true
+                            isSaving = true
+                            saveError = nil
+                            do {
+                                _ = try await UserService.shared.updateProfile(UpdateProfileRequest(
+                                    nickname: nickname.isEmpty ? nil : nickname, avatarUrl: nil
+                                ))
+                                _ = try await UserService.shared.updateProfileDetail(UpdateProfileDataRequest(
+                                    learningIdentity: learningIdentity.isEmpty ? nil : learningIdentity,
+                                    learningDirection: learningDirection.isEmpty ? nil : learningDirection,
+                                    bio: bio.isEmpty ? nil : bio,
+                                    currentGoal: currentGoal.isEmpty ? nil : currentGoal
+                                ))
+                                saved = true
+                            } catch {
+                                saveError = "保存失败: \(error.localizedDescription)"
+                            }
+                            isSaving = false
                         }
                     } label: {
-                        Text(saved ? "已保存" : "保存修改")
-                            .font(.system(size: 14, weight: .bold))
-                            .foregroundColor(.white)
-                            .frame(maxWidth: .infinity)
-                            .frame(height: 52)
-                            .background(ZXGradient.ctaPurple)
-                            .clipShape(RoundedRectangle(cornerRadius: 16))
+                        HStack(spacing: 8) {
+                            if isSaving { ProgressView().tint(.white) }
+                            Text(saved ? "已保存" : "保存修改")
+                                .font(.system(size: 14, weight: .bold))
+                                .foregroundColor(.white)
+                        }
+                        .frame(maxWidth: .infinity)
+                        .frame(height: 52)
+                        .background {
+                            if isSaving { Color.gray } else { ZXGradient.ctaPurple }
+                        }
+                        .clipShape(RoundedRectangle(cornerRadius: 16))
                     }
+                    .disabled(isSaving)
                 }
                 .padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 80)
             }
diff --git a/AIStudyApp/AIStudyApp/Features/Profile/NotificationListView.swift b/AIStudyApp/AIStudyApp/Features/Profile/NotificationListView.swift
index dd55ee8..5d3de80 100644
--- a/AIStudyApp/AIStudyApp/Features/Profile/NotificationListView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Profile/NotificationListView.swift
@@ -1,28 +1,29 @@
 import SwiftUI
 
 struct NotificationListView: View {
-    @State private var notifications: [ZXNotificationRowData] = [
-        .init(type: "review", title: "复习提醒", content: "你有 8 个知识点需要复习", time: "刚刚", read: false),
-        .init(type: "ai", title: "AI 分析完成", content: "\"机器学习基础\"薄弱点分析已完成", time: "1小时前", read: false),
-        .init(type: "streak", title: "学习成就", content: "恭喜！你已连续学习 14 天 🔥", time: "昨天", read: true),
-        .init(type: "review", title: "复习提醒", content: "今天有 3 个知识点需要费曼解释练习", time: "2天前", read: true),
-        .init(type: "system", title: "系统通知", content: "v1.0 版本已更新，新增间隔复习功能", time: "3天前", read: true),
-    ]
+    @State private var notifications: [NotificationItem] = []
+    @State private var isLoading = false
+    @State private var isRefreshing = false
 
     var body: some View {
         ZStack {
             Color.zxBg0.ignoresSafeArea()
             ScrollView {
                 VStack(spacing: 0) {
-                    if notifications.isEmpty {
+                    if isLoading && notifications.isEmpty {
+                        VStack(spacing: 12) {
+                            ZXLoadingView(size: 36, lineWidth: 3)
+                            Text("加载中…").font(.system(size: 13)).foregroundColor(Color.zxF04)
+                        }.padding(.top, 120)
+                    } else if notifications.isEmpty {
                         VStack(spacing: 12) {
                             Image(systemName: "bell.slash").font(.system(size: 40)).foregroundColor(Color.zxF03)
                             Text("暂无通知").font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF03)
                         }.padding(.top, 120)
                     } else {
                         ForEach(Array(notifications.enumerated()), id: \.offset) { i, n in
-                            ZXNotificationRow(item: n) {
-                                notifications[i].read = true
+                            ZXNotificationItemRow(item: n) {
+                                Task { _ = try? await NotificationService.shared.markRead(id: n.id) }
                             }
                             if i < notifications.count - 1 {
                                 ZXSettingDivider()
@@ -33,28 +34,40 @@ struct NotificationListView: View {
                 .background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 20))
                 .overlay(RoundedRectangle(cornerRadius: 20).stroke(Color.zxBorder006, lineWidth: 1))
                 .padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 100)
-            }.scrollIndicators(.hidden)
-        }.navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden, for: .navigationBar)
+            }
+            .scrollIndicators(.hidden)
+            .zxPullToRefresh { await refresh() }
+        }
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbarBackground(.hidden, for: .navigationBar)
+        .task { await loadNotifications() }
+    }
+
+    private func loadNotifications() async {
+        isLoading = true
+        do {
+            notifications = try await NotificationService.shared.list()
+        } catch { /* keep empty state */ }
+        isLoading = false
+    }
+
+    private func refresh() async {
+        isRefreshing = true
+        do {
+            notifications = try await NotificationService.shared.list()
+        } catch {}
+        isRefreshing = false
     }
 }
 
-struct ZXNotificationRowData: Identifiable {
-    let id = UUID()
-    let type: String
-    let title: String
-    let content: String
-    let time: String
-    var read: Bool
-}
-
-struct ZXNotificationRow: View {
-    let item: ZXNotificationRowData
+struct ZXNotificationItemRow: View {
+    let item: NotificationItem
     let onTap: () -> Void
 
     private var iconName: String {
         switch item.type {
         case "review": return "arrow.triangle.2.circlepath"
-        case "ai": return "sparkles"
+        case "ai_analysis": return "sparkles"
         case "streak": return "flame.fill"
         default: return "bell.fill"
         }
@@ -63,7 +76,7 @@ struct ZXNotificationRow: View {
     private var iconColor: Color {
         switch item.type {
         case "review": return Color.zxOrange
-        case "ai": return Color.zxPurple
+        case "ai_analysis": return Color.zxPurple
         case "streak": return Color.zxGreen
         default: return Color.zxAccent
         }
@@ -77,12 +90,14 @@ struct ZXNotificationRow: View {
                 VStack(alignment: .leading, spacing: 4) {
                     HStack {
                         Text(item.title).font(.system(size: 14, weight: .semibold)).foregroundColor(Color.zxF0)
-                        if !item.read {
+                        if item.readAt == nil {
                             Circle().fill(Color.zxPurple).frame(width: 6, height: 6)
                         }
                     }
                     Text(item.content).font(.system(size: 12)).foregroundColor(Color.zxF04).lineLimit(2)
-                    Text(item.time).font(.system(size: 10)).foregroundColor(Color.zxF03)
+                    if let createdAt = item.createdAt {
+                        Text(createdAt.prefix(10).description).font(.system(size: 10)).foregroundColor(Color.zxF03)
+                    }
                 }
                 Spacer()
                 Image(systemName: "chevron.right").font(.system(size: 12)).foregroundColor(Color.zxF03)
diff --git a/AIStudyApp/AIStudyApp/Features/Profile/ProfileView.swift b/AIStudyApp/AIStudyApp/Features/Profile/ProfileView.swift
index 1c06369..2d5b334 100644
--- a/AIStudyApp/AIStudyApp/Features/Profile/ProfileView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Profile/ProfileView.swift
@@ -4,7 +4,6 @@ struct ProfileView: View {
     @StateObject private var viewModel = ProfileViewModel()
 
     var body: some View {
-        let _ = Task { if viewModel.userProfile == nil { await viewModel.loadAll() } }
         ZStack {
             ZXGradient.page.ignoresSafeArea()
             ScrollView {
@@ -18,12 +17,14 @@ struct ProfileView: View {
                                 .clipShape(RoundedRectangle(cornerRadius: 10))
                                 .overlay(RoundedRectangle(cornerRadius: 10).stroke(Color.zxBorder008, lineWidth: 1))
                         }
+                        .accessibilityLabel("通知中心")
                         NavigationLink(destination: SettingsView()) {
                             Image(systemName: "gearshape").font(.system(size: 18)).foregroundColor(Color.zxF05)
                                 .frame(width: 36, height: 36).background(Color(hex:"#FFFFFF",opacity:0.05))
                                 .clipShape(RoundedRectangle(cornerRadius: 10))
                                 .overlay(RoundedRectangle(cornerRadius: 10).stroke(Color.zxBorder008, lineWidth: 1))
                         }
+                        .accessibilityLabel("设置")
                     }.padding(.horizontal, 20).padding(.top, ZXSpacing.statusBarH + 16).padding(.bottom, 4)
                     profileCard
                     VStack(spacing: 0) {
@@ -47,6 +48,7 @@ struct ProfileView: View {
                 }.padding(.horizontal, 20)
             }.scrollIndicators(.hidden)
         }
+        .task { await viewModel.loadAll() }
     }
     private var profileCard: some View {
         let profile = viewModel.userProfile
@@ -63,6 +65,8 @@ struct ProfileView: View {
                 HStack(spacing: 0) { ZXProfileStat(value: "\(viewModel.summary?.activeDays ?? 0)", label: "活跃天", color: Color.zxOrange); ZXProfileStat(value: "\(viewModel.summary?.totalCardsReviewed ?? 0)", label: "复习卡片", color: Color.zxPurple); ZXProfileStat(value: "\(viewModel.summary?.totalMinutes ?? 0)", label: "分钟", color: Color.zxTeal) }
             }.padding(20).background(ZXGradient.profileCard).overlay(RoundedRectangle(cornerRadius: 20).stroke(Color(hex: "#7C6EFA", opacity: 0.2), lineWidth: 1)).clipShape(RoundedRectangle(cornerRadius: 20))
         }.foregroundColor(.primary)
+        .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 {
         VStack(alignment: .leading, spacing: 12) {
@@ -75,7 +79,7 @@ struct ZXProfileStat: View { let v: String; let l: String; let c: Color; var bod
     init(value: String, label: String, color: Color) { self.v = value; self.l = label; self.c = color }
 }
 struct ZXProfileMenuRow: View { let emoji: String; let title: String; let desc: String
-    var body: some View { HStack(spacing: 12) { Text(emoji).font(.system(size: 20)).frame(width: 36, height: 36).background(Color.zxFill006).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(); Image(systemName: "chevron.right").font(.system(size: 12)).foregroundColor(Color.zxF03) }.padding(.horizontal, 16).padding(.vertical, 14) }
+    var body: some View { HStack(spacing: 12) { Text(emoji).font(.system(size: 20)).frame(width: 36, height: 36).background(Color.zxFill006).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(); Image(systemName: "chevron.right").font(.system(size: 12)).foregroundColor(Color.zxF03) }.padding(.horizontal, 16).padding(.vertical, 14).accessibilityLabel("\(title)：\(desc)") }
 }
 struct ZXProfileDivider: View {
     var body: some View { Rectangle().fill(Color.zxBorder008).frame(height: 1).padding(.leading, 64) }
diff --git a/AIStudyApp/AIStudyApp/Features/Profile/ProfileViewModel.swift b/AIStudyApp/AIStudyApp/Features/Profile/ProfileViewModel.swift
index ae54c34..9bbf478 100644
--- a/AIStudyApp/AIStudyApp/Features/Profile/ProfileViewModel.swift
+++ b/AIStudyApp/AIStudyApp/Features/Profile/ProfileViewModel.swift
@@ -13,23 +13,20 @@ class ProfileViewModel: ObservableObject {
     func loadAll() async {
         isLoading = true
         errorMessage = nil
-        async let _ = loadProfile()
-        async let _ = loadActivitySummary()
+        await loadProfile()
         isLoading = false
+        Task { await loadActivitySummary() }
     }
 
     func loadProfile() async {
-        isLoading = true
-        errorMessage = nil
         do {
             let profile = try await UserService.shared.myProfile()
             userProfile = profile
             preferences = profile.preferences
             profileData = profile.profile
         } catch {
-            errorMessage = "加载用户信息失败"
+            if userProfile == nil { errorMessage = "加载用户信息失败" }
         }
-        isLoading = false
     }
 
     func updatePreferences(_ dto: UpdatePreferencesRequest) async {
diff --git a/AIStudyApp/AIStudyApp/Features/Profile/SettingsView.swift b/AIStudyApp/AIStudyApp/Features/Profile/SettingsView.swift
index 9ea4c4c..15ed115 100644
--- a/AIStudyApp/AIStudyApp/Features/Profile/SettingsView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Profile/SettingsView.swift
@@ -18,13 +18,6 @@ struct SettingsView: View {
         ZStack {
             Color.zxBg0.ignoresSafeArea()
             ScrollView {
-                let _ = Task { await profileVM.loadProfile(); if let p = profileVM.preferences {
-                    appearance = p.appearance ?? "system"
-                    language = p.language ?? "zh-CN"
-                    defaultFocusMinutes = p.defaultFocusMinutes ?? 25
-                    notificationEnabled = p.notificationEnabled ?? true
-                    reviewReminder = notificationEnabled
-                } }
                 VStack(spacing: 16) {
                     sectionHeader("外观与语言")
                     VStack(spacing: 0) {
@@ -113,6 +106,15 @@ struct SettingsView: View {
             }
             .scrollIndicators(.hidden)
         }
+        .task { await profileVM.loadProfile() }
+        .onChange(of: profileVM.preferences) { _, p in
+            guard let p else { return }
+            appearance = p.appearance ?? "system"
+            language = p.language ?? "zh-CN"
+            defaultFocusMinutes = p.defaultFocusMinutes ?? 25
+            notificationEnabled = p.notificationEnabled ?? true
+            reviewReminder = notificationEnabled
+        }
         .navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden, for: .navigationBar)
     }
 
diff --git a/AIStudyApp/AIStudyApp/Features/Study/LearningSessionView.swift b/AIStudyApp/AIStudyApp/Features/Study/LearningSessionView.swift
index 2ead523..8f83811 100644
--- a/AIStudyApp/AIStudyApp/Features/Study/LearningSessionView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Study/LearningSessionView.swift
@@ -10,6 +10,8 @@ struct LearningSessionView: View {
     @State private var isRunning = true
     @State private var isPaused = false
     @State private var showEndConfirm = false
+    @State private var showCelebration = false
+    @State private var sessionEnded = false
     let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
 
     var body: some View {
@@ -38,9 +40,16 @@ struct LearningSessionView: View {
             if isRunning { elapsed += 1 }
         }
         .confirmationDialog("结束学习？", isPresented: $showEndConfirm, titleVisibility: .visible) {
-            Button("结束并保存", role: .destructive) { isRunning = false }
+            Button("结束并保存", role: .destructive) { isRunning = false; sessionEnded = true; showCelebration = true }
             Button("继续学习", role: .cancel) {}
         }
+        .overlay {
+            if showCelebration {
+                ZXCelebrationView(title: "学习完成", subtitle: "你已专注学习了 \(formatTime(elapsed))，继续保持！") {
+                    withAnimation(.easeOut(duration: 0.3)) { showCelebration = false }
+                }
+            }
+        }
     }
 
     private var timerCard: some View {
@@ -73,6 +82,8 @@ struct LearningSessionView: View {
                         .background(ZXGradient.brandPurple)
                         .clipShape(RoundedRectangle(cornerRadius: 14))
                 }
+                .zxPressable()
+                .accessibilityLabel(isRunning ? "暂停学习" : "继续学习")
                 Button { showEndConfirm = true } label: {
                     Label("结束", systemImage: "stop.fill")
                         .font(.system(size: 14, weight: .semibold))
@@ -82,6 +93,9 @@ struct LearningSessionView: View {
                         .overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1))
                         .clipShape(RoundedRectangle(cornerRadius: 14))
                 }
+                .zxPressable()
+                .accessibilityLabel("结束学习")
+                .accessibilityHint("停止计时并保存本次学习记录")
             }
         }
         .padding(24)
diff --git a/AIStudyApp/AIStudyApp/Features/Study/ReviewCardView.swift b/AIStudyApp/AIStudyApp/Features/Study/ReviewCardView.swift
index 04082a5..7d3ca89 100644
--- a/AIStudyApp/AIStudyApp/Features/Study/ReviewCardView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Study/ReviewCardView.swift
@@ -18,6 +18,7 @@ struct ReviewCardView: View {
     @State private var flipped = false
     @State private var rating: Int? = nil
     @State private var finish = false
+    @State private var showCelebration = false
 
     var current: ReviewCardItem { cards[idx] }
 
@@ -41,6 +42,13 @@ struct ReviewCardView: View {
         .navigationBarTitleDisplayMode(.inline)
         .toolbarBackground(.hidden, for: .navigationBar)
         .task { await viewModel.loadDueCards() }
+        .overlay {
+            if showCelebration {
+                ZXCelebrationView(title: "复习完成", subtitle: "你已完成本次间隔复习，继续保持！") {
+                    withAnimation(.easeOut(duration: 0.3)) { showCelebration = false }
+                }
+            }
+        }
     }
 
     private var progressBar: some View {
@@ -105,6 +113,11 @@ struct ReviewCardView: View {
         .overlay(RoundedRectangle(cornerRadius: 20).stroke((flipped ? Color.zxPurple : Color.zxAccent).opacity(0.15), lineWidth: 1))
         .clipShape(RoundedRectangle(cornerRadius: 20))
         .onTapGesture { withAnimation(.easeInOut(duration: 0.4)) { flipped.toggle() } }
+        .zxPressable()
+        .accessibilityElement(children: .combine)
+        .accessibilityLabel(flipped ? "答案：\(current.answer)" : "问题：\(current.question)")
+        .accessibilityHint(flipped ? "来源：\(current.source)" : "双击翻转查看答案")
+        .accessibilityAddTraits(.isButton)
     }
 
     private var ratingBar: some View {
@@ -130,6 +143,7 @@ struct ReviewCardView: View {
             DispatchQueue.main.asyncAfter(deadline: .now() + 0.15) { idx += 1 }
         } else {
             finish = true
+            showCelebration = true
         }
     }
 }
@@ -157,5 +171,8 @@ struct ZXRatingBtn: View {
                 if !selected { RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1) }
             }
         }
+        .zxPressable()
+        .accessibilityLabel("\(label)")
+        .accessibilityHint("将此卡片标记为\(label)")
     }
 }
diff --git a/AIStudyApp/AIStudyApp/Features/Study/ReviewPlanViewModel.swift b/AIStudyApp/AIStudyApp/Features/Study/ReviewPlanViewModel.swift
new file mode 100644
index 0000000..ed2aa2d
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Features/Study/ReviewPlanViewModel.swift
@@ -0,0 +1,59 @@
+import Combine
+import Foundation
+
+struct ReviewTask: Identifiable, Equatable {
+    let id: String
+    let userId: String
+    let lessonId: String
+    let sourceSessionId: String
+    let reviewType: ReviewType
+    let scheduledAt: String
+    let completedAt: String?
+    var status: ReviewTaskStatus
+}
+
+enum ReviewType: String {
+    case recall, feynman, review
+}
+
+enum ReviewTaskStatus: String {
+    case pending, completed
+}
+
+@MainActor
+final class ReviewPlanViewModel: ObservableObject {
+    @Published var todayTasks: [ReviewTask] = [
+        ReviewTask(id: "t1", userId: "u1", lessonId: "l1", sourceSessionId: "s1",
+                   reviewType: .recall, scheduledAt: "", completedAt: nil, status: .pending),
+        ReviewTask(id: "t2", userId: "u1", lessonId: "l2", sourceSessionId: "s2",
+                   reviewType: .feynman, scheduledAt: "", completedAt: nil, status: .completed),
+        ReviewTask(id: "t3", userId: "u1", lessonId: "l3", sourceSessionId: "s3",
+                   reviewType: .review, scheduledAt: "", completedAt: nil, status: .pending),
+    ]
+
+    @Published var tomorrowTasks: [ReviewTask] = [
+        ReviewTask(id: "t4", userId: "u1", lessonId: "l4", sourceSessionId: "s4",
+                   reviewType: .recall, scheduledAt: "", completedAt: nil, status: .pending),
+        ReviewTask(id: "t5", userId: "u1", lessonId: "l5", sourceSessionId: "s5",
+                   reviewType: .feynman, scheduledAt: "", completedAt: nil, status: .pending),
+    ]
+
+    @Published var weekTasks: [ReviewTask] = [
+        ReviewTask(id: "t6", userId: "u1", lessonId: "l6", sourceSessionId: "s6",
+                   reviewType: .review, scheduledAt: "", completedAt: nil, status: .pending),
+        ReviewTask(id: "t7", userId: "u1", lessonId: "l7", sourceSessionId: "s7",
+                   reviewType: .recall, scheduledAt: "", completedAt: nil, status: .completed),
+    ]
+
+    var totalCount: Int { todayTasks.count + tomorrowTasks.count + weekTasks.count }
+
+    func toggleTask(_ task: ReviewTask) {
+        for list in [\ReviewPlanViewModel.todayTasks, \.tomorrowTasks, \.weekTasks] {
+            if let idx = self[keyPath: list].firstIndex(where: { $0.id == task.id }) {
+                let current = self[keyPath: list][idx].status
+                self[keyPath: list][idx].status = current == .completed ? .pending : .completed
+                return
+            }
+        }
+    }
+}
diff --git a/AIStudyApp/AIStudyApp/Features/Study/StudyHomeView.swift b/AIStudyApp/AIStudyApp/Features/Study/StudyHomeView.swift
index d7a0022..2aa6fdd 100644
--- a/AIStudyApp/AIStudyApp/Features/Study/StudyHomeView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Study/StudyHomeView.swift
@@ -2,26 +2,19 @@ import SwiftUI
 
 struct StudyHomeView: View {
     @StateObject private var studyVM = StudyViewModel()
+    @StateObject private var studyHomeVM = StudyHomeViewModel()
     @StateObject private var reviewVM = ReviewViewModel()
-    @State private var ts: [ZXSTask] = [
-        .init(t: "机器学习 - 回忆测试", tp: "回忆测试", c: Color.zxPurple, m: 10, d: true),
-        .init(t: "高数 - 间隔复习 8 题", tp: "间隔复习", c: Color.zxOrange, m: 15, d: true),
-        .init(t: "英语词汇 - 25 个待复习", tp: "词汇复习", c: Color.zxTeal, m: 8, d: false),
-        .init(t: "注意力机制 - 费曼解释", tp: "费曼练习", c: Color.zxAccent, m: 12, d: false),
-        .init(t: "产品设计 - 薄弱点复习", tp: "薄弱点", c: Color.zxYellow, m: 10, d: false),
-    ]
-    private let wb: [CGFloat] = [0.3, 0.7, 1.0, 0.4, 0.9, 0.6, 0.2]
-    private let dl = ["一","二","三","四","五","六","日"]
 
     var body: some View {
         ZStack { ZXGradient.page.ignoresSafeArea()
             ScrollView { VStack(spacing: 16) {
-                HStack { VStack(alignment: .leading, spacing: 2) { Text("周四，1月16日").font(.system(size: 12, weight: .medium)).foregroundColor(Color.zxF04); Text("学习工作台").font(.system(size: 20, weight: .heavy)).foregroundColor(Color.zxF0).tracking(-0.4) }; Spacer()
+                HStack { VStack(alignment: .leading, spacing: 2) { Text("学习工作台").font(.system(size: 20, weight: .heavy)).foregroundColor(Color.zxF0).tracking(-0.4) }; Spacer()
+                    if studyVM.isLoading { ZXLoadingView(size: 22, lineWidth: 2) }
                     HStack(spacing: 4) { Image(systemName: "flame.fill").font(.system(size: 14)).foregroundColor(Color.zxOrange); Text("14 天连续").font(.system(size: 13, weight: .bold)).foregroundColor(Color.zxOrange) }.padding(.horizontal, 12).padding(.vertical, 6).background(Color.zxOrangeBG(0.1)).clipShape(Capsule()).overlay(Capsule().stroke(Color(hex: "#F97316", opacity: 0.2), lineWidth: 1)) }
                     .padding(.horizontal, 20).padding(.top, ZXSpacing.statusBarH + 16).padding(.bottom, 4)
                 pc
                 VStack(alignment: .leading, spacing: 12) { HStack { Text("今日任务").font(.system(size: 15, weight: .bold)).foregroundColor(Color.zxF0); Spacer(); HStack(spacing: 4) { Image(systemName: "calendar").font(.system(size: 12)).foregroundColor(Color.zxF04); Text("AI 自动排期").font(.system(size: 12)).foregroundColor(Color.zxF04) } }
-                    ForEach($ts) { $t in
+                    ForEach($studyHomeVM.tasks) { $t in
                         if t.tp == "回忆测试" {
                             NavigationLink(destination: ActiveRecallView()) { ZXSTaskRowView(task: t) { t.d.toggle() } }.foregroundColor(.primary)
                         } else if t.tp == "费曼练习" {
@@ -36,14 +29,16 @@ struct StudyHomeView: View {
                     }
                 }
                 VStack(alignment: .leading, spacing: 14) { Text("本周学习活跃").font(.system(size: 15, weight: .bold)).foregroundColor(Color.zxF0)
-                    HStack(alignment: .bottom, spacing: 8) { ForEach(0..<7, id: \.self) { i in VStack(spacing: 8) { RoundedRectangle(cornerRadius: 6).fill(i == 6 ? Color.zxFill01 : Color(hex: "#7C6EFA", opacity: wb[i] * 0.9 + 0.1)).frame(height: wb[i] * 60); Text(dl[i]).font(.system(size: 10, weight: i == 2 ? .bold : .regular)).foregroundColor(i == 2 ? Color.zxPurple : Color.zxF03) }.frame(maxWidth: .infinity) } }
+                    HStack(alignment: .bottom, spacing: 8) { ForEach(0..<7, id: \.self) { i in VStack(spacing: 8) { RoundedRectangle(cornerRadius: 6).fill(i == 6 ? Color.zxFill01 : Color(hex: "#7C6EFA", opacity: studyHomeVM.weekActivity[i] * 0.9 + 0.1)).frame(height: studyHomeVM.weekActivity[i] * 60); Text(studyHomeVM.dayLabels[i]).font(.system(size: 10, weight: i == 2 ? .bold : .regular)).foregroundColor(i == 2 ? Color.zxPurple : Color.zxF03) }.frame(maxWidth: .infinity) } }
                     HStack { Text("总计 3.5 小时").font(.system(size: 11)).foregroundColor(Color.zxF03); Spacer(); Text("日均 30 分钟").font(.system(size: 11)).foregroundColor(Color.zxF03) } }
                 .padding(.bottom, 120) }
                 .padding(.horizontal, 20) }
-                .scrollIndicators(.hidden) }
+                .scrollIndicators(.hidden)
+                .zxPullToRefresh { await studyVM.loadSessions() }
+            }
             .task { await studyVM.loadSessions() }
     }
-    private var pc: some View { let dn = ts.filter(\.d).count; let pct = CGFloat(dn) / 5
+    private var pc: some View { let dn = studyHomeVM.doneCount; let pct = CGFloat(dn) / 5
         return VStack(spacing: 12) { HStack { VStack(alignment: .leading, spacing: 2) { Text("今日进度").font(.system(size: 13, weight: .medium)).foregroundColor(Color.zxF05); HStack(alignment: .lastTextBaseline, spacing: 6) { Text("\(dn)").font(.system(size: 26, weight: .black)).foregroundColor(Color.zxF0); Text("/ 5"); Text("个任务").font(.system(size: 14, weight: .medium)).foregroundColor(Color.zxF04) } }; Spacer()
             ZStack { Circle().trim(from: 0, to: pct).stroke(ZXGradient.brand, style: StrokeStyle(lineWidth: 8, lineCap: .round)).rotationEffect(.degrees(-90)).frame(width: 64, height: 64); Text("\(Int(pct * 100))%").font(.system(size: 14, weight: .heavy)).foregroundColor(Color.zxPurple) } }
             ZStack(alignment: .leading) { RoundedRectangle(cornerRadius: 3).fill(Color.zxFill008).frame(height: 6); RoundedRectangle(cornerRadius: 3).fill(LinearGradient(colors: [Color.zxPurple, Color.zxAccent], startPoint: .leading, endPoint: .trailing)).frame(width: max(6, pct * (UIScreen.main.bounds.width - 72)), height: 6) }
@@ -59,5 +54,8 @@ struct ZXSTaskRowView: View { let task: ZXSTask; var action: () -> Void
     var body: some View { HStack(spacing: 12) { Image(systemName: task.d ? "checkmark.circle.fill" : "circle").font(.system(size: 20)).foregroundColor(task.d ? Color.zxGreen : Color.zxF02)
         VStack(alignment: .leading, spacing: 4) { Text(task.t).font(.system(size: 13, weight: .semibold)).foregroundColor(task.d ? Color.zxF04 : Color.zxF0).strikethrough(task.d); HStack(spacing: 8) { Text(task.tp).font(.system(size: 10, weight: .semibold)).foregroundColor(task.c).padding(.horizontal, 6).padding(.vertical, 1).background(task.c.opacity(0.12)).clipShape(Capsule()); Text("约 \(task.m) 分钟").font(.system(size: 10)).foregroundColor(Color(hex:"#F0F0FF",opacity:0.35)) } }
         Spacer(); if !task.d { Image(systemName: "play.fill").font(.system(size: 14)).foregroundColor(.white).frame(width: 32, height: 32).background(ZXGradient.brand).clipShape(RoundedRectangle(cornerRadius: 10)) } }
-        .padding(.horizontal, 16).padding(.vertical, 12).background(task.d ? Color.zxFill003 : Color.zxFill005).overlay(RoundedRectangle(cornerRadius: 14).stroke(task.d ? Color(hex: "#FFFFFF", opacity: 0.05) : Color.zxBorder008, lineWidth: 1)).clipShape(RoundedRectangle(cornerRadius: 14)).opacity(task.d ? 0.6 : 1).contentShape(Rectangle()).onTapGesture { action() } }
+        .padding(.horizontal, 16).padding(.vertical, 12).background(task.d ? Color.zxFill003 : Color.zxFill005).overlay(RoundedRectangle(cornerRadius: 14).stroke(task.d ? Color(hex: "#FFFFFF", opacity: 0.05) : Color.zxBorder008, lineWidth: 1)).clipShape(RoundedRectangle(cornerRadius: 14)).opacity(task.d ? 0.6 : 1).contentShape(Rectangle()).onTapGesture { action() }.zxPressable()
+        .accessibilityLabel("\(task.t), \(task.tp), 约\(task.m)分钟")
+        .accessibilityAddTraits(task.d ? .isSelected : [])
+        .accessibilityHint(task.d ? "已完成" : "双击开始学习") }
 }
diff --git a/AIStudyApp/AIStudyApp/Features/Study/StudyHomeViewModel.swift b/AIStudyApp/AIStudyApp/Features/Study/StudyHomeViewModel.swift
new file mode 100644
index 0000000..f77be9f
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Features/Study/StudyHomeViewModel.swift
@@ -0,0 +1,26 @@
+import Combine
+import Foundation
+
+@MainActor
+final class StudyHomeViewModel: ObservableObject {
+    @Published var tasks: [ZXSTask] = [
+        ZXSTask(t: "机器学习 - 回忆测试", tp: "回忆测试", c: .zxPurple, m: 10, d: true),
+        ZXSTask(t: "高数 - 间隔复习 8 题", tp: "间隔复习", c: .zxOrange, m: 15, d: true),
+        ZXSTask(t: "英语词汇 - 25 个待复习", tp: "词汇复习", c: .zxTeal, m: 8, d: false),
+        ZXSTask(t: "注意力机制 - 费曼解释", tp: "费曼练习", c: .zxAccent, m: 12, d: false),
+        ZXSTask(t: "产品设计 - 薄弱点复习", tp: "薄弱点", c: .zxYellow, m: 10, d: false),
+    ]
+
+    @Published var weekActivity: [CGFloat] = [0.3, 0.7, 1.0, 0.4, 0.9, 0.6, 0.2]
+    let dayLabels = ["一", "二", "三", "四", "五", "六", "日"]
+
+    var doneCount: Int { tasks.filter(\.d).count }
+    var progress: Double { tasks.isEmpty ? 0 : Double(doneCount) / Double(tasks.count) }
+    var doneMinutes: Int { tasks.filter(\.d).map(\.m).reduce(0, +) }
+    var remainingMinutes: Int { tasks.filter { !$0.d }.map(\.m).reduce(0, +) }
+
+    func toggleTask(_ task: ZXSTask) {
+        guard let idx = tasks.firstIndex(where: { $0.id == task.id }) else { return }
+        tasks[idx].d.toggle()
+    }
+}