fix: resolve 3 compilation errors

- NotificationListView.swift: unwrap optional String? for Text()
- LocalCache.swift: add @escaping to fetch closure parameter
- ContentView.swift: reformat ZXTabBar body for item scope fix

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

AIStudyApp/AIStudyApp/ContentView.swift

@@ -21,42 +21,124 @@ struct ContentView: View {
 
 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")]
+    private let items = [
-    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)}}
+        ("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)
+                }
+                .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 {
     let icon: String; let size: CGFloat; var branded = false; let action: () -> Void
-    var body: some View {Button(action:action){Image(systemName:icon).font(.system(size:size*0.44)).frame(width:size,height:size)}.foregroundColor(branded ? .white:Color.zxF05).background(branded ? AnyView(ZXGradient.brand):AnyView(Color(hex:"#FFFFFF",opacity:0.05))).clipShape(RoundedRectangle(cornerRadius:10)).overlay{if !branded{RoundedRectangle(cornerRadius:10).stroke(Color.zxBorder008,lineWidth:1)}}}
+    var body: some View {
+        Button(action: action) {
+            Image(systemName: icon).font(.system(size: size * 0.44)).frame(width: size, height: size)
+        }
+        .foregroundColor(branded ? .white : Color.zxF05)
+        .background(branded ? AnyView(ZXGradient.brand) : AnyView(Color(hex: "#FFFFFF", opacity: 0.05)))
+        .clipShape(RoundedRectangle(cornerRadius: 10))
+        .overlay {
+            if !branded {
+                RoundedRectangle(cornerRadius: 10).stroke(Color.zxBorder008, lineWidth: 1)
+            }
+        }
+    }
 }
 
-struct ZXScoreBox: View {let score:Int;let bg:Color;let fg:Color
+struct ZXScoreBox: View {
-    var body: some View {Text("\(score)").font(.system(size:12,weight:.heavy)).foregroundColor(fg).frame(width:36,height:36).background(bg).clipShape(RoundedRectangle(cornerRadius:10))}
+    let score: Int; let bg: Color; let fg: Color
+    var body: some View {
+        Text("\(score)")
+            .font(.system(size: 12, weight: .heavy))
+            .foregroundColor(fg)
+            .frame(width: 36, height: 36)
+            .background(bg)
+            .clipShape(RoundedRectangle(cornerRadius: 10))
+    }
 }
 
 struct ZXWeakRow: View {
     let score: Int; let topic: String; let lib: String; let priority: String
     var body: some View {
         HStack(spacing: 12) {
-            Text("\(score)").font(.system(size:13,weight:.heavy)).foregroundColor(Color.zxYellow)
+            Text("\(score)").font(.system(size: 13, weight: .heavy)).foregroundColor(Color.zxYellow)
-                .frame(width:40,height:40).background(Color.zxYellowBG(0.15)).clipShape(RoundedRectangle(cornerRadius:12))
+                .frame(width: 40, height: 40).background(Color.zxYellowBG(0.15)).clipShape(RoundedRectangle(cornerRadius: 12))
-            VStack(alignment:.leading,spacing:2){
+            VStack(alignment: .leading, spacing: 2) {
-                Text(topic).font(.system(size:13,weight:.semibold)).foregroundColor(Color.zxF0)
+                Text(topic).font(.system(size: 13, weight: .semibold)).foregroundColor(Color.zxF0)
-                Text(lib).font(.system(size:11)).foregroundColor(Color.zxF04)
+                Text(lib).font(.system(size: 11)).foregroundColor(Color.zxF04)
-            }.frame(maxWidth:.infinity,alignment:.leading)
+            }.frame(maxWidth: .infinity, alignment: .leading)
-            Text("\(priority)优先").font(.system(size:11,weight:.bold))
+            Text("\(priority)优先").font(.system(size: 11, weight: .bold))
-                .foregroundColor(priority=="高" ? Color.zxRed:Color.zxYellow)
+                .foregroundColor(priority == "高" ? Color.zxRed : Color.zxYellow)
-                .padding(.horizontal,8).padding(.vertical,3)
+                .padding(.horizontal, 8).padding(.vertical, 3)
-                .background((priority=="高" ? Color.zxRedBG(0.15):Color.zxYellowBG(0.15))).clipShape(Capsule())
+                .background((priority == "高" ? Color.zxRedBG(0.15) : Color.zxYellowBG(0.15))).clipShape(Capsule())
         }
-        .padding(.horizontal,16).padding(.vertical,12)
+        .padding(.horizontal, 16).padding(.vertical, 12)
         .background(Color.zxYellowBG(0.06))
-        .overlay(RoundedRectangle(cornerRadius:14).stroke(Color(hex:"#F59E0B",opacity:0.15),lineWidth:1))
+        .overlay(RoundedRectangle(cornerRadius: 14).stroke(Color(hex: "#F59E0B", opacity: 0.15), lineWidth: 1))
-        .clipShape(RoundedRectangle(cornerRadius:14))
+        .clipShape(RoundedRectangle(cornerRadius: 14))
     }
 }
 
 struct ZXAIInputBar: View {
-    @Binding var text:String;let onSend:()->Void
+    @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).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)}
+    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)
+    }
 }

AIStudyApp/AIStudyApp/Core/Security/LocalCache.swift

@@ -70,7 +70,7 @@ extension LocalCache {
     func cacheFirst<T: Codable>(
         key: String,
         ttl: TimeInterval = 300,
-        fetch: @Sendable () async throws -> T
+        fetch: @Sendable @escaping () async throws -> T
     ) async throws -> T {
         if let cached: T = getWithExpiry(key, ttl: ttl) {
             Task { try? await refreshCache(key: key, ttl: ttl, fetch: fetch) }
@@ -84,7 +84,7 @@ extension LocalCache {
     private func refreshCache<T: Codable>(
         key: String,
         ttl: TimeInterval,
-        fetch: @Sendable () async throws -> T
+        fetch: @Sendable @escaping () async throws -> T
     ) async throws {
         let fresh = try await fetch()
         setWithExpiry(fresh, forKey: key, ttl: ttl)

AIStudyApp/AIStudyApp/Features/Profile/NotificationListView.swift

@@ -94,7 +94,7 @@ struct ZXNotificationItemRow: View {
                             Circle().fill(Color.zxPurple).frame(width: 6, height: 6)
                         }
                     }
-                    Text(item.content).font(.system(size: 12)).foregroundColor(Color.zxF04).lineLimit(2)
+                    Text(item.content ?? "").font(.system(size: 12)).foregroundColor(Color.zxF04).lineLimit(2)
                     if let createdAt = item.createdAt {
                         Text(createdAt.prefix(10).description).font(.system(size: 10)).foregroundColor(Color.zxF03)
                     }