```

feat(iOS): 更新MNN后端模型配置优化性能

将MNN主模型从Qwen3.5-4B(~2.64GiB)降级为Qwen3.5-2B(~1.1GiB)，因为4B版本
实测运行过慢，影响用户体验。iPhone17+/SME2设备使用2B模型，保留MLX
兜底方案用于模拟器和备用场景，确保AI推理性能和存储效率的平衡。
```

康康/Features/Archive/HealthExportSheet.swift

@@ -22,6 +22,11 @@ struct HealthExportSheet: View {
     @State private var answeringTurnID: UUID?
     @FocusState private var questionFocused: Bool
 
+    // 快捷问答
+    @State private var promptStore = QuickPromptStore.shared
+    @State private var showAddPrompt = false
+    @State private var newPromptText = ""
+
     init(initialPrompt: String = "") {
         self.initialPrompt = initialPrompt
     }
@@ -33,10 +38,16 @@ struct HealthExportSheet: View {
         !isGeneratingReport &&
         !draftQuestion.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
     }
+    /// 已有有效用户对话内容。
+    private var hasUserContent: Bool {
+        turns.contains(where: { $0.role == .user && !$0.text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty })
+    }
+
+    /// 可生成报告:有对话内容,或输入框里有文字(允许跳过多轮对话直接生成)。
     private var canGenerateReport: Bool {
         !isAnswering &&
         !isGeneratingReport &&
-        turns.contains(where: { $0.role == .user && !$0.text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty })
+        (hasUserContent || !draftQuestion.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty)
     }
 
     var body: some View {
@@ -88,6 +99,75 @@ struct HealthExportSheet: View {
             questionFocused = true
         }
         .onDisappear { task?.cancel() }
+        .alert("添加快捷问答", isPresented: $showAddPrompt) {
+            TextField("输入一句常用问题…", text: $newPromptText)
+            Button("取消", role: .cancel) { newPromptText = "" }
+            Button("添加") {
+                promptStore.add(prompt: newPromptText)
+                newPromptText = ""
+            }
+        } message: {
+            Text("保存后点一下,就能把这句话填进输入框")
+        }
+    }
+
+    // MARK: - 快捷问答
+
+    /// 内置 + 自定义快捷问答 chip 行;点 chip 填入输入框,末尾「＋ 自定义」追加,长按自定义删除。
+    private var quickPromptRow: some View {
+        ScrollView(.horizontal, showsIndicators: false) {
+            HStack(spacing: 8) {
+                ForEach(promptStore.all) { p in
+                    quickPromptChip(p)
+                }
+                addQuickPromptChip
+            }
+            .padding(.vertical, 1)   // 给 chip 描边留出像素,避免被 ScrollView 裁切
+        }
+    }
+
+    private func quickPromptChip(_ p: QuickPrompt) -> some View {
+        Button {
+            draftQuestion = p.prompt
+            questionFocused = true
+        } label: {
+            Text(p.title)
+                .font(.tjScaled( 12, weight: .medium))
+                .foregroundStyle(Tj.Palette.text)
+                .lineLimit(1)
+                .padding(.horizontal, 12)
+                .padding(.vertical, 7)
+                .background(Capsule().fill(Tj.Palette.sand2))
+                .overlay(Capsule().strokeBorder(Tj.Palette.lineSoft, lineWidth: 1))
+        }
+        .buttonStyle(.plain)
+        .contextMenu {
+            if !p.isBuiltin {
+                Button(role: .destructive) {
+                    promptStore.delete(p)
+                } label: {
+                    Label("删除", systemImage: "trash")
+                }
+            }
+        }
+    }
+
+    private var addQuickPromptChip: some View {
+        Button { showAddPrompt = true } label: {
+            Label("自定义", systemImage: "plus")
+                .font(.tjScaled( 12, weight: .medium))
+                .foregroundStyle(Tj.Palette.text2)
+                .padding(.horizontal, 12)
+                .padding(.vertical, 7)
+                .background(Capsule().fill(Tj.Palette.paper))
+                .overlay(
+                    Capsule().strokeBorder(
+                        Tj.Palette.line,
+                        style: StrokeStyle(lineWidth: 1, dash: [3])
+                    )
+                )
+        }
+        .buttonStyle(.plain)
     }
 
     // MARK: - Header
@@ -128,14 +208,7 @@ struct HealthExportSheet: View {
                 .font(.tjScaled( 13, weight: .semibold))
                 .foregroundStyle(Tj.Palette.text2)
 
-            VStack(alignment: .leading, spacing: 6) {
-                Text("例:最近血压波动大吗？")
-                    .font(.tjScaled( 12))
-                    .foregroundStyle(Tj.Palette.text3)
-                Text("例:把我最近头晕、睡眠和指标变化整理给医生")
-                    .font(.tjScaled( 12))
-                    .foregroundStyle(Tj.Palette.text3)
-            }
+            quickPromptRow
 
             Text("上下文:全部记录指标 + 健康日记 · 本地 RAG · 不上传任何数据")
                 .font(.tjScaled( 11))
@@ -162,11 +235,11 @@ struct HealthExportSheet: View {
                     .font(.tjScaled( 11, weight: .semibold))
                     .foregroundStyle(isUser ? Tj.Palette.paper.opacity(0.8) : Tj.Palette.text3)
                 if turn.id == answeringTurnID && turn.text.isEmpty {
-                    HStack(spacing: 8) {
-                        ProgressView()
+                    VStack(alignment: .leading, spacing: 8) {
                         Text("正在查看本地记录…")
                             .font(.tjScaled( 13))
                             .foregroundStyle(Tj.Palette.text3)
+                        AIFlowBar()
                     }
                 } else {
                     Text(turn.text)
@@ -196,6 +269,11 @@ struct HealthExportSheet: View {
                 .font(.tjScaled( 13, weight: .semibold))
                 .foregroundStyle(Tj.Palette.text2)
             MarkdownView(text: content)
+
+            if completed {
+                Divider().background(Tj.Palette.lineSoft)
+                AIDisclaimerFooter()
+            }
         }
         .padding(16)
         .frame(maxWidth: .infinity, alignment: .leading)
@@ -229,6 +307,9 @@ struct HealthExportSheet: View {
                     .font(.tjScaled( 11))
                     .foregroundStyle(Tj.Palette.text3)
             }
+
+            // AI 计算中:多彩流光线(与日记 AI 辅助同一组件)
+            AIFlowBar().padding(.top, 2)
         }
     }
 
@@ -291,7 +372,7 @@ struct HealthExportSheet: View {
             }
             .buttonStyle(TjGhostButton(height: 44, fontSize: 13, horizontalPadding: 14))
 
-            ShareLink(item: content) {
+            ShareLink(item: AIDisclaimer.appended(to: content)) {
                 Label("分享", systemImage: "square.and.arrow.up")
                     .font(.tjScaled( 13, weight: .semibold))
                     .tracking(1)
@@ -319,7 +400,7 @@ struct HealthExportSheet: View {
     private var composer: some View {
         VStack(spacing: 10) {
             HStack(spacing: 8) {
-                TextField("继续提问或补充情况…", text: $draftQuestion, axis: .vertical)
+                TextField("写下要整理什么,或先提问补充情况…", text: $draftQuestion, axis: .vertical)
                     .font(.tjScaled( 14))
                     .lineLimit(1...4)
                     .padding(.horizontal, 12)
@@ -342,12 +423,28 @@ struct HealthExportSheet: View {
                 .accessibilityLabel("发送问题")
             }
 
-            Button { startReportGeneration() } label: {
-                Label("生成整理报告", systemImage: "doc.text.below.ecg")
+            if isGeneratingReport {
+                Button { stopGeneration() } label: {
+                    Label("停止生成", systemImage: "stop.fill")
+                        .font(.tjScaled( 14, weight: .semibold))
+                        .foregroundStyle(Tj.Palette.brick)
+                        .frame(maxWidth: .infinity)
+                        .frame(height: 44)
+                        .background(
+                            RoundedRectangle(cornerRadius: Tj.Radius.sm, style: .continuous)
+                                .strokeBorder(Tj.Palette.brick, lineWidth: 1)
+                        )
+                        .contentShape(Rectangle())
+                }
+                .buttonStyle(.plain)
+            } else {
+                Button { startReportGeneration() } label: {
+                    Label("生成整理报告", systemImage: "doc.text.below.ecg")
+                }
+                .buttonStyle(TjPrimaryButton(height: 44, fontSize: 14))
+                .disabled(!canGenerateReport)
+                .opacity(canGenerateReport ? 1 : 0.45)
             }
-            .buttonStyle(TjPrimaryButton(height: 44, fontSize: 14))
-            .disabled(!canGenerateReport)
-            .opacity(canGenerateReport ? 1 : 0.45)
         }
         .padding(.horizontal, 20)
         .padding(.vertical, 12)
@@ -402,6 +499,15 @@ struct HealthExportSheet: View {
     private func startReportGeneration() {
         guard canGenerateReport else { return }
         questionFocused = false
+
+        // 直接生成:输入框里有文字(快捷问答/手输)就把它作为一条诉求追加进对话,
+        // 不必先走多轮问答 —— 用户点一下「生成报告」即可。
+        let draft = draftQuestion.trimmingCharacters(in: .whitespacesAndNewlines)
+        if !draft.isEmpty {
+            turns.append(.user(draft))
+            draftQuestion = ""
+        }
+
         content = ""
         rate = 0                 // 重新生成时清零,避免旧 tok/s 残留显示
         error = nil
@@ -435,6 +541,16 @@ struct HealthExportSheet: View {
         startReportGeneration()
     }
 
+    /// 停止正在进行的报告生成:取消推理任务,回到可重新生成的干净态(已写的诉求保留在对话里)。
+    private func stopGeneration() {
+        task?.cancel()
+        task = nil
+        phase = nil
+        rate = 0
+        completed = false
+        content = ""
+    }
+
     private func reset() {
         task?.cancel()
         task = nil
@@ -448,7 +564,7 @@ struct HealthExportSheet: View {
     }
 
     private func copy() {
-        UIPasteboard.general.string = content
+        UIPasteboard.general.string = AIDisclaimer.appended(to: content)
         copiedFlash = true
         DispatchQueue.main.asyncAfter(deadline: .now() + 1.4) {
             copiedFlash = false