diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetView.swift b/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetView.swift
index 3ed4894..534f942 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetView.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetView.swift
@@ -2,99 +2,130 @@ import SwiftUI
 
 struct FleetView: View {
     @StateObject private var model: FleetViewModel
-    @Environment(\.refresh) private var refreshEnvironment
+    @State private var showsDeleteDialog = false
 
     init(model: FleetViewModel? = nil) {
         _model = StateObject(wrappedValue: model ?? DefaultContainer.makeFleetModel())
     }
 
     var body: some View {
-        NavigationStack {
-            ZStack {
-                AITheme.canvas.ignoresSafeArea()
-                ScrollView {
-                    LazyVStack(spacing: 12) {
-                        searchField
-                        if model.rows.isEmpty && !model.isLoading {
-                            AICard {
-                                VStack(spacing: 10) {
-                                    Image(systemName: "server.rack")
-                                        .font(.system(size: 28))
-                                        .foregroundStyle(AITheme.muted)
-                                    Text("暂无实例")
-                                        .font(.headline)
-                                    Text("添加 SimAdmin 实例后即可开始管理。")
-                                        .font(.subheadline)
-                                        .foregroundStyle(AITheme.muted)
-                                }
-                                .frame(maxWidth: .infinity)
-                                .padding(.vertical, 18)
+        ZStack {
+            AITheme.canvas.ignoresSafeArea()
+            ScrollView {
+                LazyVStack(spacing: 12) {
+                    searchField
+                    if model.selectionMode {
+                        selectionBar
+                    }
+                    if model.rows.isEmpty && !model.isLoading {
+                        AICard {
+                            VStack(spacing: 10) {
+                                Image(systemName: "server.rack")
+                                    .font(.system(size: 28))
+                                    .foregroundStyle(AITheme.muted)
+                                Text("暂无实例")
+                                    .font(.headline)
+                                Text("添加 SimAdmin 实例后即可开始管理。")
+                                    .font(.subheadline)
+                                    .foregroundStyle(AITheme.muted)
                             }
+                            .frame(maxWidth: .infinity)
+                            .padding(.vertical, 18)
                         }
-                        ForEach(model.rows) { row in
-                            if model.selectionMode {
+                    }
+                    ForEach(model.rows) { row in
+                        if model.selectionMode {
+                            instanceCard(row)
+                        } else {
+                            NavigationLink {
+                                InstanceDetailView(instance: row.instance)
+                            } label: {
                                 instanceCard(row)
-                            } else {
-                                NavigationLink {
-                                    InstanceDetailView(instance: row.instance)
-                                } label: {
-                                    instanceCard(row)
-                                }
-                                .buttonStyle(.plain)
                             }
+                            .buttonStyle(.plain)
                         }
                     }
-                    .padding(16)
                 }
+                .padding(16)
             }
-            .navigationTitle("节点总览")
-            .toolbar {
-                ToolbarItemGroup(placement: .primaryAction) {
-                    Button {
-                        model.selectionMode.toggle()
-                        model.selectedIDs.removeAll()
-                    } label: {
-                        Label("批量选择", systemImage: model.selectionMode ? "xmark" : "checklist")
-                    }
-                    .buttonStyle(AIButtonStyle(kind: .secondary, size: .regular))
+        }
+        .navigationTitle("节点总览")
+        .toolbar {
+            ToolbarItemGroup(placement: .primaryAction) {
+                Button {
+                    model.selectionMode.toggle()
+                    model.selectedIDs.removeAll()
+                } label: {
+                    Label(model.selectionMode ? "完成" : "批量选择", systemImage: model.selectionMode ? "xmark" : "checklist")
+                }
+                .buttonStyle(AIButtonStyle(kind: .secondary, size: .regular))
 
-                    Button {
-                        model.showingForm = true
-                    } label: {
-                        Label("添加实例", systemImage: "plus")
-                    }
-                    .buttonStyle(AIButtonStyle(kind: .primary, size: .regular))
+                Button {
+                    model.showingForm = true
+                } label: {
+                    Label("添加实例", systemImage: "plus")
                 }
+                .buttonStyle(AIButtonStyle(kind: .primary, size: .regular))
             }
-            .refreshable {
-                await model.refresh()
-            }
-            .task {
-                await model.refresh()
-            }
-            .sheet(isPresented: $model.showingForm) {
-                InstanceFormView(model: model)
+        }
+        .confirmationDialog(
+            "删除已选实例？登录信息也会一并清除。",
+            isPresented: $showsDeleteDialog,
+            titleVisibility: .visible
+        ) {
+            Button("删除 \(model.selectedIDs.count) 个实例", role: .destructive) {
+                Task { await model.deleteSelected() }
             }
+            Button("取消", role: .cancel) {}
+        }
+        .refreshable {
+            await model.refresh()
+        }
+        .task {
+            await model.refresh()
+        }
+        .sheet(isPresented: $model.showingForm) {
+            InstanceFormView(model: model)
         }
     }
 
     private var searchField: some View {
-        HStack(spacing: 8) {
-            Image(systemName: "magnifyingglass")
-                .foregroundStyle(AITheme.muted)
-            TextField("搜索实例或地址", text: $model.searchText)
-                .textFieldStyle(.plain)
-                .onSubmit {
-                    Task { await model.refresh() }
-                }
+        AISearchField("搜索实例或地址", text: $model.searchText) {
+            Task { await model.refresh() }
         }
-        .padding(.horizontal, 14)
-        .frame(minHeight: AITheme.buttonHeight)
-        .background(AITheme.surface)
-        .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
-        .overlay {
-            RoundedRectangle(cornerRadius: AITheme.buttonRadius)
-                .strokeBorder(AITheme.line)
+    }
+
+    private var selectionBar: some View {
+        AICard {
+            HStack(spacing: 10) {
+                Button {
+                    if model.selectedIDs.count == model.rows.count {
+                        model.selectedIDs.removeAll()
+                    } else {
+                        model.selectedIDs = Set(model.rows.map(\.id))
+                    }
+                } label: {
+                    Label(
+                        model.selectedIDs.count == model.rows.count ? "取消全选" : "全选",
+                        systemImage: "checkmark.circle"
+                    )
+                }
+                .buttonStyle(AIButtonStyle(kind: .secondary, size: .compact))
+
+                Spacer()
+
+                Text("已选 \(model.selectedIDs.count)")
+                    .font(.subheadline.weight(.semibold))
+                    .foregroundStyle(AITheme.muted)
+
+                Button {
+                    showsDeleteDialog = true
+                } label: {
+                    Label("删除", systemImage: "trash")
+                }
+                .buttonStyle(AIButtonStyle(kind: .danger, size: .compact))
+                .disabled(model.selectedIDs.isEmpty)
+            }
         }
     }
 
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetViewModel.swift b/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetViewModel.swift
index 5d4a2f4..f5cb838 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetViewModel.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Fleet/FleetViewModel.swift
@@ -79,6 +79,10 @@ final class FleetViewModel: ObservableObject {
         await refresh()
     }
 
+    func deleteSelected() async {
+        await delete(Array(selectedIDs))
+    }
+
     private func applyProbe(_ id: UUID, _ result: ConnectionResult?) {
         guard let index = rows.firstIndex(where: { $0.id == id }) else { return }
         rows[index].status = result?.status ?? .unknown
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Fleet/InstanceFormView.swift b/apps/ios/Sources/MultiSimAdmin/Features/Fleet/InstanceFormView.swift
index f657046..f8a4f0a 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Fleet/InstanceFormView.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Fleet/InstanceFormView.swift
@@ -9,6 +9,11 @@ struct InstanceFormView: View {
     @State private var password = ""
     @State private var validationMessage: String?
 
+    private var canSave: Bool {
+        !name.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
+            && !originText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
+    }
+
     var body: some View {
         NavigationStack {
             ZStack {
@@ -20,19 +25,15 @@ struct InstanceFormView: View {
                                 field("名称", text: $name, placeholder: "Home Node")
                                 field("地址", text: $originText, placeholder: "http://192.168.1.10:3000")
                                 field("标签", text: $tagsText, placeholder: "home, primary")
-                                SecureField("实例密码（可选）", text: $password)
-                                    .textContentType(.password)
-                                    .padding(.horizontal, 12)
-                                    .frame(minHeight: 38)
-                                    .background(AITheme.canvas)
-                                    .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
+                                field("实例密码", text: $password, placeholder: "可选，保存到钥匙串", secure: true)
                             }
                         }
                         if let validationMessage {
-                            Text(validationMessage)
-                                .font(.subheadline)
-                                .foregroundStyle(AITheme.danger)
-                                .frame(maxWidth: .infinity, alignment: .leading)
+                            AICard {
+                                Label(validationMessage, systemImage: "exclamationmark.triangle")
+                                    .font(.subheadline)
+                                    .foregroundStyle(AITheme.danger)
+                            }
                         }
                     }
                     .padding(16)
@@ -49,26 +50,35 @@ struct InstanceFormView: View {
                         save()
                     }
                     .buttonStyle(AIButtonStyle(kind: .primary, size: .regular))
+                    .disabled(!canSave)
                 }
             }
         }
     }
 
-    private func field(_ title: String, text: Binding<String>, placeholder: String) -> some View {
+    private func field(
+        _ title: String,
+        text: Binding<String>,
+        placeholder: String,
+        secure: Bool = false
+    ) -> some View {
         VStack(alignment: .leading, spacing: 6) {
             Text(title)
                 .font(.subheadline.weight(.semibold))
                 .foregroundStyle(AITheme.ink)
-            TextField(placeholder, text: text)
-                .textFieldStyle(.plain)
-                .padding(.horizontal, 12)
-                .frame(minHeight: 38)
-                .background(AITheme.canvas)
-                .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
+            if secure {
+                SecureField(placeholder, text: text)
+                    .textFieldStyle(AIFieldStyle())
+                    .textContentType(.password)
+            } else {
+                TextField(placeholder, text: text)
+                    .textFieldStyle(AIFieldStyle())
+            }
         }
     }
 
     private func save() {
+        let normalizedName = name.trimmingCharacters(in: .whitespacesAndNewlines)
         guard let origin = URL(string: originText.trimmingCharacters(in: .whitespacesAndNewlines)),
               origin.scheme == "http" || origin.scheme == "https",
               origin.host != nil
@@ -81,7 +91,7 @@ struct InstanceFormView: View {
             .map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }
             .filter { !$0.isEmpty }
         let input = InstanceInput(
-            name: name,
+            name: normalizedName,
             origin: origin,
             tags: tags,
             password: password.isEmpty ? nil : password
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Logs/LogsView.swift b/apps/ios/Sources/MultiSimAdmin/Features/Logs/LogsView.swift
index 0486cb1..b2602e6 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Logs/LogsView.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Logs/LogsView.swift
@@ -9,6 +9,7 @@ struct LogsView: View {
 
     @StateObject private var model: LogsViewModel
     @State private var tab: Tab = .runtime
+    @State private var showsPruneDialog = false
 
     init(model: LogsViewModel? = nil) {
         _model = StateObject(wrappedValue: model ?? DefaultContainer.makeLogsModel())
@@ -54,10 +55,22 @@ struct LogsView: View {
                 } label: {
                     Label("刷新", systemImage: "arrow.clockwise")
                 }
-                .buttonStyle(AIButtonStyle(kind: .primary, size: .regular))
+                .buttonStyle(AIButtonStyle(kind: .secondary, size: .regular))
                 .disabled(model.isLoading)
             }
         }
+        .confirmationDialog(
+            "清理 7 天前的连接日志？操作不可恢复。",
+            isPresented: $showsPruneDialog,
+            titleVisibility: .visible
+        ) {
+            Button("清理连接日志", role: .destructive) {
+                Task {
+                    _ = await model.pruneConnections(olderThanDays: 7)
+                }
+            }
+            Button("取消", role: .cancel) {}
+        }
         .refreshable {
             await model.refresh()
         }
@@ -81,16 +94,7 @@ struct LogsView: View {
 
     private var filterBar: some View {
         VStack(spacing: 10) {
-            TextField("搜索日志、错误码或实例", text: $model.searchText)
-                .textFieldStyle(.plain)
-                .padding(.horizontal, 12)
-                .frame(minHeight: AITheme.buttonHeight)
-                .background(AITheme.canvas)
-                .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
-                .overlay {
-                    RoundedRectangle(cornerRadius: AITheme.buttonRadius)
-                        .strokeBorder(AITheme.line)
-                }
+            AISearchField("搜索日志、错误码或实例", text: $model.searchText)
 
             Picker("实例", selection: $model.selectedInstanceID) {
                 Text("全部实例").tag(Optional<UUID>.none)
@@ -168,9 +172,7 @@ struct LogsView: View {
                 HStack {
                     sectionTitle("连接探测记录", detail: "\(model.filteredConnections.count) 条")
                     Button {
-                        Task {
-                            _ = await model.pruneConnections(olderThanDays: 7)
-                        }
+                        showsPruneDialog = true
                     } label: {
                         Label("清理", systemImage: "trash")
                     }
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Messages/MessagesView.swift b/apps/ios/Sources/MultiSimAdmin/Features/Messages/MessagesView.swift
index f41f931..147a441 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Messages/MessagesView.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Messages/MessagesView.swift
@@ -2,6 +2,7 @@ import SwiftUI
 
 struct MessagesView: View {
     @StateObject private var model: MessagesViewModel
+    @State private var pendingDeleteMessage: SMSMessage?
 
     init(model: MessagesViewModel? = nil) {
         _model = StateObject(wrappedValue: model ?? DefaultContainer.makeMessagesModel())
@@ -54,6 +55,20 @@ struct MessagesView: View {
                 .buttonStyle(AIButtonStyle(kind: .primary, size: .regular))
             }
         }
+        .confirmationDialog(
+            "删除这条消息？操作不可恢复。",
+            isPresented: Binding(
+                get: { pendingDeleteMessage != nil },
+                set: { if !$0 { pendingDeleteMessage = nil } }
+            ),
+            titleVisibility: .visible
+        ) {
+            Button("删除消息", role: .destructive) {
+                guard let message = pendingDeleteMessage else { return }
+                Task { await model.delete(message) }
+            }
+            Button("取消", role: .cancel) {}
+        }
         .refreshable {
             await model.refresh()
         }
@@ -83,16 +98,7 @@ struct MessagesView: View {
                 }
                 .pickerStyle(.menu)
 
-                TextField("搜索号码或内容", text: $model.searchText)
-                    .textFieldStyle(.plain)
-                    .padding(.horizontal, 12)
-                    .frame(minHeight: AITheme.buttonHeight)
-                    .background(AITheme.canvas)
-                    .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
-                    .overlay {
-                        RoundedRectangle(cornerRadius: AITheme.buttonRadius)
-                            .strokeBorder(AITheme.line)
-                    }
+                AISearchField("搜索号码或内容", text: $model.searchText)
             }
         }
     }
@@ -115,7 +121,7 @@ struct MessagesView: View {
                         .foregroundStyle(AITheme.muted)
                     Spacer()
                     Button("删除") {
-                        Task { await model.delete(message) }
+                        pendingDeleteMessage = message
                     }
                     .buttonStyle(AIButtonStyle(kind: .danger, size: .compact))
                 }
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Messages/SendMessageFormView.swift b/apps/ios/Sources/MultiSimAdmin/Features/Messages/SendMessageFormView.swift
index 3e35a59..c3c0455 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Messages/SendMessageFormView.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Messages/SendMessageFormView.swift
@@ -7,6 +7,18 @@ struct SendMessageFormView: View {
     @State private var content = ""
     @State private var validationMessage: String?
 
+    private var trimmedPhoneNumber: String {
+        phoneNumber.trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
+    private var trimmedContent: String {
+        content.trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
+    private var canSend: Bool {
+        !trimmedPhoneNumber.isEmpty && !trimmedContent.isEmpty
+    }
+
     var body: some View {
         NavigationStack {
             ZStack {
@@ -26,16 +38,19 @@ struct SendMessageFormView: View {
                                 .pickerStyle(.menu)
 
                                 TextField("收件号码", text: $phoneNumber)
+                                    .textFieldStyle(AIFieldStyle())
+
+                                TextField("消息内容", text: $content, axis: .vertical)
+                                    .textFieldStyle(.plain)
                                     .padding(.horizontal, 12)
                                     .frame(minHeight: AITheme.buttonHeight)
                                     .background(AITheme.canvas)
                                     .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
-
-                                TextField("消息内容", text: $content, axis: .vertical)
+                                    .overlay {
+                                        RoundedRectangle(cornerRadius: AITheme.buttonRadius)
+                                            .strokeBorder(AITheme.line)
+                                    }
                                     .lineLimit(4...8)
-                                    .padding(12)
-                                    .background(AITheme.canvas)
-                                    .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
                             }
                         }
                         if let validationMessage {
@@ -57,6 +72,7 @@ struct SendMessageFormView: View {
                 ToolbarItem(placement: .confirmationAction) {
                     Button("发送") { send() }
                         .buttonStyle(AIButtonStyle(kind: .primary, size: .regular))
+                        .disabled(!canSend)
                 }
             }
         }
@@ -65,7 +81,7 @@ struct SendMessageFormView: View {
     private func send() {
         Task {
             do {
-                try await model.send(phoneNumber: phoneNumber, content: content)
+                try await model.send(phoneNumber: trimmedPhoneNumber, content: trimmedContent)
                 phoneNumber = ""
                 content = ""
                 validationMessage = nil
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Notifications/NotificationsView.swift b/apps/ios/Sources/MultiSimAdmin/Features/Notifications/NotificationsView.swift
index 3e560d3..da1008d 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Notifications/NotificationsView.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Notifications/NotificationsView.swift
@@ -2,6 +2,7 @@ import SwiftUI
 
 struct NotificationsView: View {
     @StateObject private var model: NotificationsViewModel
+    @State private var pendingDeleteQueueID: String?
 
     init(model: NotificationsViewModel? = nil) {
         _model = StateObject(wrappedValue: model ?? DefaultContainer.makeNotificationsModel())
@@ -58,6 +59,24 @@ struct NotificationsView: View {
                 .disabled(model.isLoading)
             }
         }
+        .confirmationDialog(
+            "删除这条通知队列记录？操作不可恢复。",
+            isPresented: Binding(
+                get: { pendingDeleteQueueID != nil },
+                set: { if !$0 { pendingDeleteQueueID = nil } }
+            ),
+            titleVisibility: .visible
+        ) {
+            Button("删除队列记录", role: .destructive) {
+                guard let id = pendingDeleteQueueID else { return }
+                Task {
+                    if let item = model.overview?.queue.items.first(where: { $0.id == id }) {
+                        await model.deleteQueue(item)
+                    }
+                }
+            }
+            Button("取消", role: .cancel) {}
+        }
         .refreshable {
             await model.refresh()
         }
@@ -189,7 +208,7 @@ struct NotificationsView: View {
                                 .disabled(model.busyQueueID == item.id)
 
                                 Button {
-                                    Task { await model.deleteQueue(item) }
+                                    pendingDeleteQueueID = item.id
                                 } label: {
                                     Label("删除", systemImage: "trash")
                                 }
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsView.swift b/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsView.swift
index 5ad826d..e3170ab 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsView.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsView.swift
@@ -31,7 +31,6 @@ struct SettingsView: View {
                     runtimeCard
                     storageCard
                     securityCard
-                    backgroundCard
                 }
                 .padding(16)
             }
@@ -71,10 +70,8 @@ struct SettingsView: View {
             VStack(alignment: .leading, spacing: 12) {
                 sectionTitle("应用信息", systemImage: "info.circle")
                 if let runtime = model.runtime {
-                    infoRow("名称", runtime.appName)
                     infoRow("版本", "\(runtime.marketingVersion) (\(runtime.buildVersion))")
-                    infoRow("标识符", AppMetadata.bundleIdentifier)
-                    infoRow("设备", "\(runtime.platform) · \(runtime.deviceModel)")
+                    infoRow("设备", runtime.deviceModel)
                 } else {
                     Text("正在读取应用信息…")
                         .font(.subheadline)
@@ -88,15 +85,15 @@ struct SettingsView: View {
         AICard {
             VStack(alignment: .leading, spacing: 12) {
                 sectionTitle("本地数据", systemImage: "externaldrive")
-                infoRow("实例配置", "App Documents/instances.json")
-                infoRow("日志中心", "App Documents/log-center.json")
-                infoRow("日志数量", model.storageLabel)
+                infoRow("存储位置", "仅保存在本机应用沙盒")
+                infoRow("当前占用", model.storageLabel)
                 Button {
                     showsClearDialog = true
                 } label: {
                     Label("清除运行日志", systemImage: "trash")
                 }
-                .buttonStyle(AIButtonStyle(kind: .danger, size: .regular))
+                .frame(maxWidth: .infinity)
+                .buttonStyle(AIButtonStyle(kind: .danger, size: .large))
             }
         }
     }
@@ -107,25 +104,6 @@ struct SettingsView: View {
                 sectionTitle("安全与登录", systemImage: "lock.shield")
                 infoRow("实例密码", "保存在 iOS 钥匙串")
                 infoRow("登录会话", "仅保存在内存")
-                infoRow("访问密码", "已停用")
-            }
-        }
-    }
-
-    private var backgroundCard: some View {
-        AICard {
-            VStack(alignment: .leading, spacing: 12) {
-                sectionTitle("后台能力", systemImage: "clock.badge.exclamationmark")
-                Text(model.serverCapabilitiesNotice)
-                    .font(.subheadline)
-                    .foregroundStyle(AITheme.muted)
-                if model.serverCapabilities.isEmpty {
-                    AITag("无后台任务", tint: AITheme.muted)
-                } else {
-                    ForEach(model.serverCapabilities) { capability in
-                        infoRow(capability.name, capability.detail)
-                    }
-                }
             }
         }
     }
diff --git a/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsViewModel.swift b/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsViewModel.swift
index 3e95903..6952be1 100644
--- a/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsViewModel.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Features/Settings/SettingsViewModel.swift
@@ -9,19 +9,11 @@ struct SettingsRuntime: Equatable {
     let deviceModel: String
 }
 
-struct ServerCapability: Equatable, Identifiable {
-    let id: String
-    let name: String
-    let detail: String
-}
-
 @MainActor
 final class SettingsViewModel: ObservableObject {
     @Published private(set) var runtime: SettingsRuntime?
-    @Published private(set) var serverCapabilities: [ServerCapability] = []
     @Published private(set) var isLoading = false
     @Published var storageLabel = "--"
-    @Published var serverCapabilitiesNotice = ""
     @Published var notice: String?
     @Published var errorMessage: String?
 
@@ -42,8 +34,6 @@ final class SettingsViewModel: ObservableObject {
             platform: "iOS",
             deviceModel: Self.deviceModel()
         )
-        serverCapabilities = []
-        serverCapabilitiesNotice = "定时任务与后台刷新已在 iOS 版停用。"
         await loadStorageLabel()
 
         isLoading = false
diff --git a/apps/ios/Sources/MultiSimAdmin/MultiSimAdminApp.swift b/apps/ios/Sources/MultiSimAdmin/MultiSimAdminApp.swift
index 1dee336..73c27b1 100644
--- a/apps/ios/Sources/MultiSimAdmin/MultiSimAdminApp.swift
+++ b/apps/ios/Sources/MultiSimAdmin/MultiSimAdminApp.swift
@@ -5,26 +5,36 @@ struct MultiSimAdminApp: App {
     var body: some Scene {
         WindowGroup {
             TabView {
-                FleetView()
-                    .tabItem {
-                        Label("节点", systemImage: "server.rack")
-                    }
-                MessagesView()
-                    .tabItem {
-                        Label("消息", systemImage: "message")
-                    }
-                NotificationsView()
-                    .tabItem {
-                        Label("通知", systemImage: "bell")
-                    }
-                LogsView()
-                    .tabItem {
-                        Label("日志", systemImage: "doc.text")
-                    }
-                SettingsView()
-                    .tabItem {
-                        Label("设置", systemImage: "gearshape")
-                    }
+                NavigationStack {
+                    FleetView()
+                }
+                .tabItem {
+                    Label("节点", systemImage: "server.rack")
+                }
+                NavigationStack {
+                    MessagesView()
+                }
+                .tabItem {
+                    Label("消息", systemImage: "message")
+                }
+                NavigationStack {
+                    NotificationsView()
+                }
+                .tabItem {
+                    Label("通知", systemImage: "bell")
+                }
+                NavigationStack {
+                    LogsView()
+                }
+                .tabItem {
+                    Label("日志", systemImage: "doc.text")
+                }
+                NavigationStack {
+                    SettingsView()
+                }
+                .tabItem {
+                    Label("设置", systemImage: "gearshape")
+                }
             }
             .tint(AITheme.primary)
         }
diff --git a/apps/ios/Sources/MultiSimAdmin/Resources/Info.plist b/apps/ios/Sources/MultiSimAdmin/Resources/Info.plist
index 292d904..d71dde0 100644
--- a/apps/ios/Sources/MultiSimAdmin/Resources/Info.plist
+++ b/apps/ios/Sources/MultiSimAdmin/Resources/Info.plist
@@ -12,6 +12,7 @@
     <key>CFBundleShortVersionString</key><string>0.1.0</string>
     <key>CFBundleVersion</key><string>1</string>
     <key>LSRequiresIPhoneOS</key><true/>
+    <key>MinimumOSVersion</key><string>16.0</string>
     <key>NSAppTransportSecurity</key>
     <dict>
         <key>NSAllowsArbitraryLoads</key><true/>
diff --git a/apps/ios/Sources/MultiSimAdmin/Services/DefaultContainer.swift b/apps/ios/Sources/MultiSimAdmin/Services/DefaultContainer.swift
index 3a3ee5d..2f193b5 100644
--- a/apps/ios/Sources/MultiSimAdmin/Services/DefaultContainer.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Services/DefaultContainer.swift
@@ -1,6 +1,10 @@
 import Foundation
 
 enum DefaultContainer {
+    private static let logStore: any LogStore = FileLogStore(
+        location: documentFileURL("log-center.json")
+    )
+
     static func documentFileURL(_ name: String) -> URL {
         let directory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
         return directory.appendingPathComponent(name)
@@ -41,7 +45,7 @@ enum DefaultContainer {
 
     @MainActor
     static func makeLogsModel() -> LogsViewModel {
-        let store = FileLogStore(location: documentFileURL("log-center.json"))
+        let store = logStore
         return LogsViewModel(
             repository: FileInstanceRepository(location: documentFileURL("instances.json")),
             service: LogCenterService(
@@ -56,7 +60,7 @@ enum DefaultContainer {
 
     @MainActor
     static func makeSettingsModel() -> SettingsViewModel {
-        SettingsViewModel(store: FileLogStore(location: documentFileURL("log-center.json")))
+        SettingsViewModel(store: logStore)
     }
 
     @MainActor
diff --git a/apps/ios/Sources/MultiSimAdmin/Theme/AIButtonStyle.swift b/apps/ios/Sources/MultiSimAdmin/Theme/AIButtonStyle.swift
index 5930c5e..a9945de 100644
--- a/apps/ios/Sources/MultiSimAdmin/Theme/AIButtonStyle.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Theme/AIButtonStyle.swift
@@ -6,18 +6,22 @@ public struct AIButtonStyle: ButtonStyle {
         case secondary
         case danger
 
-        var foregroundColor: Color {
+        var foregroundColor: Color { foregroundColor(isEnabled: true) }
+
+        var backgroundColor: Color { backgroundColor(isEnabled: true) }
+
+        func foregroundColor(isEnabled: Bool) -> Color {
             switch self {
-            case .primary, .danger: return .white
-            case .secondary: return AITheme.ink
+            case .primary, .danger: return .white.opacity(isEnabled ? 1 : 0.72)
+            case .secondary: return isEnabled ? AITheme.ink : AITheme.muted
             }
         }
 
-        var backgroundColor: Color {
+        func backgroundColor(isEnabled: Bool) -> Color {
             switch self {
-            case .primary: return AITheme.primary
-            case .secondary: return AITheme.surface
-            case .danger: return AITheme.danger
+            case .primary: return isEnabled ? AITheme.primary : AITheme.primary.opacity(0.35)
+            case .secondary: return isEnabled ? AITheme.surface : AITheme.canvas
+            case .danger: return isEnabled ? AITheme.danger : AITheme.danger.opacity(0.30)
             }
         }
     }
@@ -30,6 +34,7 @@ public struct AIButtonStyle: ButtonStyle {
 
     private let kind: Kind
     private let size: Size
+    @Environment(\.isEnabled) private var isEnabled
 
     public init(kind: Kind = .secondary, size: Size = .regular) {
         self.kind = kind
@@ -43,17 +48,25 @@ public struct AIButtonStyle: ButtonStyle {
         case .regular: AITheme.buttonHeight
         }
 
-        configuration.label
-            .font(.system(size: 15, weight: .semibold))
-            .foregroundStyle(kind.foregroundColor)
-            .frame(minWidth: 44, minHeight: height)
-            .padding(.horizontal, 14)
-            .background(kind.backgroundColor)
-            .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
-            .overlay {
-                RoundedRectangle(cornerRadius: AITheme.buttonRadius)
-                    .strokeBorder(kind == .secondary ? AITheme.line : .clear)
-            }
+            configuration.label
+                .font(.system(size: 16, weight: .semibold))
+                .foregroundStyle(kind.foregroundColor(isEnabled: isEnabled))
+                .frame(minWidth: minimumWidth, minHeight: height)
+                .padding(.horizontal, kind == .secondary ? 12 : 14)
+                .background(kind.backgroundColor(isEnabled: isEnabled))
+                .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
+                .overlay {
+                    RoundedRectangle(cornerRadius: AITheme.buttonRadius)
+                        .strokeBorder(kind == .secondary || !isEnabled ? AITheme.line : .clear)
+                }
             .opacity(configuration.isPressed ? 0.78 : 1)
     }
+
+    private var minimumWidth: CGFloat {
+        switch size {
+        case .compact: return AITheme.compactButtonMinWidth
+        case .regular: return AITheme.regularButtonMinWidth
+        case .large: return 92
+        }
+    }
 }
diff --git a/apps/ios/Sources/MultiSimAdmin/Theme/AICard.swift b/apps/ios/Sources/MultiSimAdmin/Theme/AICard.swift
index 2e73e38..2907e0a 100644
--- a/apps/ios/Sources/MultiSimAdmin/Theme/AICard.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Theme/AICard.swift
@@ -39,6 +39,58 @@ public struct AITag: View {
     }
 }
 
+public struct AIFieldStyle: TextFieldStyle {
+    public init() {}
+
+    public func _body(configuration: TextField<Self._Label>) -> some View {
+        configuration
+            .padding(.horizontal, 12)
+            .frame(minHeight: AITheme.buttonHeight)
+            .background(AITheme.canvas)
+            .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
+            .overlay {
+                RoundedRectangle(cornerRadius: AITheme.buttonRadius)
+                    .strokeBorder(AITheme.line)
+            }
+    }
+}
+
+public struct AISearchField: View {
+    private let placeholder: String
+    @Binding private var text: String
+    private var onSubmit: (() -> Void)?
+
+    public init(
+        _ placeholder: String,
+        text: Binding<String>,
+        onSubmit: (() -> Void)? = nil
+    ) {
+        self.placeholder = placeholder
+        self._text = text
+        self.onSubmit = onSubmit
+    }
+
+    public var body: some View {
+        HStack(spacing: 8) {
+            Image(systemName: "magnifyingglass")
+                .foregroundStyle(AITheme.muted)
+            TextField(placeholder, text: $text)
+                .textFieldStyle(.plain)
+                .onSubmit {
+                    onSubmit?()
+                }
+        }
+        .padding(.horizontal, 12)
+        .frame(minHeight: AITheme.buttonHeight)
+        .background(AITheme.surface)
+        .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
+        .overlay {
+            RoundedRectangle(cornerRadius: AITheme.buttonRadius)
+                .strokeBorder(AITheme.line)
+        }
+    }
+}
+
 public struct AIBrandBar: View {
     public init() {}
 
diff --git a/apps/ios/Sources/MultiSimAdmin/Theme/AITheme.swift b/apps/ios/Sources/MultiSimAdmin/Theme/AITheme.swift
index a2b8711..3876eb4 100644
--- a/apps/ios/Sources/MultiSimAdmin/Theme/AITheme.swift
+++ b/apps/ios/Sources/MultiSimAdmin/Theme/AITheme.swift
@@ -12,10 +12,12 @@ public enum AITheme {
     public static let warning = Color(red: 0.722, green: 0.471, blue: 0.067)
     public static let success = Color(red: 0.082, green: 0.584, blue: 0.439)
 
-    public static let buttonHeight: CGFloat = 38
-    public static let compactButtonHeight: CGFloat = 34
-    public static let largeButtonHeight: CGFloat = 42
-    public static let iconButtonSize: CGFloat = 40
-    public static let buttonRadius: CGFloat = 10
-    public static let cardRadius: CGFloat = 14
+    public static let buttonHeight: CGFloat = 44
+    public static let compactButtonHeight: CGFloat = 40
+    public static let largeButtonHeight: CGFloat = 50
+    public static let iconButtonSize: CGFloat = 44
+    public static let buttonRadius: CGFloat = 12
+    public static let cardRadius: CGFloat = 16
+    public static let compactButtonMinWidth: CGFloat = 58
+    public static let regularButtonMinWidth: CGFloat = 76
 }
diff --git a/apps/ios/Tests/MultiSimAdminTests/AIThemeTests.swift b/apps/ios/Tests/MultiSimAdminTests/AIThemeTests.swift
index 6985c85..0144a9f 100644
--- a/apps/ios/Tests/MultiSimAdminTests/AIThemeTests.swift
+++ b/apps/ios/Tests/MultiSimAdminTests/AIThemeTests.swift
@@ -4,12 +4,12 @@ import XCTest
 @testable import MultiSimAdmin
 
 final class AIThemeTests: XCTestCase {
-    func testControlDimensionsMatchWebScale() {
-        XCTAssertEqual(AITheme.buttonHeight, 38, accuracy: 0.1)
-        XCTAssertEqual(AITheme.compactButtonHeight, 34, accuracy: 0.1)
-        XCTAssertEqual(AITheme.largeButtonHeight, 42, accuracy: 0.1)
-        XCTAssertEqual(AITheme.buttonRadius, 10, accuracy: 0.1)
-        XCTAssertEqual(AITheme.iconButtonSize, 40, accuracy: 0.1)
+    func testControlDimensionsMatchIOS() {
+        XCTAssertEqual(AITheme.buttonHeight, 44, accuracy: 0.1)
+        XCTAssertEqual(AITheme.compactButtonHeight, 40, accuracy: 0.1)
+        XCTAssertEqual(AITheme.largeButtonHeight, 50, accuracy: 0.1)
+        XCTAssertEqual(AITheme.buttonRadius, 12, accuracy: 0.1)
+        XCTAssertEqual(AITheme.iconButtonSize, 44, accuracy: 0.1)
     }
 
     func testButtonKindsHaveDistinctBaseColors() {
@@ -20,4 +20,23 @@ final class AIThemeTests: XCTestCase {
         ].map(\.backgroundColor)
         XCTAssertEqual(Set(colors).count, 3)
     }
+
+    func testDisabledKindsUseReducedButVisibleRendering() {
+        let disabledKinds = [
+            AIButtonStyle.Kind.primary,
+            .secondary,
+            .danger
+        ]
+        let disabledColors = disabledKinds.map { $0.backgroundColor(isEnabled: false) }
+
+        XCTAssertEqual(Set(disabledColors).count, disabledKinds.count)
+        XCTAssertEqual(
+            disabledKinds.map { $0.foregroundColor(isEnabled: false) },
+            [
+                .white.opacity(0.72),
+                AITheme.muted,
+                .white.opacity(0.72)
+            ]
+        )
+    }
 }
diff --git a/apps/ios/Tests/MultiSimAdminTests/FleetViewModelTests.swift b/apps/ios/Tests/MultiSimAdminTests/FleetViewModelTests.swift
index 55cf60b..8505306 100644
--- a/apps/ios/Tests/MultiSimAdminTests/FleetViewModelTests.swift
+++ b/apps/ios/Tests/MultiSimAdminTests/FleetViewModelTests.swift
@@ -52,6 +52,36 @@ final class FleetViewModelTests: XCTestCase {
         XCTAssertTrue(model.rows.isEmpty)
         XCTAssertNil(credentials.saved[row.instance.id])
     }
+
+    func testDeleteSelectedClearsSelectionAndCredential() async throws {
+        let repository = MemoryInstanceRepository()
+        let credentials = NoopCredentialStore()
+        let model = FleetViewModel(
+            repository: repository,
+            probe: ConnectionProbe(client: AlwaysOnlineClient()),
+            credentials: credentials
+        )
+        try await model.add(InstanceInput(
+            name: "Selected",
+            origin: URL(string: "http://192.168.1.50:3000")!,
+            password: "pass"
+        ))
+        try await model.add(InstanceInput(
+            name: "Other",
+            origin: URL(string: "http://192.168.1.60:3000")!,
+            password: nil
+        ))
+        let selectedID = model.rows[0].id
+        model.selectionMode = true
+        model.selectedIDs = [selectedID]
+
+        await model.deleteSelected()
+
+        XCTAssertEqual(model.rows.map(\.instance.name), ["Selected"])
+        XCTAssertEqual(credentials.removed, [selectedID])
+        XCTAssertFalse(model.selectionMode)
+        XCTAssertTrue(model.selectedIDs.isEmpty)
+    }
 }
 
 struct AlwaysOnlineClient: SimAdminClientProtocol {
diff --git a/apps/ios/Tests/MultiSimAdminTests/SettingsViewModelTests.swift b/apps/ios/Tests/MultiSimAdminTests/SettingsViewModelTests.swift
index 74e55a5..e72f9ad 100644
--- a/apps/ios/Tests/MultiSimAdminTests/SettingsViewModelTests.swift
+++ b/apps/ios/Tests/MultiSimAdminTests/SettingsViewModelTests.swift
@@ -4,7 +4,7 @@ import XCTest
 
 final class SettingsViewModelTests: XCTestCase {
     @MainActor
-    func testLoadsRuntimeAppAndDisabledServerCapabilities() async throws {
+    func testLoadsRuntimeWithoutServerCapabilities() async throws {
         let store = SettingsMemoryLogStore()
         let model = SettingsViewModel(store: store)
 
@@ -16,8 +16,6 @@ final class SettingsViewModelTests: XCTestCase {
         XCTAssertEqual(model.runtime?.platform, "iOS")
         XCTAssertTrue(model.runtime?.deviceModel.isEmpty == false)
 
-        XCTAssertTrue(model.serverCapabilities.isEmpty)
-        XCTAssertEqual(model.serverCapabilitiesNotice, "定时任务与后台刷新已在 iOS 版停用。")
         XCTAssertNil(model.errorMessage)
     }