feat(ios): W3 UI layer + integration CI + ntfy docs

T-iOS-11: TerminalScreen/KeyBar/TerminalViewModel + KeyByteMap (byte-for-byte keybar.ts, arrows excluded from UIKeyCommand to preserve DECCKM)
T-iOS-12: PairingScreen/VM — confirm-before-network (zero-call assertions), §5.4 four-tier warnings, Host construction per contract ruling
T-iOS-13: SessionListScreen/VM — Tunables-paced polling with leak-free teardown, optimistic kill+rollback, pending via overlay (LiveSessionInfo has no pending field)
T-iOS-14: GateBanner/PlanGateSheet/AwayDigestView/GateViewModel — three-way mapping from SessionCore Affordance single source, tap-epoch guard, per-epoch haptics
T-iOS-16: IntegrationTests vs real Node server (10 tests: origin guards, mirror, kill-close vs exit-frame differential, 16MiB+ESC/C0 replay) + ios.yml own-sources coverage gate (red-once demoed)
T-iOS-17: ios/README.md ntfy chapter (read-only verification, file:line cites)
Verified: 224 unit + 10 integration tests green; 5/5 semantic spot-checks; zero Owns violations

ios/App/WebTerm/Components/AwayDigestView.swift

@@ -0,0 +1,111 @@
+import SessionCore
+import SwiftUI
+import WireProtocol
+
+/// T-iOS-14 · "What happened while I was away" banner rendered above the
+/// terminal after a reconnect. Render-only: `GateViewModel` owns the state —
+/// an ALL-ZERO digest never reaches this view (the VM keeps `digest` nil),
+/// the collapsed row auto-fades after `Tunables.digestFadeDelay`, and manual
+/// expansion (which cancels the fade) reveals the recent entries.
+struct AwayDigestView: View {
+    let digest: AwayDigest
+    let isExpanded: Bool
+    let onExpand: () -> Void
+    let onDismiss: () -> Void
+
+    private enum Metrics {
+        static let spacing: CGFloat = 8
+        static let rowSpacing: CGFloat = 4
+        static let horizontalPadding: CGFloat = 14
+        static let verticalPadding: CGFloat = 10
+        static let cornerRadius: CGFloat = 12
+        /// Recent entries shown when expanded (newest kept — the engine's
+        /// digest is uncapped, the banner must not be).
+        static let maxRecentRows = 12
+    }
+
+    private enum Copy {
+        static let prefix = "离开期间："
+        static let separator = " · "
+        static let expandTitle = "展开明细"
+        static let dismissTitle = "关闭摘要"
+    }
+
+    /// Summary line: non-zero parts only, joined web-statusline style. A
+    /// non-empty digest whose counted signals are all zero (e.g. only `user`
+    /// events) falls back to a plain activity count so the row is never blank.
+    static func summary(for digest: AwayDigest) -> String {
+        let parts = [
+            digest.toolRuns > 0 ? "工具调用 \(digest.toolRuns) 次" : nil,
+            digest.waitingCount > 0 ? "等待审批 \(digest.waitingCount) 次" : nil,
+            digest.sawDone ? "已完成" : nil,
+            digest.sawStuck ? "曾卡住" : nil,
+        ].compactMap { $0 }
+        guard !parts.isEmpty else {
+            return "\(Copy.prefix)活动 \(digest.recent.count) 条"
+        }
+        return Copy.prefix + parts.joined(separator: Copy.separator)
+    }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: Metrics.spacing) {
+            summaryRow
+            if isExpanded {
+                recentRows
+            }
+        }
+        .padding(.horizontal, Metrics.horizontalPadding)
+        .padding(.vertical, Metrics.verticalPadding)
+        .background(.thinMaterial, in: RoundedRectangle(cornerRadius: Metrics.cornerRadius))
+        .accessibilityElement(children: .contain)
+    }
+
+    private var summaryRow: some View {
+        HStack(spacing: Metrics.spacing) {
+            Image(systemName: "clock.arrow.circlepath")
+                .foregroundStyle(.secondary)
+            Text(Self.summary(for: digest))
+                .font(.footnote.weight(.medium))
+                .lineLimit(1)
+            Spacer(minLength: Metrics.spacing)
+            if !isExpanded {
+                Button(Copy.expandTitle, systemImage: "chevron.down", action: onExpand)
+                    .labelStyle(.iconOnly)
+            }
+            Button(Copy.dismissTitle, systemImage: "xmark", action: onDismiss)
+                .labelStyle(.iconOnly)
+        }
+        .buttonStyle(.borderless)
+        .font(.footnote)
+    }
+
+    /// Newest `maxRecentRows` entries, oldest→newest. Server text (`label`) is
+    /// untrusted display input — rendered as plain Text only.
+    private var recentRows: some View {
+        VStack(alignment: .leading, spacing: Metrics.rowSpacing) {
+            ForEach(
+                Array(digest.recent.suffix(Metrics.maxRecentRows).enumerated()),
+                id: \.offset
+            ) { _, event in
+                recentRow(event)
+            }
+        }
+    }
+
+    private func recentRow(_ event: TimelineEvent) -> some View {
+        HStack(spacing: Metrics.spacing) {
+            Text(Self.time(of: event))
+                .font(.caption2.monospacedDigit())
+                .foregroundStyle(.secondary)
+            Text(event.label)
+                .font(.caption)
+                .lineLimit(1)
+        }
+    }
+
+    private static func time(of event: TimelineEvent) -> String {
+        let millisecondsPerSecond = 1_000.0
+        let date = Date(timeIntervalSince1970: Double(event.at) / millisecondsPerSecond)
+        return date.formatted(date: .omitted, time: .shortened)
+    }
+}

ios/App/WebTerm/Components/GateBanner.swift

@@ -0,0 +1,86 @@
+import SessionCore
+import SwiftUI
+
+/// Copy + wire pairing for one gate button — the SINGLE label source for both
+/// gate surfaces (`GateBanner`, `PlanGateSheet`). Labels mirror
+/// public/tabs.ts:334-350 byte-for-byte; the affordance→ClientMessage mapping
+/// itself is frozen in SessionCore (`GateState.Affordance.clientMessage`).
+struct GateChoiceSpec: Equatable {
+    let label: String
+    let affordance: GateState.Affordance
+
+    /// Ordered button set for `gate` (tool → two, plan → three), driven by the
+    /// frozen `GateState.affordances` list.
+    static func specs(for gate: GateState) -> [GateChoiceSpec] {
+        gate.affordances.map { GateChoiceSpec(label: label(for: $0), affordance: $0) }
+    }
+
+    static func label(for affordance: GateState.Affordance) -> String {
+        switch affordance {
+        case .approveAuto: return "✓ Approve + Auto"
+        case .approveReview: return "✓ Approve + Review"
+        case .keepPlanning: return "✎ Keep Planning"
+        case .approve: return "✓ Approve"
+        case .reject: return "✗ Reject"
+        }
+    }
+}
+
+/// T-iOS-14 · Two-button banner for an ordinary TOOL gate (plan gates get the
+/// three-way `PlanGateSheet`). Render-only: state lives in `GateViewModel`.
+/// Every tap reports the affordance PLUS the epoch of the gate THIS banner
+/// rendered — the VM drops stale taps (first-line guard); wiring into
+/// TerminalScreen is T-iOS-15.
+struct GateBanner: View {
+    let gate: GateState
+    let onDecide: (GateState.Affordance, Int) -> Void
+
+    private enum Metrics {
+        static let spacing: CGFloat = 8
+        static let horizontalPadding: CGFloat = 14
+        static let verticalPadding: CGFloat = 10
+        static let cornerRadius: CGFloat = 12
+        static let messageLineLimit = 2
+    }
+
+    /// Banner headline, mirror of public/tabs.ts:329:
+    /// `Claude wants to use ${pendingTool ?? 'a tool'}`. `detail` is
+    /// server-supplied display text (untrusted) — rendered as plain Text only.
+    static func message(for gate: GateState) -> String {
+        "Claude wants to use \(gate.detail ?? "a tool")"
+    }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: Metrics.spacing) {
+            Text(Self.message(for: gate))
+                .font(.footnote.weight(.semibold))
+                .lineLimit(Metrics.messageLineLimit)
+            HStack(spacing: Metrics.spacing) {
+                ForEach(GateChoiceSpec.specs(for: gate), id: \.affordance) { spec in
+                    decisionButton(spec)
+                }
+            }
+        }
+        .padding(.horizontal, Metrics.horizontalPadding)
+        .padding(.vertical, Metrics.verticalPadding)
+        .background(.thinMaterial, in: RoundedRectangle(cornerRadius: Metrics.cornerRadius))
+        .accessibilityElement(children: .contain)
+    }
+
+    private func decisionButton(_ spec: GateChoiceSpec) -> some View {
+        Button(spec.label) {
+            onDecide(spec.affordance, gate.epoch) // epoch of the RENDERED gate
+        }
+        .buttonStyle(.borderedProminent)
+        .controlSize(.small)
+        .tint(tint(for: spec.affordance))
+    }
+
+    private func tint(for affordance: GateState.Affordance) -> Color {
+        switch affordance {
+        case .approve, .approveAuto, .approveReview: return .green
+        case .reject: return .red
+        case .keepPlanning: return .indigo
+        }
+    }
+}

ios/App/WebTerm/Components/KeyBar.swift

@@ -0,0 +1,227 @@
+import SessionCore
+import UIKit
+
+/// T-iOS-11 · Mobile key bar + hardware key mapping, mirroring
+/// `public/keybar.ts` — the Claude Code keys a phone keyboard can't produce,
+/// most-used first. EVERY label→bytes lookup resolves through
+/// `KeyByteMap` (SessionCore) — no byte literal lives in this file.
+///
+/// The bar is installed as the terminal's `inputAccessoryView` and sends via
+/// the ViewModel/engine DIRECTLY (bypassing SwiftTerm's text path so a tap
+/// never pops or fights the soft keyboard — same reason the web bar bypasses
+/// xterm and calls `ws.send`).
+
+// MARK: - Layout data (mirror of KEYBAR_BUTTONS)
+
+/// One key-bar button: glyph, short function caption (shown under the glyph,
+/// self-documenting on touch) and the full title for accessibility.
+struct KeyBarButtonSpec: Equatable, Sendable {
+    let key: KeyByteMap.Key
+    let label: String
+    let caption: String
+    let title: String
+    let isPrimary: Bool
+
+    init(key: KeyByteMap.Key, label: String, caption: String, title: String,
+         isPrimary: Bool = false) {
+        self.key = key
+        self.label = label
+        self.caption = caption
+        self.title = title
+        self.isPrimary = isPrimary
+    }
+}
+
+/// Button order/copy transcribed from `public/keybar.ts` `KEYBAR_BUTTONS`
+/// (most-used Claude Code keys first). The 🎤 voice button is P2 (T-iOS-31).
+enum KeyBarLayout {
+    static let buttons: [KeyBarButtonSpec] = [
+        KeyBarButtonSpec(key: .esc, label: "Esc", caption: "中断",
+                         title: "Esc — interrupt Claude / dismiss", isPrimary: true),
+        KeyBarButtonSpec(key: .escEsc, label: "Esc²", caption: "回溯",
+                         title: "Esc Esc — rewind / clear draft"),
+        KeyBarButtonSpec(key: .shiftTab, label: "⇧Tab", caption: "模式",
+                         title: "Shift+Tab — cycle plan / auto-accept mode"),
+        KeyBarButtonSpec(key: .arrowUp, label: "↑", caption: "上一个",
+                         title: "Up — previous option / history"),
+        KeyBarButtonSpec(key: .arrowDown, label: "↓", caption: "下一个",
+                         title: "Down — next option / history"),
+        KeyBarButtonSpec(key: .enter, label: "⏎", caption: "确认",
+                         title: "Enter — confirm"),
+        KeyBarButtonSpec(key: .ctrlC, label: "^C", caption: "取消",
+                         title: "Ctrl+C — cancel / quit"),
+        KeyBarButtonSpec(key: .ctrlR, label: "^R", caption: "搜历史",
+                         title: "Ctrl+R — reverse-search command history"),
+        KeyBarButtonSpec(key: .ctrlO, label: "^O", caption: "详情",
+                         title: "Ctrl+O — expand transcript / tool detail"),
+        KeyBarButtonSpec(key: .ctrlL, label: "^L", caption: "重绘",
+                         title: "Ctrl+L — redraw screen"),
+        KeyBarButtonSpec(key: .ctrlT, label: "^T", caption: "任务",
+                         title: "Ctrl+T — toggle task list"),
+        KeyBarButtonSpec(key: .ctrlB, label: "^B", caption: "后台",
+                         title: "Ctrl+B — background running task"),
+        KeyBarButtonSpec(key: .ctrlD, label: "^D", caption: "退出",
+                         title: "Ctrl+D — exit session (EOF)"),
+        KeyBarButtonSpec(key: .tab, label: "Tab", caption: "补全",
+                         title: "Tab — complete / toggle"),
+        KeyBarButtonSpec(key: .arrowLeft, label: "←", caption: "左移",
+                         title: "Left — move cursor left"),
+        KeyBarButtonSpec(key: .arrowRight, label: "→", caption: "右移",
+                         title: "Right — move cursor right"),
+        KeyBarButtonSpec(key: .slash, label: "/", caption: "命令",
+                         title: "Slash — command launcher"),
+    ]
+}
+
+private enum KeyBarMetrics {
+    static let barHeight: CGFloat = 52
+    static let buttonSpacing: CGFloat = 6
+    static let contentInset: CGFloat = 8
+    static let buttonInsets = NSDirectionalEdgeInsets(
+        top: 4, leading: 9, bottom: 4, trailing: 9
+    )
+}
+
+// MARK: - KeyBarView (inputAccessoryView)
+
+/// Horizontally scrolling key bar, installed as the terminal's
+/// `inputAccessoryView`. Taps call `onKey` — the screen routes them to
+/// `TerminalViewModel.send(key:)`, which resolves bytes via `KeyByteMap`.
+final class KeyBarView: UIInputView {
+    /// Tap outlet. `@MainActor`-typed so the handler can drive the ViewModel.
+    var onKey: (@MainActor (KeyByteMap.Key) -> Void)?
+    /// Built buttons in layout order (test-visible).
+    private(set) var keyButtons: [UIButton] = []
+
+    init() {
+        super.init(
+            frame: CGRect(x: 0, y: 0, width: 0, height: KeyBarMetrics.barHeight),
+            inputViewStyle: .keyboard
+        )
+        allowsSelfSizing = true
+        buildBar()
+    }
+
+    @available(*, unavailable, message: "KeyBarView is code-built only")
+    required init?(coder: NSCoder) {
+        return nil
+    }
+
+    override var intrinsicContentSize: CGSize {
+        CGSize(width: UIView.noIntrinsicMetric, height: KeyBarMetrics.barHeight)
+    }
+
+    private func buildBar() {
+        let stack = UIStackView()
+        stack.axis = .horizontal
+        stack.spacing = KeyBarMetrics.buttonSpacing
+        stack.alignment = .center
+        stack.translatesAutoresizingMaskIntoConstraints = false
+
+        for spec in KeyBarLayout.buttons {
+            let button = makeButton(for: spec)
+            keyButtons = keyButtons + [button]
+            stack.addArrangedSubview(button)
+        }
+
+        let scroll = UIScrollView()
+        scroll.showsHorizontalScrollIndicator = false
+        scroll.translatesAutoresizingMaskIntoConstraints = false
+        scroll.addSubview(stack)
+        addSubview(scroll)
+
+        NSLayoutConstraint.activate([
+            scroll.leadingAnchor.constraint(equalTo: leadingAnchor),
+            scroll.trailingAnchor.constraint(equalTo: trailingAnchor),
+            scroll.topAnchor.constraint(equalTo: topAnchor),
+            scroll.bottomAnchor.constraint(equalTo: bottomAnchor),
+            stack.leadingAnchor.constraint(
+                equalTo: scroll.contentLayoutGuide.leadingAnchor,
+                constant: KeyBarMetrics.contentInset
+            ),
+            stack.trailingAnchor.constraint(
+                equalTo: scroll.contentLayoutGuide.trailingAnchor,
+                constant: -KeyBarMetrics.contentInset
+            ),
+            stack.topAnchor.constraint(equalTo: scroll.contentLayoutGuide.topAnchor),
+            stack.bottomAnchor.constraint(equalTo: scroll.contentLayoutGuide.bottomAnchor),
+            stack.heightAnchor.constraint(equalTo: scroll.frameLayoutGuide.heightAnchor),
+        ])
+    }
+
+    private func makeButton(for spec: KeyBarButtonSpec) -> UIButton {
+        var config: UIButton.Configuration = spec.isPrimary ? .tinted() : .plain()
+        var label = AttributedString(spec.label)
+        label.font = UIFont.monospacedSystemFont(
+            ofSize: UIFont.preferredFont(forTextStyle: .footnote).pointSize,
+            weight: .semibold
+        )
+        config.attributedTitle = label
+        var caption = AttributedString(spec.caption)
+        caption.font = UIFont.preferredFont(forTextStyle: .caption2)
+        caption.foregroundColor = .secondaryLabel
+        config.attributedSubtitle = caption
+        config.titleAlignment = .center
+        config.contentInsets = KeyBarMetrics.buttonInsets
+
+        let button = UIButton(configuration: config)
+        button.accessibilityLabel = spec.title
+        button.addAction(
+            UIAction { [weak self] _ in self?.onKey?(spec.key) },
+            for: .touchUpInside
+        )
+        return button
+    }
+}
+
+// MARK: - Hardware keyboard (UIKeyCommand, same KeyByteMap mapping)
+
+/// Hardware-keyboard chords routed through the SAME `KeyByteMap` mapping
+/// (plan §7 T-iOS-11). Scope decision (documented deviation): only Esc,
+/// Shift+Tab and the Ctrl chords are registered —
+/// - arrows stay SwiftTerm-native: a fixed CSI override would break
+///   application-cursor-keys mode (DECCKM: vim/htop expect `ESC O A`);
+/// - Enter/Tab/"/" are ordinary typing SwiftTerm already delivers;
+/// - Esc·Esc is simply two Esc presses.
+/// UIKeyCommand interception replaces (never duplicates) the responder's own
+/// press handling, so each chord is sent exactly once.
+enum HardwareKeyCommands {
+    struct Chord: Equatable {
+        let key: KeyByteMap.Key
+        let input: String
+        let modifiers: UIKeyModifierFlags
+    }
+
+    static let chords: [Chord] = [
+        Chord(key: .esc, input: UIKeyCommand.inputEscape, modifiers: []),
+        Chord(key: .shiftTab, input: "\t", modifiers: .shift),
+        Chord(key: .ctrlC, input: "c", modifiers: .control),
+        Chord(key: .ctrlR, input: "r", modifiers: .control),
+        Chord(key: .ctrlO, input: "o", modifiers: .control),
+        Chord(key: .ctrlL, input: "l", modifiers: .control),
+        Chord(key: .ctrlT, input: "t", modifiers: .control),
+        Chord(key: .ctrlB, input: "b", modifiers: .control),
+        Chord(key: .ctrlD, input: "d", modifiers: .control),
+    ]
+
+    /// One prioritized `UIKeyCommand` per chord, all firing `action`.
+    /// (`UIKeyCommand` is `@MainActor` in the SDK, hence the isolation.)
+    @MainActor
+    static func build(action: Selector) -> [UIKeyCommand] {
+        chords.map { chord in
+            let command = UIKeyCommand(
+                action: action, input: chord.input, modifierFlags: chord.modifiers
+            )
+            command.wantsPriorityOverSystemBehavior = true
+            return command
+        }
+    }
+
+    /// Reverse lookup for the command handler: which chord fired.
+    @MainActor
+    static func key(matching command: UIKeyCommand) -> KeyByteMap.Key? {
+        chords.first {
+            $0.input == command.input && $0.modifiers == command.modifierFlags
+        }?.key
+    }
+}

ios/App/WebTerm/Components/PlanGateSheet.swift

@@ -0,0 +1,73 @@
+import SessionCore
+import SwiftUI
+
+/// T-iOS-14 · Three-way sheet for a PLAN gate (B4): Approve+Auto /
+/// Approve+Review / Keep Planning — mapping mirrors public/tabs.ts:345-347
+/// exactly via `GateState.Affordance.clientMessage` (acceptEdits / default /
+/// reject; never raw `auto`, and NO allowAutoMode gating — plan §7 T-iOS-14).
+///
+/// Render-only: state lives in `GateViewModel`; every tap reports the
+/// affordance PLUS the epoch of the gate THIS sheet rendered (stale-tap
+/// first-line guard). Presentation (`.sheet`) wiring is T-iOS-15.
+struct PlanGateSheet: View {
+    /// Mirror of public/tabs.ts:326 plan-gate headline.
+    static let title = "Claude finished planning — how should it proceed?"
+
+    let gate: GateState
+    let onDecide: (GateState.Affordance, Int) -> Void
+
+    private enum Metrics {
+        static let spacing: CGFloat = 12
+        static let padding: CGFloat = 20
+        static let captionSpacing: CGFloat = 2
+    }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: Metrics.spacing) {
+            Text(Self.title)
+                .font(.headline)
+            ForEach(GateChoiceSpec.specs(for: gate), id: \.affordance) { spec in
+                choiceButton(spec)
+            }
+        }
+        .padding(Metrics.padding)
+        .presentationDetents([.medium])
+        .accessibilityElement(children: .contain)
+    }
+
+    private func choiceButton(_ spec: GateChoiceSpec) -> some View {
+        Button {
+            onDecide(spec.affordance, gate.epoch) // epoch of the RENDERED gate
+        } label: {
+            VStack(alignment: .leading, spacing: Metrics.captionSpacing) {
+                Text(spec.label)
+                    .font(.body.weight(.medium))
+                Text(Self.caption(for: spec.affordance))
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+            }
+            .frame(maxWidth: .infinity, alignment: .leading)
+        }
+        .buttonStyle(.bordered)
+        .tint(tint(for: spec.affordance))
+    }
+
+    /// Secondary line under each choice: what the wire mode actually does.
+    static func caption(for affordance: GateState.Affordance) -> String {
+        switch affordance {
+        case .approveAuto: return "执行计划，编辑自动接受（acceptEdits）"
+        case .approveReview: return "执行计划，每次编辑需确认（default）"
+        case .keepPlanning: return "继续规划，不执行"
+        case .approve: return "允许本次工具调用"
+        case .reject: return "拒绝本次工具调用"
+        }
+    }
+
+    private func tint(for affordance: GateState.Affordance) -> Color {
+        switch affordance {
+        case .approve, .approveAuto, .approveReview: return .green
+        case .reject: return .red
+        case .keepPlanning: return .indigo
+        }
+    }
+}

ios/App/WebTerm/Components/ReconnectBanner.swift

@@ -0,0 +1,96 @@
+import SwiftUI
+import WireProtocol
+
+/// T-iOS-11 · Connection-state banner over the terminal (plan §1: the terminal
+/// must NEVER "look connected but dead" — every non-live state is explicit).
+///
+/// Render input is the `Model` enum only; the mapping from engine events to a
+/// `Model` lives in `TerminalViewModel.bannerModel` (tested there).
+struct ReconnectBanner: View {
+    /// What the banner says. Terminal phases (`failed`/`exited`) win over
+    /// transient connection states (mapping in `TerminalViewModel.bannerModel`).
+    enum Model: Equatable {
+        case connecting
+        case reconnecting(attempt: Int, retryIn: Duration)
+        /// Non-retryable failure: actionable copy, NO spinner, NO retry loop.
+        case failed(message: String)
+        /// Session over — terminal is read-only from here on.
+        case exited(code: Int, reason: String?)
+    }
+
+    let model: Model
+
+    private enum Metrics {
+        static let contentSpacing: CGFloat = 8
+        static let horizontalPadding: CGFloat = 14
+        static let verticalPadding: CGFloat = 8
+        static let backgroundOpacity = 0.9
+    }
+
+    var body: some View {
+        HStack(spacing: Metrics.contentSpacing) {
+            if isSpinning {
+                ProgressView()
+                    .controlSize(.small)
+            } else {
+                Image(systemName: iconName)
+            }
+            Text(text)
+                .font(.footnote)
+                .multilineTextAlignment(.leading)
+        }
+        .padding(.horizontal, Metrics.horizontalPadding)
+        .padding(.vertical, Metrics.verticalPadding)
+        .background(tint.opacity(Metrics.backgroundOpacity), in: Capsule())
+        .foregroundStyle(.white)
+        .accessibilityElement(children: .combine)
+    }
+
+    private var isSpinning: Bool {
+        switch model {
+        case .connecting, .reconnecting: return true
+        case .failed, .exited: return false
+        }
+    }
+
+    private var iconName: String {
+        switch model {
+        case .failed: return "exclamationmark.octagon.fill"
+        case .exited: return "flag.checkered"
+        case .connecting, .reconnecting: return "wifi"
+        }
+    }
+
+    private var tint: Color {
+        switch model {
+        case .connecting: return .gray
+        case .reconnecting: return .orange
+        case .failed: return .red
+        case .exited: return .indigo
+        }
+    }
+
+    private var text: String {
+        switch model {
+        case .connecting:
+            return "连接中…"
+        case .reconnecting(let attempt, let retryIn):
+            return "连接已断开 · 第 \(attempt) 次重连将在 \(retryIn.components.seconds)s 后…"
+        case .failed(let message):
+            return message
+        case .exited(let code, let reason):
+            return Self.exitText(code: code, reason: reason)
+        }
+    }
+
+    /// Exit copy: spawn failure (-1, M4) reads as an error; a normal exit reads
+    /// as a conclusion. `reason` is server-supplied display text (untrusted —
+    /// rendered as plain text only).
+    private static func exitText(code: Int, reason: String?) -> String {
+        if code == WireConstants.spawnFailedExitCode {
+            return "启动 shell 失败：\(reason ?? "未知原因")"
+        }
+        let suffix = reason.map { "（\($0)）" } ?? ""
+        return "会话已退出 exit \(code)\(suffix) · 终端已只读"
+    }
+}

ios/App/WebTerm/Components/TelemetryChips.swift

@@ -0,0 +1,127 @@
+import SwiftUI
+import WireProtocol
+
+/// T-iOS-13 · Telemetry chips for a session-list row — the iOS mirror of the
+/// web's `renderTelemetryGauge` (public/preview-grid.ts:197): context-usage %
+/// (warn > 80), $cost to 4 places, model chip, PR badge.
+///
+/// Staleness: chips grey out when `StatusTelemetry.at` is STRICTLY older than
+/// `Tunables.telemetryStaleTtlMs` (same `>` rule as the web's `tg-stale`).
+/// The comparison lives in `Model`, computed from an injected `nowMs` so the
+/// ViewModel tests are deterministic (task RED list).
+///
+/// Security (mirrors SEC-H5/SEC-L5): every telemetry string is server-supplied
+/// UNTRUSTED input — rendered as plain `Text` only; the PR badge becomes a
+/// tappable `Link` iff its URL parses as https, otherwise it renders as text.
+struct TelemetryChips: View {
+    /// Immutable render input, derived once per list rebuild.
+    struct Model: Equatable, Sendable {
+        let contextUsedPct: Double?
+        /// Pre-formatted `$X.XXXX` (mirrors the web's `toFixed(4)`).
+        let costText: String?
+        let modelName: String?
+        /// Pre-formatted `PR #N`.
+        let prText: String?
+        let prReviewState: String?
+        /// Tappable PR destination — https URLs ONLY (SEC-L5 mirror), else nil.
+        let prURL: URL?
+        /// True when `at` is strictly older than `Tunables.telemetryStaleTtlMs`.
+        let isStale: Bool
+
+        /// nil when the session has no telemetry at all (row renders no chips).
+        init?(telemetry: StatusTelemetry?, nowMs: Int) {
+            guard let telemetry else { return nil }
+            isStale = nowMs - telemetry.at > Tunables.telemetryStaleTtlMs
+            contextUsedPct = telemetry.contextUsedPct
+            costText = telemetry.costUsd.map { String(format: Format.cost, $0) }
+            modelName = telemetry.model
+            if let pr = telemetry.pr {
+                prText = "PR #\(pr.number)"
+                prReviewState = pr.reviewState
+                prURL = Self.httpsOnlyURL(pr.url)
+            } else {
+                prText = nil
+                prReviewState = nil
+                prURL = nil
+            }
+        }
+
+        /// `ctx NN%` — same rounding as the web label (`Math.round`).
+        var contextText: String? {
+            contextUsedPct.map { "ctx \(Int($0.rounded()))%" }
+        }
+
+        /// Mirrors the web's `tg-ctx-warn` threshold (strictly > 80).
+        var isContextWarning: Bool {
+            (contextUsedPct ?? 0) > Format.contextWarnPct
+        }
+
+        var isEmpty: Bool {
+            contextUsedPct == nil && costText == nil && modelName == nil && prText == nil
+        }
+
+        /// SEC-L5 mirror: only https URLs are ever offered as link targets.
+        static func httpsOnlyURL(_ raw: String) -> URL? {
+            guard let url = URL(string: raw),
+                  url.scheme?.lowercased() == Format.httpsScheme
+            else { return nil }
+            return url
+        }
+    }
+
+    let model: Model
+
+    var body: some View {
+        HStack(spacing: Metrics.chipSpacing) {
+            if let contextText = model.contextText {
+                Text(contextText)
+                    .foregroundStyle(model.isContextWarning ? Color.orange : Color.secondary)
+            }
+            if let costText = model.costText {
+                chip(costText)
+            }
+            if let modelName = model.modelName {
+                chip(modelName)
+            }
+            prBadge
+        }
+        .font(.caption2.monospacedDigit())
+        .lineLimit(1)
+        .opacity(model.isStale ? Metrics.staleOpacity : 1)
+        .grayscale(model.isStale ? 1 : 0)
+    }
+
+    @ViewBuilder private var prBadge: some View {
+        if let prText = model.prText {
+            let label = model.prReviewState.map { "\(prText) · \($0)" } ?? prText
+            if let url = model.prURL {
+                Link(label, destination: url)
+            } else {
+                chip(label)
+            }
+        }
+    }
+
+    private func chip(_ text: String) -> some View {
+        Text(text)
+            .foregroundStyle(.secondary)
+            .padding(.horizontal, Metrics.chipHorizontalPadding)
+            .background(.quaternary, in: Capsule())
+    }
+
+    // MARK: - Named constants (no magic numbers, plan §4)
+
+    private enum Metrics {
+        static let chipSpacing: CGFloat = 6
+        static let chipHorizontalPadding: CGFloat = 5
+        static let staleOpacity = 0.45
+    }
+
+    private enum Format {
+        /// Mirrors web `$${costUsd.toFixed(4)}`.
+        static let cost = "$%.4f"
+        /// Mirrors web `tg-ctx-warn` (`contextUsedPct > 80`).
+        static let contextWarnPct = 80.0
+        static let httpsScheme = "https"
+    }
+}

ios/App/WebTerm/Screens/PairingScreen.swift

@@ -0,0 +1,350 @@
+import HostRegistry
+import SwiftUI
+import UIKit
+#if !targetEnvironment(simulator)
+import VisionKit
+#endif
+
+/// T-iOS-12 · Pairing screen: QR scan (real device only) + manual URL entry +
+/// probe UI. Pure presentation over `PairingViewModel` — every rule (input
+/// validation, the zero-network-before-confirm gate, §5.4 warning tiers,
+/// error copy/actions) lives in the VM where it is unit-tested.
+///
+/// Presentation-agnostic on purpose: T-iOS-15 pushes it as the first-run
+/// screen, and the session list header presents the SAME screen as a sheet to
+/// add/switch hosts (the "多 host 切换入口" of the task's step list).
+///
+/// Scanner: VisionKit `DataScannerViewController` — compiled out for the
+/// simulator (`#if targetEnvironment(simulator)`), where manual entry is the
+/// pairing path; on device the entry also hides when scanning is unsupported.
+/// `NSCameraUsageDescription` is already declared (project.yml, plan §5.2).
+struct PairingScreen: View {
+    @Bindable var viewModel: PairingViewModel
+    /// Navigate-on-paired hook for the T-iOS-15 wiring.
+    var onPaired: (HostRegistry.Host) -> Void = { _ in }
+
+    @State private var manualURLText = ""
+    @State private var isShowingScanner = false
+    @State private var scannerError: String?
+
+    var body: some View {
+        content
+            .navigationTitle(ScreenCopy.title)
+            .onChange(of: viewModel.pairedHost) { _, paired in
+                guard let paired else { return }
+                onPaired(paired)
+            }
+    }
+
+    @ViewBuilder private var content: some View {
+        switch viewModel.phase {
+        case .idle:
+            idleView
+        case .confirming(let pending):
+            ConfirmHostView(pending: pending, viewModel: viewModel)
+        case .probing(let pending):
+            probingView(pending)
+        case .failed(let pending, let failure):
+            FailureView(pending: pending, failure: failure, viewModel: viewModel)
+        case .paired(let host):
+            pairedView(host)
+        }
+    }
+
+    // MARK: - Idle: manual entry + scan entry
+
+    private var idleView: some View {
+        Form {
+            Section(ScreenCopy.manualSectionTitle) {
+                TextField(ScreenCopy.manualPlaceholder, text: $manualURLText)
+                    .keyboardType(.URL)
+                    .textInputAutocapitalization(.never)
+                    .autocorrectionDisabled()
+                Button(ScreenCopy.manualSubmit) {
+                    viewModel.submitManualURL(manualURLText)
+                }
+            }
+            if let rejection = viewModel.inputRejection {
+                Section {
+                    Text(rejection).foregroundStyle(.red)
+                }
+            }
+            if PairingScanAvailability.isAvailable {
+                Section {
+                    Button {
+                        scannerError = nil
+                        isShowingScanner = true
+                    } label: {
+                        Label(ScreenCopy.scanButton, systemImage: "qrcode.viewfinder")
+                    }
+                }
+            }
+            Section {
+                Text(ScreenCopy.qrHint)
+                    .font(.footnote)
+                    .foregroundStyle(.secondary)
+            }
+        }
+        .sheet(isPresented: $isShowingScanner) { scannerSheet }
+    }
+
+    @ViewBuilder private var scannerSheet: some View {
+        #if targetEnvironment(simulator)
+        // Unreachable: the entry is hidden on the simulator. Kept total.
+        Text(ScreenCopy.scanUnavailable)
+        #else
+        ZStack(alignment: .bottom) {
+            QRScannerView(
+                onCode: { payload in
+                    isShowingScanner = false
+                    viewModel.handleScannedCode(payload)
+                },
+                onError: { message in scannerError = message }
+            )
+            if let scannerError {
+                Text(scannerError)
+                    .foregroundStyle(.red)
+                    .padding()
+                    .background(.thinMaterial, in: RoundedRectangle(
+                        cornerRadius: Metrics.errorCornerRadius
+                    ))
+                    .padding()
+            }
+        }
+        #endif
+    }
+
+    // MARK: - Probing / paired
+
+    private func probingView(_ pending: PairingViewModel.PendingHost) -> some View {
+        VStack(spacing: Metrics.stackSpacing) {
+            ProgressView()
+            Text(ScreenCopy.probing(pending.displayAddress))
+                .foregroundStyle(.secondary)
+        }
+        .padding()
+    }
+
+    private func pairedView(_ host: HostRegistry.Host) -> some View {
+        VStack(spacing: Metrics.stackSpacing) {
+            Image(systemName: "checkmark.circle.fill")
+                .font(.largeTitle)
+                .foregroundStyle(.green)
+            Text(ScreenCopy.paired(host.name))
+        }
+        .padding()
+    }
+}
+
+// MARK: - Confirm page (parsed address + §5.4 warning tier + name)
+
+private struct ConfirmHostView: View {
+    let pending: PairingViewModel.PendingHost
+    @Bindable var viewModel: PairingViewModel
+
+    var body: some View {
+        Form {
+            Section(ScreenCopy.confirmSectionTitle) {
+                // Single-point-derived scheme://host[:port] — never hand-built.
+                Text(pending.displayAddress)
+                    .font(.system(.body, design: .monospaced))
+                TextField(ScreenCopy.namePlaceholder, text: $viewModel.hostName)
+            }
+            warningSection
+            Section {
+                Button(ScreenCopy.connect) {
+                    Task { await viewModel.confirmConnect() }
+                }
+                Button(ScreenCopy.cancel, role: .cancel) {
+                    viewModel.cancel()
+                }
+            }
+        }
+    }
+
+    @ViewBuilder private var warningSection: some View {
+        switch pending.warning {
+        case .none:
+            EmptyView()
+        case .tailscaleEncrypted:
+            Section {
+                Label(ScreenCopy.tailscaleBadge, systemImage: "lock.shield")
+                    .foregroundStyle(.green)
+            }
+        case .plaintextLAN:
+            Section {
+                Label(ScreenCopy.plaintextNotice, systemImage: "eye")
+                    .foregroundStyle(.orange)
+            }
+        case .publicHostBlocking:
+            Section {
+                Label(ScreenCopy.publicWarning, systemImage: "exclamationmark.octagon.fill")
+                    .foregroundStyle(.red)
+                    .font(.headline)
+                Toggle(ScreenCopy.publicAcknowledge,
+                       isOn: $viewModel.hasAcknowledgedPublicRisk)
+                if viewModel.needsPublicRiskAcknowledgement {
+                    Text(ScreenCopy.publicAckRequired)
+                        .foregroundStyle(.red)
+                        .font(.footnote)
+                }
+            }
+        }
+    }
+}
+
+// MARK: - Failure page (inline copy + recovery action)
+
+private struct FailureView: View {
+    let pending: PairingViewModel.PendingHost
+    let failure: PairingViewModel.FailureDisplay
+    let viewModel: PairingViewModel
+
+    var body: some View {
+        Form {
+            Section(pending.displayAddress) {
+                Label(failure.message, systemImage: "xmark.octagon")
+                    .foregroundStyle(.red)
+            }
+            Section {
+                if failure.action == .openLocalNetworkSettings {
+                    Button(ScreenCopy.openSettings) { openAppSettings() }
+                }
+                Button(ScreenCopy.retry) {
+                    Task { await viewModel.retry() }
+                }
+                Button(ScreenCopy.back, role: .cancel) {
+                    viewModel.cancel()
+                }
+            }
+        }
+    }
+
+    /// The app's Settings pane hosts its 本地网络 toggle — there is no public
+    /// deep link straight to 隐私 → 本地网络 (plan §5.2 guidance).
+    private func openAppSettings() {
+        guard let url = URL(string: UIApplication.openSettingsURLString) else { return }
+        UIApplication.shared.open(url)
+    }
+}
+
+// MARK: - Scan availability
+
+enum PairingScanAvailability {
+    /// Simulator: no camera → entry hidden, manual entry is the pairing path
+    /// (task ruling). Device: also requires VisionKit support.
+    /// (`DataScannerViewController.isSupported` is MainActor-isolated.)
+    @MainActor static var isAvailable: Bool {
+        #if targetEnvironment(simulator)
+        return false
+        #else
+        return DataScannerViewController.isSupported
+        #endif
+    }
+}
+
+// MARK: - VisionKit scanner (device only)
+
+#if !targetEnvironment(simulator)
+/// Thin `DataScannerViewController` wrapper: QR symbology only; the FIRST
+/// recognized code wins (the web QR fills the screen — no tap-to-pick needed).
+/// The payload is handed to the VM untouched — validation is the VM's job.
+private struct QRScannerView: UIViewControllerRepresentable {
+    let onCode: (String) -> Void
+    let onError: (String) -> Void
+
+    func makeCoordinator() -> Coordinator {
+        Coordinator(onCode: onCode)
+    }
+
+    func makeUIViewController(context: Context) -> DataScannerViewController {
+        let scanner = DataScannerViewController(
+            recognizedDataTypes: [.barcode(symbologies: [.qr])],
+            qualityLevel: .balanced,
+            isHighlightingEnabled: true
+        )
+        scanner.delegate = context.coordinator
+        return scanner
+    }
+
+    func updateUIViewController(_ scanner: DataScannerViewController, context: Context) {
+        guard !scanner.isScanning else { return }
+        do {
+            try scanner.startScanning()
+        } catch {
+            // Explicit surfacing, never a silent swallow (plan §4): camera
+            // denied/busy shows inline in the sheet; manual entry remains.
+            onError(ScreenCopy.scannerStartFailed(error.localizedDescription))
+        }
+    }
+
+    @MainActor
+    final class Coordinator: NSObject, DataScannerViewControllerDelegate {
+        private let onCode: (String) -> Void
+        private var hasDelivered = false
+
+        init(onCode: @escaping (String) -> Void) {
+            self.onCode = onCode
+        }
+
+        func dataScanner(
+            _ dataScanner: DataScannerViewController,
+            didAdd addedItems: [RecognizedItem],
+            allItems: [RecognizedItem]
+        ) {
+            guard !hasDelivered else { return }
+            for item in addedItems {
+                if case .barcode(let barcode) = item,
+                   let payload = barcode.payloadStringValue {
+                    hasDelivered = true
+                    onCode(payload)
+                    return
+                }
+            }
+        }
+    }
+}
+#endif
+
+// MARK: - Screen constants
+
+private enum Metrics {
+    static let stackSpacing: CGFloat = 12
+    static let errorCornerRadius: CGFloat = 8
+}
+
+private enum ScreenCopy {
+    static let title = "配对主机"
+    static let manualSectionTitle = "输入地址"
+    static let manualPlaceholder = "http://192.168.1.5:3000"
+    static let manualSubmit = "连接"
+    static let scanButton = "扫描二维码"
+    static let scanUnavailable = "模拟器不支持扫码，请手输地址。"
+    static let qrHint = "在电脑的 web 终端工具栏点「Connect a device」可显示配对二维码；也可直接输入它的地址。"
+    static let confirmSectionTitle = "确认要连接的主机"
+    static let namePlaceholder = "主机名称"
+    static let connect = "连接"
+    static let cancel = "取消"
+    static let retry = "重试"
+    static let back = "返回"
+    static let openSettings = "去设置"
+    static let tailscaleBadge = "经 Tailscale 加密（WireGuard 网络层）"
+    static let plaintextNotice =
+        "ws:// 明文连接：键击与终端输出可被同一网络内的设备嗅探。仅限可信 LAN，推荐 tailscale serve（wss）。"
+    static let publicWarning =
+        "这是公网地址！任何能连上该端口的人都会得到你电脑的 shell。web-terminal 绝不应暴露到公网。"
+    static let publicAcknowledge = "我已了解风险，仍要连接"
+    static let publicAckRequired = "请先勾选上面的风险确认，再点连接。"
+
+    static func probing(_ address: String) -> String {
+        "正在验证 \(address) …"
+    }
+
+    static func paired(_ name: String) -> String {
+        "已配对：\(name)"
+    }
+
+    static func scannerStartFailed(_ reason: String) -> String {
+        "无法启动相机扫描：\(reason)。可改用手输地址。"
+    }
+}

ios/App/WebTerm/Screens/SessionListScreen.swift

@@ -0,0 +1,235 @@
+import HostRegistry
+import SwiftUI
+import WireProtocol
+
+/// T-iOS-13 · Session list screen (merged chooser + dashboard). Pure
+/// presentation over `SessionListViewModel` — polling cadence, badge priority,
+/// staleness, optimistic kill and the navigation signal are all VM logic,
+/// unit-tested in `SessionListViewModelTests`.
+///
+/// The T-iOS-15 wiring provides `onOpen` (push `TerminalScreen`, open with
+/// `request.sessionId` — nil = new session) and `onAddHost` (present the
+/// pairing sheet; call `viewModel.reloadHosts()` when it completes).
+struct SessionListScreen: View {
+    var viewModel: SessionListViewModel
+    /// Navigation hook: fired once per `OpenRequest` (unique id per tap).
+    var onOpen: (SessionListViewModel.OpenRequest) -> Void = { _ in }
+    /// Host-switch header hook: "添加主机" entry (pairing sheet, T-iOS-15).
+    var onAddHost: () -> Void = {}
+
+    var body: some View {
+        content
+            .navigationTitle(ScreenCopy.title)
+            .toolbar { hostMenu }
+            .onAppear { viewModel.appeared() }
+            .onDisappear { viewModel.disappeared() }
+            .onChange(of: viewModel.openRequest) { _, request in
+                guard let request else { return }
+                onOpen(request)
+            }
+    }
+
+    @ViewBuilder private var content: some View {
+        switch viewModel.emptyState {
+        case .notPaired:
+            notPairedView
+        case .noSessions:
+            noSessionsView
+        case nil:
+            sessionList
+        }
+    }
+
+    // MARK: - List
+
+    private var sessionList: some View {
+        List {
+            if let message = viewModel.fetchErrorMessage {
+                errorRow(message)
+            }
+            if let message = viewModel.killErrorMessage {
+                errorRow(message)
+            }
+            Button {
+                viewModel.requestNewSession()
+            } label: {
+                Label(ScreenCopy.newSession, systemImage: "plus.circle.fill")
+            }
+            ForEach(viewModel.rows) { row in
+                Button {
+                    viewModel.openSession(id: row.id)
+                } label: {
+                    SessionRowView(row: row)
+                }
+                .swipeActions(edge: .trailing, allowsFullSwipe: true) {
+                    Button(role: .destructive) {
+                        Task { await viewModel.kill(sessionId: row.id) }
+                    } label: {
+                        Label(ScreenCopy.kill, systemImage: "xmark.circle.fill")
+                    }
+                }
+            }
+        }
+        .refreshable { await viewModel.refresh() }
+    }
+
+    private func errorRow(_ message: String) -> some View {
+        Label(message, systemImage: "exclamationmark.triangle")
+            .font(.footnote)
+            .foregroundStyle(.red)
+    }
+
+    // MARK: - Empty states
+
+    private var notPairedView: some View {
+        ContentUnavailableView {
+            Label(ScreenCopy.notPairedTitle, systemImage: "personalhotspot")
+        } description: {
+            Text(ScreenCopy.notPairedHint)
+        } actions: {
+            Button(ScreenCopy.addHost) { onAddHost() }
+                .buttonStyle(.borderedProminent)
+        }
+    }
+
+    private var noSessionsView: some View {
+        ContentUnavailableView {
+            Label(ScreenCopy.noSessionsTitle, systemImage: "terminal")
+        } description: {
+            Text(ScreenCopy.noSessionsHint)
+        } actions: {
+            Button(ScreenCopy.newSession) { viewModel.requestNewSession() }
+                .buttonStyle(.borderedProminent)
+        }
+    }
+
+    // MARK: - Host-switch header (multi-host from HostStore)
+
+    private var hostMenu: some ToolbarContent {
+        ToolbarItem(placement: .topBarTrailing) {
+            Menu {
+                ForEach(viewModel.hosts) { host in
+                    Button {
+                        Task { await viewModel.selectHost(id: host.id) }
+                    } label: {
+                        if host.id == viewModel.activeHost?.id {
+                            Label(host.name, systemImage: "checkmark")
+                        } else {
+                            Text(host.name)
+                        }
+                    }
+                }
+                Divider()
+                Button {
+                    onAddHost()
+                } label: {
+                    Label(ScreenCopy.addHost, systemImage: "plus")
+                }
+            } label: {
+                Label(
+                    viewModel.activeHost?.name ?? ScreenCopy.hostMenuFallback,
+                    systemImage: "desktopcomputer"
+                )
+            }
+        }
+    }
+}
+
+// MARK: - Row
+
+private struct SessionRowView: View {
+    let row: SessionListViewModel.SessionRow
+
+    var body: some View {
+        HStack(alignment: .top, spacing: Metrics.rowSpacing) {
+            indicator
+                .frame(width: Metrics.indicatorWidth)
+            VStack(alignment: .leading, spacing: Metrics.rowInnerSpacing) {
+                Text(title)
+                    .font(.body)
+                    .lineLimit(1)
+                Text(meta)
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+                if let telemetry = row.telemetry, !telemetry.isEmpty {
+                    TelemetryChips(model: telemetry)
+                }
+            }
+        }
+        .opacity(row.info.exited ? Metrics.exitedOpacity : 1)
+        .accessibilityElement(children: .combine)
+    }
+
+    /// ⚠ badge outranks the status dot (VM decides via `indicator`).
+    @ViewBuilder private var indicator: some View {
+        switch row.indicator {
+        case .pendingApproval:
+            Image(systemName: "exclamationmark.triangle.fill")
+                .foregroundStyle(.orange)
+                .accessibilityLabel(ScreenCopy.pendingBadgeLabel)
+        case .status(let status):
+            Circle()
+                .fill(Self.dotColor(status))
+                .frame(width: Metrics.dotSize, height: Metrics.dotSize)
+                .padding(.top, Metrics.dotTopPadding)
+                .accessibilityLabel(Text(status.rawValue))
+        }
+    }
+
+    /// `cwd` is server-supplied display text (untrusted → plain Text only).
+    private var title: String {
+        guard let cwd = row.info.cwd, !cwd.isEmpty else { return ScreenCopy.unknownDirectory }
+        return URL(fileURLWithPath: cwd).lastPathComponent
+    }
+
+    private var meta: String {
+        var parts = [
+            ScreenCopy.clientCount(row.info.clientCount),
+            "\(row.info.cols)×\(row.info.rows)",
+        ]
+        if row.info.exited {
+            parts.append(ScreenCopy.exitedTag)
+        }
+        return parts.joined(separator: " · ")
+    }
+
+    private static func dotColor(_ status: ClaudeStatus) -> Color {
+        switch status {
+        case .working: return .green
+        case .waiting: return .orange
+        case .idle: return .blue
+        case .stuck: return .red
+        case .unknown: return .gray
+        }
+    }
+
+    private enum Metrics {
+        static let rowSpacing: CGFloat = 10
+        static let rowInnerSpacing: CGFloat = 3
+        static let indicatorWidth: CGFloat = 18
+        static let dotSize: CGFloat = 10
+        static let dotTopPadding: CGFloat = 5
+        static let exitedOpacity = 0.55
+    }
+}
+
+// MARK: - Screen copy
+
+private enum ScreenCopy {
+    static let title = "会话"
+    static let newSession = "新建会话"
+    static let kill = "结束"
+    static let addHost = "配对新主机"
+    static let hostMenuFallback = "主机"
+    static let notPairedTitle = "还没有配对的主机"
+    static let notPairedHint = "先配对你电脑上的 web-terminal（扫码或手输地址），会话会出现在这里。"
+    static let noSessionsTitle = "主机上没有运行中的会话"
+    static let noSessionsHint = "新建一个会话开始工作；关掉 App 后会话仍会在主机上继续跑。"
+    static let unknownDirectory = "未知目录"
+    static let exitedTag = "已退出"
+    static let pendingBadgeLabel = "等待审批"
+
+    static func clientCount(_ count: Int) -> String {
+        "\(count) 台设备在看"
+    }
+}

ios/App/WebTerm/Screens/TerminalScreen.swift

@@ -0,0 +1,145 @@
+import SessionCore
+import SwiftTerm
+import SwiftUI
+import UIKit
+
+/// T-iOS-11 · The terminal screen: SwiftTerm view + key bar + status banner.
+///
+/// Data flow (byte-shuttle preserved end to end):
+/// - inbound: `SessionEvent.output` → `TerminalViewModel` sink → `feed(text:)`
+///   (opaque ANSI/UTF-8 — the app NEVER parses terminal semantics);
+/// - outbound: SwiftTerm delegate `send` → `viewModel.sendInput`,
+///   `sizeChanged` → `viewModel.sendResize`; KeyBar taps and hardware
+///   `UIKeyCommand`s go through `viewModel.send(key:)` — every label→bytes
+///   lookup via `KeyByteMap`, bypassing SwiftTerm's text path so the soft
+///   keyboard never pops (mirrors the web bar's ws.send bypass).
+/// - IME: NO custom keydown/composition interception — SwiftTerm manages
+///   composition itself (CLAUDE.md gotcha; plan §7 T-iOS-11).
+///
+/// Navigation/lifecycle wiring (engine open/close, scenePhase) lands in
+/// T-iOS-15 — this screen only renders and routes.
+struct TerminalScreen: View {
+    let viewModel: TerminalViewModel
+
+    private enum Metrics {
+        static let bannerHorizontalPadding: CGFloat = 12
+        static let bannerTopPadding: CGFloat = 8
+    }
+
+    var body: some View {
+        TerminalHostView(viewModel: viewModel)
+            .ignoresSafeArea(.container, edges: .bottom)
+            .overlay(alignment: .top) {
+                if let model = viewModel.bannerModel {
+                    ReconnectBanner(model: model)
+                        .padding(.horizontal, Metrics.bannerHorizontalPadding)
+                        .padding(.top, Metrics.bannerTopPadding)
+                        .transition(.move(edge: .top).combined(with: .opacity))
+                }
+            }
+            .animation(.default, value: viewModel.bannerModel)
+            .onAppear { viewModel.start() }
+    }
+}
+
+// MARK: - SwiftTerm bridge
+
+/// `UIViewRepresentable` around `SwiftTerm.TerminalView` (plan §3.5). The
+/// KeyBar is installed as `inputAccessoryView`; hardware chords come from the
+/// `KeyCommandTerminalView` subclass. Both route through the ViewModel.
+private struct TerminalHostView: UIViewRepresentable {
+    let viewModel: TerminalViewModel
+
+    func makeCoordinator() -> Coordinator {
+        Coordinator(viewModel: viewModel)
+    }
+
+    func makeUIView(context: Context) -> KeyCommandTerminalView {
+        let terminal = KeyCommandTerminalView(frame: .zero)
+        terminal.terminalDelegate = context.coordinator
+
+        let viewModel = viewModel
+        terminal.onKeyCommand = { key in viewModel.send(key: key) }
+
+        let keyBar = KeyBarView()
+        keyBar.onKey = { key in viewModel.send(key: key) }
+        terminal.inputAccessoryView = keyBar
+
+        // Output sink: buffered replay flushes now, live bytes follow.
+        // @MainActor-typed closure — feeding off the main actor cannot compile.
+        viewModel.attachTerminalSink { [weak terminal] text in
+            terminal?.feed(text: text)
+        }
+        return terminal
+    }
+
+    func updateUIView(_ uiView: KeyCommandTerminalView, context: Context) {
+        // State-driven UI lives in SwiftUI (banner overlay); the terminal view
+        // itself is driven by the sink/delegate, nothing to push here.
+    }
+
+    /// SwiftTerm's delegate is a pre-concurrency protocol; the conformance is
+    /// `@preconcurrency` — SwiftTerm only calls it from the main thread (the
+    /// view itself is `@MainActor`), which the runtime check enforces.
+    @MainActor
+    final class Coordinator: NSObject, @preconcurrency TerminalViewDelegate {
+        private let viewModel: TerminalViewModel
+
+        init(viewModel: TerminalViewModel) {
+            self.viewModel = viewModel
+        }
+
+        /// User typed into SwiftTerm (soft/hardware keyboard, IME result):
+        /// raw bytes, passed through verbatim (invariant #9).
+        func send(source: TerminalView, data: ArraySlice<UInt8>) {
+            viewModel.sendInput(String(decoding: data, as: UTF8.self))
+        }
+
+        /// Layout produced a new grid → server `resize` (SIGWINCH). This is
+        /// also the latest-writer-wins size claim (v0.4 sizing model).
+        func sizeChanged(source: TerminalView, newCols: Int, newRows: Int) {
+            guard newCols > 0, newRows > 0 else { return } // pre-layout noise
+            viewModel.sendResize(cols: newCols, rows: newRows)
+        }
+
+        /// Tapped link (OSC 8 / detected URL — mirrors web M2 WebLinksAddon).
+        /// The link string is untrusted terminal output: http(s) only.
+        func requestOpenLink(source: TerminalView, link: String, params: [String: String]) {
+            guard let url = URL(string: link),
+                  let scheme = url.scheme?.lowercased(),
+                  scheme == "http" || scheme == "https"
+            else { return }
+            UIApplication.shared.open(url)
+        }
+
+        // Title/cwd surface in the session list via the server (T-iOS-13/23),
+        // not from the local emulator — deliberate no-ops.
+        func setTerminalTitle(source: TerminalView, title: String) {}
+        func hostCurrentDirectoryUpdate(source: TerminalView, directory: String?) {}
+        func scrolled(source: TerminalView, position: Double) {}
+        func rangeChanged(source: TerminalView, startY: Int, endY: Int) {}
+
+        /// OSC 52 lets the HOST write the device clipboard silently — declined
+        /// (server output is untrusted input; plan §4).
+        func clipboardCopy(source: TerminalView, content: Data) {}
+    }
+}
+
+/// `TerminalView` subclass adding hardware-keyboard `UIKeyCommand`s with the
+/// SAME `KeyByteMap` mapping as the key bar (scope decision documented on
+/// `HardwareKeyCommands`). Everything else — rendering, selection, IME —
+/// is stock SwiftTerm.
+final class KeyCommandTerminalView: TerminalView {
+    /// Chord outlet; the screen routes it to `TerminalViewModel.send(key:)`.
+    var onKeyCommand: (@MainActor (KeyByteMap.Key) -> Void)?
+
+    override var keyCommands: [UIKeyCommand]? {
+        (super.keyCommands ?? [])
+            + HardwareKeyCommands.build(action: #selector(runHardwareKeyCommand(_:)))
+    }
+
+    @objc private func runHardwareKeyCommand(_ sender: UIKeyCommand) {
+        guard let key = HardwareKeyCommands.key(matching: sender) else { return }
+        onKeyCommand?(key)
+    }
+}

ios/App/WebTerm/ViewModels/GateViewModel.swift

@@ -0,0 +1,319 @@
+import Foundation
+import Observation
+import SessionCore
+import UIKit
+import WireProtocol
+
+/// Haptic seam (T-iOS-14): gate-arrival feedback is injected so tests can
+/// assert "exactly once per gate epoch" without UIKit hardware.
+@MainActor
+protocol HapticSignaling {
+    /// A NEW gate (fresh epoch) is waiting for the user's decision.
+    func gateDidArrive()
+}
+
+/// Production haptics: notification-style buzz — a gate is Claude asking for a
+/// decision (THE steering primitive), not a mere UI tick.
+@MainActor
+final class GateHaptics: HapticSignaling {
+    private let generator = UINotificationFeedbackGenerator()
+
+    func gateDidArrive() {
+        generator.notificationOccurred(.warning)
+    }
+}
+
+/// T-iOS-14 · Gate + away-digest state (plan §3.5): a STANDALONE
+/// `@MainActor @Observable` VM consuming the SAME `SessionEvent` stream as
+/// `TerminalViewModel` — `.gate`/`.digest` are its domain, everything else is
+/// ignored here. TerminalScreen wiring (who fans the stream out) is T-iOS-15.
+///
+/// Stale-tap guard (FIRST line): every rendered gate button carries the epoch
+/// of the gate it was rendered against; `decide` compares that epoch — and the
+/// affordance — against the LATEST gate event received and silently drops a
+/// mismatch, so a slow tap can never resolve a NEWER gate than the one that
+/// was on screen (mirrors the web's pendingEpoch nonce,
+/// public/terminal-session.ts:98-102). The engine's `GateTracker.canDecide`
+/// is the SECOND line (SessionEngine type doc) — both must agree to send.
+///
+/// Plan-gate mapping is frozen in SessionCore
+/// (`GateState.Affordance.clientMessage`, mirror of public/tabs.ts:345-347):
+/// Approve+Auto → acceptEdits, Approve+Review → default, Keep Planning →
+/// reject. There is NO allowAutoMode gating anywhere — the web client never
+/// gates the plan three-way, and `uiConfig` is reserved for a future
+/// permission-mode picker (plan §3.1 note).
+@MainActor
+@Observable
+final class GateViewModel {
+    // MARK: - Observable UI state
+
+    /// The latest gate event received (nil = lifted). This is what taps are
+    /// validated against.
+    private(set) var currentGate: GateState?
+    /// Visible away digest (nil = nothing rendered; all-zero digests never
+    /// become visible).
+    private(set) var digest: AwayDigest?
+    /// True once the user opened the recent-entries detail; expansion cancels
+    /// the auto-fade (a digest must never vanish while being read).
+    private(set) var isDigestExpanded = false
+
+    /// Tool gate → two-button `GateBanner`.
+    var toolGate: GateState? { gate(of: .tool) }
+    /// Plan gate → three-way `PlanGateSheet`.
+    var planGate: GateState? { gate(of: .plan) }
+
+    // MARK: - Dependencies & plumbing (not observed)
+
+    @ObservationIgnored private let engine: SessionEngine
+    @ObservationIgnored private let events: AsyncStream<SessionEvent>
+    @ObservationIgnored private let haptics: any HapticSignaling
+    @ObservationIgnored private let clock: any Clock<Duration>
+    @ObservationIgnored private var consumeTask: Task<Void, Never>?
+    @ObservationIgnored private var fadeTask: Task<Void, Never>?
+    /// Highest epoch that already buzzed — the haptic fires ONCE per epoch
+    /// (sustained-pending refreshes reuse the epoch and stay silent).
+    @ObservationIgnored private var lastHapticEpoch = 0
+    /// Ordered decision queue: taps are synchronous, `engine.send` is async —
+    /// one pump task preserves submission order (same pattern as
+    /// TerminalViewModel's send pump).
+    @ObservationIgnored private var decisionQueue: [ClientMessage] = []
+    @ObservationIgnored private var isPumping = false
+
+    // MARK: - Test-visible diagnostics & deterministic barriers (internal)
+
+    /// Events applied so far — `waitUntilProcessed` barrier counter.
+    @ObservationIgnored private(set) var processedEventCount = 0
+    /// Decisions handed to the engine — `waitUntilForwarded` barrier counter.
+    @ObservationIgnored private(set) var forwardedDecisionCount = 0
+    /// Taps dropped by the first-line guard (stale epoch / lifted gate /
+    /// affordance no longer offered).
+    @ObservationIgnored private(set) var droppedStaleDecisionCount = 0
+    /// Completed auto-fades — `waitUntilFadeCompleted` barrier counter.
+    @ObservationIgnored private(set) var fadeCompletedCount = 0
+    /// Test tap, called after each event is applied (state already coherent).
+    @ObservationIgnored var onEventApplied: (@MainActor (SessionEvent) -> Void)?
+
+    private struct CountWaiter {
+        let target: Int
+        let continuation: CheckedContinuation<Void, Never>
+    }
+
+    @ObservationIgnored private var eventWaiters: [CountWaiter] = []
+    @ObservationIgnored private var decisionWaiters: [CountWaiter] = []
+    @ObservationIgnored private var fadeWaiters: [CountWaiter] = []
+
+    // MARK: - Lifecycle
+
+    /// - Parameters:
+    ///   - engine: send-side dependency (decisions only — open/close belong to
+    ///     the T-iOS-15 lifecycle owner).
+    ///   - events: the event stream to consume; the T-iOS-15 wiring passes a
+    ///     fan-out branch of `engine.events` shared with `TerminalViewModel`.
+    ///   - haptics: gate-arrival feedback (production: `GateHaptics`).
+    ///   - clock: drives the digest auto-fade (production: `ContinuousClock`).
+    init(
+        engine: SessionEngine, events: AsyncStream<SessionEvent>,
+        haptics: any HapticSignaling, clock: any Clock<Duration>
+    ) {
+        self.engine = engine
+        self.events = events
+        self.haptics = haptics
+        self.clock = clock
+    }
+
+    /// Begin consuming events. Idempotent — a second call is a no-op.
+    func start() {
+        guard consumeTask == nil else { return }
+        consumeTask = Task { [weak self] in
+            guard let events = self?.events else { return }
+            for await event in events {
+                guard let self else { return }
+                self.apply(event)
+            }
+            self?.releaseAllWaiters() // stream over — never leave a test hanging
+        }
+    }
+
+    /// Stop consuming (screen torn down); cancels the fade timer too.
+    func stop() {
+        consumeTask?.cancel()
+        consumeTask = nil
+        cancelFade()
+        releaseAllWaiters()
+    }
+
+    // MARK: - Decisions (Approve / Reject / plan three-way)
+
+    /// Resolve the held gate with `affordance`, tapped against the gate whose
+    /// `epoch` the button rendered. First-line stale guard: the epoch must
+    /// match the LATEST gate received AND the affordance must still be one the
+    /// current gate offers (a same-epoch kind morph invalidates old buttons).
+    /// Mismatch → dropped, nothing is sent.
+    func decide(_ affordance: GateState.Affordance, epoch: Int) {
+        guard let gate = currentGate, gate.epoch == epoch,
+              gate.affordances.contains(affordance)
+        else {
+            droppedStaleDecisionCount += 1
+            return
+        }
+        decisionQueue = decisionQueue + [affordance.clientMessage]
+        pumpIfIdle()
+    }
+
+    // MARK: - Digest interactions
+
+    /// Show the recent-entries detail; cancels the auto-fade so the digest
+    /// never vanishes while being read (documented decision).
+    func expandDigest() {
+        guard digest != nil else { return }
+        isDigestExpanded = true
+        cancelFade()
+    }
+
+    /// Explicitly dismiss the digest (the ✕ on the summary row).
+    func dismissDigest() {
+        digest = nil
+        isDigestExpanded = false
+        cancelFade()
+    }
+
+    // MARK: - Event application (MainActor)
+
+    private func apply(_ event: SessionEvent) {
+        switch event {
+        case .gate(let gate):
+            applyGate(gate)
+        case .digest(let digest):
+            applyDigest(digest)
+        case .connection, .adopted, .output, .exited, .telemetry:
+            break // TerminalViewModel's domain (T-iOS-11)
+        }
+        processedEventCount += 1
+        onEventApplied?(event)
+        eventWaiters = drainWaiters(eventWaiters, reached: processedEventCount)
+    }
+
+    private func applyGate(_ gate: GateState?) {
+        currentGate = gate
+        guard let gate, gate.epoch > lastHapticEpoch else { return }
+        lastHapticEpoch = gate.epoch // exactly one buzz per epoch
+        haptics.gateDidArrive()
+    }
+
+    /// All-zero digest → render nothing (spec). A visible digest starts
+    /// collapsed and auto-fades after `Tunables.digestFadeDelay` unless the
+    /// user expands it first.
+    private func applyDigest(_ incoming: AwayDigest) {
+        guard !incoming.isEmpty else { return }
+        cancelFade()
+        digest = incoming
+        isDigestExpanded = false
+        scheduleFade()
+    }
+
+    private func gate(of kind: GateKind) -> GateState? {
+        guard let currentGate, currentGate.kind == kind else { return nil }
+        return currentGate
+    }
+
+    // MARK: - Digest auto-fade (injected clock; zero real waits in tests)
+
+    private func scheduleFade() {
+        let clock = self.clock
+        fadeTask = Task { [weak self] in
+            do {
+                try await clock.sleep(for: Tunables.digestFadeDelay, tolerance: nil)
+            } catch {
+                return // cancelled: expanded, dismissed, replaced, or stopped
+            }
+            self?.completeFade()
+        }
+    }
+
+    private func completeFade() {
+        guard !isDigestExpanded else { return } // expand cancels; belt & braces
+        digest = nil
+        fadeTask = nil
+        fadeCompletedCount += 1
+        fadeWaiters = drainWaiters(fadeWaiters, reached: fadeCompletedCount)
+    }
+
+    private func cancelFade() {
+        fadeTask?.cancel()
+        fadeTask = nil
+    }
+
+    // MARK: - Ordered decision pump
+
+    private func pumpIfIdle() {
+        guard !isPumping else { return }
+        isPumping = true
+        Task { await self.pumpDecisions() }
+    }
+
+    private func pumpDecisions() async {
+        while let next = decisionQueue.first {
+            decisionQueue = Array(decisionQueue.dropFirst())
+            await engine.send(next)
+            forwardedDecisionCount += 1
+            decisionWaiters = drainWaiters(decisionWaiters, reached: forwardedDecisionCount)
+        }
+        isPumping = false
+    }
+
+    // MARK: - Deterministic test barriers (no polling, no real sleeps)
+
+    /// Suspends until at least `eventCount` events have been applied.
+    func waitUntilProcessed(eventCount target: Int) async {
+        await withCheckedContinuation { continuation in
+            guard processedEventCount < target else {
+                continuation.resume()
+                return
+            }
+            eventWaiters = eventWaiters + [CountWaiter(target: target, continuation: continuation)]
+        }
+    }
+
+    /// Suspends until at least `decisionCount` decisions reached the engine.
+    func waitUntilForwarded(decisionCount target: Int) async {
+        await withCheckedContinuation { continuation in
+            guard forwardedDecisionCount < target else {
+                continuation.resume()
+                return
+            }
+            decisionWaiters = decisionWaiters
+                + [CountWaiter(target: target, continuation: continuation)]
+        }
+    }
+
+    /// Suspends until at least `count` auto-fades have completed.
+    func waitUntilFadeCompleted(count target: Int) async {
+        await withCheckedContinuation { continuation in
+            guard fadeCompletedCount < target else {
+                continuation.resume()
+                return
+            }
+            fadeWaiters = fadeWaiters + [CountWaiter(target: target, continuation: continuation)]
+        }
+    }
+
+    /// Resumes every waiter satisfied by `count`; returns the still-waiting
+    /// remainder (immutable style — the caller reassigns).
+    private func drainWaiters(_ waiters: [CountWaiter], reached count: Int) -> [CountWaiter] {
+        let satisfied = waiters.filter { $0.target <= count }
+        for waiter in satisfied {
+            waiter.continuation.resume()
+        }
+        return waiters.filter { $0.target > count }
+    }
+
+    private func releaseAllWaiters() {
+        let all = eventWaiters + decisionWaiters + fadeWaiters
+        eventWaiters = []
+        decisionWaiters = []
+        fadeWaiters = []
+        for waiter in all {
+            waiter.continuation.resume()
+        }
+    }
+}

ios/App/WebTerm/ViewModels/PairingViewModel.swift

@@ -0,0 +1,398 @@
+import APIClient
+import Foundation
+import HostRegistry
+import Observation
+import WireProtocol
+
+/// T-iOS-12 · Pairing state machine (plan §7 / §5.4).
+///
+/// Flow: scan / manual URL → **confirm gate** → two-step probe →
+/// `Host{id,name}` into the `HostStore` + navigate signal.
+///
+/// Security invariants (plan §5 / task RED list):
+/// - Scan payloads are UNTRUSTED external input: parsed exclusively through
+///   `HostEndpoint` (single-point derivation — no hand-assembly), non-http(s)
+///   rejected with copy, and **zero network happens before the user confirms**
+///   (probe ① already GETs the target; probe ② spawns a PTY on it).
+/// - The §5.4 warning tiers render ON the confirm page; the public-host tier
+///   is BLOCKING — `confirmConnect` refuses to probe until the user has set
+///   `hasAcknowledgedPublicRisk` explicitly.
+/// - Every `PairingError` maps to inline copy + a recovery action
+///   (`localNetworkDenied` → Settings deep-link; `originRejected` surfaces the
+///   probe's hint VERBATIM; `atsBlocked` uses the §3.4 wording).
+///
+/// Documented decisions:
+/// - **Manual entry reuses the same confirm state as scanning** (task left it
+///   free): one code path, and the §5.4 warning tiers apply uniformly to
+///   typed URLs too. Convenience: input without `://` gets an `http://`
+///   prefix before the `HostEndpoint` parse (scan payloads get NO such help).
+/// - **Host classification is (re)implemented here**: APIClient's
+///   `PairingError.isPrivateOrLocalHost` is internal AND too coarse for the
+///   tiers (it collapses loopback/Tailscale/RFC1918 into one bucket).
+///   Duplication noted for the T-iOS-38 dedup pass.
+/// - `.local` (mDNS) hosts over http are shown the plaintext-LAN notice: they
+///   resolve to LAN addresses, so the §5.4 "ws:// on an untrusted LAN" row
+///   applies to them the same way.
+///
+/// §3.4 contract ruling (2026-07-04): the injected probe returns the validated
+/// `HostEndpoint`; `Host{id: UUID(), name:}` is constructed HERE (id/name are
+/// not the probe's to know). Production wiring (T-iOS-15) passes
+/// `runPairingProbe` with the real transports.
+@MainActor
+@Observable
+final class PairingViewModel {
+    /// The probe, injected as a closure so tests can both fake results AND
+    /// assert non-invocation before the user confirms (task RED list).
+    typealias Probe = @Sendable (HostEndpoint) async -> Result<HostEndpoint, PairingError>
+
+    // MARK: - UI state model
+
+    /// §5.4 warning tiers, decided from scheme + host class (see `warning(for:)`).
+    enum SecurityWarning: Equatable, Sendable {
+        /// https anywhere private-class, or ws→loopback: nothing to warn about.
+        case none
+        /// ws→100.64/10 or `*.ts.net`: WireGuard already encrypts — no
+        /// plaintext warning, an optional positive badge instead.
+        case tailscaleEncrypted
+        /// ws→RFC1918 / link-local / `.local`: NON-blocking notice — keystrokes
+        /// and output are sniffable on the same LAN; prefer `tailscale serve`.
+        case plaintextLAN
+        /// Public host (http AND https alike, §5.4 table): strongest BLOCKING
+        /// warning — anyone who can reach the port gets a shell.
+        case publicHostBlocking
+
+        var isBlocking: Bool { self == .publicHostBlocking }
+    }
+
+    /// The parsed-but-not-yet-probed target shown on the confirm page.
+    struct PendingHost: Equatable, Sendable {
+        let endpoint: HostEndpoint
+        let warning: SecurityWarning
+
+        /// `scheme://host[:port]` via `HostEndpoint`'s single-point derivation
+        /// (browser-Origin serialization) — NEVER hand-assembled.
+        var displayAddress: String { endpoint.originHeader }
+    }
+
+    /// What the failure UI offers besides the message.
+    enum RecoveryAction: Equatable, Sendable {
+        case retry
+        /// iOS Local Network permission was denied → deep-link to the app's
+        /// Settings pane (its 本地网络 toggle lives there).
+        case openLocalNetworkSettings
+    }
+
+    struct FailureDisplay: Equatable, Sendable {
+        let message: String
+        let action: RecoveryAction
+    }
+
+    enum Phase: Equatable {
+        case idle
+        case confirming(PendingHost)
+        case probing(PendingHost)
+        case failed(PendingHost, FailureDisplay)
+        case paired(HostRegistry.Host)
+    }
+
+    // MARK: - Observable state
+
+    private(set) var phase: Phase = .idle
+    /// Inline rejection copy for invalid scan/manual input (idle-state error).
+    private(set) var inputRejection: String?
+    /// Editable name shown on the confirm page; defaults to the endpoint host
+    /// and falls back to it when the user clears the field.
+    var hostName = ""
+    /// Explicit user acknowledgement for the blocking public-host warning.
+    var hasAcknowledgedPublicRisk = false
+    /// Set when confirm was attempted on a blocking warning WITHOUT the
+    /// acknowledgement — the UI highlights the ack control.
+    private(set) var needsPublicRiskAcknowledgement = false
+    /// Navigate signal: set exactly once when pairing completes (T-iOS-15
+    /// observes it to move on to the session list).
+    private(set) var pairedHost: HostRegistry.Host?
+
+    // MARK: - Dependencies (not observed)
+
+    @ObservationIgnored private let store: any HostStore
+    @ObservationIgnored private let probe: Probe
+
+    init(store: any HostStore, probe: @escaping Probe) {
+        self.store = store
+        self.probe = probe
+    }
+
+    // MARK: - Input boundaries (untrusted, validated via HostEndpoint)
+
+    /// QR scan result (`public/qr.ts` encodes `location.origin`). Strict: the
+    /// payload must already be a full http(s) URL — no scheme inference for
+    /// untrusted external input.
+    func handleScannedCode(_ payload: String) {
+        guard canAcceptNewTarget else { return }
+        let trimmed = payload.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard let url = URL(string: trimmed), let endpoint = HostEndpoint(baseURL: url) else {
+            inputRejection = PairingCopy.scanRejected
+            return
+        }
+        enterConfirming(endpoint)
+    }
+
+    /// Manually typed URL. The user knows what they typed, but it still goes
+    /// through the SAME confirm state (uniform warning tiers — documented
+    /// decision). Convenience: no `://` → `http://` prefix before parsing.
+    func submitManualURL(_ text: String) {
+        guard canAcceptNewTarget else { return }
+        let trimmed = text.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !trimmed.isEmpty else {
+            inputRejection = PairingCopy.manualRejected
+            return
+        }
+        let candidate = trimmed.contains(Self.schemeSeparator)
+            ? trimmed
+            : Self.defaultManualScheme + trimmed
+        guard let url = URL(string: candidate), let endpoint = HostEndpoint(baseURL: url) else {
+            inputRejection = PairingCopy.manualRejected
+            return
+        }
+        enterConfirming(endpoint)
+    }
+
+    /// Back out of confirm/failed to a clean entry state. Never probes.
+    func cancel() {
+        phase = .idle
+        inputRejection = nil
+        hasAcknowledgedPublicRisk = false
+        needsPublicRiskAcknowledgement = false
+    }
+
+    // MARK: - Confirm → probe → store
+
+    /// The ONLY way network starts. No-op unless confirming; a blocking
+    /// warning without explicit acknowledgement refuses and flags the UI.
+    func confirmConnect() async {
+        guard case .confirming(let pending) = phase else { return }
+        if pending.warning.isBlocking && !hasAcknowledgedPublicRisk {
+            needsPublicRiskAcknowledgement = true
+            return
+        }
+        await runProbe(for: pending)
+    }
+
+    /// Re-run the full probe against the same endpoint after a failure.
+    func retry() async {
+        guard case .failed(let pending, _) = phase else { return }
+        await runProbe(for: pending)
+    }
+
+    private var canAcceptNewTarget: Bool {
+        switch phase {
+        case .idle, .confirming, .failed:
+            return true
+        case .probing, .paired:
+            return false
+        }
+    }
+
+    private func enterConfirming(_ endpoint: HostEndpoint) {
+        inputRejection = nil
+        hasAcknowledgedPublicRisk = false
+        needsPublicRiskAcknowledgement = false
+        hostName = endpoint.baseURL.host ?? ""
+        phase = .confirming(PendingHost(
+            endpoint: endpoint, warning: Self.warning(for: endpoint)
+        ))
+    }
+
+    private func runProbe(for pending: PendingHost) async {
+        needsPublicRiskAcknowledgement = false
+        phase = .probing(pending)
+        switch await probe(pending.endpoint) {
+        case .failure(let error):
+            phase = .failed(pending, Self.display(for: error))
+        case .success(let endpoint):
+            await storePairedHost(endpoint: endpoint, pending: pending)
+        }
+    }
+
+    /// §3.4 ruling: `Host{id,name}` is constructed here, from the PROBED
+    /// endpoint. A store failure is surfaced explicitly (never swallowed);
+    /// retry re-runs the whole confirm flow.
+    private func storePairedHost(endpoint: HostEndpoint, pending: PendingHost) async {
+        let trimmedName = hostName.trimmingCharacters(in: .whitespacesAndNewlines)
+        let fallbackName = endpoint.baseURL.host ?? endpoint.originHeader
+        let host = HostRegistry.Host(
+            id: UUID(),
+            name: trimmedName.isEmpty ? fallbackName : trimmedName,
+            endpoint: endpoint
+        )
+        do {
+            _ = try await store.upsert(host)
+        } catch {
+            phase = .failed(pending, FailureDisplay(
+                message: PairingCopy.storeFailed, action: .retry
+            ))
+            return
+        }
+        pairedHost = host
+        phase = .paired(host)
+    }
+
+    // MARK: - PairingError → copy + action (task RED list, one case each)
+
+    static func display(for error: PairingError) -> FailureDisplay {
+        switch error {
+        case .localNetworkDenied:
+            return FailureDisplay(
+                message: PairingCopy.localNetworkDenied, action: .openLocalNetworkSettings
+            )
+        case .hostUnreachable(let underlying):
+            return FailureDisplay(
+                message: PairingCopy.hostUnreachable(underlying), action: .retry
+            )
+        case .httpOkButNotWebTerminal:
+            return FailureDisplay(message: PairingCopy.notWebTerminal, action: .retry)
+        case .originRejected(let hint):
+            // The probe already derived the complete actionable copy from
+            // endpoint.originHeader — surface it VERBATIM, never re-derive.
+            return FailureDisplay(message: hint, action: .retry)
+        case .atsBlocked(let host):
+            return FailureDisplay(message: PairingCopy.atsBlocked(host: host), action: .retry)
+        case .tlsFailure:
+            return FailureDisplay(message: PairingCopy.tlsFailure, action: .retry)
+        case .timeout:
+            return FailureDisplay(message: PairingCopy.timeout, action: .retry)
+        }
+    }
+
+    // MARK: - §5.4 warning tiers
+
+    /// Decide the confirm-page warning from scheme + host class. Public hosts
+    /// block regardless of scheme (§5.4 table: https is included in the
+    /// public-host confirm warning); otherwise https clears every notice.
+    static func warning(for endpoint: HostEndpoint) -> SecurityWarning {
+        let hostClass = classifyHost(endpoint.baseURL.host ?? "")
+        if hostClass == .publicHost {
+            return .publicHostBlocking
+        }
+        if endpoint.baseURL.scheme?.lowercased() == Self.httpsScheme {
+            return .none
+        }
+        switch hostClass {
+        case .loopback:
+            return .none
+        case .tailscale:
+            return .tailscaleEncrypted
+        case .privateLAN:
+            return .plaintextLAN
+        case .publicHost:
+            return .publicHostBlocking // unreachable; keeps the switch total
+        }
+    }
+
+    /// Address classes relevant to §5.4. NOTE: near-duplicate of APIClient's
+    /// internal `isPrivateOrLocalHost` (finer-grained here) — T-iOS-38 dedup.
+    enum HostClass: Equatable, Sendable {
+        case loopback
+        case tailscale
+        case privateLAN
+        case publicHost
+    }
+
+    static func classifyHost(_ rawHost: String) -> HostClass {
+        let host = rawHost.lowercased()
+            .trimmingCharacters(in: CharacterSet(charactersIn: "[]")) // IPv6 brackets
+        if host == Self.localhostName {
+            return .loopback
+        }
+        if host.hasSuffix(Self.tailscaleMagicDNSSuffix) {
+            return .tailscale
+        }
+        if host.hasSuffix(Self.mdnsSuffix) {
+            return .privateLAN
+        }
+        if let octets = ipv4Octets(host) {
+            return classifyIPv4(octets)
+        }
+        if host.contains(":") {
+            return classifyIPv6(host)
+        }
+        return .publicHost
+    }
+
+    private static func classifyIPv4(_ octets: [Int]) -> HostClass {
+        switch (octets[0], octets[1]) {
+        case (127, _):
+            return .loopback
+        case (10, _), (192, 168), (169, 254):
+            return .privateLAN // RFC1918 10/8, 192.168/16 · link-local 169.254/16
+        case (172, 16...31):
+            return .privateLAN // RFC1918 172.16/12
+        case (100, 64...127):
+            return .tailscale // CGNAT 100.64/10
+        default:
+            return .publicHost
+        }
+    }
+
+    private static func classifyIPv6(_ host: String) -> HostClass {
+        if host == Self.ipv6Loopback {
+            return .loopback
+        }
+        let isLinkLocal = host.hasPrefix(Self.ipv6LinkLocalPrefix)
+        let isULA = host.hasPrefix("fc") || host.hasPrefix("fd") // fc00::/7
+        return (isLinkLocal || isULA) ? .privateLAN : .publicHost
+    }
+
+    private static func ipv4Octets(_ host: String) -> [Int]? {
+        let parts = host.split(separator: ".", omittingEmptySubsequences: false)
+        guard parts.count == Self.ipv4OctetCount else { return nil }
+        let octets = parts.compactMap { Int($0) }
+        guard octets.count == Self.ipv4OctetCount,
+              octets.allSatisfy({ Self.ipv4OctetRange.contains($0) })
+        else { return nil }
+        return octets
+    }
+
+    // MARK: - Named constants (no magic values, plan §4)
+
+    private static let schemeSeparator = "://"
+    private static let defaultManualScheme = "http://"
+    private static let httpsScheme = "https"
+    private static let localhostName = "localhost"
+    private static let tailscaleMagicDNSSuffix = ".ts.net"
+    private static let mdnsSuffix = ".local"
+    private static let ipv6Loopback = "::1"
+    private static let ipv6LinkLocalPrefix = "fe80"
+    private static let ipv4OctetCount = 4
+    private static let ipv4OctetRange = 0...255
+}
+
+/// User-facing pairing copy (plan §3.4 taxonomy → actionable wording; §5.2
+/// Local-Network guidance including the iOS 18 restart caveat).
+enum PairingCopy {
+    static let scanRejected =
+        "二维码不是 http(s) 地址，无法配对。请扫描 web 终端工具栏「Connect a device」弹出的二维码。"
+    static let manualRejected =
+        "无法解析这个地址。请输入完整 URL，例如 http://192.168.1.5:3000"
+    static let storeFailed =
+        "主机已通过验证，但保存到本机失败，请重试。"
+    static let localNetworkDenied =
+        "无法访问本地网络——「本地网络」权限可能被拒绝。请到 设置 → 隐私与安全性 → 本地网络 打开 WebTerm 的开关"
+        + "（iOS 18 存在需要重启手机才生效的已知问题）。"
+    static let notWebTerminal =
+        "对方在响应 HTTP，但不是 web-terminal——端口对吗？"
+    static let tlsFailure =
+        "TLS 连接失败：证书无效或不受信任。"
+    static let timeout =
+        "连接超时。请确认主机在线、与手机在同一网络后重试。"
+
+    static func hostUnreachable(_ underlying: String) -> String {
+        "无法连接主机：\(underlying)"
+    }
+
+    /// §3.4 wording for the ATS cleartext block.
+    static func atsBlocked(host: String) -> String {
+        "明文 HTTP 被 ATS 拦截——\(host) 所在 IP 段不在 App 例外列表内，"
+        + "请改用 https / tailscale serve，或反馈该网段。"
+    }
+}

ios/App/WebTerm/ViewModels/SessionListViewModel.swift

@@ -0,0 +1,351 @@
+import APIClient
+import Foundation
+import HostRegistry
+import Observation
+import WireProtocol
+
+/// T-iOS-13 · Session list state (merged chooser + dashboard, plan §7):
+/// one glance answers "do I need to step in?" — status dot / ⚠ pending badge,
+/// telemetry chips with staleness, swipe-to-kill, and the navigation signal
+/// into `TerminalScreen`.
+///
+/// Polling: while the screen is visible, `GET /live-sessions` every
+/// `Tunables.listPollInterval` (mirrors public/launcher.ts `REFRESH_MS`),
+/// paced on an injected `Clock` (FakeClock in tests — zero real waits).
+/// `disappeared()` cancels the poll task; the leak test asserts the parked
+/// sleeper is reclaimed.
+///
+/// Documented decisions:
+/// - **Pending ⚠ is an overlay, not a list field**: `LiveSessionInfo`
+///   (src/types.ts:246-256) carries NO `pending` — that signal only exists on
+///   the WS status side-channel (the server's pendingApprovals), exactly like
+///   the web dashboard reads it from attached tabs (public/tabs.ts snapshot()).
+///   The T-iOS-15 wiring forwards gate/status events into
+///   `setPendingApproval`; this VM owns the merge and the badge PRIORITY.
+/// - **Kill is optimistic via a hidden-id set**: rows derive from the last
+///   fetch minus `hiddenKilledIds`, so rollback restores the exact original
+///   position, and a poll racing the DELETE cannot resurrect the row. A 404
+///   on DELETE means "already gone" and counts as success.
+/// - **A failed poll never wipes the list**: stale rows + explicit copy beat
+///   a blank screen on one dropped packet.
+@MainActor
+@Observable
+final class SessionListViewModel {
+    // MARK: - Row model
+
+    /// What the row leads with: the held-approval badge outranks the dot.
+    enum StatusIndicator: Equatable, Sendable {
+        case pendingApproval
+        case status(ClaudeStatus)
+
+        /// Mirrors public/tabs.ts:74-80 `claudeIcon`; ⚠ for a held approval.
+        var glyph: String {
+            switch self {
+            case .pendingApproval: return "⚠"
+            case .status(.working): return "⚙"
+            case .status(.waiting): return "⏳"
+            case .status(.idle): return "✓"
+            case .status(.stuck): return "⚠"
+            case .status(.unknown): return ""
+            }
+        }
+    }
+
+    /// Immutable render snapshot of one session (rebuilt wholesale per fetch).
+    struct SessionRow: Equatable, Identifiable, Sendable {
+        let info: LiveSessionInfo
+        let isPendingApproval: Bool
+        let telemetry: TelemetryChips.Model?
+
+        var id: UUID { info.id }
+        var indicator: StatusIndicator {
+            isPendingApproval ? .pendingApproval : .status(info.status)
+        }
+    }
+
+    /// Navigation signal consumed by the T-iOS-15 wiring. `sessionId == nil`
+    /// = "+ New session" (`attach(null)` downstream). A fresh `id` per request
+    /// means repeated taps re-fire `onChange` observers.
+    struct OpenRequest: Equatable, Sendable, Identifiable {
+        let id: UUID
+        let host: HostRegistry.Host
+        let sessionId: UUID?
+    }
+
+    enum EmptyState: Equatable {
+        /// No hosts in the store — pairing is the only next step.
+        case notPaired
+        /// Paired + fetched successfully, but nothing is running.
+        case noSessions
+    }
+
+    // MARK: - Observable state
+
+    private(set) var hosts: [HostRegistry.Host] = []
+    private(set) var activeHost: HostRegistry.Host?
+    private(set) var rows: [SessionRow] = []
+    /// Last poll failed (stale rows stay visible). Cleared by the next success.
+    private(set) var fetchErrorMessage: String?
+    /// Last kill failed (row already rolled back).
+    private(set) var killErrorMessage: String?
+    /// Host store read failed — explicit, never a silent empty list.
+    private(set) var hostsErrorMessage: String?
+    private(set) var openRequest: OpenRequest?
+
+    var emptyState: EmptyState? {
+        if hasAttemptedHostLoad && hosts.isEmpty { return .notPaired }
+        if hasLoadedOnce && rows.isEmpty && fetchErrorMessage == nil { return .noSessions }
+        return nil
+    }
+
+    // MARK: - Dependencies & internal state (not observed)
+
+    @ObservationIgnored private let hostStore: any HostStore
+    @ObservationIgnored private let http: any HTTPTransport
+    @ObservationIgnored private let clock: any Clock<Duration>
+    /// Injected time source for telemetry staleness (ms since epoch).
+    @ObservationIgnored private let nowMs: @Sendable () -> Int
+    @ObservationIgnored private var pollTask: Task<Void, Never>?
+    @ObservationIgnored private var latestFetched: [LiveSessionInfo] = []
+    @ObservationIgnored private var hiddenKilledIds: Set<UUID> = []
+    @ObservationIgnored private var pendingSessionIds: Set<UUID> = []
+    @ObservationIgnored private var hasAttemptedHostLoad = false
+    @ObservationIgnored private var hasLoadedOnce = false
+
+    private var apiClient: APIClient? {
+        activeHost.map { APIClient(endpoint: $0.endpoint, http: http) }
+    }
+
+    init(
+        hostStore: any HostStore,
+        http: any HTTPTransport,
+        clock: any Clock<Duration>,
+        nowMs: @escaping @Sendable () -> Int = SessionListViewModel.currentTimeMs
+    ) {
+        self.hostStore = hostStore
+        self.http = http
+        self.clock = clock
+        self.nowMs = nowMs
+    }
+
+    // MARK: - Visibility lifecycle (poll task owner)
+
+    /// Screen became visible: load hosts, then poll every `listPollInterval`.
+    /// Idempotent — a second call while polling is a no-op.
+    func appeared() {
+        guard pollTask == nil else { return }
+        pollTask = Task { [weak self] in
+            await self?.runPollLoop()
+        }
+    }
+
+    /// Screen left: cancel the poll task (its parked sleep throws
+    /// `CancellationError` and the loop exits — no leaked timer).
+    func disappeared() {
+        pollTask?.cancel()
+        pollTask = nil
+        releaseFetchWaiters()
+    }
+
+    private func runPollLoop() async {
+        await reloadHosts()
+        while !Task.isCancelled {
+            await refreshOnce()
+            do {
+                try await clock.sleep(for: Tunables.listPollInterval, tolerance: nil)
+            } catch {
+                return // cancelled while parked — the only way sleep throws
+            }
+        }
+    }
+
+    // MARK: - Hosts (multi-host header hook)
+
+    /// (Re)read the paired hosts. Also called by the T-iOS-15 wiring after the
+    /// pairing sheet adds one. Keeps `activeHost` if it still exists (picking
+    /// up renames), else falls back to the first host.
+    func reloadHosts() async {
+        do {
+            hosts = try await hostStore.loadAll()
+            hostsErrorMessage = nil
+        } catch {
+            hosts = []
+            hostsErrorMessage = SessionListCopy.hostsLoadFailed
+        }
+        hasAttemptedHostLoad = true
+        activeHost = hosts.first(where: { $0.id == activeHost?.id }) ?? hosts.first
+    }
+
+    /// Switch the list to another paired host: reset per-host state and fetch
+    /// immediately (the poll loop keeps its own cadence).
+    func selectHost(id: UUID) async {
+        guard let host = hosts.first(where: { $0.id == id }),
+              host.id != activeHost?.id else { return }
+        activeHost = host
+        latestFetched = []
+        hiddenKilledIds = []
+        pendingSessionIds = []
+        hasLoadedOnce = false
+        fetchErrorMessage = nil
+        killErrorMessage = nil
+        rebuildRows()
+        await refreshOnce()
+    }
+
+    // MARK: - Fetch (poll tick + pull-to-refresh share one path)
+
+    /// Manual refresh (pull-to-refresh).
+    func refresh() async {
+        await refreshOnce()
+    }
+
+    private func refreshOnce() async {
+        defer {
+            completedFetchCount += 1
+            resumeFetchWaiters()
+        }
+        guard let client = apiClient else { return }
+        do {
+            let sessions = try await client.liveSessions()
+            let fetchedIds = Set(sessions.map(\.id))
+            latestFetched = sessions
+            // Prune overlays for sessions the server no longer reports.
+            hiddenKilledIds = hiddenKilledIds.intersection(fetchedIds)
+            pendingSessionIds = pendingSessionIds.intersection(fetchedIds)
+            fetchErrorMessage = nil
+            hasLoadedOnce = true
+        } catch {
+            // Keep the stale rows — a blank list on one dropped poll is worse.
+            fetchErrorMessage = SessionListCopy.fetchFailed(Self.errorDetail(error))
+        }
+        rebuildRows()
+    }
+
+    // MARK: - Pending ⚠ overlay (fed by the WS status side-channel, T-iOS-15)
+
+    func setPendingApproval(sessionId: UUID, pending: Bool) {
+        pendingSessionIds = pending
+            ? pendingSessionIds.union([sessionId])
+            : pendingSessionIds.subtracting([sessionId])
+        rebuildRows()
+    }
+
+    // MARK: - Swipe-to-kill (optimistic + rollback)
+
+    func kill(sessionId: UUID) async {
+        guard let client = apiClient,
+              latestFetched.contains(where: { $0.id == sessionId }) else { return }
+        killErrorMessage = nil
+        hiddenKilledIds = hiddenKilledIds.union([sessionId]) // optimistic removal
+        rebuildRows()
+        do {
+            try await client.killSession(id: sessionId)
+        } catch APIClientError.sessionNotFound {
+            // Already gone (exited/reaped/killed elsewhere) — removal stands.
+        } catch {
+            hiddenKilledIds = hiddenKilledIds.subtracting([sessionId]) // rollback
+            rebuildRows()
+            killErrorMessage = SessionListCopy.killFailed(Self.errorDetail(error))
+        }
+    }
+
+    // MARK: - Navigation signals
+
+    /// "+ New session" → `sessionId: nil` (server spawns a fresh PTY).
+    func requestNewSession() {
+        guard let activeHost else { return }
+        openRequest = OpenRequest(id: UUID(), host: activeHost, sessionId: nil)
+    }
+
+    /// Open a listed session. Unknown ids are refused at the boundary.
+    func openSession(id: UUID) {
+        guard let activeHost, rows.contains(where: { $0.id == id }) else { return }
+        openRequest = OpenRequest(id: UUID(), host: activeHost, sessionId: id)
+    }
+
+    // MARK: - Row derivation (immutable rebuild, single owner)
+
+    private func rebuildRows() {
+        let visible = latestFetched.filter { !hiddenKilledIds.contains($0.id) }
+        let now = nowMs()
+        rows = Self.groupingExitedLast(visible).map { info in
+            SessionRow(
+                info: info,
+                isPendingApproval: pendingSessionIds.contains(info.id),
+                telemetry: TelemetryChips.Model(telemetry: info.telemetry, nowMs: now)
+            )
+        }
+    }
+
+    /// Keep the server's order (newest-first, src/session/manager.ts:194) but
+    /// group `exited:true` at the bottom — order preserved inside each group.
+    static func groupingExitedLast(_ sessions: [LiveSessionInfo]) -> [LiveSessionInfo] {
+        sessions.filter { !$0.exited } + sessions.filter(\.exited)
+    }
+
+    // MARK: - Error copy helpers
+
+    /// `APIClientError` already carries user-facing copy; transport-level
+    /// errors fall back to their localized description.
+    private static func errorDetail(_ error: any Error) -> String {
+        (error as? APIClientError)?.message ?? error.localizedDescription
+    }
+
+    private nonisolated static let millisecondsPerSecond = 1_000.0
+
+    nonisolated static func currentTimeMs() -> Int {
+        Int(Date().timeIntervalSince1970 * millisecondsPerSecond)
+    }
+
+    // MARK: - Deterministic test barriers (same pattern as TerminalViewModel)
+
+    /// Completed fetch attempts (successful or not, including no-host ticks).
+    @ObservationIgnored private(set) var completedFetchCount = 0
+
+    private struct CountWaiter {
+        let target: Int
+        let continuation: CheckedContinuation<Void, Never>
+    }
+
+    @ObservationIgnored private var fetchWaiters: [CountWaiter] = []
+
+    /// Suspends until at least `count` fetches have completed.
+    func waitUntilFetches(count target: Int) async {
+        await withCheckedContinuation { continuation in
+            guard completedFetchCount < target else {
+                continuation.resume()
+                return
+            }
+            fetchWaiters = fetchWaiters + [CountWaiter(target: target, continuation: continuation)]
+        }
+    }
+
+    private func resumeFetchWaiters() {
+        let satisfied = fetchWaiters.filter { $0.target <= completedFetchCount }
+        fetchWaiters = fetchWaiters.filter { $0.target > completedFetchCount }
+        for waiter in satisfied {
+            waiter.continuation.resume()
+        }
+    }
+
+    private func releaseFetchWaiters() {
+        let all = fetchWaiters
+        fetchWaiters = []
+        for waiter in all {
+            waiter.continuation.resume()
+        }
+    }
+}
+
+/// User-facing session-list copy (plan §4: explicit errors, actionable 话术).
+enum SessionListCopy {
+    static let hostsLoadFailed = "读取已配对主机失败，请关闭本页后重进。"
+
+    static func fetchFailed(_ detail: String) -> String {
+        "刷新会话列表失败：\(detail)"
+    }
+
+    static func killFailed(_ detail: String) -> String {
+        "结束会话失败：\(detail)"
+    }
+}

ios/App/WebTerm/ViewModels/TerminalViewModel.swift

@@ -0,0 +1,301 @@
+import Foundation
+import Observation
+import SessionCore
+import WireProtocol
+
+/// Terminal screen state (T-iOS-11, plan §3.5): consumes the engine's
+/// `SessionEvent` stream on the MainActor and turns it into UI state — output
+/// forwarded to SwiftTerm, connection banner, non-retryable failure copy and
+/// the read-only exit state. All outbound traffic (key bar, hardware key
+/// commands, SwiftTerm delegate) funnels through here into ONE ordered queue.
+///
+/// Testability / stream-sharing decision (documented per task brief):
+/// `engine.events` is a single-consumer `AsyncStream`, and GateViewModel
+/// (T-iOS-14) must eventually observe `.gate`/`.digest` from the SAME stream.
+/// So the events stream is injected SEPARATELY from the engine: today callers
+/// pass `engine.events` verbatim (tests do exactly that, over
+/// `TestSupport.FakeTransport`); the T-iOS-15 wiring may pass a fan-out branch
+/// instead without touching this class.
+///
+/// Swift 6 strict concurrency: the class is `@MainActor`, the terminal sink is
+/// `@MainActor`-typed — `feed()` off the main actor cannot compile.
+@MainActor
+@Observable
+final class TerminalViewModel {
+    // MARK: - UI state model
+
+    /// Connection banner state (mirrors the web client's status line:
+    /// public/terminal-session.ts `SessionStatus`).
+    enum ConnectionBanner: Equatable {
+        case none
+        case connecting
+        /// Retry `attempt` fires after `next` (ReconnectMachine ladder 1s→30s).
+        case reconnecting(attempt: Int, next: Duration)
+    }
+
+    /// Which terminal the user is looking at: a live one, a dead-for-good one
+    /// (non-retryable failure), or a finished one (read-only).
+    enum TerminalPhase: Equatable {
+        case live
+        /// Non-retryable terminal failure — actionable copy instead of a spinner.
+        case failed(message: String)
+        /// The shell exited; the terminal stays readable but accepts no input.
+        case exited(code: Int, reason: String?)
+    }
+
+    /// Actionable copy for `.failed(.replayTooLarge)` (plan §3.2 / §3.2.1
+    /// coupling warning): reconnecting would deterministically fail forever,
+    /// so the user must change a knob, not wait.
+    static let replayTooLargeMessage =
+        "服务器 scrollback 超过客户端上限，请调低 SCROLLBACK_BYTES 或调高客户端上限"
+
+    private(set) var banner: ConnectionBanner = .none
+    private(set) var phase: TerminalPhase = .live
+    /// Server-adopted session id (ALWAYS the server-issued one — persisting it
+    /// per host is the T-iOS-15 wiring's job via `LastSessionStore`).
+    private(set) var sessionId: UUID?
+
+    /// Read-only = no input reaches the PTY (exit / terminal failure). Resize
+    /// is NOT gated here — the engine owns terminal-state dropping.
+    var isReadOnly: Bool { phase != .live }
+
+    /// Single render input for `ReconnectBanner`: terminal phases win over
+    /// transient connection states.
+    var bannerModel: ReconnectBanner.Model? {
+        switch phase {
+        case .failed(let message):
+            return .failed(message: message)
+        case .exited(let code, let reason):
+            return .exited(code: code, reason: reason)
+        case .live:
+            break
+        }
+        switch banner {
+        case .none:
+            return nil
+        case .connecting:
+            return .connecting
+        case .reconnecting(let attempt, let next):
+            return .reconnecting(attempt: attempt, retryIn: next)
+        }
+    }
+
+    // MARK: - Dependencies & plumbing (not observed)
+
+    @ObservationIgnored private let engine: SessionEngine
+    @ObservationIgnored private let events: AsyncStream<SessionEvent>
+    @ObservationIgnored private var consumeTask: Task<Void, Never>?
+    /// Where output bytes go (SwiftTerm's `feed(text:)`). `@MainActor`-typed:
+    /// feeding off the main actor is a compile error.
+    @ObservationIgnored private var terminalSink: (@MainActor (String) -> Void)?
+    /// Output that arrived before the SwiftTerm view existed; flushed in order
+    /// the moment the sink attaches (replay must never be dropped).
+    @ObservationIgnored private var pendingOutput: [String] = []
+    /// Ordered outbound queue: UIKit callbacks are synchronous, `engine.send`
+    /// is async — one pump task preserves submission order (two quick key taps
+    /// must never race each other onto the wire).
+    @ObservationIgnored private var sendQueue: [ClientMessage] = []
+    @ObservationIgnored private var isPumping = false
+
+    // MARK: - Test-visible diagnostics & deterministic barriers (internal)
+
+    /// Events applied so far — `waitUntilProcessed` barrier counter.
+    @ObservationIgnored private(set) var processedEventCount = 0
+    /// Sends handed to the engine so far — `waitUntilForwarded` barrier counter.
+    @ObservationIgnored private(set) var forwardedSendCount = 0
+    /// Input dropped because the terminal is read-only (exit/failed).
+    @ObservationIgnored private(set) var droppedReadOnlyInputCount = 0
+    /// Test tap, called after each event is applied (state already coherent).
+    @ObservationIgnored var onEventApplied: (@MainActor (SessionEvent) -> Void)?
+
+    private struct CountWaiter {
+        let target: Int
+        let continuation: CheckedContinuation<Void, Never>
+    }
+
+    @ObservationIgnored private var eventWaiters: [CountWaiter] = []
+    @ObservationIgnored private var sendWaiters: [CountWaiter] = []
+
+    // MARK: - Lifecycle
+
+    /// - Parameters:
+    ///   - engine: send-side dependency (`send` only — `open`/`close` belong to
+    ///     the T-iOS-15 wiring that constructs the engine).
+    ///   - events: the event stream to consume; pass `engine.events` unless a
+    ///     fan-out branch is needed (see type doc).
+    init(engine: SessionEngine, events: AsyncStream<SessionEvent>) {
+        self.engine = engine
+        self.events = events
+    }
+
+    /// Begin consuming events. Idempotent — a second call is a no-op (the
+    /// stream has exactly one consumer).
+    func start() {
+        guard consumeTask == nil else { return }
+        consumeTask = Task { [weak self] in
+            guard let events = self?.events else { return }
+            for await event in events {
+                guard let self else { return }
+                self.apply(event)
+            }
+            self?.releaseAllWaiters() // stream over — never leave a test hanging
+        }
+    }
+
+    /// Stop consuming (screen torn down). Does NOT close the engine — detach
+    /// vs. keep-running is the T-iOS-15 lifecycle owner's call.
+    func stop() {
+        consumeTask?.cancel()
+        consumeTask = nil
+        releaseAllWaiters()
+    }
+
+    // MARK: - Terminal output sink
+
+    /// Attach the SwiftTerm feed target. Buffered output (anything that
+    /// arrived before the view existed) flushes immediately, in order.
+    func attachTerminalSink(_ sink: @escaping @MainActor (String) -> Void) {
+        terminalSink = sink
+        let buffered = pendingOutput
+        pendingOutput = []
+        for chunk in buffered {
+            sink(chunk)
+        }
+    }
+
+    // MARK: - Outbound (KeyBar / UIKeyCommand / SwiftTerm delegate)
+
+    /// Key-bar or hardware key press: bytes resolved through `KeyByteMap`
+    /// (the single source of truth — plan §7 T-iOS-11).
+    func send(key: KeyByteMap.Key) {
+        sendInput(KeyByteMap.bytes(for: key))
+    }
+
+    /// Raw input bytes, verbatim (invariant #9 — no content filtering).
+    /// Dropped (and counted) while the terminal is read-only.
+    func sendInput(_ data: String) {
+        guard !isReadOnly else {
+            droppedReadOnlyInputCount += 1
+            return
+        }
+        enqueueSend(.input(data: data))
+    }
+
+    /// Terminal geometry changed (SwiftTerm `sizeChanged`). Always forwarded —
+    /// the engine validates bounds and owns terminal-state dropping.
+    func sendResize(cols: Int, rows: Int) {
+        enqueueSend(.resize(cols: cols, rows: rows))
+    }
+
+    // MARK: - Event application (single consumer, MainActor)
+
+    private func apply(_ event: SessionEvent) {
+        switch event {
+        case .connection(let state):
+            applyConnection(state)
+        case .adopted(let id):
+            sessionId = id // ALWAYS adopt the server-issued id
+        case .output(let data):
+            deliverOutput(data)
+        case .exited(let code, let reason):
+            phase = .exited(code: code, reason: reason)
+        case .gate, .telemetry, .digest:
+            break // GateViewModel's domain (T-iOS-14; wired in T-iOS-15)
+        }
+        processedEventCount += 1
+        onEventApplied?(event)
+        resumeEventWaiters()
+    }
+
+    private func applyConnection(_ state: ConnectionState) {
+        switch state {
+        case .connecting:
+            banner = .connecting
+        case .connected:
+            banner = .none
+        case .reconnecting(let attempt, let next):
+            banner = .reconnecting(attempt: attempt, next: next)
+        case .closed:
+            banner = .none // deliberate end; exit/failure phase (if any) stays
+        case .failed(.replayTooLarge):
+            banner = .none
+            phase = .failed(message: Self.replayTooLargeMessage)
+        }
+    }
+
+    private func deliverOutput(_ data: String) {
+        guard let terminalSink else {
+            pendingOutput = pendingOutput + [data]
+            return
+        }
+        terminalSink(data)
+    }
+
+    // MARK: - Ordered send pump
+
+    private func enqueueSend(_ message: ClientMessage) {
+        sendQueue = sendQueue + [message]
+        guard !isPumping else { return }
+        isPumping = true
+        Task { await self.pumpSendQueue() }
+    }
+
+    private func pumpSendQueue() async {
+        while let next = sendQueue.first {
+            sendQueue = Array(sendQueue.dropFirst())
+            await engine.send(next)
+            forwardedSendCount += 1
+            resumeSendWaiters()
+        }
+        isPumping = false
+    }
+
+    // MARK: - Deterministic test barriers (no polling, no real sleeps)
+
+    /// Suspends until at least `eventCount` events have been applied.
+    func waitUntilProcessed(eventCount target: Int) async {
+        await withCheckedContinuation { continuation in
+            guard processedEventCount < target else {
+                continuation.resume()
+                return
+            }
+            eventWaiters = eventWaiters + [CountWaiter(target: target, continuation: continuation)]
+        }
+    }
+
+    /// Suspends until at least `sendCount` messages were handed to the engine.
+    func waitUntilForwarded(sendCount target: Int) async {
+        await withCheckedContinuation { continuation in
+            guard forwardedSendCount < target else {
+                continuation.resume()
+                return
+            }
+            sendWaiters = sendWaiters + [CountWaiter(target: target, continuation: continuation)]
+        }
+    }
+
+    private func resumeEventWaiters() {
+        let satisfied = eventWaiters.filter { $0.target <= processedEventCount }
+        eventWaiters = eventWaiters.filter { $0.target > processedEventCount }
+        for waiter in satisfied {
+            waiter.continuation.resume()
+        }
+    }
+
+    private func resumeSendWaiters() {
+        let satisfied = sendWaiters.filter { $0.target <= forwardedSendCount }
+        sendWaiters = sendWaiters.filter { $0.target > forwardedSendCount }
+        for waiter in satisfied {
+            waiter.continuation.resume()
+        }
+    }
+
+    private func releaseAllWaiters() {
+        let all = eventWaiters + sendWaiters
+        eventWaiters = []
+        sendWaiters = []
+        for waiter in all {
+            waiter.continuation.resume()
+        }
+    }
+}

ios/App/WebTermTests/GateViewModelTests.swift

@@ -0,0 +1,402 @@
+import Foundation
+import SessionCore
+import TestSupport
+import Testing
+import WireProtocol
+@testable import WebTerm
+
+/// T-iOS-14 · GateViewModel + gate/digest components (plan §7). All tests run
+/// against a REAL `SessionEngine` over `TestSupport.FakeTransport` +
+/// `FakeClock` (same testability choice as TerminalViewModelTests): the VM
+/// consumes `engine.events` exactly as the T-iOS-15 wiring will — zero real
+/// waits, zero network, and the engine's `GateTracker.canDecide` second-line
+/// guard stays live underneath the VM's first-line tap-epoch guard.
+@MainActor
+@Suite("GateViewModel")
+struct GateViewModelTests {
+    // MARK: - Server-side frame fixtures (untrusted wire input, hand-built JSON)
+
+    private enum ServerFrames {
+        static func attached(_ id: UUID) -> String {
+            #"{"type":"attached","sessionId":"\#(id.uuidString.lowercased())"}"#
+        }
+
+        static func status(pending: Bool, gate: String? = nil, detail: String? = nil) -> String {
+            var fields = ["\"type\":\"status\"", "\"status\":\"working\"", "\"pending\":\(pending)"]
+            if let gate { fields.append("\"gate\":\"\(gate)\"") }
+            if let detail { fields.append("\"detail\":\"\(detail)\"") }
+            return "{\(fields.joined(separator: ","))}"
+        }
+    }
+
+    private struct TestStreamError: Error {}
+
+    // MARK: - Test doubles
+
+    /// Records haptic firings — the "exactly once per gate epoch" probe.
+    @MainActor
+    private final class HapticRecorder: HapticSignaling {
+        private(set) var gateArrivalCount = 0
+        func gateDidArrive() { gateArrivalCount += 1 }
+    }
+
+    // MARK: - Harness
+
+    /// Engine over fakes + the VM under test, wired exactly like production.
+    @MainActor
+    private final class Harness {
+        let transport = FakeTransport()
+        let clock = FakeClock()
+        let haptics = HapticRecorder()
+        let engine: SessionEngine
+        let viewModel: GateViewModel
+
+        init(
+            eventsSource: @escaping @Sendable (UUID) async throws -> [TimelineEvent] = { _ in [] }
+        ) throws {
+            let baseURL = try #require(URL(string: "http://192.168.1.5:3000"))
+            let endpoint = try #require(HostEndpoint(baseURL: baseURL))
+            engine = SessionEngine(
+                transport: transport, clock: clock, endpoint: endpoint,
+                eventsSource: eventsSource
+            )
+            viewModel = GateViewModel(
+                engine: engine, events: engine.events, haptics: haptics, clock: clock
+            )
+            viewModel.start()
+        }
+
+        /// Standard preamble: open → .connecting → .connected → server confirms
+        /// the attach. 3 events reach the VM.
+        func openAndAdopt(_ id: UUID = UUID()) async {
+            await engine.open(sessionId: nil, cwd: nil)
+            await transport.emit(frame: ServerFrames.attached(id))
+            await viewModel.waitUntilProcessed(eventCount: 3)
+        }
+
+        /// Frames the client sent on connection 0 (attach first, then decisions).
+        func wireFrames() async -> [String] {
+            let byConnection = await transport.sentFramesByConnection
+            return byConnection.first ?? []
+        }
+
+        /// Drop the wire, ride the 1s backoff rung, reconnect, re-adopt `id` —
+        /// the away window that makes the engine emit exactly one digest.
+        /// Event count after: 7 (3 preamble + reconnecting + connected +
+        /// adopted + digest).
+        func reconnectForDigest(_ id: UUID) async {
+            await transport.emitError(TestStreamError())
+            await viewModel.waitUntilProcessed(eventCount: 4) // .reconnecting
+            await clock.waitForSleepers(count: 1) // backoff rung parked
+            clock.advance(by: .seconds(1))
+            await transport.emit(frame: ServerFrames.attached(id))
+            await viewModel.waitUntilProcessed(eventCount: 7)
+        }
+    }
+
+    // MARK: - Gate routing (tool → banner, plan → sheet)
+
+    @Test("tool gate → two-button banner state; plan gate → three-way sheet state; lifted → neither")
+    func gateRoutingToolVsPlan() async throws {
+        // Arrange
+        let harness = try Harness()
+        await harness.openAndAdopt()
+
+        // Act: tool gate rises (epoch 1).
+        await harness.transport.emit(
+            frame: ServerFrames.status(pending: true, gate: "tool", detail: "Bash"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+
+        // Assert: banner state only.
+        #expect(harness.viewModel.toolGate == GateState(kind: .tool, detail: "Bash", epoch: 1))
+        #expect(harness.viewModel.planGate == nil)
+
+        // Act: gate lifted.
+        await harness.transport.emit(frame: ServerFrames.status(pending: false))
+        await harness.viewModel.waitUntilProcessed(eventCount: 5)
+
+        // Assert: neither surface renders.
+        #expect(harness.viewModel.toolGate == nil)
+        #expect(harness.viewModel.planGate == nil)
+
+        // Act: plan gate rises (epoch 2).
+        await harness.transport.emit(frame: ServerFrames.status(pending: true, gate: "plan"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 6)
+
+        // Assert: sheet state only.
+        #expect(harness.viewModel.planGate == GateState(kind: .plan, detail: nil, epoch: 2))
+        #expect(harness.viewModel.toolGate == nil)
+    }
+
+    // MARK: - Wire mapping (mirror of public/tabs.ts:345-347 / src/types.ts:84-86)
+
+    @Test("plan three-way maps EXACTLY: Approve+Auto→acceptEdits · Approve+Review→default · Keep Planning→reject — no allowAutoMode gate anywhere")
+    func planThreeWayMappingMirrorsWebClient() async throws {
+        // Arrange: a held plan gate (epoch 1). Note the VM has NO HTTP client
+        // and never consults /config/ui — uiConfig.allowAutoMode is reserved
+        // for a future permission-mode picker (plan §3.1 note).
+        let harness = try Harness()
+        await harness.openAndAdopt()
+        await harness.transport.emit(frame: ServerFrames.status(pending: true, gate: "plan"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+        let epoch = try #require(harness.viewModel.planGate?.epoch)
+
+        // Act: all three choices against the held gate (web sends per click).
+        harness.viewModel.decide(.approveAuto, epoch: epoch)
+        harness.viewModel.decide(.approveReview, epoch: epoch)
+        harness.viewModel.decide(.keepPlanning, epoch: epoch)
+        await harness.viewModel.waitUntilForwarded(decisionCount: 3)
+
+        // Assert: exact wire frames, in order — never raw `auto`.
+        #expect(await harness.wireFrames() == [
+            MessageCodec.encode(.attach(sessionId: nil, cwd: nil)),
+            MessageCodec.encode(.approve(mode: .acceptEdits)),
+            MessageCodec.encode(.approve(mode: .default)),
+            MessageCodec.encode(.reject),
+        ])
+    }
+
+    @Test("tool two-way maps: Approve→approve(mode:nil) · Reject→reject")
+    func toolTwoWayMapping() async throws {
+        // Arrange
+        let harness = try Harness()
+        await harness.openAndAdopt()
+        await harness.transport.emit(
+            frame: ServerFrames.status(pending: true, gate: "tool", detail: "Bash"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+        let epoch = try #require(harness.viewModel.toolGate?.epoch)
+
+        // Act
+        harness.viewModel.decide(.approve, epoch: epoch)
+        harness.viewModel.decide(.reject, epoch: epoch)
+        await harness.viewModel.waitUntilForwarded(decisionCount: 2)
+
+        // Assert: bare approve (no mode key) then reject.
+        #expect(await harness.wireFrames() == [
+            MessageCodec.encode(.attach(sessionId: nil, cwd: nil)),
+            MessageCodec.encode(.approve(mode: nil)),
+            MessageCodec.encode(.reject),
+        ])
+    }
+
+    // MARK: - Tap-epoch guard (first line; engine canDecide is the second)
+
+    @Test("a tap carrying a stale epoch is dropped and never sent — a slow tap must not approve the NEXT gate")
+    func staleEpochTapIsDroppedNotSent() async throws {
+        // Arrange
+        let harness = try Harness()
+        await harness.openAndAdopt()
+
+        // Act: tap before any gate ever rose → dropped.
+        harness.viewModel.decide(.approve, epoch: 0)
+        #expect(harness.viewModel.droppedStaleDecisionCount == 1)
+
+        // Arrange: gate 1 rises, resolves, gate 2 rises (the dangerous window).
+        await harness.transport.emit(frame: ServerFrames.status(pending: true, gate: "tool"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+        await harness.transport.emit(frame: ServerFrames.status(pending: false))
+        await harness.viewModel.waitUntilProcessed(eventCount: 5)
+        await harness.transport.emit(frame: ServerFrames.status(pending: true, gate: "tool"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 6)
+
+        // Act: a tap rendered against gate 1 lands now → dropped, not sent.
+        harness.viewModel.decide(.approve, epoch: 1)
+        #expect(harness.viewModel.droppedStaleDecisionCount == 2)
+        #expect(harness.viewModel.forwardedDecisionCount == 0)
+
+        // Act: a fresh tap against the CURRENT gate (epoch 2) goes through.
+        harness.viewModel.decide(.approve, epoch: 2)
+        await harness.viewModel.waitUntilForwarded(decisionCount: 1)
+
+        // Assert: exactly one approve ever reached the wire.
+        #expect(await harness.wireFrames() == [
+            MessageCodec.encode(.attach(sessionId: nil, cwd: nil)),
+            MessageCodec.encode(.approve(mode: nil)),
+        ])
+    }
+
+    @Test("same-epoch kind morph (tool→plan sustained refresh): the tool tap is dropped, the plan choice goes through")
+    func kindMorphSameEpochDropsForeignAffordance() async throws {
+        // Arrange: tool gate epoch 1, then a sustained-pending refresh flips
+        // the kind to plan WITHOUT minting a new epoch (GateTracker semantics).
+        let harness = try Harness()
+        await harness.openAndAdopt()
+        await harness.transport.emit(
+            frame: ServerFrames.status(pending: true, gate: "tool", detail: "Bash"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+        await harness.transport.emit(frame: ServerFrames.status(pending: true, gate: "plan"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 5)
+        #expect(harness.viewModel.planGate?.epoch == 1)
+
+        // Act: the tap rendered on the old TOOL banner is no longer an offered
+        // affordance — dropped even though the epoch still matches.
+        harness.viewModel.decide(.approve, epoch: 1)
+        #expect(harness.viewModel.droppedStaleDecisionCount == 1)
+
+        // Act: a choice from the CURRENT plan sheet goes through.
+        harness.viewModel.decide(.approveAuto, epoch: 1)
+        await harness.viewModel.waitUntilForwarded(decisionCount: 1)
+
+        // Assert
+        #expect(await harness.wireFrames() == [
+            MessageCodec.encode(.attach(sessionId: nil, cwd: nil)),
+            MessageCodec.encode(.approve(mode: .acceptEdits)),
+        ])
+    }
+
+    // MARK: - Haptics (exactly once per gate epoch)
+
+    @Test("haptic fires exactly once per gate epoch — sustained refreshes and lifts never re-buzz")
+    func hapticFiresExactlyOncePerGateEpoch() async throws {
+        // Arrange
+        let harness = try Harness()
+        await harness.openAndAdopt()
+        #expect(harness.haptics.gateArrivalCount == 0)
+
+        // Act: rising edge mints epoch 1 → one buzz.
+        await harness.transport.emit(
+            frame: ServerFrames.status(pending: true, gate: "tool", detail: "Bash"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+        #expect(harness.haptics.gateArrivalCount == 1)
+
+        // Act: sustained-pending refresh (same epoch, new detail) → NO re-buzz.
+        await harness.transport.emit(
+            frame: ServerFrames.status(pending: true, gate: "tool", detail: "Read"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 5)
+        #expect(harness.haptics.gateArrivalCount == 1)
+
+        // Act: gate lifted → no buzz for a nil gate.
+        await harness.transport.emit(frame: ServerFrames.status(pending: false))
+        await harness.viewModel.waitUntilProcessed(eventCount: 6)
+        #expect(harness.haptics.gateArrivalCount == 1)
+
+        // Act: a NEW gate (epoch 2) → second buzz.
+        await harness.transport.emit(frame: ServerFrames.status(pending: true, gate: "plan"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 7)
+        #expect(harness.haptics.gateArrivalCount == 2)
+    }
+
+    // MARK: - Away digest (render / fade / expand)
+
+    @Test("non-zero digest renders the summary state; the all-zero digest renders nothing and parks no fade timer")
+    func digestNonZeroRendersAndAllZeroDoesNot() async throws {
+        // Arrange: one away-window event (far-future `at` passes the `since`
+        // filter; the engine stamps the disconnect moment with the real Date).
+        let sessionId = UUID()
+        let awayEvent = TimelineEvent(
+            at: Int.max / 2, class: "tool", toolName: "Bash", label: "ran Bash")
+        let harness = try Harness(eventsSource: { _ in [awayEvent] })
+        await harness.openAndAdopt(sessionId)
+
+        // Act
+        await harness.reconnectForDigest(sessionId)
+
+        // Assert: summary state set, collapsed by default.
+        #expect(harness.viewModel.digest == AwayDigest(
+            toolRuns: 1, waitingCount: 0, sawDone: false, sawStuck: false,
+            recent: [awayEvent]))
+        #expect(!harness.viewModel.isDigestExpanded)
+
+        // Arrange/Act: an empty away timeline → `.digest(.empty)`.
+        let empty = try Harness(eventsSource: { _ in [] })
+        await empty.openAndAdopt(sessionId)
+        await empty.reconnectForDigest(sessionId)
+
+        // Assert: nothing rendered, and no fade timer was ever scheduled.
+        #expect(empty.viewModel.digest == nil)
+        #expect(empty.clock.pendingSleeperCount == 0)
+    }
+
+    @Test("digest auto-fades after Tunables.digestFadeDelay on the injected clock")
+    func digestAutoFadesAfterDelay() async throws {
+        // Arrange: a visible digest.
+        let sessionId = UUID()
+        let awayEvent = TimelineEvent(
+            at: Int.max / 2, class: "waiting", toolName: nil, label: "requested approval")
+        let harness = try Harness(eventsSource: { _ in [awayEvent] })
+        await harness.openAndAdopt(sessionId)
+        await harness.reconnectForDigest(sessionId)
+        #expect(harness.viewModel.digest != nil)
+
+        // Act: the fade timer parks on the fake clock; fire it.
+        await harness.clock.waitForSleepers(count: 1)
+        harness.clock.advance(by: Tunables.digestFadeDelay)
+        await harness.viewModel.waitUntilFadeCompleted(count: 1)
+
+        // Assert
+        #expect(harness.viewModel.digest == nil)
+    }
+
+    @Test("manual expand shows recent entries and cancels the fade — an expanded digest never vanishes under the reader")
+    func expandedDigestNeverFadesAndShowsRecent() async throws {
+        // Arrange: a visible digest with its fade timer parked.
+        let sessionId = UUID()
+        let awayEvent = TimelineEvent(
+            at: Int.max / 2, class: "tool", toolName: "Edit", label: "edited 3 files")
+        let harness = try Harness(eventsSource: { _ in [awayEvent] })
+        await harness.openAndAdopt(sessionId)
+        await harness.reconnectForDigest(sessionId)
+        await harness.clock.waitForSleepers(count: 1)
+
+        // Act: the user expands the summary row.
+        harness.viewModel.expandDigest()
+
+        // Assert: expanded, recent entries available, fade timer CANCELLED.
+        #expect(harness.viewModel.isDigestExpanded)
+        #expect(harness.viewModel.digest?.recent == [awayEvent])
+        #expect(harness.clock.pendingSleeperCount == 0)
+
+        // Act: even way past the fade delay the digest stays.
+        harness.clock.advance(by: Tunables.digestFadeDelay * 10)
+        #expect(harness.viewModel.digest != nil)
+
+        // Act: explicit dismiss clears everything.
+        harness.viewModel.dismissDigest()
+        #expect(harness.viewModel.digest == nil)
+        #expect(!harness.viewModel.isDigestExpanded)
+    }
+
+    // MARK: - Component copy (mirror of public/tabs.ts:326-350)
+
+    @Test("banner/sheet copy and choice labels mirror the web client exactly")
+    func componentCopyMirrorsWebClient() {
+        // Tool banner: "Claude wants to use ${pendingTool ?? 'a tool'}".
+        let toolGate = GateState(kind: .tool, detail: "Bash", epoch: 1)
+        #expect(GateBanner.message(for: toolGate) == "Claude wants to use Bash")
+        #expect(GateBanner.message(for: GateState(kind: .tool, detail: nil, epoch: 1))
+            == "Claude wants to use a tool")
+        #expect(GateChoiceSpec.specs(for: toolGate).map(\.label)
+            == ["✓ Approve", "✗ Reject"])
+        #expect(GateChoiceSpec.specs(for: toolGate).map(\.affordance)
+            == [.approve, .reject])
+
+        // Plan sheet: three-way, exact labels and title.
+        let planGate = GateState(kind: .plan, detail: nil, epoch: 2)
+        #expect(GateChoiceSpec.specs(for: planGate).map(\.label)
+            == ["✓ Approve + Auto", "✓ Approve + Review", "✎ Keep Planning"])
+        #expect(GateChoiceSpec.specs(for: planGate).map(\.affordance)
+            == [.approveAuto, .approveReview, .keepPlanning])
+        #expect(PlanGateSheet.title == "Claude finished planning — how should it proceed?")
+    }
+
+    @Test("digest summary composes non-zero parts only; user-only activity falls back to a count")
+    func digestSummaryComposition() {
+        // Arrange / Act / Assert: all four signal parts.
+        let full = AwayDigest(
+            toolRuns: 3, waitingCount: 1, sawDone: true, sawStuck: false, recent: [])
+        #expect(AwayDigestView.summary(for: full)
+            == "离开期间：工具调用 3 次 · 等待审批 1 次 · 已完成")
+
+        // Stuck-only digest.
+        let stuck = AwayDigest(
+            toolRuns: 0, waitingCount: 0, sawDone: false, sawStuck: true, recent: [])
+        #expect(AwayDigestView.summary(for: stuck) == "离开期间：曾卡住")
+
+        // Non-empty digest whose counted signals are all zero (e.g. only
+        // `user` events) still gets a rendered fallback line.
+        let userOnly = AwayDigest(
+            toolRuns: 0, waitingCount: 0, sawDone: false, sawStuck: false,
+            recent: [TimelineEvent(at: 1, class: "user", toolName: nil, label: "typed a prompt")])
+        #expect(AwayDigestView.summary(for: userOnly) == "离开期间：活动 1 条")
+    }
+}

ios/App/WebTermTests/KeyBarTests.swift

@@ -0,0 +1,132 @@
+import SessionCore
+import Testing
+import UIKit
+@testable import WebTerm
+
+/// T-iOS-11 · KeyBar component + hardware key commands (plan §7).
+/// The bar's layout mirrors `public/keybar.ts` `KEYBAR_BUTTONS` (order, glyphs,
+/// captions, primary flag) and EVERY label→bytes lookup goes through
+/// `KeyByteMap` — no byte literal exists in the App layer.
+@MainActor
+@Suite("KeyBar")
+struct KeyBarTests {
+    @MainActor
+    private final class KeyRecorder {
+        private(set) var keys: [KeyByteMap.Key] = []
+        func record(_ key: KeyByteMap.Key) { keys = keys + [key] }
+    }
+
+    // MARK: - Layout data (mirror of KEYBAR_BUTTONS)
+
+    @Test("button order mirrors public/keybar.ts KEYBAR_BUTTONS exactly")
+    func layoutOrderMirrorsWebKeybarButtons() {
+        let expectedOrder: [KeyByteMap.Key] = [
+            .esc, .escEsc, .shiftTab, .arrowUp, .arrowDown, .enter, .ctrlC,
+            .ctrlR, .ctrlO, .ctrlL, .ctrlT, .ctrlB, .ctrlD, .tab,
+            .arrowLeft, .arrowRight, .slash,
+        ]
+        #expect(KeyBarLayout.buttons.map(\.key) == expectedOrder)
+    }
+
+    @Test("glyph labels mirror the web bar; Esc is the only primary button")
+    func labelsAndPrimaryFlagMirrorWeb() {
+        let expectedLabels = [
+            "Esc", "Esc²", "⇧Tab", "↑", "↓", "⏎", "^C", "^R", "^O", "^L",
+            "^T", "^B", "^D", "Tab", "←", "→", "/",
+        ]
+        #expect(KeyBarLayout.buttons.map(\.label) == expectedLabels)
+        #expect(KeyBarLayout.buttons.filter(\.isPrimary).map(\.key) == [.esc])
+    }
+
+    @Test("every button spec resolves to real bytes through KeyByteMap (single source of truth)")
+    func everySpecResolvesThroughKeyByteMap() {
+        for spec in KeyBarLayout.buttons {
+            #expect(!KeyByteMap.bytes(for: spec.key).isEmpty,
+                    "no bytes for \(spec.key.rawValue)")
+        }
+    }
+
+    // MARK: - KeyBarView (UIKit input accessory)
+
+    @Test("KeyBarView builds one button per spec with the web title as accessibility label")
+    func keyBarViewBuildsOneButtonPerSpec() {
+        // Arrange / Act
+        let bar = KeyBarView()
+
+        // Assert
+        #expect(bar.keyButtons.count == KeyBarLayout.buttons.count)
+        #expect(bar.keyButtons.map(\.accessibilityLabel)
+            == KeyBarLayout.buttons.map(\.title))
+    }
+
+    @Test("tapping button i fires onKey with layout key i (bytes resolved downstream via KeyByteMap)")
+    func tappingButtonsFiresOnKeyInLayoutOrder() {
+        // Arrange
+        let bar = KeyBarView()
+        let recorder = KeyRecorder()
+        bar.onKey = { recorder.record($0) }
+
+        // Act: tap every button once, in order.
+        for button in bar.keyButtons {
+            button.sendActions(for: .touchUpInside)
+        }
+
+        // Assert
+        #expect(recorder.keys == KeyBarLayout.buttons.map(\.key))
+    }
+
+    // MARK: - Hardware keyboard (UIKeyCommand, same KeyByteMap mapping)
+
+    @Test("hardware chords: Esc, Shift+Tab and the 7 Ctrl chords map through KeyByteMap")
+    func hardwareChordsCoverEscShiftTabAndCtrlChords() {
+        let expected: [(KeyByteMap.Key, String, UIKeyModifierFlags)] = [
+            (.esc, UIKeyCommand.inputEscape, []),
+            (.shiftTab, "\t", .shift),
+            (.ctrlC, "c", .control),
+            (.ctrlR, "r", .control),
+            (.ctrlO, "o", .control),
+            (.ctrlL, "l", .control),
+            (.ctrlT, "t", .control),
+            (.ctrlB, "b", .control),
+            (.ctrlD, "d", .control),
+        ]
+        #expect(HardwareKeyCommands.chords.count == expected.count)
+        for (key, input, modifiers) in expected {
+            let chord = HardwareKeyCommands.chords.first { $0.key == key }
+            #expect(chord?.input == input, "input mismatch for \(key.rawValue)")
+            #expect(chord?.modifiers == modifiers, "modifiers mismatch for \(key.rawValue)")
+            #expect(!KeyByteMap.bytes(for: key).isEmpty)
+        }
+    }
+
+    @Test("build() emits one prioritized UIKeyCommand per chord and key(matching:) round-trips")
+    func buildEmitsPrioritizedCommandsAndRoundTrips() {
+        // Arrange / Act
+        let commands = HardwareKeyCommands.build(
+            action: #selector(UIResponder.becomeFirstResponder) // any selector; not invoked
+        )
+
+        // Assert
+        #expect(commands.count == HardwareKeyCommands.chords.count)
+        for command in commands {
+            #expect(command.wantsPriorityOverSystemBehavior)
+            let key = HardwareKeyCommands.key(matching: command)
+            #expect(key != nil, "no chord matches \(String(describing: command.input))")
+        }
+        #expect(Set(commands.compactMap { HardwareKeyCommands.key(matching: $0) }).count
+            == HardwareKeyCommands.chords.count)
+    }
+
+    @Test("hardware mapping never hijacks plain typing keys or arrows (SwiftTerm owns them — DECCKM)")
+    func hardwareMappingExcludesPlainKeysAndArrows() {
+        // Arrows must stay SwiftTerm-native: a fixed \u{1B}[A override would
+        // break application-cursor-keys mode (vim/htop send \u{1B}OA there).
+        // Enter/Tab/"/" are ordinary typing; Esc·Esc is two Esc presses.
+        let excluded: Set<KeyByteMap.Key> = [
+            .arrowUp, .arrowDown, .arrowLeft, .arrowRight,
+            .enter, .tab, .slash, .escEsc,
+        ]
+        let chordKeys = Set(HardwareKeyCommands.chords.map(\.key))
+        #expect(chordKeys.isDisjoint(with: excluded))
+    }
+}

ios/App/WebTermTests/PairingViewModelTests.swift

@@ -0,0 +1,433 @@
+import APIClient
+import Foundation
+import HostRegistry
+import TestSupport
+import Testing
+import WireProtocol
+@testable import WebTerm
+
+/// T-iOS-12 · PairingViewModel (plan §7 / §5.4). Probe LOGIC is T-iOS-8's
+/// domain — these tests cover the state mapping around it:
+/// scan/manual input → confirm gate (ZERO network before the user says go) →
+/// probe → Host into the store + navigate signal, error taxonomy → copy +
+/// action, and the §5.4 warning tiers.
+///
+/// Determinism: the probe is injected as a closure; scripted results come from
+/// an actor-backed `ProbeScript` (also the non-invocation counter). The
+/// end-to-end test runs the REAL `runPairingProbe` over `FakeHTTPTransport` +
+/// `FakeTransport` — zero real network, zero real waits.
+@MainActor
+@Suite("PairingViewModel")
+struct PairingViewModelTests {
+    // MARK: - Probe script (scripted results + invocation recording)
+
+    private actor ProbeScript {
+        private(set) var calls: [HostEndpoint] = []
+        private var results: [Result<HostEndpoint, PairingError>]
+
+        /// Empty `results` = always succeed with the probed endpoint.
+        init(results: [Result<HostEndpoint, PairingError>] = []) {
+            self.results = results
+        }
+
+        func invoke(_ endpoint: HostEndpoint) -> Result<HostEndpoint, PairingError> {
+            calls = calls + [endpoint]
+            guard let next = results.first else { return .success(endpoint) }
+            results = Array(results.dropFirst())
+            return next
+        }
+    }
+
+    private func makeViewModel(
+        store: any HostStore = InMemoryHostStore(),
+        script: ProbeScript
+    ) -> PairingViewModel {
+        PairingViewModel(store: store, probe: { await script.invoke($0) })
+    }
+
+    private struct StoreFailure: Error {}
+
+    private actor ThrowingHostStore: HostStore {
+        func loadAll() async throws -> [HostRegistry.Host] { [] }
+        func upsert(_ host: HostRegistry.Host) async throws -> [HostRegistry.Host] {
+            throw StoreFailure()
+        }
+        func remove(id: UUID) async throws -> [HostRegistry.Host] { [] }
+    }
+
+    // MARK: - Scan → confirm gate → REAL two-step probe → store + navigate
+
+    @Test("scan shows the HostEndpoint-parsed address, no network until confirm; then probe → Host into store + navigate signal")
+    func scanConfirmGateThenRealProbePairsHost() async throws {
+        // Arrange: REAL runPairingProbe over fakes — the strongest proof that
+        // (a) nothing touches the wire before the user confirms and (b) the
+        // production closure wiring is exercised end to end.
+        let http = FakeHTTPTransport()
+        let ws = FakeTransport()
+        let store = InMemoryHostStore()
+        let viewModel = PairingViewModel(
+            store: store,
+            probe: { await runPairingProbe(endpoint: $0, http: http, ws: ws) }
+        )
+        let base = "http://192.168.1.5:3000"
+        let probeSessionId = "1b671a64-40d5-491e-99b0-da01ff1f3341"
+        // Script the full happy path UP FRONT — if the VM probed before
+        // confirm, recordedRequests would already be non-empty below.
+        await http.queueSuccess(
+            url: try #require(URL(string: "\(base)/live-sessions")),
+            body: Data("[]".utf8)
+        )
+        await ws.emit(frame: #"{"type":"attached","sessionId":"\#(probeSessionId)"}"#)
+        await http.queueSuccess(
+            method: "DELETE",
+            url: try #require(URL(string: "\(base)/live-sessions/\(probeSessionId)")),
+            status: 204
+        )
+
+        // Act: scan the web UI QR payload (public/qr.ts encodes location.origin).
+        viewModel.handleScannedCode(base)
+
+        // Assert: confirm state shows the single-point-derived address and the
+        // scanned host has seen ZERO network traffic (probe ① would GET, probe
+        // ② would spawn a PTY on the target — untrusted scan input, plan §5).
+        guard case .confirming(let pending) = viewModel.phase else {
+            Issue.record("expected .confirming, got \(viewModel.phase)")
+            return
+        }
+        #expect(pending.displayAddress == base)
+        #expect(pending.endpoint.originHeader == base)
+        #expect(pending.warning == .plaintextLAN)
+        #expect(await http.recordedRequests.isEmpty)
+        #expect(await ws.connectAttempts.isEmpty)
+        #expect(viewModel.pairedHost == nil)
+
+        // Act: name the host, then confirm — ONLY now may the probe run.
+        viewModel.hostName = "书房 Mac"
+        await viewModel.confirmConnect()
+
+        // Assert: paired + navigate signal; Host{id,name} constructed by the
+        // VM (§3.4 contract ruling) and upserted into the store.
+        guard case .paired(let host) = viewModel.phase else {
+            Issue.record("expected .paired, got \(viewModel.phase)")
+            return
+        }
+        #expect(host.name == "书房 Mac")
+        #expect(host.endpoint == pending.endpoint)
+        #expect(viewModel.pairedHost == host)
+        #expect(try await store.loadAll() == [host])
+
+        // Assert: exactly the two probe HTTP calls, in order, Origin stamped
+        // iff guarded (§3.4 铁律) — and one WS attach round-trip, closed.
+        let requests = await http.recordedRequests
+        #expect(requests.map(\.httpMethod) == ["GET", "DELETE"])
+        #expect(requests[0].value(forHTTPHeaderField: "Origin") == nil)
+        #expect(requests[1].value(forHTTPHeaderField: "Origin") == base)
+        #expect(await ws.connectAttempts.count == 1)
+        #expect(await ws.closeCallCount == 1)
+
+        // Assert: a stray scan cannot preempt a finished pairing.
+        viewModel.handleScannedCode("http://10.0.0.9:3000")
+        #expect(viewModel.phase == .paired(host))
+    }
+
+    // MARK: - Input boundary: scan payloads are untrusted external input
+
+    @Test("non-http(s) scan payloads are rejected with copy and zero probe calls", arguments: [
+        "ftp://192.168.1.5:3000",
+        "ws://192.168.1.5:3000",
+        "javascript:alert(1)",
+        "WIFI:S:mynet;T:WPA;P:hunter2;;",
+        "",
+    ])
+    func scanRejectsNonHTTPPayloads(payload: String) async throws {
+        // Arrange
+        let script = ProbeScript()
+        let viewModel = makeViewModel(script: script)
+
+        // Act
+        viewModel.handleScannedCode(payload)
+
+        // Assert: stays idle, inline rejection copy, probe never invoked.
+        #expect(viewModel.phase == .idle)
+        #expect(viewModel.inputRejection == PairingCopy.scanRejected)
+        #expect(await script.calls.isEmpty)
+    }
+
+    // MARK: - Manual entry (documented decision: reuses the confirm state)
+
+    @Test("manual entry reuses the confirm state; a bare host:port gets the http:// convenience prefix", arguments: [
+        ("http://192.168.1.5:3000", "http://192.168.1.5:3000"),
+        ("192.168.1.5:3000", "http://192.168.1.5:3000"),
+        ("https://mac.tail1234.ts.net", "https://mac.tail1234.ts.net"),
+    ])
+    func manualEntryEntersConfirmState(input: String, expectedOrigin: String) async throws {
+        // Arrange
+        let script = ProbeScript()
+        let viewModel = makeViewModel(script: script)
+
+        // Act
+        viewModel.submitManualURL(input)
+
+        // Assert: SAME confirm state as the scan path (uniform §5.4 warning
+        // surface — documented T-iOS-12 decision), still zero probe calls.
+        guard case .confirming(let pending) = viewModel.phase else {
+            Issue.record("expected .confirming for \(input), got \(viewModel.phase)")
+            return
+        }
+        #expect(pending.endpoint.originHeader == expectedOrigin)
+        #expect(await script.calls.isEmpty)
+    }
+
+    @Test("unparseable manual input is rejected with copy", arguments: [
+        "", "   ", "://nope", "http://",
+    ])
+    func manualEntryRejectsUnparseableInput(input: String) async throws {
+        // Arrange
+        let script = ProbeScript()
+        let viewModel = makeViewModel(script: script)
+
+        // Act
+        viewModel.submitManualURL(input)
+
+        // Assert
+        #expect(viewModel.phase == .idle)
+        #expect(viewModel.inputRejection == PairingCopy.manualRejected)
+        #expect(await script.calls.isEmpty)
+    }
+
+    // MARK: - §5.4 warning tiers (shown on the confirm page)
+
+    @Test("warning tiers follow the §5.4 table", arguments: [
+        // public host → strongest BLOCKING warning, http AND https alike
+        ("http://203.0.113.7:3000", PairingViewModel.SecurityWarning.publicHostBlocking),
+        ("https://example.com", PairingViewModel.SecurityWarning.publicHostBlocking),
+        // ws:// to RFC1918 / link-local / .local → non-blocking plaintext notice
+        ("http://192.168.1.5:3000", PairingViewModel.SecurityWarning.plaintextLAN),
+        ("http://10.1.2.3:3000", PairingViewModel.SecurityWarning.plaintextLAN),
+        ("http://172.20.10.2:3000", PairingViewModel.SecurityWarning.plaintextLAN),
+        ("http://169.254.10.2:3000", PairingViewModel.SecurityWarning.plaintextLAN),
+        ("http://mymac.local:3000", PairingViewModel.SecurityWarning.plaintextLAN),
+        // Tailscale (100.64/10 CGNAT or MagicDNS *.ts.net) → no plaintext
+        // warning (WireGuard already encrypts); positive badge instead
+        ("http://100.101.102.103:3000", PairingViewModel.SecurityWarning.tailscaleEncrypted),
+        ("http://mac.tail1234.ts.net:3000", PairingViewModel.SecurityWarning.tailscaleEncrypted),
+        // loopback → none; https to a private-class host → none
+        ("http://127.0.0.1:3000", PairingViewModel.SecurityWarning.none),
+        ("http://localhost:3000", PairingViewModel.SecurityWarning.none),
+        ("https://192.168.1.5:3000", PairingViewModel.SecurityWarning.none),
+        ("https://mac.tail1234.ts.net", PairingViewModel.SecurityWarning.none),
+    ])
+    func warningTiersFollowTable(url: String, expected: PairingViewModel.SecurityWarning) throws {
+        // Arrange
+        let baseURL = try #require(URL(string: url))
+        let endpoint = try #require(HostEndpoint(baseURL: baseURL))
+
+        // Act & Assert
+        #expect(PairingViewModel.warning(for: endpoint) == expected)
+    }
+
+    @Test("public-host blocking warning requires explicit acknowledgement before any probe")
+    func blockingWarningGatesTheProbe() async throws {
+        // Arrange
+        let script = ProbeScript()
+        let viewModel = makeViewModel(script: script)
+        viewModel.handleScannedCode("http://203.0.113.7:3000")
+        guard case .confirming(let pending) = viewModel.phase else {
+            Issue.record("expected .confirming, got \(viewModel.phase)")
+            return
+        }
+        #expect(pending.warning == .publicHostBlocking)
+
+        // Act: confirm WITHOUT acknowledging the risk.
+        await viewModel.confirmConnect()
+
+        // Assert: no probe, still confirming, the UI is told to demand the ack.
+        #expect(await script.calls.isEmpty)
+        #expect(viewModel.phase == .confirming(pending))
+        #expect(viewModel.needsPublicRiskAcknowledgement)
+
+        // Act: explicit acknowledgement, then confirm again.
+        viewModel.hasAcknowledgedPublicRisk = true
+        await viewModel.confirmConnect()
+
+        // Assert: probe ran exactly once and pairing completed.
+        #expect(await script.calls.count == 1)
+        guard case .paired = viewModel.phase else {
+            Issue.record("expected .paired, got \(viewModel.phase)")
+            return
+        }
+    }
+
+    // MARK: - PairingError taxonomy → inline copy + recovery action
+
+    @Test("every PairingError maps to actionable copy and the right recovery action", arguments: [
+        (PairingError.localNetworkDenied,
+         PairingViewModel.RecoveryAction.openLocalNetworkSettings,
+         ["本地网络", "设置"]),
+        (PairingError.hostUnreachable(underlying: "Connection refused"),
+         PairingViewModel.RecoveryAction.retry,
+         ["Connection refused"]),
+        (PairingError.httpOkButNotWebTerminal,
+         PairingViewModel.RecoveryAction.retry,
+         ["端口"]),
+        (PairingError.originRejected(hint: "在主机加 ALLOWED_ORIGINS=http://192.168.1.5:3000"),
+         PairingViewModel.RecoveryAction.retry,
+         ["ALLOWED_ORIGINS=http://192.168.1.5:3000"]),
+        (PairingError.atsBlocked(host: "198.18.0.1"),
+         PairingViewModel.RecoveryAction.retry,
+         ["ATS", "198.18.0.1", "tailscale serve", "例外"]),
+        (PairingError.tlsFailure,
+         PairingViewModel.RecoveryAction.retry,
+         ["TLS"]),
+        (PairingError.timeout,
+         PairingViewModel.RecoveryAction.retry,
+         ["超时"]),
+    ])
+    func pairingErrorMapsToCopyAndAction(
+        error: PairingError,
+        expectedAction: PairingViewModel.RecoveryAction,
+        requiredFragments: [String]
+    ) async throws {
+        // Arrange: private-class host so no blocking-warning gate interferes.
+        let script = ProbeScript(results: [.failure(error)])
+        let viewModel = makeViewModel(script: script)
+        viewModel.handleScannedCode("http://192.168.1.5:3000")
+
+        // Act
+        await viewModel.confirmConnect()
+
+        // Assert
+        guard case .failed(_, let failure) = viewModel.phase else {
+            Issue.record("expected .failed for \(error), got \(viewModel.phase)")
+            return
+        }
+        #expect(failure.action == expectedAction)
+        #expect(!failure.message.isEmpty)
+        for fragment in requiredFragments {
+            #expect(failure.message.contains(fragment),
+                    "copy for \(error) must contain \(fragment)")
+        }
+    }
+
+    @Test("originRejected surfaces the probe's hint VERBATIM as the whole message")
+    func originRejectedHintIsVerbatim() async throws {
+        // Arrange: the hint the probe derives from endpoint.originHeader is
+        // already the complete actionable copy — never rewrap or re-derive it.
+        let hint = "服务器拒绝了这个来源。请在主机上设置 ALLOWED_ORIGINS=http://192.168.1.5:3000"
+            + "（与 App 连接的 URL 完全一致）后重启 web-terminal，再重试配对。"
+        let script = ProbeScript(results: [.failure(.originRejected(hint: hint))])
+        let viewModel = makeViewModel(script: script)
+        viewModel.handleScannedCode("http://192.168.1.5:3000")
+
+        // Act
+        await viewModel.confirmConnect()
+
+        // Assert
+        guard case .failed(_, let failure) = viewModel.phase else {
+            Issue.record("expected .failed, got \(viewModel.phase)")
+            return
+        }
+        #expect(failure.message == hint)
+    }
+
+    // MARK: - Retry / cancel
+
+    @Test("retry re-runs the probe against the same endpoint and can succeed")
+    func retryRerunsProbeAfterFailure() async throws {
+        // Arrange: first probe times out, second succeeds.
+        let script = ProbeScript(results: [.failure(.timeout)])
+        let store = InMemoryHostStore()
+        let viewModel = makeViewModel(store: store, script: script)
+        viewModel.handleScannedCode("http://192.168.1.5:3000")
+        await viewModel.confirmConnect()
+        guard case .failed = viewModel.phase else {
+            Issue.record("expected .failed, got \(viewModel.phase)")
+            return
+        }
+
+        // Act
+        await viewModel.retry()
+
+        // Assert: two probe calls, same endpoint, pairing completed.
+        let calls = await script.calls
+        #expect(calls.count == 2)
+        #expect(calls.first == calls.last)
+        guard case .paired(let host) = viewModel.phase else {
+            Issue.record("expected .paired, got \(viewModel.phase)")
+            return
+        }
+        #expect(try await store.loadAll() == [host])
+    }
+
+    @Test("cancel returns to idle without ever probing")
+    func cancelReturnsToIdleWithoutProbe() async throws {
+        // Arrange
+        let script = ProbeScript()
+        let viewModel = makeViewModel(script: script)
+        viewModel.handleScannedCode("http://192.168.1.5:3000")
+
+        // Act
+        viewModel.cancel()
+
+        // Assert
+        #expect(viewModel.phase == .idle)
+        #expect(viewModel.inputRejection == nil)
+        #expect(await script.calls.isEmpty)
+    }
+
+    // MARK: - Store failure is explicit, never silent
+
+    @Test("a store failure after a successful probe surfaces an explicit retryable error")
+    func storeFailureSurfacesExplicitError() async throws {
+        // Arrange
+        let script = ProbeScript()
+        let viewModel = makeViewModel(store: ThrowingHostStore(), script: script)
+        viewModel.handleScannedCode("http://192.168.1.5:3000")
+
+        // Act
+        await viewModel.confirmConnect()
+
+        // Assert: failed with the dedicated copy; no navigate signal.
+        guard case .failed(_, let failure) = viewModel.phase else {
+            Issue.record("expected .failed, got \(viewModel.phase)")
+            return
+        }
+        #expect(failure.message == PairingCopy.storeFailed)
+        #expect(failure.action == .retry)
+        #expect(viewModel.pairedHost == nil)
+    }
+
+    // MARK: - Host naming
+
+    @Test("host name defaults to the endpoint host and user names are trimmed")
+    func hostNameDefaultsAndTrims() async throws {
+        // Arrange & Act: untouched name → default = endpoint host.
+        let script = ProbeScript()
+        let storeA = InMemoryHostStore()
+        let viewModelA = makeViewModel(store: storeA, script: script)
+        viewModelA.handleScannedCode("http://192.168.1.5:3000")
+        #expect(viewModelA.hostName == "192.168.1.5")
+        await viewModelA.confirmConnect()
+
+        // Assert
+        guard case .paired(let defaultNamed) = viewModelA.phase else {
+            Issue.record("expected .paired, got \(viewModelA.phase)")
+            return
+        }
+        #expect(defaultNamed.name == "192.168.1.5")
+
+        // Arrange & Act: user-typed name is trimmed before storing.
+        let storeB = InMemoryHostStore()
+        let viewModelB = makeViewModel(store: storeB, script: script)
+        viewModelB.handleScannedCode("http://192.168.1.5:3000")
+        viewModelB.hostName = "  书房 Mac  "
+        await viewModelB.confirmConnect()
+
+        // Assert
+        guard case .paired(let userNamed) = viewModelB.phase else {
+            Issue.record("expected .paired, got \(viewModelB.phase)")
+            return
+        }
+        #expect(userNamed.name == "书房 Mac")
+    }
+}

ios/App/WebTermTests/SessionListViewModelTests.swift

@@ -0,0 +1,581 @@
+import APIClient
+import Foundation
+import HostRegistry
+import TestSupport
+import Testing
+import WireProtocol
+@testable import WebTerm
+
+/// T-iOS-13 · SessionListViewModel (merged chooser + dashboard, plan §7).
+///
+/// Covers the task RED list end to end, deterministically (zero real waits):
+/// - poll cadence on `FakeClock` (`waitForSleepers` barrier + cancellation
+///   leak-check on leave),
+/// - status dot mapping for all 5 states + the `pending:true` ⚠ badge priority
+///   (overlay — `/live-sessions` carries NO pending field, src/types.ts:246-256),
+/// - telemetry staleness at the exact `Tunables.telemetryStaleTtlMs` boundary
+///   via an injected now-provider,
+/// - swipe-to-kill: optimistic removal proven BEFORE the server replies (gated
+///   transport), Origin stamped on the DELETE, rollback on failure,
+/// - server order kept with `exited:true` grouped at the bottom,
+/// - "+ New session" navigation signal carrying `sessionId: nil`.
+///
+/// All HTTP goes through the REAL `APIClient` over `FakeHTTPTransport`
+/// (task brief: LiveSessionInfo decode exists — exercise it, don't stub rows).
+@MainActor
+@Suite("SessionListViewModel")
+struct SessionListViewModelTests {
+    private nonisolated static let base = "http://192.168.1.5:3000"
+    /// Fixed "now" injected into the VM — staleness must be deterministic.
+    private nonisolated static let nowMs = 1_700_000_100_000
+
+    // MARK: - Fixtures
+
+    private func makeHost(
+        _ urlString: String = SessionListViewModelTests.base,
+        name: String = "书房 Mac"
+    ) throws -> HostRegistry.Host {
+        let url = try #require(URL(string: urlString))
+        let endpoint = try #require(HostEndpoint(baseURL: url))
+        return HostRegistry.Host(id: UUID(), name: name, endpoint: endpoint)
+    }
+
+    private func listURL(_ base: String = SessionListViewModelTests.base) throws -> URL {
+        try #require(URL(string: "\(base)/live-sessions"))
+    }
+
+    private func deleteURL(
+        id: UUID, base: String = SessionListViewModelTests.base
+    ) throws -> URL {
+        try #require(URL(string: "\(base)/live-sessions/\(id.uuidString.lowercased())"))
+    }
+
+    /// One `/live-sessions` entry in the server's exact JSON shape.
+    private func sessionJSON(
+        id: UUID,
+        createdAt: Int = 1_700_000_000_000,
+        clientCount: Int = 1,
+        status: String = "working",
+        exited: Bool = false,
+        cwd: String? = "/Users/dev/proj",
+        cols: Int = 80,
+        rows: Int = 24,
+        telemetry: String? = nil
+    ) -> String {
+        let cwdJSON = cwd.map { "\"\($0)\"" } ?? "null"
+        let telemetryJSON = telemetry.map { ",\"telemetry\":\($0)" } ?? ""
+        return "{\"id\":\"\(id.uuidString.lowercased())\",\"createdAt\":\(createdAt)"
+            + ",\"clientCount\":\(clientCount),\"status\":\"\(status)\",\"exited\":\(exited)"
+            + ",\"cwd\":\(cwdJSON),\"cols\":\(cols),\"rows\":\(rows)\(telemetryJSON)}"
+    }
+
+    private func listBody(_ entries: [String]) -> Data {
+        Data("[\(entries.joined(separator: ","))]".utf8)
+    }
+
+    private func makeViewModel(
+        hosts: [HostRegistry.Host],
+        http: any HTTPTransport,
+        clock: any Clock<Duration> = FakeClock(),
+        nowMs: @escaping @Sendable () -> Int = { SessionListViewModelTests.nowMs }
+    ) -> SessionListViewModel {
+        SessionListViewModel(
+            hostStore: InMemoryHostStore(hosts: hosts),
+            http: http,
+            clock: clock,
+            nowMs: nowMs
+        )
+    }
+
+    /// Loads hosts + performs one manual fetch — the no-polling arrangement
+    /// used by every test that does not exercise the poll loop itself.
+    private func loadOnce(_ viewModel: SessionListViewModel) async {
+        await viewModel.reloadHosts()
+        await viewModel.refresh()
+    }
+
+    private struct StoreFailure: Error {}
+
+    private actor ThrowingHostStore: HostStore {
+        func loadAll() async throws -> [HostRegistry.Host] { throw StoreFailure() }
+        func upsert(_ host: HostRegistry.Host) async throws -> [HostRegistry.Host] { [] }
+        func remove(id: UUID) async throws -> [HostRegistry.Host] { [] }
+    }
+
+    /// HTTPTransport wrapper that parks requests of one method until the test
+    /// opens the gate — the deterministic way to observe the OPTIMISTIC state
+    /// while the DELETE is still in flight.
+    private actor GatedHTTPTransport: HTTPTransport {
+        private let inner: FakeHTTPTransport
+        private let gatedMethod: String
+        private var isOpen = false
+        private var gatedArrivalCount = 0
+        private var gateOpeners: [CheckedContinuation<Void, Never>] = []
+        private var arrivalWaiters: [CheckedContinuation<Void, Never>] = []
+
+        init(inner: FakeHTTPTransport, gatedMethod: String) {
+            self.inner = inner
+            self.gatedMethod = gatedMethod.uppercased()
+        }
+
+        func send(_ request: URLRequest) async throws -> (Data, HTTPURLResponse) {
+            if (request.httpMethod ?? "GET").uppercased() == gatedMethod {
+                gatedArrivalCount += 1
+                for waiter in arrivalWaiters { waiter.resume() }
+                arrivalWaiters = []
+                if !isOpen {
+                    await withCheckedContinuation { gateOpeners.append($0) }
+                }
+            }
+            return try await inner.send(request)
+        }
+
+        /// Suspends until at least one gated request has arrived (and parked).
+        func waitForGatedArrival() async {
+            guard gatedArrivalCount == 0 else { return }
+            await withCheckedContinuation { arrivalWaiters.append($0) }
+        }
+
+        func openGate() {
+            isOpen = true
+            for opener in gateOpeners { opener.resume() }
+            gateOpeners = []
+        }
+    }
+
+    // MARK: - Poll cadence + leave stops cleanly (task RED item 1)
+
+    @Test("visible: polls /live-sessions every listPollInterval; leaving cancels the parked sleeper — no leaked task, zero further traffic")
+    func pollingCadenceAndLeaveStopsCleanly() async throws {
+        // Arrange: 3 queued list responses — one per expected poll tick.
+        let clock = FakeClock()
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let url = try listURL()
+        let sessionId = UUID()
+        for _ in 0..<3 {
+            await http.queueSuccess(url: url, body: listBody([sessionJSON(id: sessionId)]))
+        }
+        let viewModel = makeViewModel(hosts: [host], http: http, clock: clock)
+
+        // Act: appear (twice — idempotence: no second poll loop may spawn).
+        viewModel.appeared()
+        viewModel.appeared()
+        await viewModel.waitUntilFetches(count: 1)
+
+        // Assert: first fetch landed and rows are decoded LiveSessionInfo.
+        #expect(viewModel.rows.map(\.id) == [sessionId])
+        #expect(viewModel.emptyState == nil)
+
+        // Act + Assert: each interval elapsing triggers exactly one more fetch.
+        await clock.waitForSleepers(count: 1)
+        clock.advance(by: Tunables.listPollInterval)
+        await viewModel.waitUntilFetches(count: 2)
+
+        await clock.waitForSleepers(count: 1)
+        clock.advance(by: Tunables.listPollInterval)
+        await viewModel.waitUntilFetches(count: 3)
+
+        // Act: leave the screen while the poll task is parked in sleep.
+        await clock.waitForSleepers(count: 1)
+        viewModel.disappeared()
+
+        // Assert: cancellation reclaimed the sleeper synchronously (no leaked
+        // timer) and a long stretch of fake time produces zero new requests.
+        #expect(clock.pendingSleeperCount == 0)
+        clock.advance(by: Tunables.listPollInterval * 10)
+        let requestCount = await http.recordedRequests.count
+        #expect(requestCount == 3)
+    }
+
+    // MARK: - Empty states
+
+    @Test("no paired hosts → .notPaired empty state and ZERO network traffic")
+    func notPairedEmptyStateWithoutTraffic() async throws {
+        // Arrange
+        let http = FakeHTTPTransport()
+        let viewModel = makeViewModel(hosts: [], http: http)
+
+        // Act
+        viewModel.appeared()
+        await viewModel.waitUntilFetches(count: 1)
+
+        // Assert
+        #expect(viewModel.emptyState == .notPaired)
+        #expect(await http.recordedRequests.isEmpty)
+        viewModel.disappeared()
+    }
+
+    @Test("empty list from the host → .noSessions; a later non-empty fetch clears it")
+    func noSessionsEmptyStateThenPopulated() async throws {
+        // Arrange
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let url = try listURL()
+        await http.queueSuccess(url: url, body: listBody([]))
+        let viewModel = makeViewModel(hosts: [host], http: http)
+
+        // Act & Assert: loaded + empty → .noSessions (distinct from not-paired).
+        await loadOnce(viewModel)
+        #expect(viewModel.emptyState == .noSessions)
+
+        // Act & Assert: pull-to-refresh path fetches on demand and clears it.
+        await http.queueSuccess(url: url, body: listBody([sessionJSON(id: UUID())]))
+        await viewModel.refresh()
+        #expect(viewModel.rows.count == 1)
+        #expect(viewModel.emptyState == nil)
+    }
+
+    @Test("host store failure surfaces explicit copy — never a silent empty list")
+    func hostStoreFailureIsExplicit() async throws {
+        // Arrange
+        let viewModel = SessionListViewModel(
+            hostStore: ThrowingHostStore(),
+            http: FakeHTTPTransport(),
+            clock: FakeClock(),
+            nowMs: { Self.nowMs }
+        )
+
+        // Act
+        await viewModel.reloadHosts()
+
+        // Assert
+        #expect(viewModel.hosts.isEmpty)
+        #expect(viewModel.hostsErrorMessage == SessionListCopy.hostsLoadFailed)
+    }
+
+    // MARK: - Status dots (5 states) + pending ⚠ badge priority
+
+    @Test("status dot maps every ClaudeStatus state from the wire", arguments: [
+        ("working", ClaudeStatus.working),
+        ("waiting", ClaudeStatus.waiting),
+        ("idle", ClaudeStatus.idle),
+        ("unknown", ClaudeStatus.unknown),
+        ("stuck", ClaudeStatus.stuck),
+    ])
+    func statusDotMapsFiveStates(raw: String, expected: ClaudeStatus) async throws {
+        // Arrange
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let sessionId = UUID()
+        await http.queueSuccess(
+            url: try listURL(), body: listBody([sessionJSON(id: sessionId, status: raw)])
+        )
+        let viewModel = makeViewModel(hosts: [host], http: http)
+
+        // Act
+        await loadOnce(viewModel)
+
+        // Assert
+        #expect(viewModel.rows.first?.indicator == .status(expected))
+    }
+
+    @Test("pending overlay wins over the status dot with a ⚠ badge, and clears back")
+    func pendingBadgeTakesPriority() async throws {
+        // Arrange: a WORKING session — the strongest contrast to the badge.
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let sessionId = UUID()
+        await http.queueSuccess(
+            url: try listURL(),
+            body: listBody([sessionJSON(id: sessionId, status: "working")])
+        )
+        let viewModel = makeViewModel(hosts: [host], http: http)
+        await loadOnce(viewModel)
+        #expect(viewModel.rows.first?.indicator == .status(.working))
+
+        // Act: gate arrives (status frame pending:true → T-iOS-15 wiring calls this).
+        viewModel.setPendingApproval(sessionId: sessionId, pending: true)
+
+        // Assert: badge PRIORITY — status stays working underneath.
+        #expect(viewModel.rows.first?.indicator == .pendingApproval)
+        #expect(viewModel.rows.first?.info.status == .working)
+
+        // Act & Assert: gate resolved → dot returns.
+        viewModel.setPendingApproval(sessionId: sessionId, pending: false)
+        #expect(viewModel.rows.first?.indicator == .status(.working))
+    }
+
+    @Test("indicator glyphs mirror public/tabs.ts claudeIcon, ⚠ for pending")
+    func indicatorGlyphsMirrorWeb() {
+        #expect(SessionListViewModel.StatusIndicator.status(.working).glyph == "⚙")
+        #expect(SessionListViewModel.StatusIndicator.status(.waiting).glyph == "⏳")
+        #expect(SessionListViewModel.StatusIndicator.status(.idle).glyph == "✓")
+        #expect(SessionListViewModel.StatusIndicator.status(.stuck).glyph == "⚠")
+        #expect(SessionListViewModel.StatusIndicator.status(.unknown).glyph == "")
+        #expect(SessionListViewModel.StatusIndicator.pendingApproval.glyph == "⚠")
+    }
+
+    // MARK: - Telemetry staleness (injected now-provider, exact boundary)
+
+    @Test("telemetry chips grey strictly past telemetryStaleTtlMs; at the boundary they stay live; no telemetry → no chips")
+    func telemetryStalenessBoundary() async throws {
+        // Arrange: `at` exactly TTL old (NOT stale — web rule is strict `>`,
+        // public/preview-grid.ts), one 1 ms older (stale), one without telemetry.
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let boundaryId = UUID()
+        let staleId = UUID()
+        let bareId = UUID()
+        let boundaryAt = Self.nowMs - Tunables.telemetryStaleTtlMs
+        let staleAt = Self.nowMs - Tunables.telemetryStaleTtlMs - 1
+        await http.queueSuccess(url: try listURL(), body: listBody([
+            sessionJSON(id: boundaryId, telemetry: "{\"at\":\(boundaryAt),\"costUsd\":0.5}"),
+            sessionJSON(id: staleId, telemetry: "{\"at\":\(staleAt),\"costUsd\":0.5}"),
+            sessionJSON(id: bareId),
+        ]))
+        let viewModel = makeViewModel(hosts: [host], http: http)
+
+        // Act
+        await loadOnce(viewModel)
+
+        // Assert
+        let rowsById = Dictionary(uniqueKeysWithValues: viewModel.rows.map { ($0.id, $0) })
+        #expect(rowsById[boundaryId]?.telemetry?.isStale == false)
+        #expect(rowsById[staleId]?.telemetry?.isStale == true)
+        #expect(rowsById[bareId]?.telemetry == nil)
+    }
+
+    @Test("chip model mirrors the web gauge: $ cost to 4 places, ctx warn > 80, PR link https-only")
+    func telemetryChipModelContent() throws {
+        // Arrange: http:// PR URL — the SEC-L5 mirror must refuse to link it.
+        let telemetry = StatusTelemetry(
+            contextUsedPct: 91.4,
+            costUsd: 0.1234,
+            model: "opus",
+            pr: PrInfo(number: 7, url: "http://github.com/x/pull/7", reviewState: "approved"),
+            at: Self.nowMs
+        )
+
+        // Act
+        let model = try #require(TelemetryChips.Model(telemetry: telemetry, nowMs: Self.nowMs))
+
+        // Assert
+        #expect(model.costText == "$0.1234")
+        #expect(model.contextText == "ctx 91%")
+        #expect(model.isContextWarning)
+        #expect(model.modelName == "opus")
+        #expect(model.prText == "PR #7")
+        #expect(model.prReviewState == "approved")
+        #expect(model.prURL == nil) // http never becomes a tappable link
+        #expect(!model.isStale)
+
+        // Act & Assert: https URL IS linkable; low ctx carries no warning.
+        let httpsTelemetry = StatusTelemetry(
+            contextUsedPct: 40,
+            pr: PrInfo(number: 7, url: "https://github.com/x/pull/7"),
+            at: Self.nowMs
+        )
+        let httpsModel = try #require(
+            TelemetryChips.Model(telemetry: httpsTelemetry, nowMs: Self.nowMs)
+        )
+        #expect(httpsModel.prURL != nil)
+        #expect(!httpsModel.isContextWarning)
+        #expect(TelemetryChips.Model(telemetry: nil, nowMs: Self.nowMs) == nil)
+    }
+
+    // MARK: - Ordering: server order kept, exited grouped at the bottom
+
+    @Test("rows keep the server's order with exited sessions grouped last, order preserved inside each group")
+    func orderingGroupsExitedAtBottom() async throws {
+        // Arrange: server (newest-first) order interleaves exited sessions.
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let liveA = UUID()
+        let exitedB = UUID()
+        let liveC = UUID()
+        let exitedD = UUID()
+        await http.queueSuccess(url: try listURL(), body: listBody([
+            sessionJSON(id: liveA),
+            sessionJSON(id: exitedB, exited: true),
+            sessionJSON(id: liveC),
+            sessionJSON(id: exitedD, exited: true),
+        ]))
+        let viewModel = makeViewModel(hosts: [host], http: http)
+
+        // Act
+        await loadOnce(viewModel)
+
+        // Assert
+        #expect(viewModel.rows.map(\.id) == [liveA, liveC, exitedB, exitedD])
+    }
+
+    // MARK: - Swipe-to-kill: optimistic + Origin + rollback
+
+    @Test("kill removes the row optimistically BEFORE the server replies, stamps Origin on the DELETE, stays removed on 204")
+    func killOptimisticRemovalThenConfirmed() async throws {
+        // Arrange: DELETE parks at a gate so the in-flight state is observable.
+        let inner = FakeHTTPTransport()
+        let gated = GatedHTTPTransport(inner: inner, gatedMethod: "DELETE")
+        let host = try makeHost()
+        let targetId = UUID()
+        let otherId = UUID()
+        await inner.queueSuccess(
+            url: try listURL(),
+            body: listBody([sessionJSON(id: targetId), sessionJSON(id: otherId)])
+        )
+        await inner.queueSuccess(method: "DELETE", url: try deleteURL(id: targetId), status: 204)
+        let viewModel = makeViewModel(hosts: [host], http: gated)
+        await loadOnce(viewModel)
+        #expect(viewModel.rows.map(\.id) == [targetId, otherId])
+
+        // Act: swipe-to-kill; hold the DELETE at the gate.
+        let killTask = Task { await viewModel.kill(sessionId: targetId) }
+        await gated.waitForGatedArrival()
+
+        // Assert: the row is ALREADY gone while the server has not answered.
+        #expect(viewModel.rows.map(\.id) == [otherId])
+        #expect(viewModel.killErrorMessage == nil)
+
+        // Act: let the 204 through.
+        await gated.openGate()
+        await killTask.value
+
+        // Assert: still removed; the DELETE carried the exact Origin (G 铁律).
+        #expect(viewModel.rows.map(\.id) == [otherId])
+        let deleteRequest = await inner.recordedRequests.first { $0.httpMethod == "DELETE" }
+        #expect(deleteRequest?.url == (try deleteURL(id: targetId)))
+        #expect(deleteRequest?.value(forHTTPHeaderField: "Origin") == Self.base)
+    }
+
+    @Test("kill failure rolls the row back at its original position with explicit copy")
+    func killFailureRollsBack() async throws {
+        // Arrange: the Origin guard rejects the DELETE (403).
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let targetId = UUID()
+        let otherId = UUID()
+        await http.queueSuccess(
+            url: try listURL(),
+            body: listBody([sessionJSON(id: targetId), sessionJSON(id: otherId)])
+        )
+        await http.queueSuccess(method: "DELETE", url: try deleteURL(id: targetId), status: 403)
+        let viewModel = makeViewModel(hosts: [host], http: http)
+        await loadOnce(viewModel)
+
+        // Act
+        await viewModel.kill(sessionId: targetId)
+
+        // Assert: rollback restored the ORIGINAL position, copy is actionable.
+        #expect(viewModel.rows.map(\.id) == [targetId, otherId])
+        #expect(viewModel.killErrorMessage
+            == SessionListCopy.killFailed(APIClientError.forbidden.message))
+    }
+
+    @Test("kill on an already-gone session (404) keeps it removed without an error")
+    func killAlreadyGoneStaysRemoved() async throws {
+        // Arrange
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let targetId = UUID()
+        await http.queueSuccess(url: try listURL(), body: listBody([sessionJSON(id: targetId)]))
+        await http.queueSuccess(method: "DELETE", url: try deleteURL(id: targetId), status: 404)
+        let viewModel = makeViewModel(hosts: [host], http: http)
+        await loadOnce(viewModel)
+
+        // Act
+        await viewModel.kill(sessionId: targetId)
+
+        // Assert: 404 = session already dead — the optimistic removal was right.
+        #expect(viewModel.rows.isEmpty)
+        #expect(viewModel.killErrorMessage == nil)
+    }
+
+    // MARK: - Navigation signals
+
+    @Test("+ New session emits an OpenRequest with sessionId nil; row taps carry the id; repeats re-fire")
+    func navigationSignals() async throws {
+        // Arrange
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let sessionId = UUID()
+        await http.queueSuccess(url: try listURL(), body: listBody([sessionJSON(id: sessionId)]))
+        let viewModel = makeViewModel(hosts: [host], http: http)
+        await loadOnce(viewModel)
+        #expect(viewModel.openRequest == nil)
+
+        // Act & Assert: "+ New session" → sessionId nil (attach(null) downstream).
+        viewModel.requestNewSession()
+        let newRequest = try #require(viewModel.openRequest)
+        #expect(newRequest.sessionId == nil)
+        #expect(newRequest.host == host)
+
+        // Act & Assert: opening a listed session carries its id.
+        viewModel.openSession(id: sessionId)
+        let openRequest = try #require(viewModel.openRequest)
+        #expect(openRequest.sessionId == sessionId)
+        #expect(openRequest.host == host)
+
+        // Act & Assert: the SAME tap again is a fresh signal (unique id).
+        viewModel.openSession(id: sessionId)
+        let repeated = try #require(viewModel.openRequest)
+        #expect(repeated.sessionId == sessionId)
+        #expect(repeated.id != openRequest.id)
+
+        // Act & Assert: unknown ids are refused at the boundary.
+        viewModel.openSession(id: UUID())
+        #expect(viewModel.openRequest?.id == repeated.id)
+    }
+
+    // MARK: - Host switching (multi-host header hook)
+
+    @Test("switching hosts refetches from the new endpoint and resets the list")
+    func hostSwitchRefetches() async throws {
+        // Arrange: two paired hosts with distinct session lists.
+        let baseB = "http://10.0.0.7:3000"
+        let hostA = try makeHost()
+        let hostB = try makeHost(baseB, name: "工作室 Mac")
+        let http = FakeHTTPTransport()
+        let sessionA = UUID()
+        let sessionB = UUID()
+        await http.queueSuccess(url: try listURL(), body: listBody([sessionJSON(id: sessionA)]))
+        await http.queueSuccess(
+            url: try listURL(baseB), body: listBody([sessionJSON(id: sessionB)])
+        )
+        let viewModel = makeViewModel(hosts: [hostA, hostB], http: http)
+        await loadOnce(viewModel)
+        #expect(viewModel.activeHost == hostA)
+        #expect(viewModel.rows.map(\.id) == [sessionA])
+
+        // Act
+        await viewModel.selectHost(id: hostB.id)
+
+        // Assert: list now comes from host B; navigation carries host B.
+        #expect(viewModel.activeHost == hostB)
+        #expect(viewModel.rows.map(\.id) == [sessionB])
+        viewModel.requestNewSession()
+        #expect(viewModel.openRequest?.host == hostB)
+        let lastURL = await http.recordedRequests.last?.url
+        #expect(lastURL == (try listURL(baseB)))
+    }
+
+    // MARK: - Fetch failure keeps the stale list (explicit error, no wipe)
+
+    @Test("a failed poll keeps the last good rows and surfaces copy; the next success clears it")
+    func fetchFailureKeepsStaleRows() async throws {
+        // Arrange
+        let http = FakeHTTPTransport()
+        let host = try makeHost()
+        let url = try listURL()
+        let sessionId = UUID()
+        await http.queueSuccess(url: url, body: listBody([sessionJSON(id: sessionId)]))
+        await http.queueSuccess(url: url, status: 500)
+        await http.queueSuccess(url: url, body: listBody([sessionJSON(id: sessionId)]))
+        let viewModel = makeViewModel(hosts: [host], http: http)
+        await loadOnce(viewModel)
+        #expect(viewModel.rows.map(\.id) == [sessionId])
+
+        // Act: the 500 poll.
+        await viewModel.refresh()
+
+        // Assert: stale rows survive, error copy is explicit (includes status).
+        #expect(viewModel.rows.map(\.id) == [sessionId])
+        let message = try #require(viewModel.fetchErrorMessage)
+        #expect(message.contains("500"))
+        #expect(viewModel.emptyState == nil)
+
+        // Act & Assert: recovery clears the error.
+        await viewModel.refresh()
+        #expect(viewModel.fetchErrorMessage == nil)
+    }
+}

ios/App/WebTermTests/TerminalViewModelTests.swift

@@ -0,0 +1,280 @@
+import Foundation
+import SessionCore
+import TestSupport
+import Testing
+import WireProtocol
+@testable import WebTerm
+
+/// T-iOS-11 · TerminalViewModel (plan §7). All tests run against a REAL
+/// `SessionEngine` over `TestSupport.FakeTransport` + `FakeClock` (the task's
+/// documented testability choice): the VM consumes `engine.events` exactly as
+/// production will, with zero real waits and zero network.
+///
+/// Determinism: the VM's internal `waitUntilProcessed(eventCount:)` /
+/// `waitUntilForwarded(sendCount:)` barriers and the `onEventApplied` tap are
+/// the "event reached the VM" signals — never polling, never sleeping.
+@MainActor
+@Suite("TerminalViewModel")
+struct TerminalViewModelTests {
+    // MARK: - Server-side frame fixtures (untrusted wire input, hand-built JSON)
+
+    private enum ServerFrames {
+        static func attached(_ id: UUID) -> String {
+            #"{"type":"attached","sessionId":"\#(id.uuidString.lowercased())"}"#
+        }
+
+        static func output(_ data: String) -> String {
+            #"{"type":"output","data":"\#(data)"}"#
+        }
+
+        static func exit(code: Int, reason: String) -> String {
+            #"{"type":"exit","code":\#(code),"reason":"\#(reason)"}"#
+        }
+    }
+
+    private struct TestStreamError: Error {}
+
+    // MARK: - Harness
+
+    /// Engine over fakes + the VM under test, wired exactly like production
+    /// (T-iOS-15 passes `engine.events`; a fan-out branch arrives only when
+    /// GateViewModel shares the stream).
+    @MainActor
+    private final class Harness {
+        let transport = FakeTransport()
+        let clock = FakeClock()
+        let engine: SessionEngine
+        let viewModel: TerminalViewModel
+
+        init() throws {
+            let baseURL = try #require(URL(string: "http://192.168.1.5:3000"))
+            let endpoint = try #require(HostEndpoint(baseURL: baseURL))
+            engine = SessionEngine(
+                transport: transport, clock: clock, endpoint: endpoint,
+                eventsSource: { _ in [] }
+            )
+            viewModel = TerminalViewModel(engine: engine, events: engine.events)
+            viewModel.start()
+        }
+
+        /// Standard preamble: open → .connecting → .connected → server confirms
+        /// the attach. 3 events reach the VM.
+        func openAndAdopt(_ id: UUID) async {
+            await engine.open(sessionId: nil, cwd: nil)
+            await transport.emit(frame: ServerFrames.attached(id))
+            await viewModel.waitUntilProcessed(eventCount: 3)
+        }
+    }
+
+    /// Records `(banner, phase)` after every applied event — the deterministic
+    /// way to observe transient states (`.connecting` is often already
+    /// superseded by the time a barrier-based await resumes).
+    @MainActor
+    private final class StateRecorder {
+        private(set) var banners: [TerminalViewModel.ConnectionBanner] = []
+
+        func attach(to viewModel: TerminalViewModel) {
+            viewModel.onEventApplied = { [weak self, weak viewModel] _ in
+                guard let self, let viewModel else { return }
+                self.banners = self.banners + [viewModel.banner]
+            }
+        }
+    }
+
+    // MARK: - Output forwarding (feed order, MainActor by construction)
+
+    @Test("output forwards to the terminal sink in arrival order; a late sink flushes the buffer first")
+    func outputForwardsInOrderAndLateSinkFlushesBuffer() async throws {
+        // Arrange
+        let harness = try Harness()
+        let sessionId = UUID()
+        await harness.openAndAdopt(sessionId)
+
+        // Act: two chunks arrive BEFORE any sink exists (screen not built yet).
+        await harness.transport.emit(frame: ServerFrames.output("one"))
+        await harness.transport.emit(frame: ServerFrames.output("two"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 5)
+
+        // The sink attaches late (SwiftTerm view just got created): buffered
+        // chunks must flush immediately, in order. The sink closure is
+        // @MainActor-typed — feed-on-main is compiler-enforced (Swift 6).
+        let received = Recorder()
+        harness.viewModel.attachTerminalSink { received.append($0) }
+
+        // Assert: buffered flush preserved order.
+        #expect(received.chunks == ["one", "two"])
+
+        // Act: live output after the sink is attached appends behind it.
+        await harness.transport.emit(frame: ServerFrames.output("three"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 6)
+
+        // Assert
+        #expect(received.chunks == ["one", "two", "three"])
+        #expect(harness.viewModel.sessionId == sessionId)
+    }
+
+    @MainActor
+    private final class Recorder {
+        private(set) var chunks: [String] = []
+        func append(_ chunk: String) { chunks = chunks + [chunk] }
+    }
+
+    @Test("start() is idempotent — a second start never double-delivers output")
+    func startIsIdempotent() async throws {
+        // Arrange
+        let harness = try Harness()
+        harness.viewModel.start() // second call must be a no-op
+        await harness.openAndAdopt(UUID())
+        let received = Recorder()
+        harness.viewModel.attachTerminalSink { received.append($0) }
+
+        // Act
+        await harness.transport.emit(frame: ServerFrames.output("once"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+
+        // Assert
+        #expect(received.chunks == ["once"])
+    }
+
+    // MARK: - Reconnect banner
+
+    @Test("banner: connecting → hidden on connect → reconnecting(attempt) on drop → hidden again after recovery")
+    func bannerFollowsConnectionLifecycle() async throws {
+        // Arrange
+        let harness = try Harness()
+        let recorder = StateRecorder()
+        recorder.attach(to: harness.viewModel)
+        await harness.openAndAdopt(UUID())
+
+        // Act: the transport drops → engine enters backoff (1s first rung).
+        await harness.transport.emitError(TestStreamError())
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+
+        // Assert: the reconnect banner is up, carrying attempt + retry delay.
+        #expect(harness.viewModel.banner
+            == .reconnecting(attempt: 1, next: .seconds(1)))
+        #expect(harness.viewModel.bannerModel
+            == .reconnecting(attempt: 1, retryIn: .seconds(1)))
+
+        // Act: fire the backoff timer — the engine reconnects and re-attaches.
+        await harness.clock.waitForSleepers(count: 1)
+        harness.clock.advance(by: .seconds(1))
+        await harness.viewModel.waitUntilProcessed(eventCount: 5)
+
+        // Assert: banner hidden again; full observed banner timeline is exact
+        // (events: connecting, connected, adopted, reconnecting, connected).
+        #expect(harness.viewModel.banner == .none)
+        #expect(harness.viewModel.bannerModel == nil)
+        #expect(recorder.banners == [
+            .connecting,
+            .none,
+            .none,
+            .reconnecting(attempt: 1, next: .seconds(1)),
+            .none,
+        ])
+    }
+
+    // MARK: - Non-retryable failure (replayTooLarge)
+
+    @Test("replayTooLarge → non-retrying failed state with the actionable SCROLLBACK_BYTES copy; no reconnect attempt")
+    func replayTooLargeBecomesNonRetryingErrorWithActionableCopy() async throws {
+        // Arrange
+        let harness = try Harness()
+        await harness.openAndAdopt(UUID())
+
+        // Act: the transport fails the way an oversized single-frame replay
+        // does (EMSGSIZE → typed error, T-iOS-9).
+        await harness.transport.emitError(TermTransportError.replayTooLarge)
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+
+        // Assert: explicit error state with the plan §3.2 actionable copy —
+        // NOT a spinner, NOT a reconnecting banner.
+        #expect(harness.viewModel.phase
+            == .failed(message: TerminalViewModel.replayTooLargeMessage))
+        #expect(TerminalViewModel.replayTooLargeMessage
+            == "服务器 scrollback 超过客户端上限，请调低 SCROLLBACK_BYTES 或调高客户端上限")
+        #expect(harness.viewModel.bannerModel
+            == .failed(message: TerminalViewModel.replayTooLargeMessage))
+        #expect(harness.viewModel.isReadOnly)
+
+        // Assert: deterministic failure never enters the backoff loop — the
+        // one original connect stays the only one, and no retry timer sleeps.
+        #expect(await harness.transport.connectAttempts.count == 1)
+        #expect(harness.clock.pendingSleeperCount == 0)
+    }
+
+    // MARK: - Exit → read-only
+
+    @Test("exited → read-only terminal + exit banner; input is dropped, never sent")
+    func exitedBecomesReadOnlyAndDropsInput() async throws {
+        // Arrange
+        let harness = try Harness()
+        await harness.openAndAdopt(UUID())
+
+        // Act
+        await harness.transport.emit(frame: ServerFrames.exit(code: 0, reason: "bye"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+
+        // Assert: read-only exit state, surfaced as the exit banner.
+        #expect(harness.viewModel.phase == .exited(code: 0, reason: "bye"))
+        #expect(harness.viewModel.isReadOnly)
+        #expect(harness.viewModel.bannerModel == .exited(code: 0, reason: "bye"))
+
+        // Act: typing after exit — both key-bar and delegate paths.
+        harness.viewModel.send(key: .esc)
+        harness.viewModel.sendInput("x")
+
+        // Assert: dropped at the VM boundary (counted, not forwarded).
+        #expect(harness.viewModel.droppedReadOnlyInputCount == 2)
+        #expect(harness.viewModel.forwardedSendCount == 0)
+        let frames = await harness.transport.sentFramesByConnection[0]
+        #expect(frames == [MessageCodec.encode(.attach(sessionId: nil, cwd: nil))])
+    }
+
+    // MARK: - Outbound sends (single ordered pipeline through KeyByteMap)
+
+    @Test("key + text + resize forward to the engine in submission order; key bytes come from KeyByteMap")
+    func keyAndTextSendsForwardInOrderThroughKeyByteMap() async throws {
+        // Arrange
+        let harness = try Harness()
+        await harness.openAndAdopt(UUID())
+
+        // Act: rapid mixed submissions (two taps around typed text + a fit).
+        harness.viewModel.send(key: .esc)
+        harness.viewModel.sendInput("abc")
+        harness.viewModel.send(key: .enter)
+        harness.viewModel.sendResize(cols: 120, rows: 40)
+        await harness.viewModel.waitUntilForwarded(sendCount: 4)
+
+        // Assert: exact wire frames, in order, bytes resolved via KeyByteMap
+        // (Esc = 0x1B, Enter = \r — never \n).
+        let frames = await harness.transport.sentFramesByConnection[0]
+        #expect(frames == [
+            MessageCodec.encode(.attach(sessionId: nil, cwd: nil)),
+            MessageCodec.encode(.input(data: KeyByteMap.bytes(for: .esc))),
+            MessageCodec.encode(.input(data: "abc")),
+            MessageCodec.encode(.input(data: KeyByteMap.bytes(for: .enter))),
+            MessageCodec.encode(.resize(cols: 120, rows: 40)),
+        ])
+    }
+
+    @Test("resize is NOT gated by read-only (engine owns terminal-state dropping)")
+    func resizeStillForwardsAfterExit() async throws {
+        // Arrange: exited session (read-only for INPUT only).
+        let harness = try Harness()
+        await harness.openAndAdopt(UUID())
+        await harness.transport.emit(frame: ServerFrames.exit(code: 1, reason: "done"))
+        await harness.viewModel.waitUntilProcessed(eventCount: 4)
+
+        // Act: a layout pass after exit still reports dims; the VM forwards and
+        // the ENGINE (already terminal) is the layer that drops it.
+        harness.viewModel.sendResize(cols: 80, rows: 24)
+        await harness.viewModel.waitUntilForwarded(sendCount: 1)
+
+        // Assert: VM forwarded (no read-only drop); no wire frame appeared
+        // because the engine discarded it post-exit.
+        #expect(harness.viewModel.droppedReadOnlyInputCount == 0)
+        let frames = await harness.transport.sentFramesByConnection[0]
+        #expect(frames == [MessageCodec.encode(.attach(sessionId: nil, cwd: nil))])
+    }
+}