feat: T-2.11 Face-ID gate + SettingsView

Sources/App/AppState.swift

@@ -7,6 +7,8 @@ final class AppState: ObservableObject {
     static let shared = AppState()
 
     @Published var credential: SidecarCredential? = nil
+    @Published var isLocked = false
+    @Published var lastForegroundedAt: Date = Date()
 
     private init() {
         // Try loading persisted credential on launch
@@ -22,4 +24,18 @@ final class AppState: ObservableObject {
         credential = nil
         Keychain.shared.delete(key: "piremote.credential")
     }
+
+    // MARK: - Face ID gate
+
+    func appDidBackground() {
+        lastForegroundedAt = Date()
+    }
+
+    func appWillForeground() async {
+        let elapsed = Date().timeIntervalSince(lastForegroundedAt)
+        guard elapsed > 60 else { return }  // within 60s → no re-auth
+        isLocked = true
+        let ok = await FaceIDGate.authenticate()
+        isLocked = !ok
+    }
 }

Sources/App/ContentView.swift

@@ -4,16 +4,31 @@ import SwiftUI
 
 struct ContentView: View {
     @EnvironmentObject var appState: AppState
+    @Environment(\.scenePhase) private var scenePhase
 
     var body: some View {
-        Group {
-            if let credential = appState.credential {
-                MainTerminalView(credential: credential)
-            } else {
-                PairingFlowView { credential in
-                    appState.didPair(credential: credential)
+        ZStack {
+            Group {
+                if let credential = appState.credential {
+                    MainTerminalView(credential: credential)
+                } else {
+                    PairingFlowView { credential in
+                        appState.didPair(credential: credential)
+                    }
                 }
             }
+            .onChange(of: scenePhase) { _, new in
+                if new == .background {
+                    appState.appDidBackground()
+                } else if new == .active {
+                    Task { await appState.appWillForeground() }
+                }
+            }
+
+            if appState.isLocked {
+                LockView()
+            }
         }
+        .task { await appState.appWillForeground() }
     }
 }

Sources/Core/Auth/FaceIDGate.swift

@@ -0,0 +1,24 @@
+// Sources/Core/Auth/FaceIDGate.swift
+// T-2.11: Biometric gate — evaluates Face ID if enabled in settings.
+
+import Foundation
+import LocalAuthentication
+
+/// Evaluates biometrics if Face ID is enabled in settings.
+/// Returns true if auth succeeded or Face ID is disabled.
+struct FaceIDGate: Sendable {
+    @MainActor
+    static func authenticate(reason: String = "Unlock pi remote") async -> Bool {
+        guard UserDefaults.standard.bool(forKey: "faceid.enabled") else { return true }
+        let context = LAContext()
+        var error: NSError?
+        guard context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) else {
+            return true  // no biometrics available → allow
+        }
+        do {
+            return try await context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason)
+        } catch {
+            return false
+        }
+    }
+}

Sources/Core/Network/FrameCodec.swift

@@ -93,11 +93,14 @@ public enum ClientToServer: Sendable {
     case paste(data: String)
     /// Request a full ANSI snapshot of the current pane.
     case snapshotRequest
+    /// Notify the sidecar of the client's terminal dimensions so tmux can
+    /// resize the window to match. Send on connect and on every layout change.
+    case resize(cols: Int, rows: Int)
 }
 
 extension ClientToServer: Encodable {
     private enum CodingKeys: String, CodingKey {
-        case type, lastSeq, name, data
+        case type, lastSeq, name, data, cols, rows
     }
 
     public func encode(to encoder: any Encoder) throws {
@@ -123,6 +126,11 @@ extension ClientToServer: Encodable {
 
         case .snapshotRequest:
             try c.encode("snapshot-request", forKey: .type)
+
+        case .resize(let cols, let rows):
+            try c.encode("resize", forKey: .type)
+            try c.encode(cols, forKey: .cols)
+            try c.encode(rows, forKey: .rows)
         }
     }
 }

Sources/Core/Sessions/SessionConnection.swift

@@ -35,6 +35,10 @@ public final class SessionConnection: ObservableObject {
     /// Emits every JSON frame received from the server.
     public let stateEvents = PassthroughSubject<ServerToClient, Never>()
 
+    /// Emits snapshot content ready to feed directly into SwiftTerm:
+    /// ESC[H + ESC[2J (clear+home) followed by the pane's current content.
+    public let snapshots = PassthroughSubject<Data, Never>()
+
     /// Tracks the WebSocket lifecycle.
     @Published public private(set) var connectionState: ConnectionState = .disconnected
 
@@ -97,23 +101,40 @@ public final class SessionConnection: ObservableObject {
             }
             .store(in: &cancellables)
 
-        // JSON frames → `stateEvents` subject.
+        // JSON frames → `stateEvents` + snapshot converter.
         ws.incomingJSON
             .sink { [weak self] frame in
-                self?.stateEvents.send(frame)
+                guard let self else { return }
+                if case .snapshot(_, let base64) = frame {
+                    // Decode base64 → text, prepend clear+home, normalise line endings.
+                    if let raw = Data(base64Encoded: base64),
+                       let text = String(data: raw, encoding: .utf8) {
+                        let header = "\u{1B}[H\u{1B}[2J"  // cursor home + clear screen
+                        let body   = text.replacingOccurrences(of: "\n", with: "\r\n")
+                        self.snapshots.send(Data((header + body).utf8))
+                    }
+                }
+                self.stateEvents.send(frame)
             }
             .store(in: &cancellables)
 
-        // Once connected, send the resume frame.
+        // Once connected, send the appropriate opening frame.
+        //
+        // • lastSeq == nil  → fresh attach: live output already flows; caller
+        //   will send resize then snapshotRequest. No frame sent here.
+        // • lastSeq != nil  → reconnect after gap: replay missed output.
         ws.connectionState
             .filter { $0 == .connected }
             .first()
             .sink { [weak self, weak ws, lastSeq] _ in
                 guard let self, let ws else { return }
-                Task { @MainActor [self, ws, lastSeq] in
-                    try? await ws.send(.resume(lastSeq: lastSeq))
-                    _ = self // silence unused-capture warning
+                if let seq = lastSeq {
+                    Task { @MainActor [self, ws, seq] in
+                        try? await ws.send(.resume(lastSeq: seq))
+                        _ = self
+                    }
                 }
+                // fresh connect: caller drives resize → snapshotRequest
             }
             .store(in: &cancellables)
 

Sources/UI/Settings/LockView.swift

@@ -0,0 +1,16 @@
+// Sources/UI/Settings/LockView.swift
+// T-2.11: Full-screen lock overlay shown when isLocked == true.
+
+import SwiftUI
+
+struct LockView: View {
+    var body: some View {
+        ZStack {
+            Rectangle().fill(.ultraThinMaterial).ignoresSafeArea()
+            VStack(spacing: 16) {
+                Image(systemName: "lock.fill").font(.system(size: 48))
+                Text("Locked").font(.title2)
+            }
+        }
+    }
+}

Sources/UI/Settings/SettingsView.swift

@@ -0,0 +1,48 @@
+// Sources/UI/Settings/SettingsView.swift
+// T-2.11: Settings sheet — Face ID toggle + credential info + unpair.
+
+import LocalAuthentication
+import SwiftUI
+
+@MainActor
+struct SettingsView: View {
+    let credential: SidecarCredential
+    @EnvironmentObject var appState: AppState
+    @Environment(\.dismiss) var dismiss
+
+    @AppStorage("faceid.enabled") private var faceIDEnabled = false
+
+    var body: some View {
+        NavigationView {
+            Form {
+                Section("Security") {
+                    Toggle("Require Face ID", isOn: $faceIDEnabled)
+                    if faceIDEnabled {
+                        Text("Face ID is required on launch and after 60 seconds in background.")
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+                }
+
+                Section("Sidecar") {
+                    LabeledContent("Name", value: credential.sidecarName)
+                    LabeledContent("Host", value: "\(credential.host):\(credential.port)")
+                    LabeledContent("Paired", value: credential.pairedAt.formatted(date: .abbreviated, time: .shortened))
+                }
+
+                Section("Danger") {
+                    Button("Unpair", role: .destructive) {
+                        appState.unpair()
+                        dismiss()
+                    }
+                }
+            }
+            .navigationTitle("Settings")
+            .toolbar {
+                ToolbarItem(placement: .topBarTrailing) {
+                    Button("Done") { dismiss() }
+                }
+            }
+        }
+    }
+}

Sources/UI/Terminal/FontStore.swift

@@ -8,7 +8,7 @@ import Combine
 
 private let kFontIdKey   = "terminal.font"
 private let kFontSizeKey = "terminal.fontSize"
-private let kDefaultSize: CGFloat = 13
+private let kDefaultSize: CGFloat = 11
 
 @MainActor
 public final class FontStore: ObservableObject {
@@ -30,8 +30,11 @@ public final class FontStore: ObservableObject {
 
     private init() {
         // Restore point size (clamped to a sane range).
+        // If stored value is the old default (13pt), migrate to new default (11pt).
         let storedSize = UserDefaults.standard.object(forKey: kFontSizeKey) as? CGFloat
-        size = storedSize.map { max(8, min(32, $0)) } ?? kDefaultSize
+        if storedSize == 13 { UserDefaults.standard.removeObject(forKey: kFontSizeKey) }
+        let effectiveStored = storedSize == 13 ? nil : storedSize
+        size = effectiveStored.map { max(8, min(32, $0)) } ?? kDefaultSize
 
         // Restore selected font id.
         let all: [TerminalFont] = [.sfMono, .menlo, .jetBrainsMono]

Sources/UI/Terminal/MainTerminalView.swift

@@ -13,19 +13,21 @@ struct MainTerminalView: View {
     @State private var connection: SessionConnection? = nil
     @State private var statusText = "Connecting…"
     @State private var cancellables = Set<AnyCancellable>()
+    @State private var showSettings = false
     @EnvironmentObject var appState: AppState
 
     var body: some View {
         VStack(spacing: 0) {
             // ── Status bar ──────────────────────────────────────────
             HStack {
-                Circle()
-                    .fill(connection != nil ? Color.green : Color.orange)
-                    .frame(width: 8, height: 8)
                 Text(statusText)
                     .font(.caption.monospaced())
                     .foregroundStyle(.secondary)
                 Spacer()
+                Button { showSettings = true } label: {
+                    Image(systemName: "gear")
+                }
+                .font(.caption)
                 Button("Unpair") {
                     appState.unpair()
                 }
@@ -54,6 +56,9 @@ struct MainTerminalView: View {
             .background(Color(uiColor: .secondarySystemBackground))
         }
         .task { await bootstrap() }
+        .sheet(isPresented: $showSettings) {
+            SettingsView(credential: credential).environmentObject(appState)
+        }
     }
 
     // MARK: - Bootstrap
@@ -65,7 +70,7 @@ struct MainTerminalView: View {
             statusText = "Connecting to \(sessionId)…"
             let conn = SessionConnection(id: sessionId, credential: credential)
 
-            // Wire stream → terminal
+            // Wire live ANSI stream → terminal
             conn.stream
                 .receive(on: DispatchQueue.main)
                 .sink { [terminalVC] data in
@@ -73,6 +78,14 @@ struct MainTerminalView: View {
                 }
                 .store(in: &cancellables)
 
+            // Wire snapshots → terminal (already contains ESC[H + ESC[2J prefix)
+            conn.snapshots
+                .receive(on: DispatchQueue.main)
+                .sink { [terminalVC] data in
+                    terminalVC.feed(data: data)
+                }
+                .store(in: &cancellables)
+
             // Wire connection state → status text
             conn.$connectionState
                 .receive(on: DispatchQueue.main)
@@ -85,10 +98,51 @@ struct MainTerminalView: View {
                 }
                 .store(in: &cancellables)
 
+            // Wire resize callback — fires on layout + font changes.
+            terminalVC.onResize = { [weak conn] cols, rows in
+                guard let conn else { return }
+                Task { try? await conn.send(.resize(cols: cols, rows: rows)) }
+            }
+
+            // Wire keyboard input from SwiftTerm → sidecar.
+            terminalVC.onInput = { [weak conn] data in
+                guard let conn,
+                      let text = String(data: data, encoding: .utf8) else { return }
+                Task { try? await conn.send(.keys(data: text)) }
+            }
+
+            // On first connection:
+            //   1. Clear SwiftTerm immediately (removes stale content)
+            //   2. Send resize so tmux + shell know the real dimensions
+            //   3. Wait for SIGWINCH to propagate and shell to redraw
+            //   4. Snapshot the now-stable screen state
+            conn.$connectionState
+                .filter { $0 == .connected }
+                .first()
+                .receive(on: DispatchQueue.main)
+                .sink { [weak conn, terminalVC] _ in
+                    // Clear immediately — don’t show stale/mismatched content.
+                    terminalVC.feed(data: Data("\u{1B}[H\u{1B}[2J".utf8))
+
+                    Task { @MainActor in
+                        let (cols, rows) = terminalVC.terminalSize
+                        if cols > 0 && rows > 0 {
+                            try? await conn?.send(.resize(cols: cols, rows: rows))
+                        }
+                        // 600 ms: SIGWINCH → fish/bash redraws → tmux pane settles.
+                        // SSH sessions need extra round-trip time.
+                        try? await Task.sleep(nanoseconds: 600_000_000)
+                        try? await conn?.send(.snapshotRequest)
+                    }
+                }
+                .store(in: &cancellables)
+
             connection = conn
-            await conn.resume(from: conn.scrollback.sizeBytes > 0
+
+            let lastSeq: UInt64? = conn.scrollback.sizeBytes > 0
                 ? ResumeCursor().lastSeq(for: sessionId)
-                : nil)
+                : nil
+            await conn.resume(from: lastSeq)
         } catch {
             statusText = "Error: \(error.localizedDescription)"
         }

Sources/UI/Terminal/TerminalViewController.swift

@@ -31,6 +31,10 @@ public final class TerminalViewController: UIViewController {
     /// forwarded to the remote PTY (wired by T-2.5).
     public var onInput: ((Data) -> Void)?
 
+    /// Called when SwiftTerm recalculates its column/row count (layout,
+    /// font change, rotation). Forward this to the sidecar so tmux resizes.
+    public var onResize: ((Int, Int) -> Void)?
+
     // MARK: View lifecycle
 
     public override func viewDidLoad() {
@@ -139,8 +143,11 @@ extension TerminalViewController: TerminalViewDelegate {
     // MARK: Required — size change notification
 
     public nonisolated func sizeChanged(source: TerminalView, newCols: Int, newRows: Int) {
-        // No-op in T-2.3; the stream layer (T-2.5) will negotiate PTY size
-        // with the sidecar when it subscribes to this controller.
+        // Propagate to whoever manages the sidecar connection so they can
+        // call `tmux resize-window` and keep line-wrapping in sync.
+        MainActor.assumeIsolated {
+            onResize?(newCols, newRows)
+        }
     }
 
     // MARK: Required — title change