feat(ios): P1-B — W7 UI wave: deep links, timeline, quick-reply, diff, projects, session switcher, thumbnails, lock-screen push

T-iOS-22: DeepLinkRouter (full-field whitelist, cold-start stash, route(from:) for push-tap reuse), 21 tests
T-iOS-24: TimelineSheet mirroring web render() order; disabled→empty-state; reuses AwayDigest onExpand
T-iOS-25: QuickReply chips (built-ins mirror quick-reply.ts via KeyByteMap; visible iff live gate && !readOnly)
T-iOS-27: read-only DiffScreen + App-layer DiffFetcher (RO no-Origin; APIClient fold-in noted for T-iOS-38 owner)
T-iOS-26: Projects list/detail — grouping byte-identical to web group keys (prefs-shared collapse state),
prefs-clobber defenses (no blind PUT on empty base; adopt server echo), claude\r bootstrap
T-iOS-23: UnreadLedger + TitleSanitizer (SessionCore, +15 tests), lastOutputAt decode, list-boundary re-sanitize
T-iOS-29: new-in-cwd (untrusted cwd, no bootstrap re-injection) + exited-session reopen; fixes stale-controller
SwiftTerm view bug via .id(controller.id)
T-iOS-28: offscreen SwiftTerm thumbnail pipeline (LRU 32, concurrency gate 2, 256KiB cap, grid clamp)
T-iOS-21: PushRegistrar (WEBTERM_GATE category: Allow=.authenticationRequired, no .foreground) +
NotificationActionHandler (whitelisted payload, token never persisted, bg-task-wrapped POST, 403 fallback)
CRITICAL fix (verify-found boot crash): @Sendable literals on UN completion closures — MainActor-inherited
closures trapped Swift 6 executor check on UN's background queue; boot re-verified (no new crash reports,
permission prompt reached, privacy shade correctly covering during system alert)
Verified: 261 pkg + 247 app + 10 integration tests green; 7/7 semantics checks; Owns audit clean

ios/App/WebTerm/Components/ReconnectBanner.swift

@@ -19,6 +19,11 @@ struct ReconnectBanner: View {
     }
 
     let model: Model
+    /// T-iOS-29 · "开新会话" on the EXITED banner only (session over → the
+    /// natural next step; manager.ts:145-153 — the old session is done for
+    /// good). nil = affordance hidden. Not offered on `.failed`: that copy
+    /// asks the user to change a knob first, not to spawn again.
+    var onNewSession: (@MainActor () -> Void)? = nil
 
     private enum Metrics {
         static let contentSpacing: CGFloat = 8
@@ -27,6 +32,10 @@ struct ReconnectBanner: View {
         static let backgroundOpacity = 0.9
     }
 
+    private enum Copy {
+        static let newSession = "开新会话"
+    }
+
     var body: some View {
         HStack(spacing: Metrics.contentSpacing) {
             if isSpinning {
@@ -38,6 +47,12 @@ struct ReconnectBanner: View {
             Text(text)
                 .font(.footnote)
                 .multilineTextAlignment(.leading)
+            if let onNewSession, Self.isNewSessionActionAvailable(for: model) {
+                Button(Copy.newSession) { onNewSession() }
+                    .font(.footnote.bold())
+                    .buttonStyle(.plain)
+                    .accessibilityIdentifier("terminal.exitNewSessionButton")
+            }
         }
         .padding(.horizontal, Metrics.horizontalPadding)
         .padding(.vertical, Metrics.verticalPadding)
@@ -46,6 +61,13 @@ struct ReconnectBanner: View {
         .accessibilityElement(children: .combine)
     }
 
+    /// The new-session affordance appears on the `.exited` banner only —
+    /// pure predicate so the T-iOS-29 tests pin the rule.
+    static func isNewSessionActionAvailable(for model: Model) -> Bool {
+        if case .exited = model { return true }
+        return false
+    }
+
     private var isSpinning: Bool {
         switch model {
         case .connecting, .reconnecting: return true