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/Wiring/RootView.swift

@@ -28,12 +28,35 @@ struct RootView: View {
         .onChange(of: scenePhase) { _, phase in
             coordinator.handleScenePhase(phase)
         }
+        .onOpenURL { coordinator.handleDeepLink(url: $0) } // T-iOS-22
+        .alert(DeepLinkCopy.hintTitle, isPresented: deepLinkHintBinding) {
+            Button(DeepLinkCopy.hintConfirm) { coordinator.deepLink.clearHint() }
+        } message: {
+            Text(coordinator.deepLink.hintMessage ?? "")
+        }
         .sheet(
             isPresented: $coordinator.isAddHostPresented,
             onDismiss: { coordinator.addHostDismissed() }
         ) {
             addHostSheet
         }
+        .sheet(
+            isPresented: $coordinator.isProjectsPresented,
+            onDismiss: { coordinator.projectsDismissed() }
+        ) {
+            projectsSheet
+        }
+    }
+
+    /// Deep-link hint alert (unknown host / store failure, T-iOS-22).
+    private var deepLinkHintBinding: Binding<Bool> {
+        Binding(
+            get: { coordinator.deepLink.hintMessage != nil },
+            set: { presented in
+                guard !presented else { return }
+                coordinator.deepLink.clearHint()
+            }
+        )
     }
 
     // MARK: - Route switch
@@ -66,6 +89,22 @@ struct RootView: View {
             onAddHost: { coordinator.presentAddHost() }
         )
         .safeAreaInset(edge: .bottom) { continueLastBanner }
+        // T-iOS-26 · Projects 入口挂在 RootView 层（SessionListScreen 是
+        // T-iOS-23 的 W7 独占文件 —— 列表侧入口整合移交给它）。leading 位，
+        // 避开列表自己的 topBarTrailing hostMenu。
+        .toolbar { projectsToolbarItem }
+    }
+
+    @ToolbarContentBuilder private var projectsToolbarItem: some ToolbarContent {
+        ToolbarItem(placement: .topBarLeading) {
+            Button {
+                coordinator.presentProjects()
+            } label: {
+                Label(RootCopy.projects, systemImage: "folder")
+            }
+            .disabled(coordinator.sessionList.activeHost == nil)
+            .accessibilityIdentifier("sessions.projectsButton")
+        }
     }
 
     // MARK: - "继续上次" highlight (cold start step 5)
@@ -99,7 +138,17 @@ struct RootView: View {
 
     @ViewBuilder private var terminalDestination: some View {
         if let controller = coordinator.terminalController {
-            TerminalContainerView(controller: controller)
+            TerminalContainerView(
+                controller: controller,
+                onNewSessionInCwd: { coordinator.openNewSessionInCurrentCwd() }
+            )
+            // T-iOS-29 · identity PER CONTROLLER: an in-place session switch
+            // (new-in-cwd, deep link) swaps the controller while the
+            // destination stays presented — without a new identity SwiftUI
+            // keeps the old SwiftTerm UIView and the new ViewModel's output
+            // sink never attaches (makeUIView never re-runs). Also resets the
+            // container's per-session @State (plan-gate dismissal, timeline).
+            .id(controller.id)
         }
     }
 
@@ -114,6 +163,20 @@ struct RootView: View {
             }
         }
     }
+
+    // MARK: - Projects sheet (T-iOS-26)
+
+    /// 自带 NavigationStack：列表 → 详情 → 差异都在 sheet 内 push；
+    /// "在此仓库开新会话" 关掉 sheet 并在根导航推入终端。
+    @ViewBuilder private var projectsSheet: some View {
+        if let viewModel = coordinator.projectsViewModel {
+            NavigationStack {
+                ProjectsScreen(viewModel: viewModel) { request in
+                    coordinator.openProject(request)
+                }
+            }
+        }
+    }
 }
 
 private enum RootMetrics {
@@ -123,4 +186,5 @@ private enum RootMetrics {
 
 private enum RootCopy {
     static let continueLast = "继续上次会话"
+    static let projects = "项目"
 }