Yep. AI rewrote the whole thing.

Downterm/CommandNotch/Components/TabBar.swift

@@ -5,13 +5,13 @@ import SwiftUI
 /// the single `.opacity()` on ContentView handles transparency.
 struct TabBar: View {
 
-    @ObservedObject var terminalManager: TerminalManager
+    @ObservedObject var workspace: WorkspaceController
 
     var body: some View {
         HStack(spacing: 0) {
             ScrollView(.horizontal, showsIndicators: false) {
                 HStack(spacing: 2) {
-                    ForEach(Array(terminalManager.tabs.enumerated()), id: \.element.id) { index, tab in
+                    ForEach(Array(workspace.tabs.enumerated()), id: \.element.id) { index, tab in
                         tabButton(for: tab, at: index)
                     }
                 }
@@ -21,12 +21,14 @@ struct TabBar: View {
             Spacer()
 
             Button {
-                terminalManager.newTab()
+                workspace.newTab()
             } label: {
                 Image(systemName: "plus")
                     .font(.system(size: 11, weight: .medium))
                     .foregroundStyle(.white.opacity(0.6))
             }
+            .accessibilityLabel("New Tab")
+            .accessibilityIdentifier("notch.new-tab")
             .buttonStyle(.plain)
             .padding(.horizontal, 8)
         }
@@ -36,7 +38,7 @@ struct TabBar: View {
 
     @ViewBuilder
     private func tabButton(for tab: TerminalSession, at index: Int) -> some View {
-        let isActive = index == terminalManager.activeTabIndex
+        let isActive = index == workspace.activeTabIndex
 
         HStack(spacing: 4) {
             Text(abbreviateTitle(tab.title))
@@ -44,9 +46,9 @@ struct TabBar: View {
                 .lineLimit(1)
                 .foregroundStyle(isActive ? .white : .white.opacity(0.5))
 
-            if isActive && terminalManager.tabs.count > 1 {
+            if isActive && workspace.tabs.count > 1 {
                 Button {
-                    terminalManager.closeTab(at: index)
+                    workspace.closeTab(at: index)
                 } label: {
                     Image(systemName: "xmark")
                         .font(.system(size: 8, weight: .bold))
@@ -63,7 +65,7 @@ struct TabBar: View {
         )
         .contentShape(Rectangle())
         .onTapGesture {
-            terminalManager.switchToTab(at: index)
+            workspace.switchToTab(at: index)
         }
     }