Refactor and Rename to CommandNotch

Downterm/CommandNotch/Components/TabBar.swift

@@ -0,0 +1,73 @@
+import SwiftUI
+
+/// Horizontal tab bar at the bottom of the open notch panel.
+/// Solid black background to match the rest of the notch —
+/// the single `.opacity()` on ContentView handles transparency.
+struct TabBar: View {
+
+    @ObservedObject var terminalManager: TerminalManager
+
+    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
+                        tabButton(for: tab, at: index)
+                    }
+                }
+                .padding(.horizontal, 4)
+            }
+
+            Spacer()
+
+            Button {
+                terminalManager.newTab()
+            } label: {
+                Image(systemName: "plus")
+                    .font(.system(size: 11, weight: .medium))
+                    .foregroundStyle(.white.opacity(0.6))
+            }
+            .buttonStyle(.plain)
+            .padding(.horizontal, 8)
+        }
+        .frame(height: 28)
+        .background(.black)
+    }
+
+    @ViewBuilder
+    private func tabButton(for tab: TerminalSession, at index: Int) -> some View {
+        let isActive = index == terminalManager.activeTabIndex
+
+        HStack(spacing: 4) {
+            Text(abbreviateTitle(tab.title))
+                .font(.system(size: 11))
+                .lineLimit(1)
+                .foregroundStyle(isActive ? .white : .white.opacity(0.5))
+
+            if isActive && terminalManager.tabs.count > 1 {
+                Button {
+                    terminalManager.closeTab(at: index)
+                } label: {
+                    Image(systemName: "xmark")
+                        .font(.system(size: 8, weight: .bold))
+                        .foregroundStyle(.white.opacity(0.4))
+                }
+                .buttonStyle(.plain)
+            }
+        }
+        .padding(.horizontal, 10)
+        .padding(.vertical, 4)
+        .background(
+            RoundedRectangle(cornerRadius: 6)
+                .fill(isActive ? Color.white.opacity(0.12) : Color.clear)
+        )
+        .contentShape(Rectangle())
+        .onTapGesture {
+            terminalManager.switchToTab(at: index)
+        }
+    }
+
+    private func abbreviateTitle(_ title: String) -> String {
+        title.count <= 24 ? title : String(title.prefix(22)) + "…"
+    }
+}