Refactor and Rename to CommandNotch

Downterm/CommandNotch/Managers/PopoutWindowController.swift

@@ -0,0 +1,87 @@
+import AppKit
+import SwiftUI
+import Combine
+
+/// Manages standalone pop-out terminal windows for detached tabs.
+/// Each detached tab gets its own resizable window with the terminal view.
+@MainActor
+class PopoutWindowController: NSObject, NSWindowDelegate {
+
+    static let shared = PopoutWindowController()
+
+    /// Tracks open pop-out windows so they aren't released prematurely.
+    private var windows: [UUID: NSWindow] = [:]
+    private var sessions: [UUID: TerminalSession] = [:]
+    private var titleObservers: [UUID: AnyCancellable] = [:]
+
+    private override init() {
+        super.init()
+    }
+
+    /// Creates a new standalone window for the given terminal session.
+    func popout(session: TerminalSession) {
+        let windowID = session.id
+
+        if let existingWindow = windows[windowID] {
+            existingWindow.makeKeyAndOrderFront(nil)
+            NSApp.activate(ignoringOtherApps: true)
+            return
+        }
+
+        let win = NSWindow(
+            contentRect: NSRect(x: 0, y: 0, width: 720, height: 480),
+            styleMask: [.titled, .closable, .resizable, .miniaturizable],
+            backing: .buffered,
+            defer: false
+        )
+        win.title = session.title
+        win.appearance = NSAppearance(named: .darkAqua)
+        win.backgroundColor = .black
+        win.delegate = self
+        win.isReleasedWhenClosed = false
+
+        let hostingView = NSHostingView(
+            rootView: SwiftTermView(session: session)
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
+                .background(Color.black)
+                .preferredColorScheme(.dark)
+        )
+        hostingView.frame = NSRect(origin: .zero, size: win.contentRect(forFrameRect: win.frame).size)
+        win.contentView = hostingView
+
+        win.center()
+        win.makeKeyAndOrderFront(nil)
+        NSApp.activate(ignoringOtherApps: true)
+
+        windows[windowID] = win
+        sessions[windowID] = session
+
+        // Update window title when the terminal title changes
+        titleObservers[windowID] = session.$title
+            .receive(on: RunLoop.main)
+            .sink { [weak win] title in win?.title = title }
+    }
+
+    // MARK: - NSWindowDelegate
+
+    func windowDidBecomeKey(_ notification: Notification) {
+        guard let window = notification.object as? NSWindow,
+              let entry = windows.first(where: { $0.value === window }),
+              let terminalView = sessions[entry.key]?.terminalView,
+              terminalView.window === window else { return }
+
+        window.makeFirstResponder(terminalView)
+    }
+
+    func windowWillClose(_ notification: Notification) {
+        guard let closingWindow = notification.object as? NSWindow else { return }
+
+        // Find which session this window belongs to and clean up
+        if let entry = windows.first(where: { $0.value === closingWindow }) {
+            sessions[entry.key]?.terminate()
+            sessions.removeValue(forKey: entry.key)
+            windows.removeValue(forKey: entry.key)
+            titleObservers.removeValue(forKey: entry.key)
+        }
+    }
+}