Refactor and Rename to CommandNotch

Downterm/CommandNotch/Managers/SettingsWindowController.swift

@@ -0,0 +1,58 @@
+import AppKit
+import SwiftUI
+
+/// Singleton controller that manages the settings window.
+/// When the settings panel opens, the app becomes a regular app
+/// (visible in Dock / Cmd-Tab). When it closes, the app reverts
+/// to an accessory (menu-bar-only) app.
+class SettingsWindowController: NSObject, NSWindowDelegate {
+
+    static let shared = SettingsWindowController()
+
+    private var window: NSWindow?
+
+    private override init() {
+        super.init()
+    }
+
+    // MARK: - Show / Hide
+
+    func showSettings() {
+        if let existing = window {
+            existing.makeKeyAndOrderFront(nil)
+            NSApp.activate(ignoringOtherApps: true)
+            return
+        }
+
+        let settingsView = SettingsView()
+        let hostingView = NSHostingView(rootView: settingsView)
+
+        let win = NSWindow(
+            contentRect: NSRect(x: 0, y: 0, width: 700, height: 500),
+            styleMask: [.titled, .closable, .resizable],
+            backing: .buffered,
+            defer: false
+        )
+        win.title = "CommandNotch Settings"
+        win.contentView = hostingView
+        win.center()
+        win.delegate = self
+        win.isReleasedWhenClosed = false
+
+        // Appear in Dock while settings are open
+        NSApp.setActivationPolicy(.regular)
+
+        win.makeKeyAndOrderFront(nil)
+        NSApp.activate(ignoringOtherApps: true)
+
+        window = win
+    }
+
+    // MARK: - NSWindowDelegate
+
+    func windowWillClose(_ notification: Notification) {
+        // Revert to accessory (menu-bar-only) mode
+        NSApp.setActivationPolicy(.accessory)
+        window = nil
+    }
+}