Center the print dialog over the app window.

Co-authored-by: Cursor <cursoragent@cursor.com>

smart_printer/PrintService.swift

@@ -164,14 +164,19 @@ enum PrintService {
         ])
 
         NSApp.activate(ignoringOtherApps: true)
-        window?.makeKeyAndOrderFront(nil)
+        let parentWindow = window ?? NSApp.keyWindow ?? NSApp.mainWindow
+        parentWindow?.makeKeyAndOrderFront(nil)
 
-        let observer = observePrintPanelTrafficLights()
+        let observer = observePrintPanelAppearance(relativeTo: parentWindow)
         defer { NotificationCenter.default.removeObserver(observer) }
-        _ = operation.run()
+        if let parentWindow {
+            operation.runModal(for: parentWindow, delegate: nil, didRun: nil, contextInfo: nil)
+        } else {
+            _ = operation.run()
+        }
     }
 
-    private static func observePrintPanelTrafficLights() -> NSObjectProtocol {
+    private static func observePrintPanelAppearance(relativeTo parentWindow: NSWindow?) -> NSObjectProtocol {
         NotificationCenter.default.addObserver(
             forName: NSWindow.didBecomeKeyNotification,
             object: nil,
@@ -179,13 +184,28 @@ enum PrintService {
         ) { notification in
             guard let panelWindow = notification.object as? NSWindow,
                   isPrintPanelWindow(panelWindow) else { return }
-            hideTrafficLights(on: panelWindow)
+            configurePrintPanelWindow(panelWindow, relativeTo: parentWindow)
             DispatchQueue.main.async {
-                hideTrafficLights(on: panelWindow)
+                configurePrintPanelWindow(panelWindow, relativeTo: parentWindow)
             }
         }
     }
 
+    private static func configurePrintPanelWindow(_ panelWindow: NSWindow, relativeTo parentWindow: NSWindow?) {
+        hideTrafficLights(on: panelWindow)
+        if let parentWindow {
+            center(panelWindow, relativeTo: parentWindow)
+        }
+    }
+
+    private static func center(_ panelWindow: NSWindow, relativeTo parentWindow: NSWindow) {
+        let parentFrame = parentWindow.frame
+        var panelFrame = panelWindow.frame
+        panelFrame.origin.x = parentFrame.midX - panelFrame.width / 2
+        panelFrame.origin.y = parentFrame.midY - panelFrame.height / 2
+        panelWindow.setFrame(panelFrame, display: true)
+    }
+
     private static func isPrintPanelWindow(_ window: NSWindow) -> Bool {
         let className = String(describing: type(of: window))
         if className.localizedCaseInsensitiveContains("printpanel") {