fix: report the unfolded screen size in device.info on foldables

DeviceKitTests/JSONRPC/Handlers/DeviceInfo.swift

@@ -13,11 +13,12 @@ struct DeviceInfoMethodHandler: RPCMethodHandler {
 
         let start = Date()
 
+        // springboard reports the cover display's frame even when unfolded
         let springboard = XCUIApplication(bundleIdentifier: "com.apple.springboard")
-        let frame = springboard.frame
+        let size = OrientationGeometry.secondaryDisplaySize() ?? springboard.frame.size
         let scale = Int(UIScreen.main.scale)
-        let width = Int(frame.width)
-        let height = Int(frame.height)
+        let width = Int(size.width)
+        let height = Int(size.height)
 
         let duration = Date().timeIntervalSince(start)
         logger.info("Device info took \(duration), screen: \(width)x\(height)@\(scale)x")

DeviceKitTests/XCTest/OrientationGeometry.swift

@@ -102,6 +102,20 @@ struct OrientationGeometry {
         return windows.first { $0.displayID != 0 && $0.displayID != mainDisplayID }?.displayID
     }
 
+    // portrait size of the unfolded inner display, nil when the app is on the
+    // main display. single-display devices skip the foreground app lookup
+    static func secondaryDisplaySize() -> CGSize? {
+        guard isMultiDisplay() else {
+            return nil
+        }
+
+        let geometry = current()
+        guard geometry.displayID != nil else {
+            return nil
+        }
+        return CGSize(width: geometry.portraitWidth, height: geometry.portraitHeight)
+    }
+
     private static func isMultiDisplay() -> Bool {
         XCUIScreen.screens.count > 1
     }