feat(ios): add piRemoteUITests XCUITest target with smoke test

- New target 'piRemoteUITests' (bundle.ui-testing) in project.yml
- TEST_TARGET_NAME=piRemote, deploymentTarget 17.0
- Added to scheme 'piRemote' test targets
- UITests/SmokeUITests.swift: @MainActor smoke test verifying app launches
- Verified: xcodebuild test -only-testing:piRemoteUITests passes (5.8s)

UITests/SmokeUITests.swift

@@ -0,0 +1,23 @@
+// SmokeUITests.swift
+// Minimal smoke test — verifies the UI-testing target is wired correctly.
+// Real feature coverage lives in dedicated UITest files (see PairingUITests,
+// SessionSwitcherUITests, etc.).
+
+import XCTest
+
+@MainActor
+final class SmokeUITests: XCTestCase {
+
+    override func setUpWithError() throws {
+        continueAfterFailure = false
+    }
+
+    /// Launch the app and verify it shows *some* UI within a reasonable
+    /// timeout. This is just a wiring check — feature tests assert specifics.
+    func testAppLaunchesWithoutCrashing() throws {
+        let app = XCUIApplication()
+        app.launch()
+        // Wait for any window to appear.
+        XCTAssertTrue(app.wait(for: .runningForeground, timeout: 10))
+    }
+}

project.yml

@@ -35,6 +35,7 @@ schemes:
       config: Debug
       targets:
         - piRemoteTests
+        - piRemoteUITests
     archive:
       config: Release
 
@@ -82,3 +83,16 @@ targets:
       - path: Tests/CoreTests
     dependencies:
       - target: piRemote
+
+  piRemoteUITests:
+    type: bundle.ui-testing
+    platform: iOS
+    deploymentTarget: "17.0"
+    sources:
+      - path: UITests
+    settings:
+      base:
+        TEST_TARGET_NAME: piRemote
+        PRODUCT_BUNDLE_IDENTIFIER: de.vpsj.pi-remote.uitests
+    dependencies:
+      - target: piRemote