Add UI test covering layout + core flows

Verifies:
- Title lives in the top 25% of the screen (guards against letterboxing regressions)
- Plus button opens Add Connection sheet; Cancel dismisses
- Settings gear opens Settings sheet; Done dismisses
- Search field accepts input and keeps the top chrome visible
- Empty-state CTA routes to Add Connection

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Project.yml

@@ -43,3 +43,17 @@ targets:
         product: VNCCore
       - package: VNCUI
         product: VNCUI
+
+  ScreensUITests:
+    type: bundle.ui-testing
+    platform: iOS
+    deploymentTarget: "18.0"
+    sources:
+      - path: ScreensUITests
+    settings:
+      base:
+        PRODUCT_BUNDLE_IDENTIFIER: com.tt.screens.uitests
+        TEST_TARGET_NAME: Screens
+        GENERATE_INFOPLIST_FILE: YES
+    dependencies:
+      - target: Screens

ScreensUITests/ScreensUITests.swift

@@ -0,0 +1,63 @@
+import XCTest
+
+final class ScreensUITests: XCTestCase {
+    override func setUp() {
+        continueAfterFailure = false
+    }
+
+    @MainActor
+    func testLayoutFillsScreenAndCoreFlows() {
+        let app = XCUIApplication()
+        app.launch()
+
+        // ---- Top chrome is present and flush with the safe area top.
+        let title = app.staticTexts["Screens"]
+        XCTAssertTrue(title.waitForExistence(timeout: 5), "Title should appear")
+
+        let screenFrame = app.windows.firstMatch.frame
+        let titleY = title.frame.midY
+        XCTAssertLessThan(titleY, screenFrame.height * 0.25,
+                          "Title should sit in the top 25% of the screen; actual Y \(titleY) in screen \(screenFrame.height)")
+
+        // ---- Tap + to open Add Connection sheet.
+        let addButton = app.buttons["Add connection"]
+        XCTAssertTrue(addButton.exists, "Add button should exist")
+        addButton.tap()
+
+        let displayNameField = app.textFields["Display name"]
+        XCTAssertTrue(displayNameField.waitForExistence(timeout: 2),
+                      "Add Connection sheet should present and show Display name field")
+
+        app.buttons["Cancel"].tap()
+        XCTAssertFalse(displayNameField.waitForExistence(timeout: 1),
+                       "Add sheet should dismiss on Cancel")
+
+        // ---- Settings gear opens Settings sheet.
+        app.buttons["Settings"].tap()
+        let settingsTitle = app.navigationBars.staticTexts["Settings"]
+        XCTAssertTrue(settingsTitle.waitForExistence(timeout: 2),
+                      "Settings sheet should present")
+        app.buttons["Done"].tap()
+
+        // ---- Search field accepts input and clears.
+        let search = app.textFields.matching(NSPredicate(format: "placeholderValue == %@", "Search connections")).firstMatch
+        XCTAssertTrue(search.waitForExistence(timeout: 2), "Search field should exist")
+        search.tap()
+        search.typeText("mini")
+        XCTAssertEqual(search.value as? String, "mini",
+                       "Search text should round-trip")
+        // Title should still be visible (top chrome does not scroll off)
+        XCTAssertTrue(title.isHittable, "Title should remain on screen during search")
+
+        // ---- Empty-state CTA routes to Add Connection.
+        let emptyCTA = app.buttons["Add a computer"]
+        if emptyCTA.waitForExistence(timeout: 1) {
+            // clear search first
+            app.buttons["Clear search"].tap()
+            emptyCTA.tap()
+            XCTAssertTrue(displayNameField.waitForExistence(timeout: 2),
+                          "Empty-state CTA should present Add Connection sheet")
+            app.buttons["Cancel"].tap()
+        }
+    }
+}