Fix UI test by using accessible name instead of obfuscated class

The UI test was failing because it relied on an obfuscated class name 'W'
to locate the activation code text field. The class name changed to 'Y' in
a recent version of JetBrains Rider, causing the test to fail with
NoSuchElementException.

This change uses the stable 'accessiblename' attribute instead, which:
- Is more stable across UI updates
- Is semantically meaningful and self-documenting
- Follows accessibility best practices

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: 2 people

tests/ui-rd-tests/src/test/kotlin/ManageLicensesFrame.kt

@@ -26,8 +26,8 @@ class ManageLicensesFrame(remoteRobot: RemoteRobot, remoteComponent: RemoteCompo
 
   fun enableFreeTier() {
     radioButton("Activation code").click()
-    /// Note: The license code is obfuscated, so we use the class `W`. But a better solution is required.
-    textFields(byXpath("//div[@class='W']")).first().text = System.getenv("RIDER_LICENSE")
+    // Use accessible name instead of obfuscated class name for better stability
+    textFields(byXpath("//div[@accessiblename='Activation code']")).first().text = System.getenv("RIDER_LICENSE")
     button("Activate").click()
     button(JButtonFixture.byText("Close"), timeout = Duration.ofSeconds(20)).click()
   }