Fix test compilation and runtime issues from PR review feedback

[Copilot]

• Resolve merge conflicts between this branch and base branch (add-backend-tests-16104220138383017423)
  • SessionControllerTest.kt: use org.mockito.kotlin.mock with mock<T>() syntax (consistent with base branch)
  • GlobalWebSocketHandlerTest.kt: use mutableMapOf(...) as Map<String, Any> cast pattern and whenever(...).then { } for sendMessage (consistent with base branch)

---

🔒 GitHub Advanced Security automatically protects Copilot coding agent pull requests. You can protect all pull requests by enabling Advanced Security for your repositories. Learn more about Advanced Security.

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• jitpack.io
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED -XX:MaxMetaspaceSize=384m -XX:+HeapDumpOnOutOfMemoryError -Xms256m -Xmx512m -Dfile.encoding=UTF-8 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[RobotHanzo]

@copilot resolve merge conflicts

[Copilot]

@copilot resolve merge conflicts

Resolved in commit ce4ddd9. The base branch had a commit (ce996d8) that fixed the same review issues with slightly different approaches — aligned this branch to match exactly, resolving the conflicts in SessionControllerTest.kt (now uses org.mockito.kotlin.mock<T>()) and GlobalWebSocketHandlerTest.kt (now uses mutableMapOf(...) as Map<String, Any> cast and whenever(...).then { } for sendMessage).