Fix remaining test compilation issues

- Add attachedViaVT parameter to test initializations
- Remove unnecessary nil coalescing operators for non-optional name property

mac/VibeTunnel/Core/Services/SessionMonitor.swift

@@ -169,7 +169,7 @@ final class SessionMonitor {
                 for session in ended {
                     let id = session.id
                     let title = "Session Completed"
-                    let displayName = session.name ?? session.command.joined(separator: " ")
+                    let displayName = session.name
                     let content = UNMutableNotificationContent()
                     content.title = title
                     content.body = displayName

mac/VibeTunnelTests/SessionMonitorTests.swift

@@ -44,7 +44,8 @@ final class SessionMonitorTests {
             source: nil,
             remoteId: nil,
             remoteName: nil,
-            remoteUrl: nil
+            remoteUrl: nil,
+            attachedViaVT: nil
         )
         let exited = ServerSessionInfo(
             id: "one",
@@ -72,7 +73,8 @@ final class SessionMonitorTests {
             source: nil,
             remoteId: nil,
             remoteName: nil,
-            remoteUrl: nil
+            remoteUrl: nil,
+            attachedViaVT: nil
         )
         let oldMap = ["one": running]
         let newMap = ["one": exited]