Separate the window sentence from the wrapped error so a bad certificate file is not reported as a key mismatch.

Co-authored-by: Cursor <cursoragent@cursor.com>

station/session_test.go

@@ -21,7 +21,10 @@ func TestLoginAnnouncesProtocolAndJoinsTheTalkGroup(t *testing.T) {
 	}
 	ctx, cancel := context.WithCancel(t.Context())
 	defer cancel()
-	go func() { _ = st.Run(ctx) }()
+	go func() {
+		// Run's error is observed through State, which is the station seam.
+		_ = st.Run(ctx)
+	}()
 
 	got, err := st.Wait(ctx, func(s station.State) bool { return s.Connection == "Connecting" })
 	if err != nil {