Was the Texas Appellate Court's Conclusion that State and amount to i"any error in the admission of Detective Vogel's opinion to truthfulness" harmless in light of Appellant's Federal legal precedent?

Did a comment in the State's closing a comment on Appellant's decision to not testify?

Whether the Texas Appellate Court erred in admitting Detective Vogel's opinion testimony regarding truthfulness and in finding any such error harmless, and whether the State's closing argument comment on Appellant's decision not to testify violated Appellant's Fifth Amendment rights