No, it didn't. Enterprise had a refit. OK, but that doesn't explain how every aspect of Starfleet's aesthetic and technology is totally different to TOS, only 3 years on. So is nearly everything about the Klingons apart from the shape of their ships, not just the make-up. They even have their own language we've never heard before. We can come up with all sorts of fanon to explain it, but on screen it was just there. It doesn't matter - TMP is a different production made significantly later, it should be updated. They made a movie for the seventies, and an expensive one at that. Not a TV show for the sixties. But the only way they 'fit together' is that we all just accept that they do, or make up our own explanations. Trek fans have had to do this for years, like reconciling the Borg of First Contact with the Borg of the series, but our ability seems to switch off when we don't want to do it.