H.R.
My first child was the same way. I always said, I'd rather have her sleep through the night. Good work!
I think it was at about 6 months that the naps consolidated to three...nighttime was 7pm-7am, nap 9:00-10:30, nap 1-2, sometimes nap 4-4:45 then bedtime again. I was wondering if she's doing all these 45 minute naps in her crib? Are they in the car as you go places or in her swing? I might suggest trying to get her to sleep longer by doing a naptime routine...sort of like at bedtime. I used to put her in her sleep sack, then read a few books, then put her down saying the same phrase..."nigh-night sweet Sara, sleep tight...Mommy and Daddy love you" then down in the crib. At bedtime, the only difference included bath, pjs, breast/bottle first. I found routines very helpful for both my children in order to expect what to do next. Both of my kids have always been great sleepers at night...which you have too...so be extremely grateful for that! Good luck.