1.5 year old Pinus Aristata, Too dry? Or on track?

Hello everyone,
I was hoping someone more skilled and experienced with infant Bonsais could help me with a question about my 1.5-year-old Pinus Aristata that I grew from seed. I posted on a different Bonsai forum last year when my Bonsai was 9 months old making sure she was on the right path with her growth, and anything else I could do to help in healthy growing, which someone said she was good and to put her out in the natural sun in the summer months since I live in California. Now, I am wanting to make sure she is doing alright seeing as she appears a little dry in the "trunk" and "leaves", sidenote: I do not put her outside when it is over 90 degrees here in California because it is just so hot I am worried about to much heat, so instead I keep her on our kitchen window sill. I am attaching some photos and would love to hear back from someone on what they think of how she is looking, thank you!

Sad to see this young one looking so sad.  I love Bristlecones and have 3 of the 4 species including my oldest an aristata I've had since 1994. This is its 32nd growing season.  Some questions for you?

Has this tree been outside all year long?  (Did not read your post well enough)

Does this pot have drainage holes?

How recent is this picture?

What is personal specific location and USDA zone please?

Some answers and needs for these and pines in general:

1. Except for tropical pines they need to be outdoors all year long.

2, Generally in full sun at least 3/4 of the day.

3. Roots/pots should not be allowed to get HOT and kill the roots.

4.Soil/substrate should stay damp.  Not wet/NEVER dry.

5. If still green at all spray with diluted weak fertilizer water several times a day and keep in 1/2 day sunny spot out of wind to see if life persists.  Will help all I can.

Thank you for your reply ..
-the tree has not been outside ALL year long , in the summer months however I have been putting it outside for full sun (our extreme heat here in Sacramento , CA made me fearful of scorching the tree , so I’ve brought it inside on those days)
-the picture is from the day of my posting & yes the little pot has drainage holes
-Roseville , California . Zone 9b

Look forward to hearing your response on potential advice for my Bonsai & bringing it back to a healthful appearance!

As long as any green is showing I think the suggestions I gave above should be good for now.  Bringing any pine in the house is going to be bad for the tree. Let me know if it starts to show any signs of renewed health.

You should take a trip up the Mountians and visit their home territory. The summers are hotter that the pits of Hell and the Winters will freez your urine into cubes before it hits the ground. You are probably watering it too much and babying it too much.