Where can I claim for Alberta climate leadership adjustment rebate? I can't see it from tax summary.

You will not see it reflected on your tax return, the province calculates it based on your income level and payments are made in July, October, January, and April separately from the GST/HST credit payments.

How about gst/hst credit? Where can I see it?

Once the CRA has received and processed tax return;  gst/hst amount (if any), along with your NOA, will be notified in your "MyCRA" account.