I have a possible feature request. When you search a deck ([deck name] -> All Cards), I believe it would be best if it prioritized cards with the searched value within the main value of the card. As it is, it appears to search all values, and then gives anything which contained what you searched as a value in index order. For example, I was searching the 涼宮ハルヒの憂鬱 deck to see whether 「宇宙人」 was already in the deck or not, but ended up having to search for 宇宙, loading all the cards, and then using ctrl+f for 「宇宙人」 in order to check manually.
As always, thanks