Unlikely on both counts. Donald Trump talked about making NATO countries pay their own way. That doesn't look like a US build-up of forces in Europe. Talk about "America First" likewise suggested that we weren't going to increase our forces overseas.
Defense spending did decline under Obama, but was that because troops and weapons were cut or because we withdrew from some conflicts? I don't know, but Hillary is more hawkish than Obama was, and she wouldn't simply continue his policies on defense and the military. Do you really see the woman who wanted to intervene in Syria increasing welfare at the expense of the military?
Therefore, given the two bad possibilities, the Russians would prefer Hillary.
The theory is that the Russians just wanted to throw the US and its alliances into chaos and electing Trump would do that. Plus, HRC supported sanctions on Russia, and the Russians may have thought they'd have a better chance with DJT. I don't think the Russians "hacked the election" or that Putin loves Trump, but the idea that they had a natural preference for Clinton doesn't hold up.
“increase our forces overseas”
The $54 billion defense spending increase Trump wants would probably augment US forces in Europe.
“Do you really see the woman who wanted to intervene in Syria increasing welfare at the expense of the military?”
Yes, even though she probably is the most militant national Democrat.
Winning elections is the number #1 priority of a top-level Democratic politician.
Votes and voters simply must be bought and paid for.
“sanctions”
I doubt the Germans shivered this winter to make the Russians sorry for the reckless action of Ukrainians.
Get in Hillary’s way and you’ll pay, dearly. The effort to trip up and impeach Trump is just payback for Bill’s impeachment.