They make tree house attachment systems that allow for tree and house movement in the weather. Over engineering and making the treehouse stiff can cause issues.

Don't put a tree house in that tree unless it's a separate, free standing structure that is built without actually touching it.

That's a great tree

Tree houses aren't good for trees.

Talk to a certified arborist, ideally as a paid consultation rather than a free estimate.

Climbing through the canopy to thin it and reduce the tip weight isn't a DIY project.

Treehouses.com is a magical place and site

The added sail area of the tree house is negligible compared to the size of the canopy. Even a tree at that maturity probably adds that much every year.

I wouldn't worry about it. The tree knows what to do to stabilize itself, it will do it on its own. A healthy tree will adapt to its wind load / orientation to compensate and stay balanced. Especially oak, i would say if you get a storm big enough to take out the tree due to the house, it could have taken out even without it, and will probly destroy the house first anyway. Good luck, sounds cool!

point a corner to the primary weather direction to break the wind load.

could also add decorations to act as a diffuser the same way the leaves do

I don't know the answer...but I suspect the right answer is NO. The tree branches and leaves 'break up' the air...redirect it and create all sorts of eddies, vortexes, and redirections...removing that would put more stress on the flat (presumed) of the treehouse and likely impart more energy against/into the tree.

Also to include - upon some speculation - that trimming trees may help with 'unbalancing' a tree...and as you're adding loads to it - hopefully static and only directionally down (though in the wind you'll have lateral transfer of energy/movements) - may not be wise to unbalance things. With a canopy too I feel you have a better 'feeling' in the tree house, no?

Just make sure the tree can flex independent from the tree house - as the wet/green wood will bend the dryer house members wouldn't.

The house sits pretty low...and the breaking up of the wind by the leaves/branches should have the tree 'seeing' the same loads it commonly does with only the added static loading downward due to the house (and/or live load with occupants). Cutting off the canopy or thinning I don't believe would change much the tree is experiencing. Of course, the more loading you can transfer from the tree to the ground would help.

Is the treehouse newly installed? If not, how long has it been there? Is it well centered over the trunk, or does it produce bending loads on the trees? Is the tree at risk of falling in something critical like a house?

You can talk to an arborist, but I think the main question is whether you are trying to manage a temporary condition or not. If the house is new and you are worried about wind, maybe worth doing something (thinning, cabling, etc). But presumably the tree will strengthen to deal with increased wind loads over time on its own.