The biggest issue in this regard is that insulin sensitivity will decrease when taking insulin. This causes the body to have more tendency to gain fat.
However, if you burn more than you take in, fat won't be gained. Sufficient physical work with diet staying within what you're burning can allow even losing fat while using insulin. Though that's not the best way to lose fat.
Your 7 IU pre-workout on training days value is moderate and shouldn't be too much of an issue regarding the above, though there will be some effect.
Your diet sure doesn't look like something that would put on noticeable fat in 4 days, if ever. I'd think you'd be fine for fat loss with that diet if your overall physical work is reasonable.
I would change your around-workout carb timing though.
Muscle uptake of nutrients is never better than while you're working out. Why not use it as a time to get positive balance into the muscles rather than fail to meet what's being burned?
Yet routinely someone takes for example 360 calories (60 g carbs, 30 g protein) for a workout that burns more than that.
Post workout, not as valuable as immediately pre and during workout.
I'd aim for focusing low-osmolality carb and hydrolyzed protein intake to pre and during workout nutrition rather than having half of it afterwards. And 100 g total carbs for that is plenty, not that 120 is hugely greater than that, but 100 total could well be enough.
I didn't add calories but if anything this overall plan seems low, even where wanting to hold fat the same or even to cut slightly. Did you figure a total? Also total fat seems very low, though that would depend on the particular steaks -- this can be gotten away with on a steroid cycle, but would be a problem natural.
I didn't understand your Humalog timing exactly but so long as you have your protein and carb intake after it, or shortly before, it's fine.