Adjustable Trim Installation Tool for Uneven Walls

The user is trimming interior windows but states 'the wall is not straight so my 45’s aren’t lining up' for 'picture frame' trim without a stool. This is a common problem in older homes or DIY projects with imperfect walls, where standard miter cuts fail. An innovative tool or jig that helps measure, mark, and cut trim accurately for non-square angles and uneven surfaces, or a system that allows for slight adjustments/compensation during installation to achieve seamless joins despite wall imperfections, would solve a significant pain point for carpenters and DIYers.