[Feature Request] Global setting to customize the 1RM calculation formula

[johnjohnsontick-sketch]

Hi! I've been using Liftosaur and really appreciate the app's focus on total user control and scripting. However, I noticed the default 1RM calculator is locked to RPE tables. While I understand the reasoning, it yields different numbers compared to the standard algebraic formulas I am used to for my progression tracking.

​It would be amazing to have a global setting that allows users to change the default 1RM calculation method across the entire app.

​Ideally, it could be a dropdown menu in the Settings with the following options:

​Liftosaur Default (Current RPE Tables)

​Standard Formulas (Epley, Brzycki, etc.)

​Custom (A text field where users can input their own algebraic formula using variables like W for weight and R for reps, similar to how Liftoscript handles custom logic).

​While I know I can override rm1 on a per-exercise basis using custom scripts, a global setting would make it much easier to keep historical data and progression math consistent without having to hardcode every single workout block. Thanks for all the hard work on the app!