GYR-OS V15.1

Authors: Tim Tesner & Gemini 3 Pro

V15.1 Hotfix Upgrades:
- Master Volume Bug Fix: Resolved the Dat.GUI slider error pointing to an undefined variable, restoring full Master Output control.
- Click vs Drag Restored: Buttons on the HUD now intelligently differentiate between a normal click (which fires their action) and a drag (which clones them).
- Ultimate Pad Control: Custom Pads natively support deep sub-menus. Click the ⚙ icon on a pad in Edit mode to reveal Layering, Retrigger, Looping options, EQs, and File Info!
- P1-P20 Deep Saves: Saving a master preset now captures absolutely everything: synth parameters, cloned playfield buttons, custom audio pads, exact GUI window locations, and visual themes.