v1.2.0

• Reorganized the Mappings window into a tree grouped by track, FX and parameter, with each mapping's controls laid out in resizable columns
• Added axis reassignment: switch a mapping between the X and Y axes in place, keeping its curve and settings
• Replaced selection-based removal with a per-mapping Remove button
• Compacted the curve controls: color is now a single swatch that opens the full picker, and thickness and point radius are stepper inputs
• The Mappings window now refreshes automatically when the project changes (tracks or FX added, removed or renamed) and no longer restores a stale saved window size