PlasmaZones 1.8.4

Added

• Shader preset load/save in editor ShaderSettingsDialog
• Preview shader effects in zone editor (#132)
• Restore window size immediately when dragging between zones (#133)

Fixed

• Overlay follows cursor when dragging to another monitor (#136)
• Defer window resize until drag release. Keep restore-to-float on unsnap
• Hide shader preview overlay when dialogs open or app loses focus
• PR review feedback for shader preview

Removed

• Dead zoneGeometryDuringDrag slot