PlasmaZones 1.15.4

Fixed

• Overlapping zone multi-zone cascade: Placing cursor on a zone fully inside a larger zone no longer highlights all zones. Fixed detectMultiZone to separate overlapping zones (cursor inside) from edge-adjacent zones (cursor near edge). Only edge-adjacent zones trigger multi-zone snap. Replaced bounding-rect expansion with edge-adjacency flood-fill that skips zones spatially overlapping the seed. Removed duplicated smallest-area loop in paint-to-span.
• Edge tolerance now respects settings: Zone-to-zone edge detection uses the user’s adjacentThreshold setting instead of a hardcoded 5px value, so manually-gapped layouts work correctly with the configured proximity.