v0.3.1

Added

Four new dependency-free effect constructors:

• cursor_implode — an inverse pulse that homes in on the cursor: a wide, faint floating box that contracts and solidifies onto the cursor position. The reverse of cursor_beacon.
• cursor_ripple — an expanding pulse that grows outward from the cursor while fading (a dissipating ring); the outward twin of cursor_implode.
• column_sweep — a highlighted band that scans left→right across a line, then clears.
• breathe — swells a line's background toward a color and recedes back, a soft in-and-out glow; falls back to a plain flash when the highlight group has no background.

All reuse the existing shared scratch-buffer / managed-timer / blend machinery, so nothing new leaks on exit.

Full changelog: v0.3.0...v0.3.1