An audio-style waveform rendered as columns of ASCII density glyphs with a draggable playhead: dragging (or hovering, or holding keyboard focus) subdivides the glyph columns nearest the cursor into finer sub-columns that re-ink the region at higher resolution, while the rest of the strip stays coarse.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/waveform-ascii-scrub.json"