Brummel
08a272c73d
The hand-rolled wheel-zoom + drag-pan (wheelZoomPlugin) was hakelig/glitchy — uPlot is not built to be driven that way. Remove the plugin and the cursor.drag override so uPlot's own defaults govern the mouse: drag = box-zoom on x, double-click = reset to full range, with the legend value-readout and crosshair unchanged. Everything else from the Tier-1 pass stays: the ordinal (gap-collapsed) x-axis default + continuous toggle, the ordinal-label honesty (ticks/legend report the real xs[i]), and panel cursor-sync (cursor.sync key retained; only the drag override and the plugin are dropped). The x-mode guard is flipped to pin the revert — overlay carries no custom plugin and no cursor.drag override, panels carry no plugin — and stays green alongside the other three chart guards. refs #103