Close moves of a few dB were hard to set and to see on a curve that always spans -24 to +24 dB. The wheel on free space now zooms the dB the curve shows, and the node's small curve shows the same range. - The range is one of ±3, ±6, ±12, ±24 and ±48 dB, always the same either side of 0. Up zooms in. - It is saved on the node as `range`, so it is back after loading. Like the game scale (#226) it is no undo step. EditorState gets `setNodeView` for such a setting of a node. - The lines across the curve follow the range: every 1, 2, 3, 6 or 12 dB. A handle whose gain lies beyond the range stays on the edge, in sight and in reach. - The wheel over a handle still turns the band's Q. It no longer does so anywhere while a band is picked: after opening, a band nearly always is, and the zoom would be out of reach. - `EqArea` carries the range, so the tab and the node map dB alike. The spectrum keeps its own scale. Tests: - Unit parametric-eq: 16 green, 5 new (range in compile and save, node picture, wheel steps, grid lines, handle on the edge) - Counter-check: the node's picture without the saved range turns the new picture test red - e2e 34 (melektaus-atx): ALL PASSED, 99 checks, 1 new - Gate (melektaus-atx): CHECK EXIT 0, 275 files, 4252 tests Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>