v4.26.0 — Y-range animation and reference-line controls

[4.26.0] — 2026-10-03

Added

• Working orders demo presets for orders and alerts above/below the chart, plus
  a plain alert toggle to check off-axis grouping counts.
• Working orders demo controls for tag-only grabbing versus whole-line grabbing,
  time scrolling, candles, pausing the feed, and resetting orders, with an
  interaction log for manual QA.
• ReferenceLine.grabRange ([from, to], canvas px): where along a draggable
  line a press may grab it, typically the span of a custom tag. A pan, scrub or
  page scroll that merely starts near the line no longer moves it; inside the
  range a press grabs it as before. Omitted, a line is grabbed anywhere along
  it, as today.
• Shared rangeAnimation config on LiveChart and LiveChartSeries, with
  opt-in animated expansion and independent expansion/contraction smoothing.
  Range easing no longer requires changing live-value or time-window smoothing
  to implement a faster return after releasing a held reference line (#351).

Fixed

• With referenceLineGrouping, badged lines far above the visible range now
  group at the top edge like lines below it do, instead of drawing their pinned
  badges on top of each other.
• Hidden off-axis lines without a badge no longer inflate reference-line group
  counts at either edge.
• Scrubbing a draggable reference line with grabRange uses the touch-down
  point to decide ownership. Starting outside the range and moving into it
  before scrub activation now starts a scrub instead of losing the gesture.
• Draggable reference lines above the visible range remain grabbable at the
  top edge, including when their projected Y is negative.
• Independent Y-range easing keeps bounds ordered on initial fits and disjoint
  data changes, including slow or frozen expansion.