v4.28.2 — Faster multi-series mounting

[4.28.2] — 2026-10-11

Performance

• Backport the LiveChartSeries mount improvements to the 4.x renderer. Fit the
  first measured, visible data immediately, including with animated expansion
  or an initially empty feed; subsequent updates retain configured easing.
  Initialize compact layout/legend metadata on the first render, avoid seventeen
  derived-value mappers for fixed engine props, and mount particles only while
  degen is enabled. The demo initializes its feed before the first commit and
  defers its controls. No public props or exports are added.