v4.30.1 — Snap framing and buffered indicators

Fixed

• snapKey framing now settles on the UI thread via an animated reaction after
  the framing SharedValues are current, instead of a layout effect that could
  let path mappers draw one frame of new data against the previous scale.
• Same-render snapKey changes include exaggeration, threshold range inputs,
  and the remaining framing settings before consuming the snap.
• Buffered/viewport-controlled badge.followViewEdge badges use the same
  recorded-tip or edge price as their dot and value line.
• A buffered line scrub hides and clears onScrub when its recorded tip moves
  left of the window, then resumes the held gesture when recorded data re-enters.

Changed

• With badge.followViewEdge on a buffered or viewport-controlled line, the
  badge, value line, and live dot stay on the latest recorded point while it is
  inside the visible time window, and only pin to the visible right-edge price
  after that point leaves.
• Plain scrub on those same buffered/viewport line charts clamps to the latest
  recorded point, so a held crosshair cannot read a synthetic price in empty
  future space as data or the viewport moves.