v0.9.3

Canvas interaction and accessibility fixes from downstream testing.

Fixed

• usePanZoom (GraphCanvas, MapCanvas) — wheel or pinch zoom right after a drag-pan now
  zooms around the cursor (#306). The pan inertia glide kept writing its own
  pan every frame and overwrote the zoom's cursor-anchored pan, so the zoom pivoted around an
  unrelated point. Wheel, keyboard, zoomTo, panTo and reset now stop the glide, and wheel
  events that arrive within one frame compound instead of all but the last being dropped.
• usePanZoom (GraphCanvas, MapCanvas) — +/- keyboard zoom now scales about the
  view centre instead of the top-left corner (#302). Each press now
  multiplies or divides the zoom by 1.2 instead of adding or subtracting 0.1, so it is the same
  relative step at any zoom.
• GraphCanvas — fitView and the toolbar's zoom-to-fit now frame cluster boundary circles
  (showClusterBoundaries) and radial-tree hierarchy rings (showHierarchyRings), not just the
  nodes (#305). Radial-tree trunk boundaries were clipped by up to ~176px
  after fit, and force-clustered bubbles slightly. The initial fit also waits for the current
  layout's positions and boundaries, so it never frames a previous layout's.
• GraphCanvas — interactive edges and nodePopover / edgePopover dialogs get their
  accessible names from node labels instead of ids, so screen readers no longer announce opaque
  ids such as UUIDs (#304). An edge is announced as "monitors: WebSocket
  Disconnect Alert to Connection State Gauge", a popover as "Details for " or
  "Details for ". Each name falls back to the id when a node has no label.

Added

• GraphEdge — optional sourceLabel / targetLabel props for the interactive edge's
  accessible name, falling back to sourceId / targetId. GraphCanvas passes them
  automatically; pass them yourself when rendering GraphEdge standalone with opaque ids.