Function PluginNode

Renders one plugin node on the canvas.

Handle layout encodes the port model (see ../nodeKinds for the shared entry/terminal classification and output resolution):

• in (left, target) — omitted on entry-like nodes (listener, input).
• Outputs (right, source) — omitted on terminal-like nodes (client, output, error, none of which get a success output either); a single success handle on entry-like nodes (listener reads its own catalog spec, which happens to be exactly one success port; the non-catalog input pseudo-node uses a hard-coded fallback of the same shape); otherwise one handle per port declared in data.ports.outputs (falling back to the default success+error pair when the type has no catalog entry), colored by PortDecl.kind. When data.showPortNames is not false (the default), each port renders as a labeled row inside the node body, with its handle centered on the row; otherwise handles fall back to the previous evenly-spaced absolute placement with only a hover tooltip.

Clicking the node invokes data.onSelect(id); selection is shown with an accent border and ring.