Give a connector node an icon that is not a code icon

A device read over a proprietary protocol was showing the fallback used
for a function node. A connector's type cannot be in the built-in icon
map — that is the point of it being a connector — so they share a plug.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011LF61rxW1FG5YCD2J9YqjY

frontend/src/components/Flow/FlowNode.tsx

@@ -10,6 +10,7 @@ import {
   Globe,
   Merge,
   Play,
+  Plug,
   Radio,
   Shuffle,
   Split,
@@ -58,6 +59,7 @@ export type FlowNodeData = {
   definition: NodeDef_Input
   flow: string
   typeLabel: string
+  isPlugin?: boolean
   issueText: string
   [key: string]: unknown
 }
@@ -101,10 +103,15 @@ function PortHandles({
 }
 
 function FlowNodeComponent({ data, selected }: NodeProps) {
-  const { definition, flow, typeLabel, issueText } = data as FlowNodeData
+  const { definition, flow, typeLabel, isPlugin, issueText } =
+    data as FlowNodeData
   const live = useNodeStatus(`${flow}.${definition.id}`)
   const emits = useNodeEmits(`${flow}.${definition.id}`)
-  const Icon = NODE_ICONS[definition.type as keyof typeof NODE_ICONS] ?? Code2
+  const Icon =
+    NODE_ICONS[definition.type as keyof typeof NODE_ICONS] ??
+    // A connector's own type cannot be in the map above, and a device is
+    // not a piece of code.
+    (isPlugin ? Plug : Code2)
 
   // Whatever is wrong — it failed to load, it failed to run, or the graph
   // around it does not add up — is the same red dot with the same explanation.