fix(nodes): connected nodes points to new boards on the bus instead of saying none are reported

src/main/nodes/cockpit-snapshot/connection-summary.test.ts

@@ -200,3 +200,23 @@ describe('nodesSummary rows', () => {
     expect([s.rows, s.more, s.footer]).toEqual([[], 0, 'healthy nodes hidden'])
   })
 })
+
+describe('nodesSummary with no board of your cockpit (#160)', () => {
+  const panelNew = (nodeId: number) => node(nodeId, { source: 'new', identified: 'panel' })
+
+  it('points to the new boards on the bus — the Overview notice’s count — and where to add them', () => {
+    const one = summary([panelNew(41)])
+    expect([one.known, one.newCount]).toEqual([0, 1])
+    expect(one.empty).toBe('1 new board on the bus — add it from the Cockpit.')
+    const two = summary([panelNew(41), pdu(42, 'Left', { source: 'new', identified: 'pdu' })])
+    expect(two.newCount).toBe(2)
+    expect(two.empty).toBe('2 new boards on the bus — add them from the Cockpit.')
+  })
+
+  it('says the bus reports nothing only when it does: none on it, or none identified yet', () => {
+    expect(summary([]).empty).toBe('No nodes reported. Power on a PanelGroup.')
+    // Still identifying: not news yet (isReportableNew), so not counted.
+    const s = summary([node(41, { source: 'new' })])
+    expect([s.newCount, s.empty]).toEqual([0, 'No nodes reported. Power on a PanelGroup.'])
+  })
+})

src/main/nodes/cockpit-snapshot/summaries.ts

@@ -7,11 +7,14 @@
 // adopted (node-model.ts newState), each one a board up and a warning, and an Attention item.
 // What is on the bus is one rule (node-model.ts onBusNow, X2): while the link is down the tile says
 // "no live node status", and the banner, the notice and Connected nodes say nothing.
+// With none of your cockpit's boards to count, Connected nodes points to the new ones on the bus
+// (#160): the same count as the Overview's notice and the Cockpit's "New on the bus".
 // A Connected nodes row names its board's resolved power zone (D7, the same one the Cockpit reads):
 // `PDU_Right`, `PDU_Right (hidden)`, else "no power zone".
 import { hhmmss, lastSeenLabel, plural } from '@shared/format'
 import {
   COCKPIT_IDLE,
+  NO_NODES,
   type AttentionItem,
   type AttentionSummary,
   type CockpitTile,
@@ -139,6 +142,16 @@ export function overviewSummary(
 
 // ── Connection › Connected nodes ────────────────────────────────────────────
 
+/**
+ * The card's line with no board of your cockpit to count: the new boards on the bus and where to
+ * add them (#160) — `1 new board on the bus — add it from the Cockpit.` — else that the bus
+ * reports nothing.
+ */
+function emptyLine(newCount: number): string {
+  if (newCount === 0) return NO_NODES
+  return `${plural(newCount, 'new board')} on the bus — add ${newCount === 1 ? 'it' : 'them'} from the Cockpit.`
+}
+
 /**
  * Connected nodes: the counts and the rows that need attention, the Cockpit's strays included (X3:
  * each one a board up and a warning, with its Attention row). Quiet while the link is down — it
@@ -157,6 +170,8 @@ export function nodesSummary(
   const byId = new Map(views.map((v) => [v.entry.nodeId, v.entry]))
   const items = attentionItems(views, outages, strays)
   const healthy = band.online - band.warn
+  // The Overview's notice's count (the Cockpit's "New on the bus · N"): one rule, isReportableNew.
+  const newCount = newDevices(views, live)?.count ?? 0
 
   const rows = items.slice(0, ATTENTION_SHOWN).map((i): SummaryRow => {
     const e = byId.get(i.nodeId)!
@@ -202,6 +217,8 @@ export function nodesSummary(
     watts: band.watts,
     rows,
     more,
-    footer
+    footer,
+    newCount,
+    empty: emptyLine(newCount)
   }
 }

src/renderer/src/nodes/NodesCard.tsx

@@ -25,7 +25,7 @@ export function NodesCard({ autoConnect }: { autoConnect: boolean }) {
       {!linkUp ? (
         <div className="hint">{deviceView(deviceState, { autoConnect }).nodesHint}</div>
       ) : sum.known === 0 ? (
-        <div className="hint">No nodes reported. Power on a PanelGroup.</div>
+        <div className="hint">{sum.empty}</div>
       ) : (
         <>
           <div className="nsum">

src/renderer/test/t5-connection-nodes-card.test.tsx

@@ -114,6 +114,26 @@ describe('T5 Connection › nodes summary card (B63, B14, B37, X2)', () => {
     expect(rowButtons()).toEqual([])
   })
 
+  it('with none of your cockpit’s boards, it points to the new ones on the bus (#160)', async () => {
+    const T0 = Date.UTC(2026, 9, 16, 12, 0, 0)
+    const fresh = (n: number) => newBoard(n, T0, { identified: 'panel' })
+    const { sky } = await renderScenario(<Connection />, { device: connected(), model: model([]) })
+    expect(screen.getByText('No nodes reported. Power on a PanelGroup.')).toBeInTheDocument()
+    sky.emitScenario({ model: model([fresh(1)]) })
+    expect(
+      screen.getByText('1 new board on the bus — add it from the Cockpit.')
+    ).toBeInTheDocument()
+    expect(screen.queryByText('No nodes reported. Power on a PanelGroup.')).toBeNull()
+    sky.emitScenario({ model: model([fresh(1), fresh(2)]) })
+    expect(
+      screen.getByText('2 new boards on the bus — add them from the Cockpit.')
+    ).toBeInTheDocument()
+    // Added to your cockpit: the normal card again.
+    sky.emitScenario({ model: model([panel(1, 'Center_Armament')]) })
+    expect(count('healthy')).toBe('1healthy')
+    expect(screen.queryByText(/new boards? on the bus/)).toBeNull()
+  })
+
   it('"›" opens the Cockpit on that board', async () => {
     const { user } = await renderScenario(<App />, { device: connected(), model: scene() })
     await user.click(screen.getByRole('tab', { name: 'Connection' }))

src/shared/nodes/ipc.ts

@@ -787,6 +787,16 @@ export interface NodesSummary {
   more: number
   /** `+5 more · healthy nodes hidden`; empty when there is nothing to say. */
   footer: string
+  /**
+   * New boards on the bus that can be added: the Overview's new-devices count (the Cockpit's "New
+   * on the bus · N"), not part of `known`.
+   */
+  newCount: number
+  /**
+   * The card's line when `known` is 0: where to add the new boards on the bus (#160), else that
+   * the bus reports nothing.
+   */
+  empty: string
 }
 
 /** A registry row's "On the bus" column. */
@@ -848,6 +858,9 @@ export interface CockpitSnapshot {
   settings: SettingsNodes
 }
 
+/** Connected nodes' line while the bus reports nothing at all (NodesSummary `empty`). */
+export const NO_NODES = 'No nodes reported. Power on a PanelGroup.'
+
 /** What the Cockpit shows before main's first snapshot: no model, link down. */
 export const COCKPIT_IDLE: CockpitSnapshot = {
   rev: 0,
@@ -899,7 +912,9 @@ export const COCKPIT_IDLE: CockpitSnapshot = {
     watts: null,
     rows: [],
     more: 0,
-    footer: ''
+    footer: '',
+    newCount: 0,
+    empty: NO_NODES
   },
   settings: { differing: 0, canReset: false, hidden: [], registry: { summary: '', rows: [] } }
 }