fix(desktop): force-redial half-open gateways after wake

apps/desktop/src/app/gateway/hooks/use-gateway-boot.test.tsx

@@ -23,6 +23,7 @@ import { useGatewayBoot } from './use-gateway-boot'
 
 type Listener = (ev: unknown) => void
 let connectionApplied: null | (() => void) = null
+let powerResume: null | (() => void) = null
 
 // Minimal WebSocket stand-in implementing only what json-rpc-gateway.connect()
 // touches: readyState, add/removeEventListener('open'|'error'|'close'), close().
@@ -122,7 +123,13 @@ function fakeDesktop() {
         connectionApplied = null
       }
     }),
-    onPowerResume: vi.fn(() => () => undefined),
+    onPowerResume: vi.fn(callback => {
+      powerResume = callback
+
+      return () => {
+        powerResume = null
+      }
+    }),
     revalidateConnection: vi.fn(async () => ({ ok: true, rebuilt: false })),
     onWindowStateChanged: vi.fn(() => () => undefined),
     touchBackend: vi.fn(async () => undefined),
@@ -168,6 +175,7 @@ beforeEach(() => {
   FakeWebSocket.mode = 'open'
   FakeWebSocket.instances = []
   connectionApplied = null
+  powerResume = null
   ;(globalThis as { WebSocket: unknown }).WebSocket = FakeWebSocket
   ;(window as { hermesDesktop?: unknown }).hermesDesktop = fakeDesktop()
   $gatewayState.set('idle')
@@ -423,6 +431,32 @@ describe('useGatewayBoot remote reconnect loop (real hook, fake socket)', () =>
     expect($gatewayState.get()).toBe('open')
   })
 
+  it('power resume force-redials a half-open primary socket that still reports OPEN', async () => {
+    const desktop = fakeDesktop()
+
+    ;(window as { hermesDesktop?: unknown }).hermesDesktop = desktop
+
+    render(<Harness />)
+    await flushAsync()
+
+    const staleSocket = FakeWebSocket.instances[0]
+
+    expect(staleSocket.readyState).toBe(FakeWebSocket.OPEN)
+    expect($gatewayState.get()).toBe('open')
+    expect(powerResume).not.toBeNull()
+
+    // macOS can discard the TCP connection during sleep without updating the
+    // renderer WebSocket object. Leave readyState OPEN and emit only resume.
+    act(() => powerResume?.())
+    await flushAsync()
+    await flushAsync()
+
+    expect(staleSocket.readyState).toBe(FakeWebSocket.CLOSED)
+    expect(desktop.revalidateConnection).toHaveBeenCalledOnce()
+    expect(FakeWebSocket.instances).toHaveLength(2)
+    expect($gatewayState.get()).toBe('open')
+  })
+
   it('FIX: a failed session-list fetch during boot is non-fatal — the app still boots', async () => {
     // The version-skew report: gateway WS connects fine, but refreshSessions()
     // rejects (e.g. older backend 404s an endpoint the fallback didn't cover,

apps/desktop/src/app/gateway/hooks/use-gateway-boot.ts

@@ -299,7 +299,7 @@ export function useGatewayBoot({
       }, delay)
     }
 
-    const reconnectNow = async () => {
+    const reconnectNow = async ({ forceOpenSocket = false }: { forceOpenSocket?: boolean } = {}) => {
       if (cancelled || !bootCompleted || $gatewaySwitching.get()) {
         return
       }
@@ -308,7 +308,17 @@ export function useGatewayBoot({
       reconnectAttempt = 0
       reconnectFailingSince = null
       escalated = false
-      reconnectSecondaryGateways()
+      reconnectSecondaryGateways({ forceOpenSockets: forceOpenSocket })
+
+      // Browser WebSocket state can remain OPEN after sleep even though the OS
+      // discarded the underlying TCP connection. Strong recovery signals must
+      // retire that half-open socket before the normal reconnect path can run.
+      if (forceOpenSocket && gatewayOpen()) {
+        gateway.close()
+        // close() publishes `closed`, which schedules the regular backoff.
+        // This path reconnects immediately, so remove that redundant timer.
+        clearReconnectTimer()
+      }
 
       if (!gatewayOpen()) {
         await attemptReconnect()
@@ -545,9 +555,10 @@ export function useGatewayBoot({
 
     // Wake signals: power resume (macOS/Windows), network coming back, and the
     // window regaining focus/visibility. Each nudges an immediate reconnect.
-    const offPowerResume = desktop.onPowerResume?.(() => void reconnectNow())
+    const forceReconnectNow = () => reconnectNow({ forceOpenSocket: true })
+    const offPowerResume = desktop.onPowerResume?.(() => void forceReconnectNow())
     const offConnectionApplied = desktop.onConnectionApplied?.(() => void softSwitch())
-    const offGatewayReconnect = registerGatewayReconnect(reconnectNow)
+    const offGatewayReconnect = registerGatewayReconnect(forceReconnectNow)
 
     // Registry lifecycle: a removed connection's secondaries must close NOW
     // (remote/cloud have no local process whose death would drop the socket —
@@ -561,7 +572,7 @@ export function useGatewayBoot({
       disposeSecondariesForConnection(payload.connectionId, { redial: payload.reason === 'updated' })
     })
 
-    const onOnline = () => void reconnectNow()
+    const onOnline = () => void forceReconnectNow()
 
     const onVisible = () => {
       if (document.visibilityState === 'visible') {

apps/desktop/src/store/gateway-connection-lifecycle.test.ts

@@ -218,6 +218,29 @@ describe('retireLocalProfileGateways', () => {
   })
 })
 
+describe('reconnectSecondaryGateways', () => {
+  it('force-redials an open secondary whose transport may be half-open after wake', async () => {
+    const getConnectionFor = vi.fn(async ({ connectionId, profile }: { connectionId: string; profile: string }) =>
+      descriptorFor(connectionId, profile)
+    )
+
+    installDesktop({ getConnectionFor })
+
+    await ensureGatewayForAgent('homelab', 'default')
+    expect(gatewayMocks.connect).toHaveBeenCalledTimes(1)
+    expect(gatewayMocks.instances[0].connectionState).toBe('open')
+
+    reconnectSecondaryGateways({ forceOpenSockets: true })
+
+    await vi.waitFor(() => {
+      expect(gatewayMocks.connect).toHaveBeenCalledTimes(2)
+    })
+    expect(gatewayMocks.instances[0].close).toHaveBeenCalledOnce()
+    expect(getConnectionFor).toHaveBeenCalledTimes(2)
+    expect(gatewayMocks.instances[0].connectionState).toBe('open')
+  })
+})
+
 describe('reconnect fail-stop on a removed connection', () => {
   it('evicts the entry instead of retrying when the registry no longer knows the id', async () => {
     const getConnectionFor = vi

apps/desktop/src/store/gateway.ts

@@ -836,13 +836,22 @@ export async function ensureActiveGatewayOpen(): Promise<HermesGateway | null> {
 // activation before reporting the gateway as unavailable.
 const ACTIVE_GATEWAY_OPEN_WAIT_MS = 8_000
 
-// Wake signal (sleep/network/visibility): nudge every live secondary back open.
-export function reconnectSecondaryGateways(): void {
+// Recovery signal: nudge every live secondary back open. Power-resume/network
+// signals can force sockets that still report open to retire before redialing.
+export function reconnectSecondaryGateways({ forceOpenSockets = false }: { forceOpenSockets?: boolean } = {}): void {
   for (const entry of g.secondaries.values()) {
-    if (!entry.wantOpen || isOpen(entry.gateway)) {
+    if (!entry.wantOpen) {
       continue
     }
 
+    if (isOpen(entry.gateway)) {
+      if (!forceOpenSockets) {
+        continue
+      }
+
+      entry.gateway.close()
+    }
+
     entry.reconnectAttempt = 0
     clearTimer(entry)
     void reconnectSecondary(entry)