fix(desktop): clear consumed steering queue cards

apps/desktop/src/main/__tests__/message-queue-ui-state.test.ts

@@ -109,6 +109,16 @@ test('queue_update events drive the independent desktop queue projection', () =>
     content: { text: 'adjust this run' },
   });
   assert.deepEqual(removedTransientMessageIds, ['message-steer']);
+  assert.deepEqual(controller.getState().messageQueueBySession['session-1'], {
+    queueRevision: 3,
+    entries: [{
+      entryId: 'entry-next',
+      messageId: 'message-next',
+      content: { text: 'do this next' },
+      placement: 'next_turn',
+      state: 'queued',
+    }],
+  });
 
   handlers.handleEvent('session-1', {
     type: 'queue_update',
@@ -148,6 +158,52 @@ test('queue_update events drive the independent desktop queue projection', () =>
   assert.deepEqual(removedTransientMessageIds, ['message-steer', 'message-next']);
 });
 
+test('steering delivery clears a promoted follow-up from the desktop queue', () => {
+  const controller = createAppShellSessionUiStateController();
+  const handlers = createAppShellSessionEventHandlers({
+    uiLocale: 'en',
+    activeIdRef: { current: 'session-1' },
+    liveTurnBySessionRef: controller.liveTurnBySessionRef,
+    refreshMessages: async () => true,
+    refreshSessions: async () => [],
+    setLiveTurnBySession: controller.setLiveTurnBySession,
+    setInteractionBySession: controller.setInteractionBySession,
+    setMessageQueueBySession: controller.setMessageQueueBySession,
+    showModelSetupToast() {},
+    toastApi: { error() {} },
+  });
+
+  handlers.handleEvent('session-1', {
+    type: 'queue_update',
+    id: 'queue-followup',
+    turnId: 'turn-1',
+    ts: 1,
+    queueRevision: 1,
+    steering: [],
+    followup: ['adjust this run'],
+    steeringEntries: [],
+    followupEntries: [{
+      entryId: 'entry-followup',
+      messageId: 'message-followup',
+      content: { text: 'adjust this run' },
+      placement: 'next_turn',
+      state: 'queued',
+    }],
+  });
+  assert.equal(controller.getState().messageQueueBySession['session-1']?.entries.length, 1);
+
+  handlers.handleEvent('session-1', {
+    type: 'steering_message',
+    id: 'steering-message-followup',
+    turnId: 'turn-1',
+    messageId: 'message-followup',
+    ts: 2,
+    content: { text: 'adjust this run' },
+  });
+
+  assert.equal(controller.getState().messageQueueBySession['session-1'], undefined);
+});
+
 test('complete events deliver the durable context compaction outcome to Desktop', () => {
   const controller = createAppShellSessionUiStateController();
   const outcomes: unknown[] = [];

apps/desktop/src/renderer/app-shell-session-events.ts

@@ -367,9 +367,21 @@ export function createAppShellSessionEventHandlers(options: {
         break;
       case 'steering_message':
         // The live Turn projection now renders this same messageId in place.
-        // Retire only the renderer-owned tail row; a later nack queue_update
-        // will project it again if the Host returns the message to the queue.
+        // Retire the renderer-owned tail row and its pending-queue card; a
+        // later nack queue_update will project both again if the Host returns
+        // the message to the queue.
         removeTransientMessage?.(sessionId, event.messageId);
+        setMessageQueueBySession?.((current) => {
+          const queue = current[sessionId];
+          if (!queue?.entries.some((entry) => entry.messageId === event.messageId)) return current;
+          const entries = queue.entries.filter((entry) => entry.messageId !== event.messageId);
+          if (entries.length > 0) {
+            return { ...current, [sessionId]: { ...queue, entries } };
+          }
+          const next = { ...current };
+          delete next[sessionId];
+          return next;
+        });
         break;
       case 'text_complete':
         void refreshMessages(sessionId, { requiredAssistantMessageId: event.messageId }).catch(() => false);