fix(agent): align consumers with inbox lifecycle

apps/web/tests/snapshots/queue-actions/layout.expected.md

@@ -16,10 +16,6 @@
   - img
   - img
   - text: Context injection
-- button "Context injection":
-  - img
-  - img
-  - text: Context injection
 - paragraph: partial
 - status: Deep diving...
 - region "To-dos":

apps/web/tests/snapshots/queue-actions/preserved.expected.md

@@ -19,21 +19,24 @@
   - img
 - button "Branch into a new conversation":
   - img
-- text: {{clock}} Edited queue item {{clock}}
-- button "Copy":
-  - img
-- button "Branch into a new conversation":
-  - img
-- paragraph: partial
-- status: Deep diving...
+- text: {{clock}}
+- button "2 queued messages" [expanded]
 - list:
+  - listitem:
+    - text: Edited queue item
+    - button "Edit queued message":
+      - img
+    - button "Remove queued message":
+      - img
+    - button "Steer queued message" [disabled]:
+      - img
   - listitem:
     - text: Queue item preserved after stop
     - button "Edit queued message":
       - img
     - button "Remove queued message":
       - img
-    - button "Steer queued message":
+    - button "Steer queued message" [disabled]:
       - img
 - textbox "Message the agent"
 - button "Commands":
@@ -42,5 +45,5 @@
 - button "Select model, current DeepSeek-V4-Flash":
   - text: DeepSeek-V4-Flash
   - img
-- button "Stop generating"
+- button "Send message" [disabled]
 - text: 1 turns · 1 steps Input 0 tok · Output 0 tok