fix(tests): repair three pre-existing gateway test failures

- test_background_autocompletes: pytest.importorskip("prompt_toolkit")
  so the test skips gracefully where the CLI dep is absent

- test_run_agent_progress_stays_in_originating_topic: update stale emoji
  💻 → ⚙️ to match get_tool_emoji("terminal", default="⚙️") in run.py

- test_internal_event_bypass{_authorization,_pairing}: mock
  _handle_message_with_agent to raise immediately; avoids the 300s
  run_in_executor hang that caused the tests to time out

tests/gateway/test_background_command.py

@@ -308,6 +308,7 @@ class TestBackgroundInCLICommands:
 
     def test_background_autocompletes(self):
         """The /background command appears in autocomplete results."""
+        pytest.importorskip("prompt_toolkit")
         from hermes_cli.commands import SlashCommandCompleter
         from prompt_toolkit.document import Document
 

tests/gateway/test_internal_event_bypass_pairing.py

@@ -128,12 +128,16 @@ async def test_internal_event_bypasses_authorization(monkeypatch, tmp_path):
 
     monkeypatch.setattr(GatewayRunner, "_is_user_authorized", tracking_auth)
 
-    # _handle_message will proceed past auth check and eventually fail on
-    # downstream logic. We just need to verify auth is skipped.
+    # Stop execution before the agent runner so the test doesn't block in
+    # run_in_executor.  Auth check happens before _handle_message_with_agent.
+    async def _raise(*_a, **_kw):
+        raise RuntimeError("sentinel — stop here")
+    monkeypatch.setattr(GatewayRunner, "_handle_message_with_agent", _raise)
+
     try:
         await runner._handle_message(event)
-    except Exception:
-        pass  # Expected — downstream code needs more setup
+    except RuntimeError:
+        pass  # Expected sentinel
 
     assert not auth_called, (
         "_is_user_authorized should NOT be called for internal events"
@@ -175,10 +179,16 @@ async def test_internal_event_does_not_trigger_pairing(monkeypatch, tmp_path):
 
     runner.pairing_store.generate_code = tracking_generate
 
+    # Stop execution before the agent runner so the test doesn't block in
+    # run_in_executor.  Pairing check happens before _handle_message_with_agent.
+    async def _raise(*_a, **_kw):
+        raise RuntimeError("sentinel — stop here")
+    monkeypatch.setattr(GatewayRunner, "_handle_message_with_agent", _raise)
+
     try:
         await runner._handle_message(event)
-    except Exception:
-        pass  # Expected — downstream code needs more setup
+    except RuntimeError:
+        pass  # Expected sentinel
 
     assert not generate_called, (
         "Pairing code should NOT be generated for internal events"

tests/gateway/test_run_progress_topics.py

@@ -144,7 +144,7 @@ async def test_run_agent_progress_stays_in_originating_topic(monkeypatch, tmp_pa
     assert adapter.sent == [
         {
             "chat_id": "-1001",
-            "content": '💻 terminal: "pwd"',
+            "content": '⚙️ terminal: "pwd"',
             "reply_to": None,
             "metadata": {"thread_id": "17585"},
         }