test(live_gui): adapt test_user_request_* to new send_result() flow

The 2 tests in test_live_gui_integration_v2.py were mocking the old
ai_client.send() and asserting on the old error format. The FR1 fix
migrated _handle_request_event to ai_client.send_result() and routes
errors via ErrorInfo.ui_message() instead of f'ERROR: {e}'.

Updated:
- test_user_request_integration_flow: mock send_result instead of send
- test_user_request_error_handling: mock send_result returning an error
  Result; assert new error format (just the message, no 'ERROR:' prefix)

Per AGENTS.md 'do not skip tests just because they fail' -- adapted
the tests to test the new (correct) behavior, not skipped or simplified.

tests/test_live_gui_integration_v2.py

@@ -9,6 +9,7 @@ import time
 from src.gui_2 import App
 from src.events import UserRequestEvent
 from src.api_hook_client import ApiHookClient
+from src.result_types import Result, ErrorInfo, ErrorKind
 
 @pytest.mark.timeout(10)
 def test_user_request_integration_flow(mock_app: App) -> None:
@@ -25,7 +26,7 @@ def test_user_request_integration_flow(mock_app: App) -> None:
  # Mock all ai_client methods called during _handle_request_event
  mock_response = "This is a test AI response"
  with (
-  patch('src.ai_client.send', return_value=mock_response) as mock_send,
+  patch('src.ai_client.send_result', return_value=Result(data=mock_response)) as mock_send,
   patch('src.ai_client.set_custom_system_prompt'),
   patch('src.ai_client.set_model_params'),
   patch('src.ai_client.set_agent_tools'),
@@ -51,8 +52,8 @@ def test_user_request_integration_flow(mock_app: App) -> None:
   # Let's call the handler
   app.controller._handle_request_event(event)
   
-  # 3. Verify ai_client.send was called
-  assert mock_send.called, "ai_client.send was not called"
+  # 3. Verify ai_client.send_result was called
+  assert mock_send.called, "ai_client.send_result was not called"
   
   # 4. First event should be 'comms' (request logging)
   event_name, payload = app.controller.event_queue.get()
@@ -82,8 +83,9 @@ def test_user_request_error_handling(mock_app: App) -> None:
       Verifies that if ai_client.send raises an exception, the UI is updated with the error state.
  """
  app = mock_app
+ err = ErrorInfo(kind=ErrorKind.NETWORK, message="API Failure", source="ai_client.test")
  with (
-  patch('src.ai_client.send', side_effect=Exception("API Failure")),
+  patch('src.ai_client.send_result', return_value=Result(data="", errors=[err])),
   patch('src.ai_client.set_custom_system_prompt'),
   patch('src.ai_client.set_model_params'),
   patch('src.ai_client.set_agent_tools'),
@@ -118,7 +120,7 @@ def test_user_request_error_handling(mock_app: App) -> None:
   
   app.controller._process_pending_gui_tasks()
   assert app.controller.ai_status == "error"
-  assert "ERROR: API Failure" in app.controller.ai_response
+  assert "API Failure" in app.controller.ai_response
 
 def test_api_gui_state_live(live_gui) -> None:
  client = ApiHookClient()