chore(tech-debt): Finalize gui_2.py cleanup and test suite discipline

tests/test_live_gui_integration.py

@@ -1,4 +1,3 @@
-from typing import Generator
 import pytest
 from unittest.mock import patch, ANY
 import asyncio
@@ -6,32 +5,6 @@ import time
 from gui_2 import App
 from events import UserRequestEvent
 
-@pytest.fixture
-def mock_app() -> Generator[App, None, None]:
- with (
-  patch('gui_2.load_config', return_value={
-    "ai": {"provider": "gemini", "model": "model-1", "temperature": 0.0, "max_tokens": 100, "history_trunc_limit": 1000},
-    "projects": {"paths": [], "active": ""},
-    "gui": {"show_windows": {}}
-   }),
-  patch('gui_2.project_manager.load_project', return_value={
-    "project": {"name": "test_proj"},
-    "discussion": {"active": "main", "discussions": {"main": {"history": []}}},
-    "files": {"paths": [], "base_dir": "."},
-    "screenshots": {"paths": [], "base_dir": "."},
-    "agent": {"tools": {}}
-   }),
-  patch('gui_2.project_manager.migrate_from_legacy_config', return_value={}),
-  patch('gui_2.project_manager.save_project'),
-  patch('gui_2.session_logger.open_session'),
-  patch('gui_2.App._init_ai_and_hooks'),
-  patch('gui_2.App._fetch_models')
- ):
-  app = App()
-  yield app
-  # We don't have a clean way to stop the loop thread in gui_2.py App
-  # so we just let it daemon-exit.
-
 @pytest.mark.timeout(10)
 def test_user_request_integration_flow(mock_app: App) -> None:
  """