feat(ui): Implement Track Browser and progress visualization in MMA Dashboard

tests/test_mma_dashboard_refresh.py

@@ -0,0 +1,66 @@
+import pytest
+from unittest.mock import patch, MagicMock
+from gui_2 import App
+
+@pytest.fixture
+def app_instance():
+    # We patch the dependencies of App.__init__ to avoid side effects
+    with (
+        patch('gui_2.load_config', return_value={'ai': {}, 'projects': {}}),
+        patch('gui_2.save_config'),
+        patch('gui_2.project_manager') as mock_pm,
+        patch('gui_2.session_logger'),
+        patch('gui_2.immapp.run'),
+        patch.object(App, '_load_active_project'),
+        patch.object(App, '_fetch_models'),
+        patch.object(App, '_load_fonts'),
+        patch.object(App, '_post_init')
+    ):
+        app = App()
+        # Ensure project and ui_files_base_dir are set for _refresh_from_project
+        app.project = {}
+        app.ui_files_base_dir = "."
+        # Return the app and the mock_pm for use in tests
+        yield app, mock_pm
+
+def test_mma_dashboard_refresh(app_instance):
+    app, mock_pm = app_instance
+    
+    # 1. Define mock tracks
+    mock_tracks = [
+        MagicMock(id="track_1", description="Track 1"),
+        MagicMock(id="track_2", description="Track 2")
+    ]
+    
+    # 2. Patch get_all_tracks to return our mock list
+    mock_pm.get_all_tracks.return_value = mock_tracks
+    
+    # 3. Call _refresh_from_project
+    app._refresh_from_project()
+    
+    # 4. Verify that app.tracks contains the mock tracks
+    assert hasattr(app, 'tracks'), "App instance should have a 'tracks' attribute"
+    assert app.tracks == mock_tracks
+    assert len(app.tracks) == 2
+    assert app.tracks[0].id == "track_1"
+    assert app.tracks[1].id == "track_2"
+    
+    # Verify get_all_tracks was called with the correct base_dir
+    mock_pm.get_all_tracks.assert_called_with(app.ui_files_base_dir)
+
+def test_mma_dashboard_initialization_refresh(app_instance):
+    """
+    Checks that _refresh_from_project is called during initialization if 
+    _load_active_project is NOT mocked to skip it (but here it IS mocked in fixture).
+    This test verifies that calling it manually works as expected for initialization scenarios.
+    """
+    app, mock_pm = app_instance
+    
+    mock_tracks = [MagicMock(id="init_track", description="Initial Track")]
+    mock_pm.get_all_tracks.return_value = mock_tracks
+    
+    # Simulate the refresh that would happen during a project load
+    app._refresh_from_project()
+    
+    assert app.tracks == mock_tracks
+    assert app.tracks[0].id == "init_track"