feat(gui): Implement event-driven API metrics updates and decouple from render loop

tests/test_gui_diagnostics.py

@@ -53,7 +53,7 @@ def test_diagnostics_panel_updates(app_instance):
         
         # We also need to mock ai_client stats
         with patch('ai_client.get_history_bleed_stats', return_value={}):
-            app_instance._update_telemetry_panel()
+            app_instance._update_performance_diagnostics()
             
             # Verify UI updates
             mock_set_value.assert_any_call("perf_fps_text", "100.0")

tests/test_gui_events.py

@@ -0,0 +1,62 @@
+
+import pytest
+from unittest.mock import MagicMock, patch
+import dearpygui.dearpygui as dpg
+import gui
+from gui import App
+import ai_client
+
+@pytest.fixture
+def app_instance():
+    """
+    Fixture to create an instance of the App class for testing.
+    It creates a real DPG context but mocks functions that would
+    render a window or block execution.
+    """
+    dpg.create_context()
+    
+    with patch('dearpygui.dearpygui.create_viewport'), \
+         patch('dearpygui.dearpygui.setup_dearpygui'), \
+         patch('dearpygui.dearpygui.show_viewport'), \
+         patch('dearpygui.dearpygui.start_dearpygui'), \
+         patch('gui.load_config', return_value={}), \
+         patch('gui.PerformanceMonitor'), \
+         patch('gui.shell_runner'), \
+         patch('gui.project_manager'), \
+         patch.object(App, '_load_active_project'), \
+         patch.object(App, '_rebuild_files_list'), \
+         patch.object(App, '_rebuild_shots_list'), \
+         patch.object(App, '_rebuild_disc_list'), \
+         patch.object(App, '_rebuild_disc_roles_list'), \
+         patch.object(App, '_rebuild_discussion_selector'), \
+         patch.object(App, '_refresh_project_widgets'):
+        
+        app = App()
+        yield app
+    
+    dpg.destroy_context()
+
+def test_gui_updates_on_event(app_instance):
+    # Patch dependencies for the test
+    with patch('dearpygui.dearpygui.set_value') as mock_set_value, \
+         patch('dearpygui.dearpygui.does_item_exist', return_value=True), \
+         patch('dearpygui.dearpygui.configure_item'), \
+         patch('ai_client.get_history_bleed_stats') as mock_stats:
+        
+        mock_stats.return_value = {"percentage": 50.0, "current": 500, "limit": 1000}
+        
+        # We'll use patch.object to see if _refresh_api_metrics is called
+        with patch.object(app_instance, '_refresh_api_metrics', wraps=app_instance._refresh_api_metrics) as mock_refresh:
+            # Simulate event
+            ai_client.events.emit("response_received", payload={})
+            
+            # Process tasks manually
+            app_instance._process_pending_gui_tasks()
+            
+            # Verify that _refresh_api_metrics was called
+            mock_refresh.assert_called_once()
+        
+        # Verify that dpg.set_value was called for the metrics widgets
+        calls = [call.args[0] for call in mock_set_value.call_args_list]
+        assert "token_budget_bar" in calls
+        assert "token_budget_label" in calls

tests/test_gui_updates.py

@@ -41,7 +41,7 @@ def app_instance():
 
 def test_telemetry_panel_updates_correctly(app_instance):
     """
-    Tests that the _update_telemetry_panel method correctly updates
+    Tests that the _update_performance_diagnostics method correctly updates
     DPG widgets based on the stats from ai_client.
     """
     # 1. Set the provider to anthropic
@@ -64,7 +64,7 @@ def test_telemetry_panel_updates_correctly(app_instance):
          patch('dearpygui.dearpygui.does_item_exist', return_value=True) as mock_does_item_exist:
 
         # 4. Call the method under test
-        app_instance._update_telemetry_panel()
+        app_instance._refresh_api_metrics()
 
         # 5. Assert the results
         mock_get_stats.assert_called_once()
@@ -78,7 +78,7 @@ def test_telemetry_panel_updates_correctly(app_instance):
 
 def test_cache_data_display_updates_correctly(app_instance):
     """
-    Tests that the _update_telemetry_panel method correctly updates the
+    Tests that the _update_performance_diagnostics method correctly updates the
     GUI with Gemini cache statistics when the provider is set to Gemini.
     """
     # 1. Set the provider to Gemini
@@ -104,7 +104,7 @@ def test_cache_data_display_updates_correctly(app_instance):
         with patch('ai_client.get_history_bleed_stats', return_value={}):
             
             # 4. Call the method under test
-            app_instance._update_telemetry_panel()
+            app_instance._refresh_api_metrics()
 
             # 5. Assert the results
             mock_get_cache_stats.assert_called_once()