refactor: Simplify styling service and widget creation

- Remove ProvenanceButton from widget_creation_config
- Simplify enabled_field_styling_service

Author: trissim

src/pyqt_reactive/forms/widget_creation_config.py

@@ -292,14 +292,14 @@ def on_title_click(e):
     logger.debug(f"🔍 _move_enabled_widget_to_title: dotted_path={dotted_path}, has_provenance={has_provenance}")
     provenance_button.update_visibility_based_on_provenance()
 
-    # Underline title label if enabled field's value differs from signature
+    # Underline checkbox if enabled field's value differs from signature
     should_underline = dotted_path in nested_manager.state.signature_diff_fields
     logger.debug(f"🔍 _move_enabled_widget_to_title: should_underline={should_underline}, signature_diff_fields={nested_manager.state.signature_diff_fields}")
-    if should_underline and title_label:
-        font = title_label.font()
+    if should_underline and isinstance(checkbox_widget, NoneAwareCheckBox):
+        font = checkbox_widget.font()
         font.setUnderline(True)
-        title_label.setFont(font)
-        logger.debug(f"🔍 _move_enabled_widget_to_title: underlined title_label for signature diff")
+        checkbox_widget.setFont(font)
+        logger.debug(f"🔍 _move_enabled_widget_to_title: underlined checkbox_widget for signature diff")
 
     container.addEnableableWidgets(enabled_widget, enabled_reset_button, provenance_button)
     logger.debug(f"🔍 _move_enabled_widget_to_title: added widgets to container, provenance_button visible={provenance_button.isVisible()}")

src/pyqt_reactive/services/enabled_field_styling_service.py

@@ -295,16 +295,16 @@ def _apply_nested_config_styling(self, manager, resolved_value: bool) -> None:
                 effect.setOpacity(0.4)
                 widget.setGraphicsEffect(effect)
 
-        # Update provenance button visibility and title label underline
-        self._update_title_label_styling(manager)
+        # Update provenance button visibility and checkbox underline
+        self._update_enabled_field_title_styling(manager)
 
-    def _update_title_label_styling(self, manager) -> None:
+    def _update_enabled_field_title_styling(self, manager) -> None:
         """
-        Update title label styling for nested configs with enabled fields.
+        Update title styling for nested configs with enabled fields.
 
         This handles:
         - Provenance button visibility (only show when provenance source available)
-        - Title label underline (when enabled field's value differs from signature)
+        - Checkbox underline (when enabled field's value differs from signature)
 
         Args:
             manager: ParameterFormManager instance (nested manager)
@@ -325,11 +325,6 @@ def _update_title_label_styling(self, manager) -> None:
         if not group_box:
             return
 
-        # Get title label from GroupBox
-        title_label = getattr(group_box, '_title_label', None)
-        if not title_label:
-            return
-
         # Update provenance button visibility
         # The button is in the title layout, we need to find it
         from pyqt_reactive.widgets.shared.clickable_help_components import ProvenanceButton
@@ -339,13 +334,16 @@ def _update_title_label_styling(self, manager) -> None:
                 logger.debug(f"[TITLE_STYLING] Updated provenance button visibility for {param_name}")
                 break
 
-        # Update title label underline based on signature diff
-        dotted_path = f'{manager.field_id}.{param_name}' if manager.field_id else param_name
-        should_underline = dotted_path in manager.state.signature_diff_fields
-        font = title_label.font()
-        font.setUnderline(should_underline)
-        title_label.setFont(font)
-        logger.debug(f"[TITLE_STYLING] field_id={param_name}, should_underline={should_underline}")
+        # Update checkbox underline based on signature diff
+        # The checkbox is the enabled widget, we need to find it
+        enabled_widget = manager.widgets.get('enabled')
+        if enabled_widget:
+            dotted_path = f'{manager.field_id}.{param_name}' if manager.field_id else param_name
+            should_underline = dotted_path in manager.state.signature_diff_fields
+            font = enabled_widget.font()
+            font.setUnderline(should_underline)
+            enabled_widget.setFont(font)
+            logger.debug(f"[TITLE_STYLING] field_id={param_name}, should_underline={should_underline}")
 
         # CRITICAL: Trigger a visual update so opacity effects are rendered
         # Qt doesn't automatically render QGraphicsOpacityEffect changes