fix(ui): really do not load disabled tabs

Ensure disabled tabs are never mounted:
- Add didLoad flag to configSlice, default false
- Always merge in config - even it is is empty
- On first merge, set didLoad to true
- Until didLoad is true, mark _all_ tabs as disabled

This gets around an issue where tabs are all enabled for a brief moment
before the config is loaded.

A bit hacky but it works.

invokeai/frontend/web/src/app/components/GlobalHookIsolator.tsx

@@ -10,7 +10,6 @@ import type { PartialAppConfig } from 'app/types/invokeai';
 import { useFocusRegionWatcher } from 'common/hooks/focus';
 import { useCloseChakraTooltipsOnDragFix } from 'common/hooks/useCloseChakraTooltipsOnDragFix';
 import { useGlobalHotkeys } from 'common/hooks/useGlobalHotkeys';
-import { size } from 'es-toolkit/compat';
 import { useDynamicPromptsWatcher } from 'features/dynamicPrompts/hooks/useDynamicPromptsWatcher';
 import { useStarterModelsToast } from 'features/modelManagerV2/hooks/useStarterModelsToast';
 import { useWorkflowBuilderWatcher } from 'features/nodes/components/sidePanel/workflow/IsolatedWorkflowBuilderWatcher';
@@ -55,10 +54,8 @@ export const GlobalHookIsolator = memo(
     }, [language]);
 
     useEffect(() => {
-      if (size(config)) {
-        logger.info({ config }, 'Received config');
-        dispatch(configChanged(config));
-      }
+      logger.info({ config }, 'Received config');
+      dispatch(configChanged(config));
     }, [dispatch, config, logger]);
 
     useEffect(() => {