fix: bug with two vm stores and view models config

Author: js2me

.changeset/fancy-tigers-report.md

@@ -0,0 +1,5 @@
+---
+"mobx-view-model": patch
+---
+
+fix overriding observable config after create second view model store

src/config/utils/merge-vm-configs.ts

@@ -1,17 +1,23 @@
 import type { Maybe } from 'yummies/types';
 
-import { viewModelsConfig } from '../global-config.js';
+import { viewModelsConfig as globalConfig } from '../global-config.js';
 import type { ViewModelsConfig, ViewModelsRawConfig } from '../types.js';
 
 /**
  * [**Documentation**](https://js2me.github.io/mobx-view-model/api/view-models/view-models-config)
  */
 export const mergeVMConfigs = (...configs: Maybe<ViewModelsRawConfig>[]) => {
   const result: ViewModelsConfig = {
-    ...viewModelsConfig,
-    startViewTransitions: structuredClone(
-      viewModelsConfig.startViewTransitions,
-    ),
+    ...globalConfig,
+    startViewTransitions: structuredClone(globalConfig.startViewTransitions),
+    observable: {
+      viewModels: {
+        ...globalConfig.observable.viewModels,
+      },
+      viewModelStores: {
+        ...globalConfig.observable.viewModelStores,
+      },
+    },
   };
 
   configs.forEach((config) => {

src/view-model/view-model.store.base.test.ts

@@ -1,7 +1,7 @@
 import { describe, expect, it, vi } from 'vitest';
 
 import type { AnyObject, EmptyObject, Maybe } from 'yummies/types';
-
+import type { ViewModelsConfig } from '../config/types.js';
 import { ViewModelBaseMock } from './view-model.base.test.js';
 import type { ViewModel } from './view-model.js';
 import { ViewModelStoreBase } from './view-model.store.base.js';
@@ -185,4 +185,21 @@ describe('ViewModelStoreBase', () => {
 
     expect(vmStore.getId(MyVM)).toBe(vm.id);
   });
+
+  it('bug with overriding observable after create second store', async () => {
+    new ViewModelStoreBase({
+      vmConfig: {
+        observable: {
+          viewModelStores: { useDecorators: false },
+          viewModels: { useDecorators: false },
+        },
+      },
+    });
+    const vmStore2 = new ViewModelStoreBaseMock();
+
+    const vmConfig = (vmStore2 as any).vmConfig as ViewModelsConfig;
+
+    expect(vmConfig.observable.viewModelStores.useDecorators).toBe(true);
+    expect(vmConfig.observable.viewModels.useDecorators).toBe(true);
+  });
 });