Migrate page layout services (#16443)

Last step of the page layout migration:
- Migrate services
- Write integration tests

packages/twenty-server/src/modules/dashboard/query-hooks/dashboard-create-one.pre-query.hook.ts

@@ -1,18 +1,16 @@
 import { Injectable } from '@nestjs/common';
-import { InjectDataSource } from '@nestjs/typeorm';
 
 import { assertIsDefinedOrThrow } from 'twenty-shared/utils';
-import { DataSource } from 'typeorm';
 
 import { type WorkspacePreQueryHookInstance } from 'src/engine/api/graphql/workspace-query-runner/workspace-query-hook/interfaces/workspace-query-hook.interface';
 import { type CreateOneResolverArgs } from 'src/engine/api/graphql/workspace-resolver-builder/interfaces/workspace-resolvers-builder.interface';
 
 import { WorkspaceQueryHook } from 'src/engine/api/graphql/workspace-query-runner/workspace-query-hook/decorators/workspace-query-hook.decorator';
 import { type AuthContext } from 'src/engine/core-modules/auth/types/auth-context.type';
+import { WorkspaceNotFoundDefaultError } from 'src/engine/core-modules/workspace/workspace.exception';
 import { PageLayoutType } from 'src/engine/metadata-modules/page-layout/enums/page-layout-type.enum';
 import { PageLayoutTabService } from 'src/engine/metadata-modules/page-layout/services/page-layout-tab.service';
 import { PageLayoutService } from 'src/engine/metadata-modules/page-layout/services/page-layout.service';
-import { WorkspaceNotFoundDefaultError } from 'src/engine/core-modules/workspace/workspace.exception';
 import { type DashboardWorkspaceEntity } from 'src/modules/dashboard/standard-objects/dashboard.workspace-entity';
 
 @Injectable()
@@ -23,8 +21,6 @@ export class DashboardCreateOnePreQueryHook
   constructor(
     private readonly pageLayoutService: PageLayoutService,
     private readonly pageLayoutTabService: PageLayoutTabService,
-    @InjectDataSource()
-    private readonly coreDataSource: DataSource,
   ) {}
 
   async execute(
@@ -36,29 +32,25 @@ export class DashboardCreateOnePreQueryHook
 
     assertIsDefinedOrThrow(workspace, WorkspaceNotFoundDefaultError);
 
-    return await this.coreDataSource.transaction(async (manager) => {
-      const pageLayout = await this.pageLayoutService.create(
-        {
-          type: PageLayoutType.DASHBOARD,
-          objectMetadataId: null,
-          name: 'Dashboard Layout',
-        },
-        workspace.id,
-        manager,
-      );
+    const pageLayout = await this.pageLayoutService.create(
+      {
+        type: PageLayoutType.DASHBOARD,
+        objectMetadataId: null,
+        name: 'Dashboard Layout',
+      },
+      workspace.id,
+    );
 
-      await this.pageLayoutTabService.create(
-        {
-          title: 'Tab 1',
-          pageLayoutId: pageLayout.id,
-        },
-        workspace.id,
-        manager,
-      );
+    await this.pageLayoutTabService.create(
+      {
+        title: 'Tab 1',
+        pageLayoutId: pageLayout.id,
+      },
+      workspace.id,
+    );
 
-      payload.data.pageLayoutId = pageLayout.id;
+    payload.data.pageLayoutId = pageLayout.id;
 
-      return payload;
-    });
+    return payload;
   }
 }