feat: Add nested search in folders (#14372)

Co-authored-by: Milorad FIlipović <milorad@n8n.io>

packages/cli/test/integration/workflows/workflows.controller.test.ts

@@ -1056,8 +1056,7 @@ describe('GET /workflows', () => {
 						parentFolder: {
 							id: folder.id,
 							name: folder.name,
-							createdAt: expect.any(String),
-							updatedAt: expect.any(String),
+							parentFolderId: null,
 						},
 					},
 					{
@@ -1615,6 +1614,66 @@ describe('GET /workflows?includeFolders=true', () => {
 			expect(response2.body.data).toHaveLength(0);
 		});
 
+		test('should filter workflows by parentFolderId and its descendants when filtering by name', async () => {
+			const pp = await Container.get(ProjectRepository).getPersonalProjectForUserOrFail(owner.id);
+
+			await createFolder(pp, {
+				name: 'Root Folder 1',
+			});
+
+			const rootFolder2 = await createFolder(pp, {
+				name: 'Root Folder 2',
+			});
+
+			await createFolder(pp, {
+				name: 'Root Folder 3',
+			});
+
+			const subfolder1 = await createFolder(pp, {
+				name: 'Root folder 2 subfolder 1 key',
+				parentFolder: rootFolder2,
+			});
+
+			await createWorkflow(
+				{
+					name: 'Workflow 1 key',
+					parentFolder: rootFolder2,
+				},
+				pp,
+			);
+
+			await createWorkflow(
+				{
+					name: 'workflow 2 key',
+					parentFolder: rootFolder2,
+				},
+				pp,
+			);
+
+			await createWorkflow(
+				{
+					name: 'workflow 3 key',
+					parentFolder: subfolder1,
+				},
+				pp,
+			);
+
+			const filter2Response = await authOwnerAgent
+				.get('/workflows')
+				.query(
+					`filter={ "projectId": "${pp.id}", "parentFolderId": "${rootFolder2.id}", "name": "key" }&includeFolders=true`,
+				);
+
+			expect(filter2Response.body.count).toBe(4);
+			expect(filter2Response.body.data).toHaveLength(4);
+			expect(
+				filter2Response.body.data.filter((w: WorkflowFolderUnionFull) => w.resource === 'workflow'),
+			).toHaveLength(3);
+			expect(
+				filter2Response.body.data.filter((w: WorkflowFolderUnionFull) => w.resource === 'folder'),
+			).toHaveLength(1);
+		});
+
 		test('should return homeProject when filtering workflows and folders by projectId', async () => {
 			const workflow = await createWorkflow({ name: 'First' }, owner);
 			await shareWorkflowWithUsers(workflow, [member]);