fix: correct test import paths and improve mocks

tests/unit/services/group-sync.test.ts

@@ -1,7 +1,7 @@
 import { describe, it, expect, beforeEach, mock, spyOn } from 'bun:test';
-import { GroupSyncService } from '../../src/services/group-sync';
-import { db } from '../../src/db';
-import { env } from '../../src/env';
+import { GroupSyncService } from '../../../src/services/group-sync';
+import { db } from '../../../src/db';
+import { env } from '../../../src/env';
 
 // Mock the environment variables
 const originalEnv = { ...env };
@@ -13,16 +13,14 @@ const mockEnv = {
 };
 
 // Mock fetch
-const mockFetch = mock.global('fetch', () => {
-  return Promise.resolve({
-    ok: true,
-    json: () => Promise.resolve([
-      { id: 'group1', subject: 'Group 1', linkedParent: 'test-community' },
-      { id: 'group2', subject: 'Group 2', linkedParent: 'other-community' },
-      { id: 'group3', subject: 'Group 3' } // No linkedParent
-    ])
-  });
-});
+const mockFetch = mock.global('fetch', async () => ({
+  ok: true,
+  json: async () => [
+    { id: 'group1', subject: 'Group 1', linkedParent: 'test-community' },
+    { id: 'group2', subject: 'Group 2', linkedParent: 'other-community' },
+    { id: 'group3', subject: 'Group 3' } // No linkedParent
+  ]
+}));
 
 describe('GroupSyncService', () => {
   beforeEach(() => {
@@ -33,6 +31,7 @@ describe('GroupSyncService', () => {
 
   afterAll(() => {
     Object.assign(env, originalEnv);
+    mockFetch.mockRestore();
   });
 
   describe('syncGroups', () => {