refactor: refactorizar mocks de validación de usuario para aislamiento local

Co-authored-by: aider (openrouter/x-ai/grok-code-fast-1) <aider@aider.chat>

tests/unit/server.test.ts

@@ -524,24 +524,24 @@ describe('WebhookServer', () => {
     let mockEnsureUserExists: any;
     let consoleSpy: any;
     let originalConsoleLog: any;
+    let originalEnsureUserExists: any;
 
     beforeEach(async () => {
+      // Import the db module dynamically to mock ensureUserExists locally
+      const dbModule = await import('../../src/db');
+      originalEnsureUserExists = dbModule.ensureUserExists;
       mockEnsureUserExists = mock(() => '1234567890');
-      
-      // Mock the db module to replace ensureUserExists
-      mock.module('../../src/db', () => ({
-        db: {},
-        getDb: () => ({}),
-        initializeDatabase: () => {},
-        ensureUserExists: mockEnsureUserExists
-      }));
+      dbModule.ensureUserExists = mockEnsureUserExists;
 
       originalConsoleLog = console.log;
       consoleSpy = mock(() => {});
       console.log = consoleSpy;
     });
 
-    afterEach(() => {
+    afterEach(async () => {
+      // Restore the original functions manually
+      const dbModule = await import('../../src/db');
+      dbModule.ensureUserExists = originalEnsureUserExists;
       console.log = originalConsoleLog;
     });