test: increase test coverage for listings, auth, and search modules

Add 33 new test files to reach coverage targets:
- Listings: 13 → 28 test files (50%+)
- Auth: 21 → 36 test files (50%+)
- Search: 10 → 13 test files (59%+)

New tests cover domain entities, value objects, services, guards,
decorators, DTOs, repositories, controllers, and event handlers.
Total: 204 test files, 1178 tests passing.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/auth/domain/__tests__/auth-domain-events.spec.ts

@@ -0,0 +1,84 @@
+import { describe, it, expect } from 'vitest';
+import { AgentVerifiedEvent } from '../events/agent-verified.event';
+import { UserDeactivatedEvent } from '../events/user-deactivated.event';
+import { UserKycUpdatedEvent } from '../events/user-kyc-updated.event';
+import { UserRegisteredEvent } from '../events/user-registered.event';
+
+describe('Auth Domain Events — construction & property access', () => {
+  describe('UserRegisteredEvent', () => {
+    it('stores aggregateId, phone and role', () => {
+      const event = new UserRegisteredEvent('u-1', '+84900000001', 'BUYER');
+      expect(event.aggregateId).toBe('u-1');
+      expect(event.phone).toBe('+84900000001');
+      expect(event.role).toBe('BUYER');
+    });
+
+    it('has eventName "user.registered"', () => {
+      const event = new UserRegisteredEvent('u-2', '+84900000002', 'AGENT');
+      expect(event.eventName).toBe('user.registered');
+    });
+
+    it('sets occurredAt to a recent Date', () => {
+      const before = new Date();
+      const event = new UserRegisteredEvent('u-3', '+84900000003', 'SELLER');
+      const after = new Date();
+      expect(event.occurredAt.getTime()).toBeGreaterThanOrEqual(before.getTime());
+      expect(event.occurredAt.getTime()).toBeLessThanOrEqual(after.getTime());
+    });
+  });
+
+  describe('AgentVerifiedEvent', () => {
+    it('stores aggregateId and userId', () => {
+      const event = new AgentVerifiedEvent('agent-1', 'user-1');
+      expect(event.aggregateId).toBe('agent-1');
+      expect(event.userId).toBe('user-1');
+    });
+
+    it('has eventName "agent.verified"', () => {
+      const event = new AgentVerifiedEvent('agent-2', 'user-2');
+      expect(event.eventName).toBe('agent.verified');
+    });
+
+    it('sets occurredAt to a Date instance', () => {
+      const event = new AgentVerifiedEvent('agent-3', 'user-3');
+      expect(event.occurredAt).toBeInstanceOf(Date);
+    });
+  });
+
+  describe('UserKycUpdatedEvent', () => {
+    it('stores aggregateId, newStatus, and previousStatus', () => {
+      const event = new UserKycUpdatedEvent('u-1', 'APPROVED', 'PENDING');
+      expect(event.aggregateId).toBe('u-1');
+      expect(event.newStatus).toBe('APPROVED');
+      expect(event.previousStatus).toBe('PENDING');
+    });
+
+    it('has eventName "user.kyc_updated"', () => {
+      const event = new UserKycUpdatedEvent('u-2', 'REJECTED', 'APPROVED');
+      expect(event.eventName).toBe('user.kyc_updated');
+    });
+
+    it('tracks status transition from NONE to PENDING', () => {
+      const event = new UserKycUpdatedEvent('u-3', 'PENDING', 'NONE');
+      expect(event.newStatus).toBe('PENDING');
+      expect(event.previousStatus).toBe('NONE');
+    });
+  });
+
+  describe('UserDeactivatedEvent', () => {
+    it('stores aggregateId', () => {
+      const event = new UserDeactivatedEvent('u-1');
+      expect(event.aggregateId).toBe('u-1');
+    });
+
+    it('has eventName "user.deactivated"', () => {
+      const event = new UserDeactivatedEvent('u-2');
+      expect(event.eventName).toBe('user.deactivated');
+    });
+
+    it('sets occurredAt to a Date instance', () => {
+      const event = new UserDeactivatedEvent('u-3');
+      expect(event.occurredAt).toBeInstanceOf(Date);
+    });
+  });
+});