fix(test): improve test isolation and reduce noise in unit tests

- Add logger/error-utils mocks to cleaner-handler test to suppress IPC error log noise
- Move setupServiceMocks into beforeEach for consistent default mocking in cleaner tests
- Replace vi.waitFor (2s timeout) with setImmediate microtask flush in extractor test
- Remove dead activeType assignments in validation-database test
- Align TestUser.id type with UserInfo.id (string → number) and use deterministic counter

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/fixtures/factory.ts

@@ -73,10 +73,12 @@ export class UserFactory {
   /**
    * Generate unique user ID
    *
-   * @returns Unique ID string in format USR-{timestamp}-{random}
+   * @returns Unique numeric ID
    */
-  private static generateId(): string {
-    return `USR-${Date.now()}-${Math.random().toString(36).substr(2, 6)}`
+  private static idCounter = 0
+
+  private static generateId(): number {
+    return ++UserFactory.idCounter
   }
 
   /**

tests/fixtures/types.ts

@@ -88,8 +88,8 @@ export interface Order {
  * Simplified user data for creating test users.
  */
 export interface TestUser {
-  /** User ID */
-  id: string
+  /** User ID (matches UserInfo.id: number) */
+  id: number
   /** Username for login */
   username: string
   /** User type/role */

tests/fixtures/user-factory.test.ts

@@ -2,17 +2,22 @@
  * UserFactory Unit Tests
  */
 
-import { describe, it, expect } from 'vitest'
+import { describe, it, expect, beforeEach } from 'vitest'
 import { UserFactory } from './factory'
 
 describe('UserFactory', () => {
+  beforeEach(() => {
+    // Reset ID counter to ensure test isolation
+    ;(UserFactory as any).idCounter = 0
+  })
+
   it('creates user with default role', () => {
     const user = UserFactory.createUser()
 
     expect(user.username).toMatch(/^test_user_\d+$/)
     expect(user.userType).toBe('User')
     expect(user.permissions).toEqual(['read', 'write'])
-    expect(user.id).toMatch(/^USR-\d+-[a-z0-9]+$/)
+    expect(user.id).toBeTypeOf('number')
   })
 
   it('creates admin with correct permissions', () => {
@@ -20,7 +25,7 @@ describe('UserFactory', () => {
 
     expect(admin.userType).toBe('Admin')
     expect(admin.permissions).toEqual(['read', 'write', 'delete', 'admin'])
-    expect(admin.id).toMatch(/^USR-\d+-[a-z0-9]+$/)
+    expect(admin.id).toBeTypeOf('number')
   })
 
   it('generates unique IDs', () => {