Refactor tests and services for improved type safety and error handling

- Updated FlyerCorrectionTool tests to remove unused error notification.
- Enhanced ProfileManager tests and component to include points in user profile.
- Fixed error handling in ProfileManager to correctly log error messages.
- Adjusted AI routes tests to ensure proper mocking and added missing properties in mock responses.
- Refined AI routes to improve error message extraction and payload handling.
- Cleaned up gamification routes tests by removing unnecessary parameters.
- Simplified public routes by removing unused parameters in async handlers.
- Improved system routes tests to handle exec command callbacks more robustly.
- Updated user routes tests to remove unnecessary middleware parameters.
- Enhanced AI API client tests to use File objects for simulating uploads.
- Modified AI service tests to improve type safety and mock implementations.
- Refined database service tests to ensure proper type assertions and mock setups.
- Updated express type definitions for better clarity and organization.
- Cleaned up notification service tests to mock local re-exports instead of library directly.

src/components/FlyerCorrectionTool.test.tsx

@@ -4,7 +4,7 @@ import { render, screen, fireEvent, waitFor } from '@testing-library/react';
 import { describe, it, expect, vi, beforeEach, type Mocked } from 'vitest';
 import { FlyerCorrectionTool } from './FlyerCorrectionTool';
 import * as aiApiClient from '../services/aiApiClient';
-import { notifyError, notifySuccess } from '../services/notificationService';
+import { notifySuccess } from '../services/notificationService';
 
 // Mock dependencies
 vi.mock('../services/aiApiClient');