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--- a/.kiro/specs/car-maintenance-system/design.md
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+# Design Document
+
+## Overview
+
+The car maintenance management system is designed as a modern, responsive web application built with Remix, featuring Arabic language support with RTL layout, role-based authentication, and comprehensive business management capabilities. The system follows a modular architecture with clear separation of concerns, utilizing Prisma for database operations and Tailwind CSS for styling.
+
+## Architecture
+
+### High-Level Architecture
+
+```mermaid
+graph TB
+    A[Client Browser] --> B[Remix Frontend]
+    B --> C[Remix Backend/API Routes]
+    C --> D[Prisma ORM]
+    D --> E[SQLite Database]
+    
+    F[Authentication Middleware] --> C
+    G[Session Management] --> C
+    H[Route Protection] --> B
+    
+    subgraph "Frontend Components"
+        I[Dashboard Layout]
+        J[RTL Components]
+        K[Responsive Navigation]
+        L[Form Components]
+    end
+    
+    B --> I
+    B --> J
+    B --> K
+    B --> L
+```
+
+### Technology Stack
+
+- **Frontend Framework**: Remix with React 18
+- **Backend**: Remix server-side rendering and API routes
+- **Database**: SQLite with Prisma ORM
+- **Styling**: Tailwind CSS with RTL support
+- **Authentication**: Custom session-based authentication
+- **TypeScript**: Full type safety throughout the application
+
+## Components and Interfaces
+
+### 1. Authentication System
+
+#### Session Management
+- Custom session-based authentication using Remix sessions
+- Secure cookie storage with httpOnly and secure flags
+- Session expiration and renewal mechanisms
+- CSRF protection for form submissions
+
+#### User Authentication Flow
+```mermaid
+sequenceDiagram
+    participant U as User
+    participant A as Auth Route
+    participant S as Session Store
+    participant D as Database
+    
+    U->>A: Submit login credentials
+    A->>D: Validate user credentials
+    D-->>A: Return user data
+    A->>S: Create session
+    S-->>A: Return session cookie
+    A-->>U: Redirect with session cookie
+```
+
+#### Route Protection Middleware
+- Higher-order component for protecting routes based on auth levels
+- Automatic redirection to login for unauthenticated users
+- Role-based access control for different user types
+
+### 2. Database Schema Design
+
+#### Core Entities and Relationships
+
+```mermaid
+erDiagram
+    User {
+        int id PK
+        string name
+        string username UK
+        string email UK
+        string password
+        enum status
+        int authLevel
+        datetime createdDate
+        datetime editDate
+    }
+    
+    Customer {
+        int id PK
+        string name
+        string phone
+        string email
+        string address
+        datetime createdDate
+        datetime updateDate
+    }
+    
+    Vehicle {
+        int id PK
+        string plateNumber UK
+        string bodyType
+        string manufacturer
+        string model
+        string trim
+        int year
+        string transmission
+        string fuel
+        int cylinders
+        decimal engineDisplacement
+        enum useType
+        int ownerId FK
+        datetime lastVisitDate
+        datetime suggestedNextVisitDate
+        datetime createdDate
+        datetime updateDate
+    }
+    
+    MaintenanceVisit {
+        int id PK
+        int vehicleId FK
+        int customerId FK
+        string maintenanceType
+        string description
+        decimal cost
+        string paymentStatus
+        int kilometers
+        datetime visitDate
+        datetime createdDate
+        datetime updateDate
+    }
+    
+    Expense {
+        int id PK
+        string description
+        string category
+        decimal amount
+        datetime expenseDate
+        datetime createdDate
+        datetime updateDate
+    }
+    
+    Income {
+        int id PK
+        int maintenanceVisitId FK
+        decimal amount
+        datetime incomeDate
+        datetime createdDate
+        datetime updateDate
+    }
+    
+    Customer ||--o{ Vehicle : owns
+    Vehicle ||--o{ MaintenanceVisit : has
+    Customer ||--o{ MaintenanceVisit : books
+    MaintenanceVisit ||--|| Income : generates
+```
+
+### 3. UI/UX Design System
+
+#### RTL Layout Implementation
+- CSS logical properties for directional layouts
+- Arabic font integration (Noto Sans Arabic, Cairo)
+- Tailwind CSS RTL plugin configuration
+- Component-level RTL support with `dir="rtl"` attribute
+
+#### Responsive Design Breakpoints
+```css
+/* Mobile First Approach */
+sm: 640px   /* Small devices */
+md: 768px   /* Medium devices */
+lg: 1024px  /* Large devices */
+xl: 1280px  /* Extra large devices */
+2xl: 1536px /* 2X Extra large devices */
+```
+
+#### Color Scheme and Theming
+- Primary colors: Blue gradient (#3B82F6 to #1E40AF)
+- Secondary colors: Gray scale for neutral elements
+- Success: Green (#10B981)
+- Warning: Amber (#F59E0B)
+- Error: Red (#EF4444)
+- Dark mode support for future enhancement
+- Design : use constant design for all pages, forms and buttons.
+
+### 4. Navigation and Layout System
+
+#### Dashboard Layout Structure
+```mermaid
+graph LR
+    A[App Shell] --> B[Sidebar Navigation]
+    A --> C[Main Content Area]
+    A --> D[Header Bar]
+    
+    B --> E[Logo Area]
+    B --> F[Navigation Menu]
+    B --> G[User Profile]
+    
+    C --> H[Page Content]
+    C --> I[Breadcrumbs]
+    
+    D --> J[Mobile Menu Toggle]
+    D --> K[User Actions]
+```
+
+#### Sidebar Navigation Features
+- Collapsible sidebar with full/icon-only modes
+- Mobile-responsive hamburger menu
+- Active state indicators
+- Smooth animations and transitions
+- Persistent state across page navigation
+
+### 5. Form and Data Management
+
+#### Form Validation Strategy
+- Client-side validation using HTML5 and custom validators
+- Server-side validation with Zod schemas
+- Real-time validation feedback
+- Internationalized error messages in Arabic
+
+#### Data Table Components
+- Sortable columns with Arabic text support
+- Pagination with RTL navigation
+- Search and filtering capabilities
+- Responsive table design with horizontal scrolling
+- Bulk actions for data management
+
+## Data Models
+
+### User Model
+```typescript
+interface User {
+  id: number;
+  name: string;
+  username: string;
+  email: string;
+  password: string; // hashed
+  status: 'active' | 'inactive';
+  authLevel: 1 | 2 | 3; // 1=superadmin, 2=admin, 3=user
+  createdDate: Date;
+  editDate: Date;
+}
+```
+
+### Vehicle Model
+```typescript
+interface Vehicle {
+  id: number;
+  plateNumber: string;
+  bodyType: string;
+  manufacturer: string;
+  model: string;
+  trim?: string;
+  year: number;
+  transmission: 'Automatic' | 'Manual';
+  fuel: 'Gasoline' | 'Diesel' | 'Hybrid' | 'Mild Hybrid' | 'Electric';
+  cylinders?: number;
+  engineDisplacement?: number;
+  useType: 'personal' | 'taxi' | 'apps' | 'loading' | 'travel';
+  ownerId: number;
+  lastVisitDate?: Date;
+  suggestedNextVisitDate?: Date;
+  createdDate: Date;
+  updateDate: Date;
+}
+```
+
+### Maintenance Visit Model
+```typescript
+interface MaintenanceVisit {
+  id: number;
+  vehicleId: number;
+  customerId: number;
+  maintenanceType: string;
+  description: string;
+  cost: number;
+  paymentStatus: string;
+  kilometers: number;
+  visitDate: Date;
+  nextVisitDelay: 1 | 2 | 3 | 4; // months
+  createdDate: Date;
+  updateDate: Date;
+}
+```
+
+## Error Handling
+
+### Client-Side Error Handling
+- Global error boundary for React components
+- Form validation error display
+- Network error handling with retry mechanisms
+- User-friendly error messages in Arabic
+
+### Server-Side Error Handling
+- Centralized error handling middleware
+- Database constraint violation handling
+- Authentication and authorization error responses
+- Logging and monitoring for production debugging
+
+### Error Response Format
+```typescript
+interface ErrorResponse {
+  success: false;
+  error: {
+    code: string;
+    message: string;
+    details?: any;
+  };
+}
+```
+
+## Testing Strategy
+
+### Unit Testing
+- Component testing with React Testing Library
+- Business logic testing for utility functions
+- Database model testing with Prisma
+- Authentication flow testing
+
+### Integration Testing
+- API route testing with Remix testing utilities
+- Database integration testing
+- Authentication middleware testing
+- Form submission and validation testing
+
+### End-to-End Testing
+- User journey testing for critical paths
+- Cross-browser compatibility testing
+- Mobile responsiveness testing
+- RTL layout verification
+
+### Testing Tools
+- Jest for unit testing
+- React Testing Library for component testing
+- Playwright for E2E testing
+- MSW (Mock Service Worker) for API mocking
+
+## Security Considerations
+
+### Authentication Security
+- Password hashing using bcrypt
+- Secure session management
+- CSRF protection
+- Rate limiting for authentication attempts
+
+### Data Protection
+- Input sanitization and validation
+- SQL injection prevention through Prisma
+- XSS protection through proper escaping
+- Secure headers configuration
+
+### Access Control
+- Role-based access control (RBAC)
+- Route-level protection
+- API endpoint authorization
+- Data filtering based on user permissions
+
+## Performance Optimization
+
+### Frontend Performance
+- Code splitting with Remix route-based splitting
+- Image optimization and lazy loading
+- CSS optimization with Tailwind purging
+- Bundle size monitoring and optimization
+
+### Backend Performance
+- Database query optimization with Prisma
+- Caching strategies for frequently accessed data
+- Connection pooling for database connections
+- Response compression and minification
+
+### Mobile Performance
+- Touch-friendly interface design
+- Optimized images for different screen densities
+- Reduced JavaScript bundle size for mobile
+- Progressive Web App (PWA) capabilities
+
+## Deployment and Infrastructure
+
+### Development Environment
+- Local SQLite database for development
+- Hot module replacement with Vite
+- TypeScript compilation and type checking
+- ESLint and Prettier for code quality
+
+### Production Deployment
+- Build optimization with Remix production build
+- Database migration strategy
+- Environment variable management
+- Health check endpoints for monitoring
+
+### Monitoring and Logging
+- Application performance monitoring
+- Error tracking and reporting
+- User analytics and usage metrics
+- Database performance monitoring
--- a/.kiro/specs/car-maintenance-system/requirements.md
+++ b/.kiro/specs/car-maintenance-system/requirements.md
@@ -0,0 +1,165 @@
+# Requirements Document
+
+## Introduction
+
+This document outlines the requirements for a comprehensive car maintenance management system built with Remix, SQLite, and Prisma. The system is designed for business owners to track vehicle visits and maintenance records with a focus on Arabic language support, RTL design, and mobile-friendly responsive UI/UX.
+
+## Requirements
+
+### Requirement 1: Core Framework and Database Setup
+
+**User Story:** As a business owner, I want a robust web application built on modern technologies, so that I can reliably manage my car maintenance business operations.
+
+#### Acceptance Criteria
+
+1. WHEN the application is deployed THEN the system SHALL use Remix as the web framework
+2. WHEN data needs to be stored THEN the system SHALL use SQLite database with Prisma ORM
+3. WHEN the application starts THEN the system SHALL initialize properly with all database connections established
+
+### Requirement 2: Arabic Language and RTL Support
+
+**User Story:** As an Arabic-speaking business owner, I want the interface to support Arabic language with proper RTL layout, so that I can use the system naturally in my native language.
+
+#### Acceptance Criteria
+
+1. WHEN the application loads THEN the system SHALL display all text in Arabic with RTL text direction
+2. WHEN viewing any page THEN the system SHALL render Arabic fonts correctly
+3. WHEN navigating the interface THEN all UI components SHALL support RTL layout orientation
+4. WHEN using forms THEN input fields SHALL align properly for RTL text entry
+
+### Requirement 3: Responsive Design and Mobile Support
+
+**User Story:** As a business owner who works on different devices, I want a responsive interface that works seamlessly on desktop, tablet, and mobile, so that I can manage my business from anywhere.
+
+#### Acceptance Criteria
+
+1. WHEN accessing the application on desktop THEN the system SHALL display a full dashboard layout
+2. WHEN accessing the application on tablet THEN the system SHALL adapt the layout for medium screens
+3. WHEN accessing the application on mobile THEN the system SHALL provide a mobile-optimized interface
+4. WHEN resizing the browser window THEN the system SHALL smoothly transition between responsive breakpoints
+
+### Requirement 4: Dashboard Navigation System
+
+**User Story:** As a user, I want an intuitive navigation system with collapsible sidebar, so that I can efficiently access different sections of the application.
+
+#### Acceptance Criteria
+
+1. WHEN viewing the dashboard THEN the system SHALL display a collapsible sidebar navigation menu
+2. WHEN the sidebar is collapsed THEN the system SHALL show icon-only navigation
+3. WHEN on mobile devices THEN the system SHALL provide a hamburger menu for navigation
+4. WHEN navigating between sections THEN the system SHALL provide smooth transitions
+5. WHEN the sidebar state changes THEN the system SHALL maintain the state across page navigation
+
+### Requirement 5: User Authentication System
+
+**User Story:** As a system administrator, I want a secure custom authentication system, so that I can control access to the application and protect sensitive business data.
+
+#### Acceptance Criteria
+
+1. WHEN a user attempts to sign in THEN the system SHALL authenticate using username or email with password
+2. WHEN storing passwords THEN the system SHALL hash passwords securely
+3. WHEN managing sessions THEN the system SHALL implement proper session management
+4. WHEN authentication fails THEN the system SHALL display appropriate error messages
+5. WHEN authentication succeeds THEN the system SHALL redirect to the appropriate dashboard
+
+### Requirement 6: User Management and Access Control
+
+**User Story:** As a superadmin, I want to manage user accounts with different access levels, so that I can control who has access to what features in the system.
+
+#### Acceptance Criteria
+
+1. WHEN creating users THEN the system SHALL support three auth levels: 1=superadmin, 2=admin, 3=user
+2. WHEN an admin views users THEN the system SHALL hide superadmin accounts from admin users
+3. WHEN a superadmin views users THEN the system SHALL display all user accounts
+4. WHEN managing user status THEN the system SHALL support "active" and "inactive" status
+5. WHEN no admin users exist THEN the system SHALL allow access to the signup page
+6. WHEN admin users exist THEN the system SHALL restrict access to the signup page
+
+### Requirement 7: Customer Management
+
+**User Story:** As a business owner, I want to manage customer information, so that I can maintain records of vehicle owners and their contact details.
+
+#### Acceptance Criteria
+
+1. WHEN adding a customer THEN the system SHALL store customer contact information
+2. WHEN viewing customers THEN the system SHALL display a searchable list of all customers
+3. WHEN editing customer information THEN the system SHALL update records with proper validation
+4. WHEN deleting a customer THEN the system SHALL handle associated vehicle relationships appropriately
+5. WHEN creating a customer THEN the system SHALL validate required fields and uniqueness constraints
+
+### Requirement 7.1: Enhanced Customer Details View
+
+**User Story:** As a business owner, I want a comprehensive customer details view that shows all related information in one place, so that I can quickly access customer vehicles, maintenance history, and take relevant actions.
+
+#### Acceptance Criteria
+
+1. WHEN viewing a customer's details THEN the system SHALL display a redesigned "المعلومات الأساسية" (Basic Information) section with improved layout
+2. WHEN viewing customer details THEN the system SHALL show all vehicles owned by the customer
+3. WHEN clicking on a vehicle in the customer details THEN the system SHALL navigate to the vehicles page filtered by that specific vehicle's plate number
+4. WHEN viewing customer details THEN the system SHALL provide a "Show All Vehicles" button that opens the vehicles page filtered by the customer
+5. WHEN viewing customer details THEN the system SHALL display the latest 3 maintenance visits for the customer
+6. WHEN viewing customer details THEN the system SHALL provide a button to view all maintenance visits filtered by the customer
+7. WHEN no maintenance visits exist THEN the system SHALL display an appropriate message encouraging the first visit
+8. WHEN viewing vehicle information THEN the system SHALL show key details like plate number, manufacturer, model, and year
+9. WHEN viewing maintenance visit information THEN the system SHALL show visit date, maintenance type, cost, and payment status
+
+### Requirement 8: Vehicle Management
+
+**User Story:** As a business owner, I want to manage detailed vehicle information, so that I can track each vehicle's specifications and maintenance history.
+
+#### Acceptance Criteria
+
+1. WHEN adding a vehicle THEN the system SHALL store plate number, body type, manufacturer, model, year, transmission, fuel type, and use type
+2. WHEN entering vehicle details THEN the system SHALL provide dropdown lists for body type, transmission, and fuel type options
+3. WHEN saving a vehicle THEN the system SHALL ensure plate number uniqueness
+4. WHEN linking vehicles THEN the system SHALL associate each vehicle with a customer owner
+5. WHEN viewing vehicles THEN the system SHALL display last visit date and suggested next visit date
+6. WHEN editing vehicle information THEN the system SHALL update records with proper validation
+
+### Requirement 9: Maintenance Visit Management
+
+**User Story:** As a service technician, I want to record maintenance visits with detailed information, so that I can track what work was performed and when.
+
+#### Acceptance Criteria
+
+1. WHEN creating a maintenance visit THEN the system SHALL link the visit to a specific vehicle and customer
+2. WHEN recording visit details THEN the system SHALL store maintenance type, description, cost, and kilometers
+3. WHEN completing a visit THEN the system SHALL update the vehicle's last visit date to the current date
+4. WHEN setting next visit THEN the system SHALL calculate suggested next visit date based on selected delay period
+5. WHEN selecting visit delay THEN the system SHALL provide options for 1, 2, 3, and 4 months
+6. WHEN saving a visit THEN the system SHALL generate corresponding income records
+
+### Requirement 10: Financial Management
+
+**User Story:** As a business owner, I want to track expenses and income, so that I can monitor the financial performance of my maintenance business.
+
+#### Acceptance Criteria
+
+1. WHEN recording expenses THEN the system SHALL store expense details with proper categorization
+2. WHEN a maintenance visit is completed THEN the system SHALL automatically generate income records
+3. WHEN viewing financial data THEN the system SHALL provide summaries of income and expenses
+4. WHEN managing financial records THEN the system SHALL support full CRUD operations
+5. WHEN calculating totals THEN the system SHALL provide accurate financial reporting
+
+### Requirement 11: Data Validation and Error Handling
+
+**User Story:** As a user, I want proper validation and clear error messages, so that I can understand and correct any input errors quickly.
+
+#### Acceptance Criteria
+
+1. WHEN submitting forms THEN the system SHALL validate all required fields
+2. WHEN validation fails THEN the system SHALL display clear, localized error messages
+3. WHEN database operations fail THEN the system SHALL handle errors gracefully
+4. WHEN unique constraints are violated THEN the system SHALL provide specific error feedback
+5. WHEN network errors occur THEN the system SHALL provide appropriate user feedback
+
+### Requirement 12: Database Seeding and Initial Setup
+
+**User Story:** As a system administrator, I want the system to initialize with essential data, so that I can start using the application immediately after deployment.
+
+#### Acceptance Criteria
+
+1. WHEN the database is first created THEN the system SHALL seed one superadmin account
+2. WHEN seeding data THEN the system SHALL create essential system configuration data
+3. WHEN running seed scripts THEN the system SHALL handle existing data appropriately
+4. WHEN initializing THEN the system SHALL set up proper database relationships and constraints
--- a/.kiro/specs/car-maintenance-system/tasks.md
+++ b/.kiro/specs/car-maintenance-system/tasks.md
@@ -0,0 +1,201 @@
+# Implementation Plan
+
+- [x] 1. Set up project foundation and database schema
+
+
+
+
+
+  - Configure Prisma schema with all required models and relationships
+  - Set up database migrations and seed data
+  - Configure TypeScript types for all models
+  - _Requirements: 1.1, 1.2, 1.3, 12.1, 12.2, 12.3, 12.4_
+
+- [x] 2. Implement authentication system foundation
+
+
+
+
+
+  - Create session management utilities and middleware
+  - Implement password hashing and validation functions
+  - Create authentication helper functions and types
+  - _Requirements: 5.1, 5.2, 5.3, 5.4, 5.5_
+
+- [x] 3. Create authentication routes and forms
+
+
+
+
+
+  - Implement signin route with username/email login support
+  - Create signup route with conditional access control
+  - Build authentication form components with validation
+  - Implement proper error handling and user feedback
+  - _Requirements: 5.1, 5.4, 5.5, 6.5, 6.6, 11.1, 11.2, 11.4_
+
+- [x] 4. Set up RTL layout and Arabic language support
+
+
+
+
+  - Configure Tailwind CSS for RTL support and Arabic fonts
+  - Create base layout components with RTL orientation
+  - Implement responsive design utilities and breakpoints
+  - Test Arabic text rendering and layout behavior
+  - _Requirements: 2.1, 2.2, 2.3, 2.4, 3.1, 3.2, 3.3, 3.4_
+
+- [x] 5. Build dashboard layout and navigation system
+
+
+
+
+
+  - Create responsive sidebar navigation component
+  - Implement collapsible sidebar with icon-only mode
+  - Build mobile hamburger menu and responsive behavior
+  - Add smooth transitions and state persistence
+  - _Requirements: 4.1, 4.2, 4.3, 4.4, 4.5_
+
+- [x] 6. Implement route protection and access control
+
+
+
+
+
+  - Create route protection middleware for different auth levels
+  - Implement role-based access control logic
+  - Add automatic redirection for unauthorized access
+  - Test access control for all user types
+  - _Requirements: 6.1, 6.2, 6.3, 6.4_
+
+- [x] 7. Create user management system
+
+
+
+
+
+
+  - Build user listing page with role-based filtering
+  - Implement user creation, editing, and status management
+  - Create user deletion functionality with proper validation
+  - Add search and filtering capabilities for user management
+  - _Requirements: 6.1, 6.2, 6.3, 6.4, 7.1, 7.2, 7.3, 7.4, 7.5_
+
+- [x] 8. Implement customer management CRUD operations
+
+
+
+
+
+  - Create customer model and database operations
+  - Build customer listing page with search functionality
+  - Implement customer creation and editing forms
+  - Add customer deletion with relationship handling
+  - _Requirements: 7.1, 7.2, 7.3, 7.4, 7.5, 11.1, 11.2, 11.3_
+
+- [x] 9. Build vehicle management system
+
+
+
+
+
+  - Create vehicle model with all required fields and relationships
+  - Implement vehicle registration form with dropdown selections
+  - Build vehicle listing and search functionality
+  - Add vehicle editing and deletion capabilities
+  - _Requirements: 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 11.1, 11.2, 11.4_
+
+- [x] 10. Implement maintenance visit management
+
+
+
+
+
+  - Create maintenance visit model and database operations
+  - Build visit registration form with vehicle and customer linking
+  - Implement visit delay selection and next visit date calculation
+  - Add visit listing, editing, and deletion functionality
+  - _Requirements: 9.1, 9.2, 9.3, 9.4, 9.5, 9.6_
+
+- [x] 11. Create financial management system
+
+
+
+
+
+  - Implement expense management CRUD operations
+  - Build automatic income generation from maintenance visits
+  - Create financial reporting and summary views
+  - Add expense and income listing with filtering
+  - _Requirements: 10.1, 10.2, 10.3, 10.4, 10.5_
+
+- [x] 12. Build reusable form components and validation
+
+
+
+
+
+  - Create reusable form input components with RTL support
+  - Implement client-side and server-side validation
+  - Build data table components with Arabic text support
+  - Add pagination, sorting, and filtering utilities
+  - _Requirements: 11.1, 11.2, 11.3, 11.4, 11.5_
+
+
+
+
+
+- [x] 13. Enhance customer details view with comprehensive information display (note that i do not use dynamic page $... i use popup forms for update and view details)
+
+
+
+
+
+
+
+
+
+  - Redesign the "المعلومات الأساسية" (Basic Information) section with improved layout
+  - Display all customer vehicles with clickable navigation to filtered vehicle pages
+  - Add "Show All Vehicles" button that opens vehicles page filtered by customer
+  - Show latest 3 maintenance visits with key information (date, type, cost, payment status)
+  - Add "View All Visits" button that opens maintenance visits page filtered by customer
+  - Implement proper navigation with URL parameters for filtering
+  - Add responsive design for mobile and tablet views
+  - _Requirements: 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.1.6, 7.1.7, 7.1.8, 7.1.9_
+
+- [ ] 14. Implement comprehensive error handling
+  - Create global error boundary components
+  - Implement centralized error handling middleware
+  - Add proper error logging and user feedback
+  - Create Arabic error message translations
+  - _Requirements: 11.1, 11.2, 11.3, 11.4, 11.5_
+
+- [ ] 15. Add responsive design and mobile optimization
+  - Optimize all components for mobile devices
+  - Test and refine responsive breakpoints
+  - Implement touch-friendly interactions
+  - Verify RTL layout on all screen sizes
+  - _Requirements: 3.1, 3.2, 3.3, 3.4, 4.3, 4.4_
+
+- [ ] 16. Create database seeding and initial setup
+  - Implement database seed script with superadmin account
+  - Create essential system data initialization
+  - Add proper error handling for existing data
+  - Test database initialization and migration process
+  - _Requirements: 12.1, 12.2, 12.3, 12.4_
+
+- [ ] 17. Implement comprehensive testing suite
+  - Write unit tests for all business logic functions
+  - Create integration tests for API routes and database operations
+  - Add component tests for UI components
+  - Implement end-to-end tests for critical user journeys
+  - _Requirements: All requirements validation through testing_
+
+- [ ] 18. Final integration and system testing
+  - Test complete user workflows from authentication to data management
+  - Verify all CRUD operations work correctly with proper validation
+  - Test role-based access control across all features
+  - Validate Arabic language support and RTL layout throughout the system
+  - _Requirements: All requirements integration testing_