feat: reorganize admin settings with tabbed interface and documentation

- Reorganized admin settings into tabbed interface (General, Security, Payment Methods)
- Vertical tabs on desktop, horizontal scrollable on mobile
- Moved Payment Methods from separate menu to Settings tab
- Fixed admin profile reuse and dashboard blocking
- Fixed maintenance mode guard to use AppConfig model
- Added admin auto-redirect after login (admins → /admin, users → /)
- Reorganized documentation into docs/ folder structure
- Created comprehensive README and documentation index
- Added PWA and Web Push notifications to to-do list

README.md

@@ -0,0 +1,148 @@
+# Tabungin
+
+A modern financial tracking application built with React and NestJS.
+
+## 📚 Documentation
+
+Comprehensive documentation is available in the [`docs/`](./docs) folder:
+
+- **[Documentation Index](./docs/README.md)** - Start here for all documentation
+- **[Features](./docs/features/)** - Detailed feature documentation
+- **[Guides](./docs/guides/)** - How-to guides and tutorials
+- **[Planning](./docs/planning/)** - Roadmap and to-do list
+
+## 🚀 Quick Start
+
+### Prerequisites
+- Node.js 18+ 
+- PostgreSQL 14+
+- npm or yarn
+
+### Installation
+
+1. **Clone the repository**
+   ```bash
+   git clone <repository-url>
+   cd Tabungin
+   ```
+
+2. **Install dependencies**
+   ```bash
+   npm install
+   ```
+
+3. **Setup environment**
+   ```bash
+   # Copy environment files
+   cp apps/api/.env.example apps/api/.env
+   cp apps/web/.env.example apps/web/.env
+   
+   # Edit .env files with your configuration
+   ```
+
+4. **Setup database**
+   ```bash
+   cd apps/api
+   npx prisma migrate dev
+   npx prisma db seed
+   ```
+
+5. **Run development servers**
+   ```bash
+   # Terminal 1: API
+   cd apps/api
+   npm run dev
+
+   # Terminal 2: Web
+   cd apps/web
+   npm run dev
+   ```
+
+6. **Access the application**
+   - Web: http://localhost:5174
+   - API: http://localhost:3001
+
+## 🏗️ Project Structure
+
+```
+Tabungin/
+├── apps/
+│   ├── api/              # NestJS backend
+│   │   ├── src/
+│   │   │   ├── auth/     # Authentication
+│   │   │   ├── users/    # User management
+│   │   │   ├── wallets/  # Wallet management
+│   │   │   ├── transactions/
+│   │   │   └── admin/    # Admin features
+│   │   └── prisma/       # Database schema
+│   └── web/              # React frontend
+│       ├── src/
+│       │   ├── components/
+│       │   ├── contexts/
+│       │   ├── lib/
+│       │   └── utils/
+│       └── public/
+├── docs/                 # Documentation
+│   ├── features/         # Feature docs
+│   ├── guides/           # How-to guides
+│   └── planning/         # Roadmap & to-do
+└── README.md
+```
+
+## ✨ Features
+
+- 💰 **Wallet Management** - Multiple wallets with different currencies
+- 📊 **Transaction Tracking** - Income and expense tracking
+- 👤 **User Profiles** - Customizable user profiles with avatars
+- 🔐 **Multi-Factor Authentication** - Email, WhatsApp, and TOTP
+- 👥 **Admin Panel** - Comprehensive admin dashboard
+- 💳 **Subscription Plans** - Flexible subscription management
+- 💵 **Payment Processing** - Multiple payment methods
+- 🛡️ **Security** - JWT authentication, role-based access
+- 🌙 **Dark Mode** - Light and dark theme support
+- 🌍 **Multi-language** - English and Indonesian
+
+## 🔧 Tech Stack
+
+### Frontend
+- React 18
+- TypeScript
+- Vite
+- TailwindCSS
+- shadcn/ui
+- React Router
+- Axios
+
+### Backend
+- NestJS
+- TypeScript
+- Prisma ORM
+- PostgreSQL
+- JWT Authentication
+- Passport.js
+
+## 📖 Documentation
+
+- [Features Documentation](./docs/features/) - Detailed feature implementations
+- [Testing Guide](./docs/guides/testing-guide.md) - How to test the application
+- [To-Do List](./docs/planning/todo.md) - Upcoming features and tasks
+- [Technical Q&A](./docs/planning/tech-qa.md) - Technical decisions and answers
+
+## 🤝 Contributing
+
+1. Fork the repository
+2. Create a feature branch (`git checkout -b feature/amazing-feature`)
+3. Commit your changes (`git commit -m 'Add amazing feature'`)
+4. Push to the branch (`git push origin feature/amazing-feature`)
+5. Open a Pull Request
+
+## 📝 License
+
+This project is licensed under the MIT License.
+
+## 🆘 Support
+
+For questions or issues:
+- Check the [Documentation](./docs/README.md)
+- Review [Technical Q&A](./docs/planning/tech-qa.md)
+- Open an issue on GitHub