feat: initial implementation of Light Chat app with React, Capacitor, and comprehensive tests

README.md

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+# Light Chat
+
+A lightweight Android chat application built with React and Capacitor for connecting to locally or remotely hosted LLMs.
+
+## Features
+
+- **LLM API Integration**: Connect to any OpenAI-compatible API endpoint
+- **Session Management**: Multiple chat sessions with add/remove functionality
+- **Dark Theme**: Sleek black/dark UI design
+- **Conversation Export**: Save chats as text, log, or markdown files
+- **Custom System Prompts**: Inject your own system prompts for personalized interactions
+- **Offline Ready**: Capacitor wrapper for native Android APK generation
+
+## Tech Stack
+
+- **Frontend**: React (Web)
+- **Mobile Wrapper**: Capacitor
+- **Build Tool**: Vite (recommended) or Create React App
+- **Testing**: Jest / React Testing Library
+- **Android Studio**: For final APK generation
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js (v18+)
+- npm or yarn
+- Android Studio (for APK building)
+- Capacitor CLI
+
+### Installation
+
+```bash
+# Install dependencies
+npm install
+
+# Start development server
+npm run dev
+```
+
+### Build for Android
+
+```bash
+# Build the web app
+npm run build
+
+# Sync with Capacitor
+npx cap sync
+
+# Open in Android Studio
+npx cap open android
+```
+
+## Project Structure
+
+The codebase follows these principles:
+
+- **Simple**: Keep things straightforward
+- **Modular**: Separate concerns into distinct modules
+- **Reusable**: Abstract common functionality
+- **Tested**: Unit tests for all components
+
+## Contributing
+
+When adding features:
+1. Look for existing similar functions to abstract
+2. Write unit tests
+3. Keep components small and focused
+4. Follow the modular architecture