feat: cow desktop first version

desktop/README.md

@@ -0,0 +1,81 @@
+# CowAgent Desktop
+
+Cross-platform desktop client for CowAgent, built with Electron + React + TypeScript.
+
+## Development
+
+### Prerequisites
+
+- Node.js 18+
+- npm or yarn
+- Python 3.7+ (for the backend)
+
+### Setup
+
+```bash
+cd desktop
+npm install
+```
+
+### Run in Development
+
+Start the renderer dev server and Electron together:
+
+```bash
+npm run dev
+```
+
+Or run them separately:
+
+```bash
+# Terminal 1: Start Vite dev server
+npm run dev:renderer
+
+# Terminal 2: Start Electron (after renderer is ready)
+npm run dev:main
+```
+
+The app will automatically start the Python backend from the parent directory.
+
+### Build
+
+```bash
+# Build for current platform
+npm run dist
+
+# Build for macOS only
+npm run dist:mac
+
+# Build for Windows only
+npm run dist:win
+```
+
+Build outputs are placed in the `release/` directory.
+
+## Architecture
+
+```
+desktop/
+├── src/
+│   ├── main/              # Electron main process
+│   │   ├── index.ts       # Window management, IPC
+│   │   ├── python-manager.ts  # Python backend lifecycle
+│   │   └── preload.ts     # Context bridge for renderer
+│   └── renderer/          # React UI (Vite)
+│       └── src/
+│           ├── api/       # HTTP client for backend APIs
+│           ├── components/ # Reusable UI components
+│           ├── hooks/     # React hooks
+│           ├── pages/     # Page components
+│           └── types.ts   # TypeScript types
+├── resources/             # App icons
+├── package.json           # Dependencies and build config
+└── vite.config.ts         # Vite config
+```
+
+### How it Works
+
+1. Electron main process starts and creates the app window
+2. It spawns the Python backend (`app.py`) as a child process
+3. The React UI communicates with the Python backend via HTTP APIs
+4. SSE (Server-Sent Events) is used for streaming chat responses and live logs