doc: add header to readme

Author: N-Choo

README.md

@@ -1,4 +1,26 @@
-# CoinBot.v3
+<div align="center">
+  <img src="https://capsule-render.vercel.app/api?type=waving&color=gradient&customColorList=2,3&height=180&section=header&text=CoinBot%20x%20KuCoin&fontSize=56&animation=fadeIn&fontAlignY=38" alt="CoinBot x KuCoin" />
+</div>
+
+<p align="center"><b>Automated crypto trading — signed contracts, on-chain deposits, signal-driven execution.</b></p>
+
+<div align="center">
+  <img src="https://img.shields.io/badge/Rust-000000?style=for-the-badge&logo=rust&logoColor=white" />
+  <img src="https://img.shields.io/badge/Actix--Web-2f2f2f?style=for-the-badge&logo=rust&logoColor=white" />
+  <img src="https://img.shields.io/badge/gRPC-Tonic-244c5a?style=for-the-badge&logo=grpc&logoColor=white" />
+  <img src="https://img.shields.io/badge/SQLx-336791?style=for-the-badge&logo=postgresql&logoColor=white" />
+  <img src="https://img.shields.io/badge/PostgreSQL-4169E1?style=for-the-badge&logo=postgresql&logoColor=white" />
+  <img src="https://img.shields.io/badge/Redis-DC382D?style=for-the-badge&logo=redis&logoColor=white" />
+  <img src="https://img.shields.io/badge/Python-3776AB?style=for-the-badge&logo=python&logoColor=white" />
+  <img src="https://img.shields.io/badge/React-61DAFB?style=for-the-badge&logo=react&logoColor=black" />
+  <img src="https://img.shields.io/badge/TypeScript-3178C6?style=for-the-badge&logo=typescript&logoColor=white" />
+  <img src="https://img.shields.io/badge/Tailwind-06B6D4?style=for-the-badge&logo=tailwindcss&logoColor=white" />
+  <img src="https://img.shields.io/badge/Docker-2496ED?style=for-the-badge&logo=docker&logoColor=white" />
+  <img src="https://img.shields.io/badge/KuCoin-24b47e?style=for-the-badge&logo=kucoin&logoColor=white" />
+  <img src="https://img.shields.io/badge/Ethereum-3C3C3D?style=for-the-badge&logo=ethereum&logoColor=white" />
+</div>
+
+<br />
 
 **CoinBot.v3** is an event-driven crypto trading platform that turns user-signed contracts into automated trades on KuCoin futures. Users authenticate with an Ethereum wallet, deposit USDT on-chain, and sign a contract allocating funds to a strategy; a Rust **trade engine** consumes RSI-divergence signals from a Python **analyzer** and executes them, while an **API gateway** and **deposit worker** handle wallet auth, contract signing, and on-chain deposit verification.