docs: sync localized READMEs and feature assets

Author: warren618

README.md

@@ -87,10 +87,11 @@
 
 ## ✨ Key Features
 
-<table width="100%">
+<div align="center">
+<table align="center" width="94%" style="width:94%; margin-left:auto; margin-right:auto;">
   <tr>
     <td align="center" width="50%" valign="top">
-      <img src="assets/scene-research.png" height="130" alt="Self-improving trading agent"/><br>
+      <img src="assets/feature-self-improving-trading-agent.png" height="130" alt="Self-improving trading agent"/><br>
       <h3>🔍 Self-Improving Trading Agent</h3>
       <div align="left">
         • Natural-language market research<br>
@@ -99,7 +100,7 @@
       </div>
     </td>
     <td align="center" width="50%" valign="top">
-      <img src="assets/scene-swarm.png" height="130" alt="Multi-agent trading teams"/><br>
+      <img src="assets/feature-multi-agent-trading-teams.png" height="130" alt="Multi-agent trading teams"/><br>
       <h3>🐝 Multi-Agent Trading Teams</h3>
       <div align="left">
         • Investment, quant, crypto, and risk teams<br>
@@ -110,7 +111,7 @@
   </tr>
   <tr>
     <td align="center" width="50%" valign="top">
-      <img src="assets/scene-backtest.png" height="130" alt="Cross-market data and backtesting"/><br>
+      <img src="assets/feature-cross-market-data-backtesting.png" height="130" alt="Cross-market data and backtesting"/><br>
       <h3>📊 Cross-Market Data & Backtesting</h3>
       <div align="left">
         • A/HK/US equities, crypto, futures, and forex<br>
@@ -119,8 +120,8 @@
       </div>
     </td>
     <td align="center" width="50%" valign="top">
-      <img src="assets/scene-quant.png" height="130" alt="Trade journal and strategy audit"/><br>
-      <h3>👥 Trade Journal & Strategy Audit</h3>
+      <img src="assets/feature-shadow-account.png" height="130" alt="Shadow Account"/><br>
+      <h3>👥 Shadow Account</h3>
       <div align="left">
         • Broker-journal behavior diagnostics<br>
         • Rule-based Shadow Account comparisons<br>
@@ -129,6 +130,7 @@
     </td>
   </tr>
 </table>
+</div>
 
 ## 💡 What Is Vibe-Trading?