feat: Add language navigation links to all README files

- Add prominent language selection section at the top of each README
- Include flag emojis and clear language indicators (🇨🇳 中文, 🇺🇸 English, 🇪🇸 Español)
- Format as horizontal table for easy scanning and navigation
- Show current language with arrow indicator (← Current/当前/Actual)
- Use relative links that work on both GitHub and local repositories
- Improve discoverability of multilingual documentation
- Consistent navigation across all three language versions

README.md

@@ -1,5 +1,17 @@
 # 🔥 MediaCrawler - 自媒体平台爬虫 🕷️
 
+## 🌐 Language / 语言 / Idioma
+
+<div align="center">
+
+| 🇨🇳 中文 | 🇺🇸 English | 🇪🇸 Español |
+|---------|----------|----------|
+| **[中文文档](README.md)** ← 当前 | **[English](README_en.md)** | **[Español](README_es.md)** |
+
+</div>
+
+---
+
 <div align="center">
 
 <a href="https://trendshift.io/repositories/8291" target="_blank">

README_en.md

@@ -1,5 +1,17 @@
 # 🔥 MediaCrawler - Social Media Platform Crawler 🕷️
 
+## 🌐 Language / 语言 / Idioma
+
+<div align="center">
+
+| 🇨🇳 中文 | 🇺🇸 English | 🇪🇸 Español |
+|---------|----------|----------|
+| **[中文文档](README.md)** | **[English](README_en.md)** ← Current | **[Español](README_es.md)** |
+
+</div>
+
+---
+
 <div align="center">
 
 <a href="https://trendshift.io/repositories/8291" target="_blank">

README_es.md

@@ -1,5 +1,17 @@
 # 🔥 MediaCrawler - Rastreador de Plataformas de Redes Sociales 🕷️
 
+## 🌐 Language / 语言 / Idioma
+
+<div align="center">
+
+| 🇨🇳 中文 | 🇺🇸 English | 🇪🇸 Español |
+|---------|----------|----------|
+| **[中文文档](README.md)** | **[English](README_en.md)** | **[Español](README_es.md)** ← Actual |
+
+</div>
+
+---
+
 <div align="center">
 
 <a href="https://trendshift.io/repositories/8291" target="_blank">