docs(zh): sync README.zh with English README (tagline, why section, support pitch)

Author: snakewa

README.md

@@ -2,6 +2,8 @@
 
 English | [中文说明](README.zh.md)
 
+Free online SQL to JSON/Table converter – paste SQL, get JSON or HTML instantly.
+
 A lightweight web tool to convert SQL INSERT statements into JSON and a rendered HTML table. Supports multiple statements, schema inference from CREATE TABLE, inline validation, JSON previews, downloads, and more.
 
 Note: This is a 100% client-side web app (pure HTML/JS). It requires no backend and works perfectly on GitHub Pages.
@@ -17,6 +19,22 @@ Note: This is a 100% client-side web app (pure HTML/JS). It requires no backend
 
 - URL: https://snakewa.github.io/html5-sql-insert-tools/
 
+## Why 
+
+- Zero setup: paste SQL, convert directly in the browser. No DB server required.
+- Multiple outputs: JSON for APIs, HTML tables for reports/dashboards.
+- Easy updates: generate UPDATE statements from selected rows for quick fixes.
+- Education-friendly: visualize how SQL maps to JSON/HTML.
+- Offline-ready: pure HTML5/JavaScript, runs anywhere, ideal for GitHub Pages.
+
+## Support (Buy Me a Coffee)
+
+Hi! I built this free tool to quickly turn SQL into JSON or HTML tables. If it saved you time, consider buying me a coffee—your support helps me improve and add features!
+
+<a href="https://www.buymeacoffee.com/snakewa" target="_blank">
+  <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" height="48" width="173">
+  </a>
+
 ## Features
 
 - Robust parsing of `INSERT INTO ... VALUES (...), (...);` across multiple tables
@@ -112,11 +130,3 @@ Use the app locally without any server:
 ## License
 
 MIT
-
-## Support
-
-If this tool helps you, consider buying me a coffee ☕️
-
-<a href="https://www.buymeacoffee.com/snakewa" target="_blank">
-  <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" height="48" width="173">
-  </a>

README.zh.md

@@ -2,6 +2,8 @@
 
 [English README](README.md) | 中文说明
 
+免费在线 SQL 转 JSON/表格 转换器 —— 粘贴 SQL，立即得到 JSON 或 HTML。
+
 一个轻量级 Web 工具，用于将 SQL INSERT 语句转换为 JSON 与可视化 HTML 表格。支持多语句、从 CREATE TABLE 推断列名、内联校验、JSON 预览、下载等功能。
 
 说明：本项目为 100% 纯前端（纯 HTML/JS），无需后端，适合 GitHub Pages 静态托管。
@@ -17,6 +19,22 @@
 
 - 网址：<https://snakewa.github.io/html5-sql-insert-tools/>
 
+## 为什么
+
+- 零配置：直接在浏览器粘贴 SQL 并转换，无需数据库服务器。
+- 多种输出：面向 API 的 JSON，或用于报表/看板的 HTML 表格。
+- 快速更新：从所选行生成 UPDATE 语句，便于小范围修正数据。
+- 适合教学：直观展示 SQL 如何映射为 JSON/HTML。
+- 离线可用：纯 HTML5/JavaScript，适合 GitHub Pages，本地也能运行。
+
+## 支持（Buy Me a Coffee）
+
+我做这个免费工具是为了更快地把 SQL 转成 JSON 或 HTML 表格。如果它帮你节省了时间，欢迎请我喝杯咖啡，你的支持能帮助我继续改进与开发新功能！
+
+<a href="https://www.buymeacoffee.com/snakewa" target="_blank">
+  <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" height="48" width="173">
+</a>
+
 ## 功能特点
 
 - 可靠解析 `INSERT INTO ... VALUES (...), (...);`，支持多表多语句
@@ -113,10 +131,4 @@ INSERT INTO products VALUES
 
 MIT
 
-## 支持
-
-如果这个工具对你有帮助，欢迎请我喝杯咖啡 ☕️
-
-<a href="https://www.buymeacoffee.com/snakewa" target="_blank">
-  <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" height="48" width="173">
-</a>
+