chore: 后端首次基线提交

运行必须源码：app/(controller/model/service/middleware/lib/utils/validate/router)、config/、database/(migrations/seeders/sql)、启动脚本、app/public/templates 模板。
已忽略运行非必须：node_modules/、logs/、run/、app/public 运行时上传数据、.env*、构建/缓存产物。

add_wx_link.js

@@ -0,0 +1,23 @@
+const mysql = require('mysql2/promise');
+(async () => {
+  const c = await mysql.createConnection({
+    host: 'localhost', user: 'root', password: '74191221', database: 'competition_db'
+  });
+  try {
+    await c.query("ALTER TABLE news ADD COLUMN wx_link VARCHAR(500) NULL DEFAULT NULL COMMENT '微信公众号文章链接' AFTER content");
+    console.log('Added wx_link column');
+  } catch (e) {
+    if (e.code === 'ER_DUP_FIELDNAME') console.log('wx_link already exists');
+    else throw e;
+  }
+  try {
+    await c.query("ALTER TABLE news ADD COLUMN news_type VARCHAR(20) NOT NULL DEFAULT 'content' COMMENT '新闻类型' AFTER wx_link");
+    console.log('Added news_type column');
+  } catch (e) {
+    if (e.code === 'ER_DUP_FIELDNAME') console.log('news_type already exists');
+    else throw e;
+  }
+  const [cols] = await c.query('SHOW COLUMNS FROM news');
+  cols.forEach(x => console.log(x.Field, x.Type, x.Null));
+  await c.end();
+})();