feat: change to center and clean code

src/utils/extra.ts

@@ -1,16 +0,0 @@
-/**
- * 提取 {{}} 中的 key
- * @param text
- * @returns
- */
-export function extractKeysFromBraces(text: string) {
-  const regex = /\{\{\s*(.*?)\s*\}\}/g;
-  const keys: string[] = [];
-  let matches: RegExpExecArray | null;
-
-  while ((matches = regex.exec(text)) !== null) {
-    keys.push(matches[1]); // 获取{{}}中间的key
-  }
-
-  return keys;
-}