🔨 refactor: useCheckTextLines 훅 분리

src/hooks/useCheckTextLines.tsx

@@ -0,0 +1,31 @@
+import { useState, useEffect, useCallback, RefObject } from 'react';
+
+const useCheckTextLines = (
+  textContainerRef: RefObject<HTMLDivElement>,
+  text: string,
+): boolean => {
+  const [showButton, setShowButton] = useState(false);
+
+  const checkTextLines = useCallback(() => {
+    if (textContainerRef.current) {
+      const element = textContainerRef.current;
+      const lineHeight = parseFloat(
+        window.getComputedStyle(element).lineHeight,
+      );
+      const lines = element.scrollHeight / lineHeight;
+      setShowButton(lines > 3.5);
+    }
+  }, [textContainerRef]);
+
+  useEffect(() => {
+    if (textContainerRef.current) {
+      checkTextLines();
+      window.addEventListener('resize', checkTextLines);
+      return () => window.removeEventListener('resize', checkTextLines);
+    }
+  }, [text, textContainerRef, checkTextLines]);
+
+  return showButton;
+};
+
+export default useCheckTextLines;