fix: unexpected empty lines when copying-pasting (#1654)

web/src/components/MemoList.tsx

@@ -8,6 +8,7 @@ import { DEFAULT_MEMO_LIMIT } from "@/helpers/consts";
 import { checkShouldShowMemoWithFilters } from "@/helpers/filter";
 import Memo from "./Memo";
 import "@/less/memo-list.less";
+import copy from "copy-to-clipboard";
 
 const MemoList = () => {
   const { t } = useTranslation();
@@ -148,6 +149,21 @@ const MemoList = () => {
     }
   };
 
+  useEffect(() => {
+    window.addEventListener("copy", handleCopy);
+    return () => {
+      window.removeEventListener("copy", handleCopy);
+    };
+  }, []);
+
+  const handleCopy = (event: ClipboardEvent) => {
+    event.preventDefault();
+    const rawStr = document.getSelection()?.toString();
+    if (rawStr !== undefined) {
+      copy(rawStr.split("\n\n").join("\n"));
+    }
+  };
+
   return (
     <div className="memo-list-container">
       {sortedMemos.map((memo) => (