[feat] @everyone 이 첫줄 이어도 title로 사용하지 않습니다.

src/main/java/space/space_spring/domain/discord/adapter/in/discord/TitleAndContentParser.java

@@ -8,6 +8,7 @@
 public class TitleAndContentParser {
     private String title;
     private String content;
+    private static final String EVERYONE_MENTION = "@everyone";
 
     private TitleAndContentParser(String title,String content){
         this.title=title;
@@ -25,7 +26,7 @@ public static TitleAndContentParser parse(String input){
         int index = 0;
 
         // 첫 줄이 비어있으면 다음 줄로 이동
-        while (index < lines.length && lines[index].isBlank()) {
+        while (index < lines.length && !validateTitle(lines[index])) {
             index++;
         }
 
@@ -40,5 +41,20 @@ public static TitleAndContentParser parse(String input){
         return new TitleAndContentParser(title,content);
     }
 
+    private static boolean validateTitle(String line){
+        if(line.isEmpty()||line.isBlank()){return false;}
+        if(line.trim().equalsIgnoreCase(EVERYONE_MENTION)){return false;}
 
+        return true;
+    }
+
+    private static String deleteMention(String input){
+        if(input==null){
+            return null;
+        }
+        if(input.contains(EVERYONE_MENTION)){
+            return input.replace(EVERYONE_MENTION, "");
+        }
+        return input;
+    }
 }