매매 시그널 디테일 팝업 기능 적용

frontend/src/components/AppPopup.tsx

@@ -30,6 +30,7 @@ export interface AppPopupProps {
   headerExtra?: React.ReactNode;
   footer?: React.ReactNode;
   initialPosition?: { x: number; y: number };
+  bodyRef?: React.Ref<HTMLDivElement>;
 }
 
 export const AppPopup: React.FC<AppPopupProps> = ({
@@ -53,6 +54,7 @@ export const AppPopup: React.FC<AppPopupProps> = ({
   headerExtra,
   footer,
   initialPosition,
+  bodyRef,
 }) => {
   const accentGlow = accentColor === APP_POPUP_ACCENT
     ? APP_POPUP_ACCENT_GLOW
@@ -130,7 +132,7 @@ export const AppPopup: React.FC<AppPopupProps> = ({
             ✕
           </button>
         </div>
-        <div className={bodyClassName}>{children}</div>
+        <div ref={bodyRef} className={bodyClassName}>{children}</div>
         {footer}
       </div>
     </div>