feat: Update screen management state handling for immediate updates

- Enhanced the screen management functionality to ensure that updates to selected screens are reflected immediately in the state.
- Implemented a mapping function to update the screens list when a screen's details are modified, improving user experience by providing real-time feedback.
- This change ensures that the UI remains in sync with the underlying data, enhancing the overall responsiveness of the application.

frontend/app/(main)/admin/screenMng/popScreenMngList/page.tsx

@@ -202,6 +202,13 @@ export default function PopScreenManagementPage() {
               ...selectedScreen,
               ...updatedFields,
             });
+            setScreens((prev) =>
+              prev.map((s) =>
+                s.screenId === selectedScreen.screenId
+                  ? { ...s, ...updatedFields }
+                  : s
+              )
+            );
           }}
         />
       </div>

frontend/app/(main)/admin/screenMng/screenMngList/page.tsx

@@ -130,12 +130,16 @@ export default function ScreenManagementPage() {
           selectedScreen={selectedScreen} 
           onBackToList={() => goToStep("list")} 
           onScreenUpdate={(updatedFields) => {
-            // 저장 후 화면 정보 즉시 업데이트 (테이블명 등)
             if (selectedScreen) {
-              setSelectedScreen({
-                ...selectedScreen,
-                ...updatedFields,
-              });
+              const updated = { ...selectedScreen, ...updatedFields };
+              setSelectedScreen(updated);
+              setScreens((prev) =>
+                prev.map((s) =>
+                  s.screenId === selectedScreen.screenId
+                    ? { ...s, ...updatedFields }
+                    : s
+                )
+              );
             }
           }}
         />