feat: 로딩 인디케이터에 딜레이 적용

src/Projects/BKDesign/Sources/Components/BKLoading/BKLoadingIndicator.swift

@@ -1,37 +1,48 @@
 // Copyright © 2025 Booket. All rights reserved
 
-import UIKit
 import SnapKit
+import UIKit
 
 public final class LoadingIndicator {
 
     private static let tag = 999999
+    private static var delayedWorkItem: DispatchWorkItem?
 
     /// 로딩 인디케이터 보여주기
-    public static func show() {
+    public static func show(
+        delay: TimeInterval = 0.5
+    ) {
         DispatchQueue.main.async {
-            guard let window = getKeyWindow() else { return }
-
-            if window.viewWithTag(tag) != nil {
-                return
+            guard delayedWorkItem == nil else { return }
+
+            let workItem = DispatchWorkItem {
+                defer { delayedWorkItem = nil }
+                guard Self.delayedWorkItem?.isCancelled != true else { return }
+                guard let window = getKeyWindow() else { return }
+                guard window.viewWithTag(tag) == nil else { return }
+
+                let loadingIndicatorView = createLoadingView(frame: window.bounds)
+                loadingIndicatorView.tag = tag
+                window.addSubview(loadingIndicatorView)
+                loadingIndicatorView.startAnimating()
             }
-
-            let loadingIndicatorView = createLoadingView(frame: window.bounds)
-            loadingIndicatorView.tag = tag
-
-            window.addSubview(loadingIndicatorView)
-            loadingIndicatorView.startAnimating()
+
+            delayedWorkItem = workItem
+            DispatchQueue.main.asyncAfter(deadline: .now() + delay, execute: workItem)
         }
     }
 
     /// 로딩 인디케이터 숨기기
     public static func hide() {
         DispatchQueue.main.async {
+            delayedWorkItem?.cancel()
+            delayedWorkItem = nil
+
             guard let window = getKeyWindow() else { return }
 
-            window.subviews.filter({ $0.tag == tag }).forEach {
-                $0.removeFromSuperview()
-            }
+            window.subviews
+                .filter{ $0.tag == tag }
+                .forEach { $0.removeFromSuperview() }
         }
     }
 

src/Projects/BKPresentation/Sources/MainFlow/NoteCompletion/View/NoteCompletionViewController.swift

@@ -60,7 +60,6 @@ final class NoteCompletionViewController: BaseViewController<NoteCompletionView>
             }
             .store(in: &cancellable)
 
-
         viewModel.statePublisher
             .map { $0.isLoading }
             .removeDuplicates()
@@ -77,18 +76,8 @@ final class NoteCompletionViewController: BaseViewController<NoteCompletionView>
         viewModel.statePublisher
             .receive(on: DispatchQueue.main)
             .compactMap { $0.error }
-            .sink { [weak self] error in
-                // 에러 알림 표시 -> BKStyle로 교체 필요
-                let alert = UIAlertController(
-                    title: "오류",
-                    message: "기록을 불러올 수 없습니다.",
-                    preferredStyle: .alert
-                )
-                alert.addAction(UIAlertAction(title: "확인", style: .default) { _ in
-                    self?.viewModel.send(.errorHandled)
-                    self?.dismiss(animated: true)
-                })
-                self?.present(alert, animated: true)
+            .sink { [weak self] _ in
+                self?.presentErrorDialog()
             }
             .store(in: &cancellable)
 
@@ -175,6 +164,22 @@ final class NoteCompletionViewController: BaseViewController<NoteCompletionView>
         present(dialogViewController, animated: true)
     }
 
+    func presentErrorDialog() {
+        let dialog = BKDialog(
+            title: "오류",
+            config: .init(
+                leftButtonTitle: "기록을 불러올 수 없습니다.",
+                leftButtonAction: { [weak self] in
+                    self?.dismiss(animated: true) { [weak self] in
+                        self?.viewModel.send(.errorHandled)
+                    }
+                }
+            )
+        )
+        let dialogViewController = BKDialogViewController(dialog: dialog)
+        self.present(dialogViewController, animated: true)
+    }
+
     @objc private func customBackButtonTapped() {
         dismiss(animated: true)
     }