feat(event): 이벤트 상세 딥링크와 OneLink를 연결한다

work/tests/AppDeepLinkGiftDetailCheck.swift

@@ -11,6 +11,7 @@ enum AppStep: Equatable {
     case message
     case audition
     case giftDetail(applicationNo: String)
+    case eventDetail(eventId: Int)
 }
 
 enum UserDefaultsKey { case userId }
@@ -24,10 +25,22 @@ final class AppState {
     var rootStep: AppStep = .main
     var pendingDeepLinkAction: AppDeepLinkAction?
     var appliedStep: AppStep?
+    var appStep: AppStep { appliedStep ?? rootStep }
     var isPushRoomFromDeepLink = false
     var pushRoomId = 0
     var pendingCommentPostId: Int?
-    func setAppStep(step: AppStep) { appliedStep = step }
+    func setAppStep(
+        step: AppStep,
+        ifCurrentStep matches: ((AppStep) -> Bool)? = nil,
+        completion: @escaping () -> Void = {}
+    ) {
+        defer { completion() }
+        guard matches?(appStep) ?? true else { return }
+        appliedStep = step
+    }
+    func requestExternalNavigation(navigationAction: @escaping () -> Void, cancelAction: @escaping () -> Void) {
+        navigationAction()
+    }
     func setPendingCommunityCommentDeepLink(creatorId: Int, postId: Int) { pendingCommentPostId = postId }
     func clearPendingCommunityCommentDeepLink() { pendingCommentPostId = nil }
 }