详情页移除入场动画、标题显示分类名，汉选英播放按钮选答后才显示

LearnEnglish/LearnEnglish/Views/WordDetailViewController.swift

@@ -2,16 +2,17 @@ import UIKit
 
 final class WordDetailViewController: UIViewController {
     private let word: Word
+    private let categoryName: String
     private let speech = SpeechService.shared
 
     private let speakButton = UIButton(type: .system)
     private let exampleSpeakButton = UIButton(type: .system)
     private let contentStack = UIStackView()
     private var speechObserver: NSObjectProtocol?
-    private var didAnimateEntry = false
 
-    init(word: Word) {
+    init(word: Word, categoryName: String = "") {
         self.word = word
+        self.categoryName = categoryName
         super.init(nibName: nil, bundle: nil)
     }
 
@@ -27,7 +28,7 @@ final class WordDetailViewController: UIViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         view.backgroundColor = .systemBackground
-        title = word.word
+        title = categoryName
         navigationItem.largeTitleDisplayMode = .never
         buildLayout()
         updateSpeakState()
@@ -38,14 +39,6 @@ final class WordDetailViewController: UIViewController {
         }
     }
 
-    override func viewDidAppear(_ animated: Bool) {
-        super.viewDidAppear(animated)
-        if !didAnimateEntry {
-            didAnimateEntry = true
-            contentStack.animateEntry(distance: 16, duration: 0.35)
-        }
-    }
-
     private func updateSpeakState() {
         let wordSpeaking = speech.isSpeaking(word.word)
         speakButton.configuration?.image = UIImage(