详情页释义增加搜索按钮，应用内打开 Google 搜索

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

LearnEnglish/LearnEnglish/Views/WordDetailViewController.swift

@@ -1,3 +1,4 @@
+import SafariServices
 import UIKit
 
 final class WordDetailViewController: UIViewController {
@@ -125,6 +126,20 @@ final class WordDetailViewController: UIViewController {
         meaningLabel.font = .preferredFont(forTextStyle: .title2)
         meaningLabel.numberOfLines = 0
 
+        var searchConfig = UIButton.Configuration.plain()
+        searchConfig.baseForegroundColor = Theme.Color.accent
+        searchConfig.image = UIImage(systemName: "magnifyingglass",
+                                     withConfiguration: UIImage.SymbolConfiguration(pointSize: 15, weight: .medium))
+        let searchButton = UIButton(type: .system)
+        searchButton.configuration = searchConfig
+        searchButton.addAction(UIAction { [weak self] _ in self?.searchMeaning() }, for: .touchUpInside)
+        searchButton.setContentHuggingPriority(.required, for: .horizontal)
+
+        let meaningRow = UIStackView(arrangedSubviews: [meaningLabel, searchButton])
+        meaningRow.axis = .horizontal
+        meaningRow.alignment = .top
+        meaningRow.spacing = 8
+
         let divider = HairlineView()
 
         let exampleTitle = makeCaption("例句")
@@ -154,7 +169,7 @@ final class WordDetailViewController: UIViewController {
         exampleRow.alignment = .top
         exampleRow.spacing = 8
 
-        let stack = UIStackView(arrangedSubviews: [meaningTitle, meaningLabel, divider, exampleTitle, exampleRow])
+        let stack = UIStackView(arrangedSubviews: [meaningTitle, meaningRow, divider, exampleTitle, exampleRow])
         stack.axis = .vertical
         stack.spacing = 16
         stack.setCustomSpacing(6, after: meaningTitle)
@@ -171,6 +186,13 @@ final class WordDetailViewController: UIViewController {
         return card
     }
 
+    private func searchMeaning() {
+        Haptics.selection()
+        guard let query = word.meaning.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed),
+              let url = URL(string: "https://www.google.com/search?q=\(query)") else { return }
+        present(SFSafariViewController(url: url), animated: true)
+    }
+
     private func makeCaption(_ text: String) -> UILabel {
         let label = UILabel()
         label.text = text