feat: 新增注销帐号功能以增强用户交互体验

- 在APIEndpoints中新增注销帐号的API路径。
- 在AppSettingFeature中添加showDeactivateAccount状态和相关动作，支持注销帐号的逻辑。
- 在AppSettingView中整合注销帐号的视图逻辑，新增注销帐号行和绑定。
- 在Localizable.strings中添加英文和中文的注销帐号文本支持。

yana/Views/AppSettingView.swift

@@ -113,6 +113,9 @@ struct AppSettingView: View {
         .sheet(isPresented: privacyPolicyBinding(viewStore: viewStore)) {
             WebView(url: APIConfiguration.webURL(for: .privacyPolicy)!)
         }
+        .sheet(isPresented: deactivateAccountBinding(viewStore: viewStore)) {
+            WebView(url: APIConfiguration.webURL(for: .deactivateAccount)!)
+        }
     }
 
     @ViewBuilder
@@ -304,6 +307,7 @@ struct AppSettingView: View {
             helpRow(viewStore: viewStore)
             clearCacheRow(viewStore: viewStore)
             checkUpdatesRow(viewStore: viewStore)
+            deactivateAccountRow(viewStore: viewStore)
             aboutUsRow(viewStore: viewStore)
         }
         .background(Color.clear)
@@ -342,6 +346,14 @@ struct AppSettingView: View {
         )
     }
 
+    // MARK: - 注销帐号行
+    private func deactivateAccountRow(viewStore: ViewStoreOf<AppSettingFeature>) -> some View {
+        settingRow(
+            title: NSLocalizedString("appSetting.deactivateAccount", comment: "Deactivate Account"),
+            action: { viewStore.send(.deactivateAccountTapped) }
+        )
+    }
+
     // MARK: - 关于我们行
     private func aboutUsRow(viewStore: ViewStoreOf<AppSettingFeature>) -> some View {
         settingRow(
@@ -404,6 +416,14 @@ struct AppSettingView: View {
         )
     }
 
+    // MARK: - 注销帐号绑定
+    private func deactivateAccountBinding(viewStore: ViewStoreOf<AppSettingFeature>) -> Binding<Bool> {
+        viewStore.binding(
+            get: \.showDeactivateAccount,
+            send: AppSettingFeature.Action.deactivateAccountDismissed
+        )
+    }
+
     // MARK: - 昵称Alert内容
     @ViewBuilder
     private func nicknameAlertContent(viewStore: ViewStoreOf<AppSettingFeature>) -> some View {