feat: 增强FeedListFeature和MeFeature的首次加载逻辑

- 在FeedListFeature和MeFeature中新增isFirstLoad状态，确保仅在首次加载时请求数据。
- 更新MainView以简化视图切换逻辑，使用isHidden修饰符控制视图显示。
- 新增View+isHidden扩展，提供视图隐藏功能，提升代码可读性和复用性。

yana/Features/FeedListFeature.swift

@@ -5,6 +5,7 @@ import ComposableArchitecture
 struct FeedListFeature {
     @Dependency(\.apiService) var apiService
     struct State: Equatable {
+        var isFirstLoad: Bool = true
         var feeds: [Feed] = [] // 预留 feed 内容
         var isLoading: Bool = false
         var error: String? = nil
@@ -35,9 +36,8 @@ struct FeedListFeature {
     func reduce(into state: inout State, action: Action) -> Effect<Action> {
         switch action {
         case .onAppear:
-            // 只在首次加载时请求 feed 数据
-            guard !state.isLoaded else { return .none }
-            state.isLoaded = true
+            guard state.isFirstLoad else { return .none }
+            state.isFirstLoad = false
             return .send(.fetchFeeds)
         case .reload:
             // 下拉刷新，重置状态并请求第一页

yana/Features/MainFeature.swift

@@ -103,10 +103,10 @@ struct MainFeature: Reducer {
             }
         }
         // 设置页作用域
-        .ifLet(\ .settingState, action: /Action.settingAction) {
+        .ifLet(\ .settingState, action: \.settingAction) {
             SettingFeature()
         }
-        .ifLet(\ .appSettingState, action: /Action.appSettingAction) {
+        .ifLet(\ .appSettingState, action: \.appSettingAction) {
             AppSettingFeature()
         }
     }

yana/Features/MeFeature.swift

@@ -5,6 +5,7 @@ import ComposableArchitecture
 struct MeFeature {
     @Dependency(\.apiService) var apiService
     struct State: Equatable {
+        var isFirstLoad: Bool = true
         var userInfo: UserInfo?
         var isLoadingUserInfo: Bool = false
         var userInfoError: String?
@@ -32,17 +33,9 @@ struct MeFeature {
     func reduce(into state: inout State, action: Action) -> Effect<Action> {
         switch action {
         case .onAppear:
-            guard state.uid > 0 else { return .none }
-            state.isLoadingUserInfo = true
-            state.isLoadingMoments = true
-            state.userInfoError = nil
-            state.momentsError = nil
-            state.page = 1
-            state.hasMore = true
-            return .merge(
-                fetchUserInfo(uid: state.uid),
-                fetchMoments(uid: state.uid, page: 1, pageSize: state.pageSize)
-            )
+            guard state.isFirstLoad else { return .none }
+            state.isFirstLoad = false
+            return .send(.refresh)
         case .refresh:
             guard state.uid > 0 else { return .none }
             state.isRefreshing = true

yana/Views/Components/View+isHidden.swift

@@ -0,0 +1,12 @@
+import SwiftUI
+
+extension View {
+    @ViewBuilder
+    func isHidden(_ hidden: Bool) -> some View {
+        if hidden {
+            self.opacity(0).allowsHitTesting(false)
+        } else {
+            self
+        }
+    }
+} 

yana/Views/MainView.swift

@@ -18,22 +18,18 @@ struct MainView: View {
                             .ignoresSafeArea(.all)
                         // 主内容
                         ZStack {
-                            switch viewStore.selectedTab {
-                            case .feed:
                             FeedListView(store: store.scope(
                                 state: \.feedList,
                                 action: \.feedList
                             ))
-                                    .transition(.opacity)
-                            case .other:
+                            .isHidden(viewStore.selectedTab != .feed)
                             MeView(
                                 store: store.scope(
                                     state: \.me,
                                     action: \.me
                                 )
                             )
-                                .transition(.opacity)
-                            }
+                            .isHidden(viewStore.selectedTab != .other)
                         }
                         .frame(maxWidth: .infinity, maxHeight: .infinity)
                         // 测试按钮