feat: 修复MainView Tab切换问题并优化MeView逻辑

- 新增MainView Tab切换问题分析文档，详细描述问题原因及解决方案。
- 优化BottomTabView的绑定逻辑，简化状态管理，确保Tab切换时状态正确更新。
- 在MeView中实现用户信息加载逻辑调整，确保动态列表仅在首次进入时加载，并添加错误处理视图。
- 创建EmptyStateView组件，提供统一的空状态展示和重试功能。
- 增强调试信息输出，便于后续问题排查和用户体验提升。

yana/Views/MeView.swift

@@ -84,6 +84,7 @@ struct MeView: View {
                 debugInfoSync("   动态数量: \(store.moments.count)")
                 debugInfoSync("   用户信息错误: \(store.userInfoError ?? "nil")")
                 debugInfoSync("   动态错误: \(store.momentsError ?? "nil")")
+                debugInfoSync("   显示错误视图: \(store.showErrorView)")
                 store.send(.onAppear)
             }
             // 新增：图片预览弹窗
@@ -97,19 +98,19 @@ struct MeView: View {
                 get: { store.showDetail },
                 set: { _ in store.send(.detailDismissed) }
             )) {
-                if let selectedMoment = store.selectedMoment {
-                    let detailStore = Store(
-                        initialState: DetailFeature.State(moment: selectedMoment)
-                    ) {
-                        DetailFeature()
-                    }
-                    
-                    DetailView(store: detailStore)
-                        .onChange(of: detailStore.shouldDismiss) { _, shouldDismiss in
-                            if shouldDismiss {
-                                store.send(.detailDismissed)
-                            }
+            if let selectedMoment = store.selectedMoment {
+                let detailStore = Store(
+                    initialState: DetailFeature.State(moment: selectedMoment)
+                ) {
+                    DetailFeature()
+                }
+                
+                DetailView(store: detailStore)
+                    .onChange(of: detailStore.shouldDismiss) { _, shouldDismiss in
+                        if shouldDismiss {
+                            store.send(.detailDismissed)
                         }
+                    }
                 }
             }
         }
@@ -165,12 +166,12 @@ struct MeView: View {
                         .padding(.top, 8)
                 }
                 .frame(maxWidth: .infinity, maxHeight: .infinity)
-            } else if let error = store.userInfoError ?? store.momentsError {
+            } else if let error = store.userInfoError {
                 VStack(spacing: 12) {
                     Image(systemName: "exclamationmark.triangle")
                         .font(.system(size: 32))
                         .foregroundColor(.orange)
-                    Text("加载失败")
+                    Text("用户信息加载失败")
                         .font(.system(size: 16, weight: .medium))
                         .foregroundColor(.white)
                     Text(error)
@@ -179,7 +180,7 @@ struct MeView: View {
                         .multilineTextAlignment(.center)
                         .padding(.horizontal, 32)
                     Button("重试") {
-                        store.send(.refresh)
+                        store.send(.loadUserInfo)
                     }
                     .font(.system(size: 14, weight: .medium))
                     .foregroundColor(.white)
@@ -189,6 +190,12 @@ struct MeView: View {
                     .cornerRadius(8)
                 }
                 .frame(maxWidth: .infinity, maxHeight: .infinity)
+            } else if store.showErrorView {
+                // 显示错误视图组件
+                EmptyStateView {
+                    store.send(.retryMoments)
+                }
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
             } else if store.moments.isEmpty {
                 VStack(spacing: 12) {
                     Image(systemName: "doc.text")
@@ -213,6 +220,9 @@ struct MeView: View {
                     Text("调试: momentsError = \(store.momentsError ?? "nil")")
                         .font(.system(size: 12))
                         .foregroundColor(.yellow)
+                    Text("调试: showErrorView = \(store.showErrorView)")
+                        .font(.system(size: 12))
+                        .foregroundColor(.yellow)
                 }
                 .frame(maxWidth: .infinity, maxHeight: .infinity)
             } else {