feat: 优化视图组件与数据迁移逻辑

- 移除DataMigrationManager类，简化数据迁移逻辑。
- 在FeedListView和MeView中新增图片预览功能，提升用户体验。
- 更新OptimizedDynamicCardView以支持图片点击回调，增强交互性。
- 新增PreviewItem结构体以管理图片预览状态，提升代码可读性与维护性。
- 清理AppDelegate中的冗余代码，优化启动流程。

yana/Features/MainFeature.swift

@@ -50,8 +50,6 @@ struct MainFeature {
             MeFeature()
         }
         Reduce { state, action in
-            debugInfoSync("MainFeature action: \(action)")
-            debugInfoSync("MainFeature state: \(state)")
             switch action {
             case .onAppear:
                 return .run { send in
@@ -84,7 +82,6 @@ struct MainFeature {
                 let nickname = userInfo?.nick ?? ""
                 state.appSettingState = AppSettingFeature.State(nickname: nickname, avatarURL: avatarURL, userInfo: userInfo)
                 state.navigationPath.append(.appSetting)
-                debugInfoSync("\(state.navigationPath)")
                 return .none
             case .me:
                 return .none