feat: 移除设置功能并优化主功能状态管理

- 从HomeFeature和MainFeature中移除设置相关状态和逻辑，简化状态管理。
- 更新视图以去除设置页面的展示，提升用户体验。
- 删除SettingFeature及其相关视图，减少冗余代码，增强代码可维护性。

yana/Features/MainFeature.swift

@@ -14,7 +14,6 @@ struct MainFeature: Reducer {
         var accountModel: AccountModel? = nil
         // 新增：导航路径和设置页面 State
         var navigationPath: [Destination] = []
-        var settingState: SettingFeature.State? = nil
         var appSettingState: AppSettingFeature.State? = nil
         // 新增：登出标志
         var isLoggedOut: Bool = false
@@ -22,7 +21,6 @@ struct MainFeature: Reducer {
     
     // 新增：导航目标
     enum Destination: Hashable, Equatable {
-        case setting
         case test
         case appSetting
     }
@@ -36,8 +34,6 @@ struct MainFeature: Reducer {
         case accountModelLoaded(AccountModel?)
         // 新增：导航相关
         case navigationPathChanged([Destination])
-        case settingButtonTapped
-        case settingAction(SettingFeature.Action)
         case testButtonTapped
         case appSettingButtonTapped
         case appSettingAction(AppSettingFeature.Action)
@@ -84,20 +80,11 @@ struct MainFeature: Reducer {
                 return .none
             case .navigationPathChanged(let newPath):
                 // pop 回来时清空 settingState
-                if !newPath.contains(.setting) {
-                    state.settingState = nil
-                }
                 if !newPath.contains(.appSetting) {
                     state.appSettingState = nil
                 }
                 state.navigationPath = newPath
                 return .none
-            case .settingButtonTapped:
-                state.settingState = SettingFeature.State()
-                state.navigationPath.append(.setting)
-                return .none
-            case .settingAction:
-                return .none
             case .testButtonTapped:
                 state.navigationPath.append(.test)
                 return .none
@@ -117,9 +104,6 @@ struct MainFeature: Reducer {
             }
         }
         // 设置页作用域
-        .ifLet(\ .settingState, action: \.settingAction) {
-            SettingFeature()
-        }
         .ifLet(\ .appSettingState, action: \.appSettingAction) {
             AppSettingFeature()
         }