feat: 更新Swift助手样式规则和应用结构

- 在swift-assistant-style.mdc中添加项目背景、代码结构、命名规范、Swift最佳实践、UI开发、性能、安全性、测试与质量、核心功能、开发流程、App Store指南等详细规则。
- 在yanaApp.swift中将SplashView替换为Splash，简化应用结构。

yana/MVVM/Splash.swift

@@ -0,0 +1,182 @@
+import SwiftUI
+import Combine
+
+// MARK: - Splash ViewModel
+
+@MainActor
+class SplashViewModel: ObservableObject {
+    // MARK: - Published Properties
+    @Published var isLoading = true
+    @Published var shouldShowMainApp = false
+    @Published var authenticationStatus: UserInfoManager.AuthenticationStatus = .notFound
+    @Published var isCheckingAuthentication = false
+    @Published var navigationDestination: NavigationDestination?
+    
+    // MARK: - Private Properties
+    private var cancellables = Set<AnyCancellable>()
+    
+    // MARK: - Navigation Destination
+    enum NavigationDestination: Equatable {
+        case login
+        case main
+    }
+    
+    // MARK: - Initialization
+    init() {
+        setupBindings()
+    }
+    
+    // MARK: - Public Methods
+    func onAppear() {
+        isLoading = true
+        shouldShowMainApp = false
+        authenticationStatus = .notFound
+        isCheckingAuthentication = false
+        navigationDestination = nil
+        
+        // 1秒延迟后显示主应用
+        Task {
+            try await Task.sleep(nanoseconds: 1_000_000_000)
+            await MainActor.run {
+                self.splashFinished()
+            }
+        }
+    }
+    
+    func splashFinished() {
+        isLoading = false
+        checkAuthentication()
+    }
+    
+    func checkAuthentication() {
+        isCheckingAuthentication = true
+        
+        Task {
+            let authStatus = await UserInfoManager.checkAuthenticationStatus()
+            await MainActor.run {
+                self.authenticationChecked(authStatus)
+            }
+        }
+    }
+    
+    func authenticationChecked(_ status: UserInfoManager.AuthenticationStatus) {
+        isCheckingAuthentication = false
+        authenticationStatus = status
+        
+        if status.canAutoLogin {
+            debugInfoSync("🎉 自动登录成功，开始获取用户信息")
+            fetchUserInfo()
+        } else {
+            debugInfoSync("🔑 需要手动登录")
+            navigateToLogin()
+        }
+    }
+    
+    func fetchUserInfo() {
+        Task {
+            let success = await UserInfoManager.autoFetchUserInfoOnAppLaunch(apiService: LiveAPIService())
+            await MainActor.run {
+                self.userInfoFetched(success)
+            }
+        }
+    }
+    
+    func userInfoFetched(_ success: Bool) {
+        if success {
+            debugInfoSync("✅ 用户信息获取成功，进入主页")
+        } else {
+            debugInfoSync("⚠️ 用户信息获取失败，但仍进入主页")
+        }
+        navigateToMain()
+    }
+    
+    func navigateToLogin() {
+        navigationDestination = .login
+    }
+    
+    func navigateToMain() {
+        navigationDestination = .main
+        shouldShowMainApp = true
+    }
+    
+    // MARK: - Private Methods
+    private func setupBindings() {
+        // 可以在这里设置 Combine 绑定
+    }
+}
+
+// MARK: - Splash View
+
+struct Splash: View {
+    @StateObject private var viewModel = SplashViewModel()
+    
+    var body: some View {
+        ZStack {
+            Group {
+                // 根据导航目标显示不同页面
+                if let navigationDestination = viewModel.navigationDestination {
+                    switch navigationDestination {
+                    case .login:
+                        // 显示登录页面
+                        LoginPage(
+                            onLoginSuccess: {
+                                // 登录成功后导航到主页面
+                                viewModel.navigateToMain()
+                            }
+                        )
+                    case .main:
+                        // 显示主应用页面
+                        MainPage(
+                            onLogout: {
+                                viewModel.navigateToLogin()
+                            }
+                        )
+                    }
+                } else {
+                    // 显示启动画面
+                    splashContent
+                }
+            }
+            .onAppear {
+                viewModel.onAppear()
+            }
+            
+            // API Loading 效果视图 - 显示在所有内容之上
+            APILoadingEffectView()
+        }
+    }
+    
+    // 启动画面内容
+    private var splashContent: some View {
+        ZStack {
+            // 背景图片 - 全屏显示
+            LoginBackgroundView()
+            
+            VStack(spacing: 32) {
+                Spacer()
+                    .frame(height: 200) // 与 storyboard 中的约束对应
+                
+                // Logo 图片 - 100x100
+                Image("logo")
+                    .resizable()
+                    .aspectRatio(contentMode: .fit)
+                    .frame(width: 100, height: 100)
+                
+                // 应用标题 - 白色，40pt字体
+                Text(LocalizedString("splash.title", comment: "E-Parti"))
+                    .font(.system(size: 40, weight: .regular))
+                    .foregroundColor(.white)
+                
+                Spacer()
+            }
+        }
+    }
+}
+
+//#Preview {
+//    Splash()
+//}
+
+#Preview {
+    Splash()
+}