同步 Android 启动页到 iOS，并在冷启动期间静默恢复登录态。

新增 SplashView、SplashCoordinator 与 Launch Screen 资源，移除冷启动 Lottie；LoginView 加载 App 配置。同时将 token 存储迁移至 UserDefaults，并更新相关测试与文档。

Co-authored-by: Cursor <cursoragent@cursor.com>

suixinkan.xcodeproj/project.pbxproj

@@ -64,11 +64,15 @@
 		};
 		A00000022FE9000000000002 /* suixinkanTests */ = {
 			isa = PBXFileSystemSynchronizedRootGroup;
+			exceptions = (
+			);
 			path = suixinkanTests;
 			sourceTree = "<group>";
 		};
 		B00000022FEF000000000002 /* suixinkanUITests */ = {
 			isa = PBXFileSystemSynchronizedRootGroup;
+			exceptions = (
+			);
 			path = suixinkanUITests;
 			sourceTree = "<group>";
 		};
@@ -324,14 +328,10 @@
 			inputFileListPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-suixinkan/Pods-suixinkan-resources-${CONFIGURATION}-input-files.xcfilelist",
 			);
-			inputPaths = (
-			);
 			name = "[CP] Copy Pods Resources";
 			outputFileListPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-suixinkan/Pods-suixinkan-resources-${CONFIGURATION}-output-files.xcfilelist",
 			);
-			outputPaths = (
-			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
 			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-suixinkan/Pods-suixinkan-resources.sh\"\n";