优化：刷新率自适应省电 + 删除空桥接头

- 刷新率自适应：
  * 翻页动画进行中保持 60fps 保证流畅；静止时自动降频
  * 显示秒时空闲降到 0.1s(10fps，跨秒检测延迟≤0.1s 不可见)
  * 关闭秒显示后空闲降到 1.0s 进一步省电
  * 静止且无变化时跳过整屏重绘(setNeedsDisplay)，仅保留低频轮询
- 删除空的 FlipClockSaver-Bridging-Header.h，并移除 pbxproj 中
  SWIFT_OBJC_BRIDGING_HEADER 与 membershipExceptions 相关引用
  （项目无 Obj-C 代码，桥接头多余）
- Release 构建 BUILD SUCCEEDED，Developer ID 正式签名 + 验证通过

FlipClockSaver.xcodeproj/project.pbxproj

@@ -10,22 +10,9 @@
 		7B3DB23F3022DC2F00B3B568 /* FlipClockSaver.saver */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = FlipClockSaver.saver; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
-/* Begin PBXFileSystemSynchronizedBuildFileExceptionSet section */
-		7B3DB24E3022DC6000B3B568 /* Exceptions for "FlipClockSaver" folder in "FlipClockSaver" target */ = {
-			isa = PBXFileSystemSynchronizedBuildFileExceptionSet;
-			membershipExceptions = (
-				"FlipClockSaver-Bridging-Header.h",
-			);
-			target = 7B3DB23E3022DC2F00B3B568 /* FlipClockSaver */;
-		};
-/* End PBXFileSystemSynchronizedBuildFileExceptionSet section */
-
 /* Begin PBXFileSystemSynchronizedRootGroup section */
 		7B3DB2413022DC2F00B3B568 /* FlipClockSaver */ = {
 			isa = PBXFileSystemSynchronizedRootGroup;
-			exceptions = (
-				7B3DB24E3022DC6000B3B568 /* Exceptions for "FlipClockSaver" folder in "FlipClockSaver" target */,
-			);
 			path = FlipClockSaver;
 			sourceTree = "<group>";
 		};
@@ -275,7 +262,6 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_OBJC_BRIDGING_HEADER = "FlipClockSaver/FlipClockSaver-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 6.0;
 				WRAPPER_EXTENSION = saver;
@@ -303,7 +289,6 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_OBJC_BRIDGING_HEADER = "FlipClockSaver/FlipClockSaver-Bridging-Header.h";
 				SWIFT_VERSION = 6.0;
 				WRAPPER_EXTENSION = saver;
 			};