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;
 			};

FlipClockSaver/FlipClockSaver-Bridging-Header.h

@@ -1,4 +0,0 @@
-//
-//  Use this file to import your target's public headers that you would like to expose to Swift.
-//
-

FlipClockSaver/FlipClockSaverView.swift

@@ -126,24 +126,42 @@ final class FlipClockSaverView: ScreenSaverView {
         refreshInfo()
     }
 
-    override var animationTimeInterval: TimeInterval {
-        get { 1.0 / 60 }
-        set {}
-    }
+    // 刷新率自适应：翻页动画进行中用 60fps 保证流畅；静止时自动降频省电。
+    // 显示秒时仍需逐秒检测是否跨秒，空闲降到 0.1s（10fps，检测延迟≤0.1s 不可见）；
+    // 关闭秒显示后只在整分翻动，空闲可降到 1.0s 进一步省电。
+    private static let animFrameInterval: TimeInterval = 1.0 / 60.0
+    private static let idleFrameInterval: TimeInterval = 0.1
+    private static let idleNoSecondsFrameInterval: TimeInterval = 1.0
 
     override func animateOneFrame() {
         let now = CACurrentMediaTime()
         frameTime = now
         let comps = Calendar.current.dateComponents([.hour, .minute, .second], from: Date())
         let key = (comps.hour ?? 0) * 3600 + (comps.minute ?? 0) * 60 + (comps.second ?? 0)
-        if key != lastKey {
+        let keyChanged = key != lastKey
+        if keyChanged {
             lastKey = key
             update(animated: true, at: now)
         }
+        let wasAnimating = digits.contains { $0.isAnimating }
         for d in digits { d.advance(to: now) }
+        let isAnimating = digits.contains { $0.isAnimating }
+        let justFinished = wasAnimating && !isAnimating
         syncSettingsIfNeeded(now: now)
+
+        // 自适应刷新率：动画进行中保持 60fps；静止时降到低频省电
+        let desired = isAnimating
+            ? Self.animFrameInterval
+            : (showSeconds ? Self.idleFrameInterval : Self.idleNoSecondsFrameInterval)
+        if abs(animationTimeInterval - desired) > 0.0001 {
+            animationTimeInterval = desired
+        }
+
+        // 仅在“跨秒 / 动画中 / 动画刚结束”时才重绘，彻底静止时不触发整屏重绘
+        if keyChanged || isAnimating || justFinished {
             setNeedsDisplay(bounds)
         }
+    }
 
     // 轮询兜底：即使通知未送达（如跨进程/模块缓存），也能在约 0.5 秒内同步设置
     private func syncSettingsIfNeeded(now: TimeInterval) {

FlipClockSaver/FlipDigit.swift

@@ -27,6 +27,9 @@ final class FlipDigit {
         }
     }
 
+    /// 是否正处于翻页动画中（供视图判断是否需要高刷新率）
+    var isAnimating: Bool { animating }
+
     func draw(in ctx: CGContext,
               rect: CGRect,
               radius: CGFloat,