fix 点击倒计时按钮才整点对齐，而不是每次循环倒计时都对齐

lib/pages/timer/timer_page.dart

@@ -217,6 +217,36 @@ class _TimerPageState extends State<TimerPage> with WidgetsBindingObserver {
     });
   }
 
+  /// Handle timer completion
+  Future<void> _timerCompleted() async {
+    setState(() {
+      timerState = TimerState.finish;
+    });
+
+    // Play sound and vibrate
+    if (_settings.vibrate) {
+      _audioManager.triggerVibration();
+    }
+    _audioManager.playSound(_settings.sound, _settings.volume, _settings.loop);
+    
+    // If loop is enabled, restart the timer
+    if (_settings.loop) {
+      Future.delayed(Duration(seconds: 5), () {
+        _audioManager.stopSound();
+        _audioManager.stopVibration();
+      });
+      
+      // 不再检查是否需要整点对齐，直接启动倒计时
+      setState(() {
+        timerState = TimerState.running;
+        _remainingSeconds = _hours * 3600 + _minutes * 60 + _seconds;
+        _totalDurationSeconds = _remainingSeconds;
+      });
+      
+      _backgroundTimerService.startTimer(_remainingSeconds);
+    }
+  }
+
   /// Start a new timer or resume an existing paused timer
   void _startTimer(String status) {
     if (status == "resume") {
@@ -239,7 +269,7 @@ class _TimerPageState extends State<TimerPage> with WidgetsBindingObserver {
       _minutes = _minutestmp;
       _seconds = _secondstmp;
       
-      // 检查是否需要整点对齐
+      // 检查是否需要整点对齐 - 只有在初始启动时才检查
       if (_settings.alignToHour && _settings.loop && totalSeconds >= 600) { // 只有在循环模式、时间至少10分钟时才启用整点对齐
         _startTimerWithAlignment(totalSeconds);
       } else {
@@ -256,18 +286,14 @@ class _TimerPageState extends State<TimerPage> with WidgetsBindingObserver {
       final totalSeconds = _hours * 3600 + _minutes * 60 + _seconds;
       if (totalSeconds <= 0) return;
       
-      // 检查是否需要整点对齐
-      if (_settings.alignToHour && _settings.loop && totalSeconds >= 600) { // 只有在循环模式、时间至少10分钟时才启用整点对齐
-        _startTimerWithAlignment(totalSeconds);
-      } else {
-        setState(() {
-          timerState = TimerState.running;
-          _remainingSeconds = totalSeconds;
-          _totalDurationSeconds = totalSeconds;
-        });
-        
-        _backgroundTimerService.startTimer(totalSeconds);
-      }
+      // 直接启动倒计时，不再检查是否需要整点对齐
+      setState(() {
+        timerState = TimerState.running;
+        _remainingSeconds = totalSeconds;
+        _totalDurationSeconds = totalSeconds;
+      });
+      
+      _backgroundTimerService.startTimer(totalSeconds);
     }
   }
 
@@ -303,28 +329,6 @@ class _TimerPageState extends State<TimerPage> with WidgetsBindingObserver {
     });
   }
 
-  /// Handle timer completion
-  Future<void> _timerCompleted() async {
-    setState(() {
-      timerState = TimerState.finish;
-    });
-
-    // Play sound and vibrate
-    if (_settings.vibrate) {
-      _audioManager.triggerVibration();
-    }
-    _audioManager.playSound(_settings.sound, _settings.volume, _settings.loop);
-    
-    // If loop is enabled, restart the timer
-    if (_settings.loop) {
-      Future.delayed(Duration(seconds: 5), () {
-        _audioManager.stopSound();
-        _audioManager.stopVibration();
-      });
-      _startTimer("loop");
-    }
-  }
-
   String _formatTime(int seconds) {
     final hours = seconds ~/ 3600;
     final minutes = (seconds % 3600) ~/ 60;