更新睡眠的心率基准图不显示

lib/pages/sleep_report/chart/SnoreChart.dart

@@ -214,7 +214,7 @@ class BarChartPainter extends CustomPainter {
       // 缓存 tip 信息
       if (selectedBar == d) {
         tipText =
-            '${d.name}\n${d.value.toStringAsFixed(1)}\n${MyUtils.formatToHHmm(d.st)}';
+            '${d.name}\n${d.value.toStringAsFixed(1)}次\n${MyUtils.formatToHHmm(d.st)}';
 
         final tp = TextPainter(
           text: TextSpan(

lib/pages/sleep_report/chart/TimeSeriesChart.dart

@@ -84,9 +84,28 @@ class TimeSeriesChart extends StatelessWidget {
     final xLabels = _generateXLabels();
     final midY = (yMin + yMax) / 2;
 
-    List<FlSpot> spots = dataPoints.map((p) {
-      return FlSpot(_timeToX(p.timestamp.toDouble(), xLabels), p.value);
-    }).toList();
+    // 将数据点分割成多个连续段，遇到value=-1时断开
+    List<List<FlSpot>> lineSegments = [];
+    List<FlSpot> currentSegment = [];
+
+    for (var point in dataPoints) {
+      if (point.value != -1) {
+        // 有效数据点，添加到当前段
+        currentSegment.add(FlSpot(
+          _timeToX(point.timestamp.toDouble(), xLabels),
+          point.value,
+        ));
+      } else if (currentSegment.isNotEmpty) {
+        // 遇到无效点且当前段不为空，结束当前段
+        lineSegments.add(currentSegment);
+        currentSegment = [];
+      }
+    }
+
+    // 添加最后一个段（如果有）
+    if (currentSegment.isNotEmpty) {
+      lineSegments.add(currentSegment);
+    }
 
     return AspectRatio(
       aspectRatio: 2,
@@ -204,15 +223,16 @@ class TimeSeriesChart extends StatelessWidget {
               top: BorderSide.none,
             ),
           ),
-          lineBarsData: [
-            LineChartBarData(
-              spots: spots,
+          lineBarsData: lineSegments.map((segment) {
+            return LineChartBarData(
+              spots: segment,
               isCurved: false,
               color: themeController.currentColor.sc2,
               barWidth: 2,
               dotData: FlDotData(show: false),
-            )
-          ],
+              preventCurveOverShooting: true,
+            );
+          }).toList(),
         ),
       ),
     );