feat(ui):移除HRV计算后的时间间隔判断

@@ -14,7 +14,6 @@ import '../../pigeon/health_kit_api.g.dart';
 import '../../pigeon/health_kit_raw_data_api.g.dart';
 import '../config/app_environment_config.dart';
 import '../logging/app_logger.dart';
-import '../util/app_toast.dart';
 import 'health_raw_local_notification.dart';
 import 'health_raw_stress_calculator.dart';
 import 'health_sleep_calculator.dart';
@@ -281,8 +280,6 @@ class HealthRawDataCoreService {
     final latestSleepResultTime = await _localStore.latestSleepResultTime(
       userId,
     );
-    final isFirstCalculation =
-        hrvContextStart == null && realtimeContextStart == null;
     final hrvStartTime = math.max(
       hrvContextStart ?? requestedStartTime,
       earliestStartTime,
@@ -382,7 +379,7 @@ class HealthRawDataCoreService {
     );
     await _sendLocalNotificationsAfterCalculation(
       result: storedResult,
-      previousHrvRawEndTime: latestHrvRawEndTime,
+      hasExistingHrv: latestHrvRawEndTime != null,
     );
     final calculateFinishedAt = DateTime.now();
     _logInfo(
@@ -393,7 +390,7 @@ class HealthRawDataCoreService {
 
   Future<void> _sendLocalNotificationsAfterCalculation({
     required HealthRawStressCalculationResult result,
-    required int? previousHrvRawEndTime,
+    required bool hasExistingHrv,
   }) async {
     if (result.hrvStressPoints.isEmpty &&
         result.realtimeStressPoints.isEmpty &&
@@ -420,7 +417,7 @@ class HealthRawDataCoreService {
       );
       final notifications = HealthRawLocalNotificationBuilder(l10n).build(
         result: result,
-        previousHrvRawEndTime: previousHrvRawEndTime,
+        hasExistingHrv: hasExistingHrv,
         realtimeWindow: realtimeWindow,
         record: record,
       );

@@ -37,7 +37,6 @@ enum HealthRawLocalNotificationRecordType {
 class HealthRawLocalNotificationBuilder {
   const HealthRawLocalNotificationBuilder(this.l10n);
 
-  static const int _hrvMinIntervalSeconds = 2 * 60 * 60;
   static const int _realtimeWindowSeconds = 60 * 60;
   static const int _realtimeMinPointCount = 10;
 
@@ -45,18 +44,14 @@ class HealthRawLocalNotificationBuilder {
 
   List<HealthRawLocalNotification> build({
     required HealthRawStressCalculationResult result,
-    required int? previousHrvRawEndTime,
+    required bool hasExistingHrv,
     required List<HealthRawRealtimeStressPoint> realtimeWindow,
     required HealthRawLocalNotificationRecord? record,
   }) {
     return [
       if (_sleepNotification(result.sleepResults) case final notification?)
         notification,
-      if (_hrvNotification(
-        result.hrvStressPoints,
-        previousHrvRawEndTime,
-        record,
-      )
+      if (_hrvNotification(result.hrvStressPoints, hasExistingHrv, record)
           case final notification?)
         notification,
       if (_realtimeStressNotification(realtimeWindow, record)
@@ -85,20 +80,14 @@ class HealthRawLocalNotificationBuilder {
 
   HealthRawLocalNotification? _hrvNotification(
     List<HealthRawHrvStressPoint> hrvPoints,
-    int? previousHrvRawEndTime,
+    bool hasExistingHrv,
     HealthRawLocalNotificationRecord? record,
   ) {
+    if (!hasExistingHrv) return null;
     if (hrvPoints.isEmpty) return null;
     final sorted = [...hrvPoints]
       ..sort((a, b) => a.rawEndTime.compareTo(b.rawEndTime));
     final latest = sorted.last;
-    final previousTime = sorted.length >= 2
-        ? sorted[sorted.length - 2].rawEndTime
-        : previousHrvRawEndTime;
-    if (previousTime == null ||
-        latest.rawEndTime - previousTime < _hrvMinIntervalSeconds) {
-      return null;
-    }
     if (record?.lastHrvTime == latest.rawEndTime) return null;
 
     return HealthRawLocalNotification(

@@ -26,7 +26,7 @@ void main() {
           ),
         ],
       ),
-      previousHrvRawEndTime: null,
+      hasExistingHrv: false,
       realtimeWindow: const [],
       record: const HealthRawLocalNotificationRecord(),
     );
@@ -37,7 +37,7 @@ void main() {
     expect(notifications.single.link, healthRawTodayLink);
   });
 
-  test('builds hrv notification when previous hrv is at least two hours away',
+  test('builds hrv notification when new hrv is calculated after first run',
       () {
     final latestTime = _seconds(DateTime(2026, 1, 1, 10));
     final notifications = builder.build(
@@ -49,7 +49,7 @@ void main() {
         realtimeStressPoints: const [],
         dailyStressPoints: const [],
       ),
-      previousHrvRawEndTime: latestTime - Duration.secondsPerHour * 2,
+      hasExistingHrv: true,
       realtimeWindow: const [],
       record: const HealthRawLocalNotificationRecord(),
     );
@@ -59,7 +59,7 @@ void main() {
     expect(notifications.single.link, healthRawHrvChangeLink);
   });
 
-  test('skips hrv notification when previous hrv is too close', () {
+  test('skips hrv notification on first calculation without existing hrv', () {
     final latestTime = _seconds(DateTime(2026, 1, 1, 10));
     final notifications = builder.build(
       result: HealthRawStressCalculationResult(
@@ -70,7 +70,7 @@ void main() {
         realtimeStressPoints: const [],
         dailyStressPoints: const [],
       ),
-      previousHrvRawEndTime: latestTime - Duration.secondsPerHour * 2 + 1,
+      hasExistingHrv: false,
       realtimeWindow: const [],
       record: const HealthRawLocalNotificationRecord(),
     );
@@ -87,7 +87,7 @@ void main() {
         realtimeStressPoints: [_realtimePoint(base + 9 * 300, 70)],
         dailyStressPoints: const [],
       ),
-      previousHrvRawEndTime: null,
+      hasExistingHrv: false,
       realtimeWindow: [
         for (var i = 0; i < 10; i++) _realtimePoint(base + i * 300, 70),
       ],
@@ -111,7 +111,7 @@ void main() {
         ],
         dailyStressPoints: const [],
       ),
-      previousHrvRawEndTime: null,
+      hasExistingHrv: false,
       realtimeWindow: [
         for (var i = 0; i < 9; i++) _realtimePoint(base + i * 300, 70),
         _realtimePoint(base + 9 * 300, 70, isSleepLikely: true),