fix：第一轮跑

lib/features/settings/application/update_foreground_service.dart

@@ -0,0 +1,36 @@
+import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+import 'update_controller.dart';
+import 'update_service.dart';
+
+/// 前后台切换仅低频检查一次，网络失败或无新版本均静默结束。
+abstract final class UpdateForegroundService {
+  static DateTime? _lastCheck;
+  static Future<void>? _running;
+  static Future<void> check(BuildContext context, WidgetRef ref) {
+    final now = DateTime.now();
+    if (_lastCheck != null &&
+        now.difference(_lastCheck!) < const Duration(minutes: 30)) {
+      return Future.value();
+    }
+    return _running ??= _run(context, ref).whenComplete(() => _running = null);
+  }
+
+  static Future<void> _run(BuildContext context, WidgetRef ref) async {
+    _lastCheck = DateTime.now();
+    try {
+      final info = await ref
+          .read(updateControllerProvider.notifier)
+          .checkUpgrade();
+      if (context.mounted) {
+        await UpdateService.showIfNeeded(
+          context,
+          ref,
+          info,
+          source: UpgradeCheckSource.automatic,
+        );
+      }
+    } catch (_) {}
+  }
+}