1.开始录制、结束录制增加

2. 增加电量检测、内存检查，是否低于 10%

test/core/platform/device_health_checker_test.dart

@@ -0,0 +1,88 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:recording_tool/core/platform/device_health_checker.dart';
+import 'package:recording_tool/core/platform/device_health_snapshot.dart';
+
+void main() {
+  group('DeviceHealthChecker.warningLines', () {
+    test('returns empty when battery and storage are healthy', () {
+      const snapshot = DeviceHealthSnapshot(
+        batteryLevelPercent: 50,
+        storageAvailablePercent: 50,
+      );
+
+      expect(DeviceHealthChecker.warningLines(snapshot), isEmpty);
+    });
+
+    test('returns low battery message only', () {
+      const snapshot = DeviceHealthSnapshot(
+        batteryLevelPercent: 9,
+        storageAvailablePercent: 50,
+      );
+
+      expect(
+        DeviceHealthChecker.warningLines(snapshot),
+        [DeviceHealthChecker.lowBatteryMessage],
+      );
+    });
+
+    test('returns low storage message only', () {
+      const snapshot = DeviceHealthSnapshot(
+        batteryLevelPercent: 50,
+        storageAvailablePercent: 9.9,
+      );
+
+      expect(
+        DeviceHealthChecker.warningLines(snapshot),
+        [DeviceHealthChecker.lowStorageMessage],
+      );
+    });
+
+    test('returns both messages when battery and storage are low', () {
+      const snapshot = DeviceHealthSnapshot(
+        batteryLevelPercent: 5,
+        storageAvailablePercent: 5,
+      );
+
+      expect(
+        DeviceHealthChecker.warningLines(snapshot),
+        [
+          DeviceHealthChecker.lowBatteryMessage,
+          DeviceHealthChecker.lowStorageMessage,
+        ],
+      );
+    });
+
+    test('does not warn at exactly threshold percent', () {
+      const snapshot = DeviceHealthSnapshot(
+        batteryLevelPercent: 10,
+        storageAvailablePercent: 10,
+      );
+
+      expect(DeviceHealthChecker.warningLines(snapshot), isEmpty);
+    });
+
+    test('skips battery warning when level is unknown', () {
+      const snapshot = DeviceHealthSnapshot(
+        batteryLevelPercent: null,
+        storageAvailablePercent: 5,
+      );
+
+      expect(
+        DeviceHealthChecker.warningLines(snapshot),
+        [DeviceHealthChecker.lowStorageMessage],
+      );
+    });
+  });
+
+  group('DeviceHealthSnapshot.fromMap', () {
+    test('parses native map fields', () {
+      final snapshot = DeviceHealthSnapshot.fromMap({
+        'batteryLevelPercent': 42,
+        'storageAvailablePercent': 12.5,
+      });
+
+      expect(snapshot.batteryLevelPercent, 42);
+      expect(snapshot.storageAvailablePercent, 12.5);
+    });
+  });
+}