fix: 배터리 최적화 제외 요청 (Doze 면제, 삼성 대응)

- BLE 연결 시 REQUEST_IGNORE_BATTERY_OPTIMIZATIONS 다이얼로그 표시
- 이미 제외 상태면 스킵
- Manifest에 REQUEST_IGNORE_BATTERY_OPTIMIZATIONS 권한 추가

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/AndroidManifest.xml

@@ -31,6 +31,7 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
 
     <!-- BLE feature -->
     <uses-feature android:name="android.hardware.bluetooth_le" android:required="true" />

app/src/main/java/com/example/medilightv2android/services/BleForegroundService.kt

@@ -29,6 +29,9 @@ class BleForegroundService : Service() {
         const val ACTION_STOP = "com.example.medilightv2android.BLE_STOP"
 
         fun start(context: Context) {
+            // 배터리 최적화 제외 요청 (Doze 면제)
+            requestBatteryOptimizationExemption(context)
+
             val intent = Intent(context, BleForegroundService::class.java).apply {
                 action = ACTION_START
             }
@@ -39,6 +42,22 @@ class BleForegroundService : Service() {
             }
         }
 
+        @android.annotation.SuppressLint("BatteryLife")
+        private fun requestBatteryOptimizationExemption(context: Context) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                val pm = context.getSystemService(Context.POWER_SERVICE) as PowerManager
+                if (!pm.isIgnoringBatteryOptimizations(context.packageName)) {
+                    try {
+                        val intent = Intent(android.provider.Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS).apply {
+                            data = android.net.Uri.parse("package:${context.packageName}")
+                            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                        }
+                        context.startActivity(intent)
+                    } catch (_: Exception) {}
+                }
+            }
+        }
+
         fun stop(context: Context) {
             val intent = Intent(context, BleForegroundService::class.java).apply {
                 action = ACTION_STOP