fix(download): align native metadata preparation and ReplayGain support

android/app/src/main/kotlin/com/zarz/spotiflac/NativeDownloadFinalizer.kt

@@ -1269,11 +1269,11 @@ object NativeDownloadFinalizer {
     }
 
     private fun replayGainDurationSeconds(input: FinalizeInput): Double {
-        val duration = input.request.optInt("duration_ms", 0).let {
-            if (it > 0) it else trackInt(input, "duration", 0)
-        }
-        if (duration <= 0) return 1.0
-        return if (duration > 10000) duration / 1000.0 else duration.toDouble()
+        val duration = NativeFinalizationPolicy.durationMilliseconds(
+            input.request.optLong("duration_ms", 0L),
+            trackInt(input, "duration", 0).toLong(),
+        )
+        return if (duration > 0L) duration / 1000.0 else 1.0
     }
 
     private fun buildHistoryRow(input: FinalizeInput, state: FinalizeState): ContentValues {

android/app/src/main/kotlin/com/zarz/spotiflac/NativeFinalizationPolicy.kt

@@ -11,6 +11,11 @@ import kotlin.math.roundToInt
  * finalizer's I/O-heavy orchestration.
  */
 internal object NativeFinalizationPolicy {
+    fun durationMilliseconds(requestMilliseconds: Long, trackSeconds: Long): Long {
+        if (requestMilliseconds > 0) return requestMilliseconds
+        return trackSeconds.coerceIn(0, Long.MAX_VALUE / 1000) * 1000
+    }
+
     fun resolvedAlbumRelativeDirectory(
         relativeDirectory: String,
         albumFolderTemplate: String,

android/app/src/main/kotlin/com/zarz/spotiflac/NativeFinalizerMedia.kt

@@ -245,9 +245,7 @@ internal fun NativeDownloadFinalizer.resolveLyricsLrc(context: Context, input: N
 internal fun NativeDownloadFinalizer.lyricsDurationMs(input: NativeDownloadFinalizer.FinalizeInput): Long {
     val requestDuration = input.request.optLong("duration_ms", 0L)
     val trackDuration = trackInt(input, "duration", 0).toLong()
-    val duration = if (requestDuration > 0L) requestDuration else trackDuration
-    if (duration <= 0L) return 0L
-    return if (duration > 10000L) duration else duration * 1000L
+    return NativeFinalizationPolicy.durationMilliseconds(requestDuration, trackDuration)
 }
 
 internal fun nativeMetadataEditHandled(response: String): Boolean {