fix: improve history import logic & m3u file picker issue at Android 7-9

app/build.gradle.kts

@@ -22,8 +22,8 @@ android {
         applicationId = "com.antoniegil.astronia"
         minSdk = 24
         targetSdk = 36
-        versionCode = 1032
-        versionName = "1.0.3"
+        versionCode = 1040
+        versionName = "1.0.4"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables { useSupportLibrary = true }

app/src/main/java/com/antoniegil/astronia/ui/page/HomePage.kt

@@ -3,6 +3,7 @@ package com.antoniegil.astronia.ui.page
 
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.animation.AnimatedVisibility
@@ -228,7 +229,12 @@ fun HomePage(
                         trailingIcon = {
                             Row {
                                 IconButton(onClick = {
-                                    filePickerLauncher.launch(arrayOf("audio/x-mpegurl", "application/vnd.apple.mpegurl", "audio/mpegurl"))
+                                    val mimeTypes = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+                                        arrayOf("*/*")
+                                    } else {
+                                        arrayOf("audio/x-mpegurl", "application/vnd.apple.mpegurl", "audio/mpegurl")
+                                    }
+                                    filePickerLauncher.launch(mimeTypes)
                                 }) {
                                     Icon(Icons.Outlined.FolderOpen, stringResource(R.string.local_import))
                                 }

app/src/main/java/com/antoniegil/astronia/util/DataManager.kt

@@ -93,13 +93,31 @@ object DataManager {
                 return Pair(false, 0)
             }
             
-            val prefManager = SettingsManager.getInstance(context)
             val historyItems = SettingsManager.parseHistoryJson(jsonString)
             
+            if (historyItems.isEmpty()) {
+                return Pair(false, 0)
+            }
+            
+            val prefManager = SettingsManager.getInstance(context)
+            val existingHistory = prefManager.getHistory()
+            val existingUrls = existingHistory.map { it.url }.toSet()
+            
             prefManager.clearHistory()
             
-            var successCount = 0
+            val mergedItems = mutableListOf<HistoryItem>()
+            mergedItems.addAll(existingHistory)
+            
             historyItems.forEach { item ->
+                if (!existingUrls.contains(item.url)) {
+                    mergedItems.add(item)
+                }
+            }
+            
+            mergedItems.sortByDescending { it.timestamp }
+            
+            var successCount = 0
+            mergedItems.forEach { item ->
                 prefManager.addOrUpdateHistory(
                     item.url,
                     item.name,