feat: Request notification permission on app startup for Android 13+; improve user experience and logging

app/src/main/java/com/rosetta/messenger/MainActivity.kt

@@ -1,11 +1,17 @@
 package com.rosetta.messenger
 
+import android.Manifest
 import android.content.Context
+import android.content.pm.PackageManager
+import android.os.Build
 import android.os.Bundle
 import android.util.Log
 import androidx.activity.ComponentActivity
+import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.core.content.ContextCompat
 import androidx.lifecycle.lifecycleScope
 import androidx.compose.animation.*
 import androidx.compose.animation.core.FastOutSlowInEasing
@@ -78,7 +84,34 @@ class MainActivity : ComponentActivity() {
         // Используем новый оптимизированный кэш
         OptimizedEmojiCache.preload(this)
         
-        setContent {
+        setContent {            // 🔔 Запрос разрешения на уведомления для Android 13+
+            val notificationPermissionLauncher = rememberLauncherForActivityResult(
+                contract = ActivityResultContracts.RequestPermission(),
+                onResult = { isGranted ->
+                    Log.d(TAG, "📬 Notification permission result: $isGranted")
+                    if (!isGranted) {
+                        Log.w(TAG, "⚠️ User denied notification permission")
+                    }
+                }
+            )
+            
+            // Запрашиваем разрешение при первом запуске (Android 13+)
+            LaunchedEffect(Unit) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                    val hasPermission = ContextCompat.checkSelfPermission(
+                        this@MainActivity,
+                        Manifest.permission.POST_NOTIFICATIONS
+                    ) == PackageManager.PERMISSION_GRANTED
+                    
+                    if (!hasPermission) {
+                        Log.d(TAG, "📬 Requesting notification permission...")
+                        notificationPermissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
+                    } else {
+                        Log.d(TAG, "✅ Notification permission already granted")
+                    }
+                }
+            }
+            
             val scope = rememberCoroutineScope()
             val isDarkTheme by preferencesManager.isDarkTheme.collectAsState(initial = true)
             val isLoggedIn by accountManager.isLoggedIn.collectAsState(initial = null)