Refactor image handling and decoding logic

- Introduced a maximum bitmap decode dimension to prevent excessive memory usage.
- Enhanced base64 to bitmap conversion by extracting payload and applying EXIF orientation.
- Improved error handling for image downloads and decoding processes.
- Simplified media picker and chat input components to manage keyboard visibility more effectively.
- Updated color selection grid to adaptively adjust based on available width.
- Added safety checks for notifications and call actions in profile screens.
- Optimized bitmap decoding in uriToBase64Image to handle large images more efficiently.

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

@@ -366,6 +366,8 @@ class MainActivity : FragmentActivity() {
         super.onResume()
         // 🔥 Приложение стало видимым - отключаем уведомления
         com.rosetta.messenger.push.RosettaFirebaseMessagingService.isAppInForeground = true
+        // ⚡ На возврате в приложение пробуем мгновенный reconnect без ожидания backoff.
+        ProtocolManager.reconnectNowIfNeeded("activity_onResume")
     }
 
     override fun onPause() {
@@ -624,6 +626,9 @@ fun MainScreen(
 
     // Navigation helpers
     fun pushScreen(screen: Screen) {
+        // Anti-spam: do not stack duplicate screens from rapid taps.
+        if (navStack.lastOrNull() == screen) return
+        if (screen is Screen.Requests && navStack.any { it is Screen.Requests }) return
         navStack = navStack + screen
     }
     fun popScreen() {