feat: Integrate AvatarRepository into chat components for improved avatar handling and caching

app/src/main/java/com/rosetta/messenger/utils/AvatarFileManager.kt

@@ -230,9 +230,21 @@ object AvatarFileManager {
      */
     fun base64ToBitmap(base64: String): Bitmap? {
         return try {
-            val imageBytes = Base64.decode(base64, Base64.NO_WRAP)
-            BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size)
+            // Check for data URI prefix
+            val actualBase64 = if (base64.contains(",")) {
+                android.util.Log.d("AvatarFileManager", "🔍 Removing data URI prefix, orig len=${base64.length}")
+                base64.substringAfter(",")
+            } else {
+                base64
+            }
+            android.util.Log.d("AvatarFileManager", "🔍 Decoding base64, len=${actualBase64.length}, prefix=${actualBase64.take(50)}")
+            val imageBytes = Base64.decode(actualBase64, Base64.NO_WRAP)
+            android.util.Log.d("AvatarFileManager", "🔍 Decoded bytes=${imageBytes.size}")
+            val bitmap = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size)
+            android.util.Log.d("AvatarFileManager", "🔍 Bitmap result=${bitmap != null}, size=${bitmap?.width}x${bitmap?.height}")
+            bitmap
         } catch (e: Exception) {
+            android.util.Log.e("AvatarFileManager", "❌ base64ToBitmap error: ${e.message}")
             null
         }
     }