feat: Add camera button to MediaGrid for quick access

app/src/main/java/com/rosetta/messenger/ui/components/AvatarImage.kt

@@ -7,7 +7,9 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.ui.graphics.Shape
 import androidx.compose.material3.Text
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
@@ -44,6 +46,7 @@ import kotlinx.coroutines.withContext
  * @param onClick Обработчик клика (опционально)
  * @param showOnlineIndicator Показывать индикатор онлайн
  * @param isOnline Пользователь онлайн
+ * @param shape Форма аватара (по умолчанию круг)
  */
 @Composable
 fun AvatarImage(
@@ -53,7 +56,8 @@ fun AvatarImage(
     isDarkTheme: Boolean,
     onClick: (() -> Unit)? = null,
     showOnlineIndicator: Boolean = false,
-    isOnline: Boolean = false
+    isOnline: Boolean = false,
+    shape: Shape = CircleShape
 ) {
     // Получаем аватары из репозитория
     val avatars by avatarRepository?.getAvatars(publicKey, allDecode = false)?.collectAsState() 
@@ -85,7 +89,7 @@ fun AvatarImage(
     Box(
         modifier = Modifier
             .size(size)
-            .clip(CircleShape)
+            .clip(shape)
             .then(
                 if (onClick != null) {
                     Modifier.clickable(onClick = onClick)
@@ -113,7 +117,8 @@ fun AvatarImage(
             AvatarPlaceholder(
                 publicKey = publicKey,
                 size = size,
-                isDarkTheme = isDarkTheme
+                isDarkTheme = isDarkTheme,
+                shape = shape
             )
         }
         
@@ -137,7 +142,8 @@ fun AvatarPlaceholder(
     publicKey: String,
     size: Dp = 40.dp,
     isDarkTheme: Boolean,
-    fontSize: TextUnit? = null
+    fontSize: TextUnit? = null,
+    shape: Shape = CircleShape
 ) {
     val avatarColors = getAvatarColor(publicKey, isDarkTheme)
     val avatarText = getAvatarText(publicKey)
@@ -145,7 +151,7 @@ fun AvatarPlaceholder(
     Box(
         modifier = Modifier
             .size(size)
-            .clip(CircleShape)
+            .clip(shape)
             .background(avatarColors.backgroundColor),
         contentAlignment = Alignment.Center
     ) {