change (room avatar) : use TextAvatar from TombstonedRoomAvatar

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/components/avatar/TombstonedRoomAvatar.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.designsystem.components.avatar
+
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import io.element.android.compound.theme.AvatarColors
+import io.element.android.compound.theme.ElementTheme
+
+@Composable
+fun TombstonedRoomAvatar(
+    size: AvatarSize,
+    modifier: Modifier = Modifier,
+    contentDescription: String? = null,
+) {
+    TextAvatar(
+        text = "!",
+        size = size.dp,
+        colors = AvatarColors(
+            background = ElementTheme.colors.bgSubtlePrimary,
+            foreground = ElementTheme.colors.iconTertiary
+        ),
+        modifier = modifier
+            .size(size.dp)
+            .clip(CircleShape),
+        contentDescription = contentDescription
+    )
+}