fix(compose): scale online indicator dynamically for large avatars

The 96dp avatar in channel info screens used ExtraLarge indicator
dimensions (designed for 64dp), making the dot proportionally small.

- Convert OnlineIndicatorDimensions from enum to data class
- Scale indicator size proportionally for avatars > 64dp
- 96dp avatar now gets 24dp indicator (1.5x scale) instead of 16dp

Author: aleksandar-apostolov

stream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/components/avatar/OnlineIndicator.kt

@@ -50,9 +50,11 @@ internal fun OnlineIndicator(
     )
 }
 
-internal enum class OnlineIndicatorDimensions(val indicatorSize: Dp, val borderWidth: Dp, val offset: Dp) {
-    Small(indicatorSize = 8.dp, borderWidth = 1.dp, offset = 1.dp),
-    Medium(indicatorSize = 12.dp, borderWidth = 2.dp, offset = 2.dp),
-    Large(indicatorSize = 14.dp, borderWidth = 2.dp, offset = 2.dp),
-    ExtraLarge(indicatorSize = 16.dp, borderWidth = 2.dp, offset = 0.dp),
+internal data class OnlineIndicatorDimensions(val indicatorSize: Dp, val borderWidth: Dp, val offset: Dp) {
+    companion object {
+        val Small = OnlineIndicatorDimensions(indicatorSize = 8.dp, borderWidth = 1.dp, offset = 1.dp)
+        val Medium = OnlineIndicatorDimensions(indicatorSize = 12.dp, borderWidth = 2.dp, offset = 2.dp)
+        val Large = OnlineIndicatorDimensions(indicatorSize = 14.dp, borderWidth = 2.dp, offset = 2.dp)
+        val ExtraLarge = OnlineIndicatorDimensions(indicatorSize = 16.dp, borderWidth = 2.dp, offset = 0.dp)
+    }
 }

stream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/components/avatar/UserAvatar.kt

@@ -85,6 +85,15 @@ public fun UserAvatar(
 }
 
 internal fun BoxWithConstraintsScope.resolveIndicatorDimensions(): OnlineIndicatorDimensions = when {
+    maxWidth > AvatarSize.ExtraExtraLarge -> {
+        val scale = maxWidth / AvatarSize.ExtraExtraLarge
+        val base = OnlineIndicatorDimensions.ExtraLarge
+        OnlineIndicatorDimensions(
+            indicatorSize = base.indicatorSize * scale,
+            borderWidth = base.borderWidth,
+            offset = base.offset,
+        )
+    }
     maxWidth >= AvatarSize.ExtraExtraLarge -> OnlineIndicatorDimensions.ExtraLarge
     maxWidth >= AvatarSize.ExtraLarge -> OnlineIndicatorDimensions.ExtraLarge
     maxWidth >= AvatarSize.Large -> OnlineIndicatorDimensions.Large