[BUG] ChannelMediaAttachmentsScreen crashes with duplicate item.id in LazyGrid

[subramanian-zuper]

Bug Description

ChannelMediaAttachmentsScreen crashes intermittently with duplicate item.id values in LazyGrid causing key collisions.

Error

java.lang.IllegalArgumentException: Key "-1891661558-Loading" was already used. 
If you are using LazyColumn/Row please make sure you provide a unique key for each item.

Environment

• stream-chat-android-compose: 6.28.0
• stream-chat-android: 6.28.0
• Android OS: 15 (API 35)
• Architecture: arm64-v8a

Reproduction

StreamChatTheme {
    val mediaViewModelFactory = remember {
        ChannelAttachmentsViewModelFactory(
            cid = navTarget.cid,
            attachmentTypes = listOf(AttachmentType.IMAGE, AttachmentType.VIDEO),
        )
    }
    
    ChannelMediaAttachmentsScreen(
        modifier = Modifier
            .fillMaxSize()
            .statusBarsPadding(),
        viewModelFactory = mediaViewModelFactory,
        onNavigationIconClick = { performUpNavigation() }
    )
}

Steps

1. Navigate to ChannelMediaAttachmentsScreen with multiple media attachments
2. Crash occurs intermittently when multiple items have duplicate IDs

Stack Trace

java.lang.IllegalArgumentException: Key "-1891661558-Loading" was already used.
    at androidx.compose.foundation.lazy.grid.LazyGridKt$rememberLazyGridMeasurePolicy$1$1.invoke-0kLqBqw (SourceFile:837)
    at androidx.compose.foundation.lazy.layout.LazyLayoutKt$LazyLayout$1$2$1.invoke-0kLqBqw (SourceFile:14)

Additional Info

• Crash ID: 35a4ed7c-e6aa-4417-a588-61061b090979
• Session ID: 0834bdd0-1607-4749-9932-fb990116c5b9
• Timestamp: 2025-12-04 11:34:31 UTC
• Not consistently reproducible