fix(chat): don't freeze the author-info flag at first composition

[AndyScherzinger]

Fixes group chats rendering incoming messages without the author's avatar and display name since the recent room-list/prefetching changes.

Root cause

ChatActivity.setChatListContent() read ChatUiState.isOneToOneConversation — which, despite its name, carries "show author avatars and names", i.e. !conversation.isOneToOneConversation() as set in ChatViewModel.observeConversation() — through remember { mutableStateOf(uiState.isOneToOneConversation) } without a key. That snapshots the field at the very first composition and never updates it again.

Whether that snapshot was correct was a race: it only held the real value when the conversation emission from the database reached uiState before the ComposeView's initial composition. Since the conversation list, chat opening and message prefetching moved onto local database flows (#6454, #6498), a chat opens straight from the cache and the first composition reliably runs before the conversation state lands — the flag stays frozen at its default false, and MessageScaffold (incoming && isOneToOneConversation && !isGrouped) never shows the avatar or the author name in group chats. The conversation-avatar caching (#6499) is not directly involved; chat-message avatars use the default Coil loader.

Fix

Read the flag directly from the collected uiState, so the message list recomposes with the real value once the conversation arrives. Also drops the debug log that would otherwise print on every recomposition.

Possible follow-up (deliberately out of scope for this fix): the field's inverted naming — isOneToOneConversation holding "is NOT one-to-one" across ChatUiState, ChatViewState, ChatMessageContext and the message composables — is what made this freeze hard to spot and is worth a rename.

🖼️ Screenshots

To be added during manual verification — the fix was developed in a remote environment without an emulator or test server, so no genuine screenshots could be captured. Expected: before, a group chat shows incoming messages without avatar/author name; after, ungrouped incoming messages show both.

🏚️ Before	🏡 After
screenshot pending	screenshot pending

🚧 TODO

• Manual verification on a group chat
• Add before/after screenshots

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed — UI composition timing fix; no testable unit seam in ChatActivity
• 🔖 Capability is checked or not needed
• 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

🤖 Generated with Claude Code

https://claude.ai/code/session_01Nz3sNhRhLG4zkwVULowGW5

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/32587171033/artifacts/9479465400
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/32625591738/artifacts/9489667473
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/32626458502/artifacts/9489911495
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)