[xsahil03x]

What

In group channels, the channel list showed a system message with a "You:" or sender prefix, e.g. "Salvatore: Salvatore cleared the chat history". Your own system messages also showed a delivery tick. The preview now shows a system message's text on its own, with no prefix and no tick.

• StreamMessagePreviewFormatter.formatMessage skips the prefix for system messages. The screen-reader label already did.
• ChannelListTileSubtitle doesn't show a delivery status for system messages, as it already doesn't for deleted ones.

A system message usually names the actor already, and the message list shows it without a sender. iOS UIKit and Android XML preview it the same way; SwiftUI and Compose prefix it, and RN shows no sender prefixes at all. Figma has no system-message preview variant.

This also enables "new system message increments the unread count" in unread_counts_test.dart. The truncation test in channel_list_test.dart now expects the bare text.

Fixes FLU-1096.

Stacked on #3105 (the e2e suite); GitHub retargets it to master once that merges.

Before	After

Verification

• stream_message_preview_text_test.dart: a system message from the current user, and one from another user, show no prefix in a group channel.

• stream_channel_list_item_test.dart: the subtitle shows the delivery status of your message, and hides it for your system message.

  Restoring the prefix fails the two preview tests, and restoring the tick fails the subtitle test.

• The channel, scroll view and utils suites pass; only the local macOS goldens fail.

• Android emulator against the real backend, in a 3-member group truncated with a system message by another member. Before, the preview read "Salvatore: Salvatore cleared the chat history". After, it reads "Salvatore cleared the chat history".

• e2e: the test is un-skipped and runs in this PR's E2E workflow.

v11: see the "Merging master into v11" comment on FLU-1096.

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Commits

Reviewing files that changed from the base of the PR and between 3d44386 and ada2463.

Files selected for processing: 7

• e2e_app/integration_test/channel_list_test.dart
• e2e_app/integration_test/unread_counts_test.dart
• packages/stream_chat_flutter/CHANGELOG.md
• packages/stream_chat_flutter/lib/src/scroll_view/channel_scroll_view/stream_channel_list_item.dart
• packages/stream_chat_flutter/lib/src/utils/message_preview_formatter.dart
• packages/stream_chat_flutter/test/src/channel/stream_message_preview_text_test.dart
• packages/stream_chat_flutter/test/src/scroll_view/channel_scroll_view/stream_channel_list_item_test.dart

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.40%. Comparing base (3d44386) to head (ada2463).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3124      +/-   ##
==========================================
+ Coverage   80.39%   80.40%   +0.01%     
==========================================
  Files         455      455              
  Lines       29628    29630       +2     
==========================================
+ Hits        23818    23823       +5     
+ Misses       5810     5807       -3     

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